The RISP 28GHz ECR ion source was transferred from the temporary test site to the RISP main site in 4Q 2019. Installation and precision alignment were completed in 1Q 2020. Cryostat cool-down started in October 2021 due to site mechanical equipment condition. In the operation of the superconducting electromagnet, after several training procedures, Ba.max=3.0T was reached in June 2021. The beam...
The TULIP project* aims to produce radioactive ion beams of short-lived neutron-deficient isotopes by using fusion-evaporation reactions in an optimized Target Ion Source System (TISS). The first step consists of the design of a TISS to produce rubidium isotopes. It was tested with a primary beam of 22Ne@4.5 MeV/A irradiating a natNi target at the SPIRAL1/GANIL facility in March 2022. Rates of...
The high-intensity proton beam of the TRIUMF H$^{-}$ 500 MeV cyclotron offers unique opportunities to produce rare isotopes by irradiating a variety of targets. In particular, the ISAC (Isotope Separation and ACceleration) facility [1] provides the infrastructure to deliver customized rare ion beams to experiments in the fields of nuclear structure, astrophysics, medicine, and material...
MYRRHA [1,2] (Multi-purpose hYbrid Research Reactor for High-tech Applications) will be the world’s first large-scale Accelerator Driven System project at power levels scalable to industrial systems. In parallel to the reactor, ISOL@MYRRHA [3] will produce Radioactive Ion Beams (RIBs) using the Isotope Separation On-Line (ISOL) technique. The isotope production will be increased by using a...
Neutron-rich EXotic nuclei around the neutron shell closure at N=126 and in the transfermium region are accessible via multinucleon Transfer reactions which features relative high cross-sections. However, the wide angular distributions of the multinucleon transfer products lead to experimental challenges in their separation and identification.
In order to overcome these...
$^{225}$Ac radiopharmaceuticals are being developed for the treatment of certain distributed cancers using targeted alpha therapy. However, supply shortages of $^{225}$Ac itself strongly constrain the progress of such research [1]. As a consequence, a number of accelerator-based production routes are being pursued at different facilities worldwide. Alongside the $^{226}$Ra(p,2n)$^{225}$Ac and...
Radionuclides have already revolutionised the field of nuclear medicine and the diagnosis and treatment of cancer patients. Some of the novel medical radionuclides can only be made using the Isotope Separation Online technique (ISOL). The radioactive species collected for medical applications need to be pure, which requires mass separation [1]. Terbium has been identified as a particularly...
The CERN-ISOLDE facility at CERN uses the Isotope Separation On-Line (ISOL) method to provide experiments with radioactive ion beams (RIBs). Isotopes are produced in thick targets and must undergo diffusion and effusion before reaching the ion source, where they are then ionized. Forming volatile molecules with the radioactive species of interest is a technique occasionally used to efficiently...
At the FRS Ion Catcher (FRS-IC) at GSI Darmstadt, Germany, short-lived nuclei produced with the fragment separator FRS are thermalized in a cryogenic stopping cell (CSC) and measured with a high-resolution multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS).
The MR-TOF-MS at the FRS-IC has been used for mass-measurement with resolving powers of up to 1,000,000 (FWHM) and...
The reaccelerator ReA at FRIB has been used for a successful science program with rare isotopes produced by projectile fragmentation. In the transition of the FRIB laboratory from providing rare isotopes from the National Superconducting Cyclotron Laboratory’s Coupled Cyclotron Facility to full FRIB operation with its high-power superconducting linear accelerator and new rare isotope...
For the operation of a radioactive ion beam (RIB) facility the employment of a suitable decay spectroscopy setup is essential. CERN-ISOLDE uses for more than 40 years a tape station as primary asset for the determination of RIB production yields and as diagnostic tool for beam commissioning before each physics experiment as well as radioactive beam development. To improve timing and noise...
Because of the magic number $\textrm{Z}=50$, there is great scientific interest in isotopes of tin and the neighboring indium and antimony nuclei. At CERN-ISOLDE, radioactive ion beams (RIBs) of In, Sn and Sb are typically produced from uranium carbide (neutron-rich) and lanthanum carbide (neutron-deficient) targets. While for the former two elements yield data is available, to date, no data...
The primary goal of a new facility, TAMUTRAP, at the Cyclotron Institute,
Texas A&M University, is to look for physics beyond the standard model by
searching for a possible scalar currents contributing to the weak
interaction. In particular, we will measure the $\beta$-$\nu$ correlation
parameter, $a_{\beta\nu}$, in several $T=2$ superallowed $\beta$-delayed proton
emitters...
Since 2001, the SPIRAL1 facility has been providing post-accelerated radioactive beam by the ISOL method. Over the last decade, SPIRAL1 has been improved to provide beams of condensable elements, by using a combination of a FEBIAD-type ion source (to produce 1+ ions) and a PHOENIX ECR charge breeder (to transform 1+ ions into N+ ions for post-acceleration).
The FEBIAD ion source has undergone...
Target temperature plays a crucial role in the performance of an ISOL target. At TRIUMF an optical technique has been developed and implemented on-line for direct temperature measurements simultaneous with beam heating. In this setup the light emitted by a hot target through the ionizer opening is collected via a set of optics and coupled into a spectrometer [1]. The method uses a spectrometer...
Korea University(KU) has installed 14 GHz Electron Cyclotron Resonance Ion Source (ECRIS) for researches on material science and bio science. The high voltage platform of KU-ECRIS had been upgraded form 10kV to 30kV. During the upgrade, the geometry of the plasma electrode is changed due to arc discharge occurred in cone-shaped plasma electrode. According to positions of plasma electrode,...
Uranium carbide (UCx) and silicon carbide (SiC) have been developed for the target materials of the RAON ISOL system. Based on the CERN technology, the fabrication process of the UCx target has been developed with the goal of the low density (< 3 g/cm3) and the large diameter (50 mm). It is planned to be used for the proton beams up to 10 kW and the prototype of the UCx target was fabricated,...
Terbium is an element that has four isotopes with interesting properties for medical applications, $^{149, 152, 155, 161}$Tb$^{[1]}$. These radioisotopes are however far from being sufficiently accessible, thereby hindering the pursuit of research on radiolabelling as well as clinical or preclinical investigations. Their lack of market availability is explained by difficulties in producing...
TRIUMF currently uses a FEBIAD ion source to generate 1+ radioactive ion beams of noble gases, halogens, or molecules. Typically, the offline ionization efficiency obtained for a TRIUMF FEBIAD source tends to be < 1 % for 40Ar+, however, other ISOL facilities report values ranging from 10-25%. To understand the limitation and optimize performance for both ISAC and the upcoming ARIEL facility,...
The ISAC facility has been producing radioactive ion beams for more than 20 years, however the infrastructure is beginning to age and revitalizing highly activated equipment poses challenges. Here we report on a plan to refurbish the ISAC infrastructure for increased reliability and with upgrades to improve science output. The main focus of this plan is the refurbishment of the ISAC target...
The development of new, more efficient laser ionisation schemes at the ISOLDE Resonance Ionisation Laser Ion Source (RILIS) directly impacts the yields of radioactive beams at ISOLDE [1]. Additionally, laser ionisation schemes which only use solid-state Titanium:Sapphire (Ti:Sa) lasers, are easier to maintain over long run durations [2]. An added bonus is reduced set up time, if the scheme...
At CERN-ISOLDE, among the main technical challenges for the production of radioactive ion beams (RIBs) is the design of target materials for in-target isotope production via nuclear reactions to allow for fast diffusion and effusion of the produced species for delivery to ISOLDE users. This requires a compromise between density and pore structure, while maintaining the required levels of...
Electron-beam-driven RI separator for SCRIT (ERIS) [1] was constructed as an online isotope separator (ISOL) system that is dedicated to produce a radioactive isotope (RI) beam for the SCRIT (Self-Confinement RI Target) electron scattering facility [2] at RIKEN RI Beam Factory. Electron scattering is one of the best ways to accurately understand the internal structure of atomic nuclei. The aim...
Several offline tests have been performed to investigate release properties of ISOL target materials and their geometric configurations, with the objective of understanding and improving the radioisotope release performance of online ISOL targets.
This contribution gives an overview of the general procedure which has been implemented at TRIUMF, consisting of activating ISOL target material...
The high-power driver beams of future accelerator facilities pose thermomechanical challenges for the design of beam intercepting components that need to dissipate increased power densities and sustain higher radiation damage levels. Additionally, target components and adjacent materials will also suffer from high fluxes of ionizing radiation, often degrading critical mechanical properties. In...
The Rare Isotope Science Project (RISP) plans to produce rare isotope using Isotope Separation On-line (ISOL) facility. The rare isotopes are produced in Target Ion Source (TIS) system by a 70 MeV proton beam incident on target via the proton-induced fission. RISP adopt module system controlled by remote handling system to handle and maintain the TIS system. The module system consists of...
The beam dump system was designed and fabricated to absorb residual protons of the μSR facility at the Rare Isotope Science Project in Korea. In the μSR facility, protons with 600 MeV energy are incident on the graphite target to generate muons, and only about 10% of the power is absorbed in the graphite target and the remaining power is either absorbed in the beam dump or used to break...
The S$^3$-LEB (Super Separator Spectrometer-Low Energy Branch) is a low energy radioactive ion beam installation dedicated to the study of exotic nuclei, which is currently under commissioning as a part of the GANIL-SPIRAL2 facility [1]. High intensity primary beams delivered by the superconducting LINAC of SPIRAL 2 will allow increased production rates of nuclei by fusion evaporation...
Nuclear beta decays provide a unique avenue for testing the electroweak part of the Standard Model through precision measurements. Physics beyond the Standard Model would manifest itself in these transitions through a variety of possible effects including a non-unitarity of the Cabibbo-Kobayashi-Maskawa quark mixing matrix, scalar or tensor currents, and interactions involving right-handed...
The Electron Beam Ion Source (EBIS) charge breeder is utilized to produce highly charged ions in Isotope Separation On-Line (ISOL) system of Rare isotope Accelerator complex for On-line experiments (RAON).
Offline and online tests of EBIS are performed by using stable ion beams, which are Cs, Sn, and Na. $^{133}$Cs$^{1+}$ ions from a test ion source were injected into the EBIS to measure the...
The Radio Frequency Quadrupole Cooler Buncher (RFQ-CB) of the heavy ion accelerator RAON is a device that cools the incoming ion beam and sends it out in the form of a bunch. In order to analyze the trapped ions and improve the performance of the RFQ-CB, we built a reference trap which is the miniaturized version of RFQ-CB. The reference trap consists of RF and DC electrodes in an octagon...
UNIST (Ulsan National Institute of Science and Technology) built a device called an Electron Beam Ion Trap (EBIT) to generate and study highly charged ions (HCI). In January 2022, preliminary experiments were carried out on highly charged argon ions. EBIT was delivered to Pohang City, where the PAL-XFEL is located, and successfully connected to the hard X-ray beam-line. Over the two R&D beam...
RISP's ISOL beamline system is for separation of specific ion beam generated by the target ion system (TIS) and transfers it to the downstream experimental device and linear accelerator. The commissioning using the stable isotope ion beam has been started in 2021, and a commissioning using the radioisotope ion beam is planned at the end of 2022. The beam diagnostic device is a key device that...
Gas stopping of energetic projectile fragments has been an important pathway to science with unique stopped and reaccelerated beams at the National Superconducting Cyclotron Laboratory (NSCL) for more than a decade. The NSCL has transitioned into the recently opened Facility for Rare Isotope Beams (FRIB) in order to provide significantly more exotic and more intense exotic beams, prompting...
Nowadays, many experiments in the field of nuclear structure, fundamental interactions and nuclear astrophysics require the use of exotic nuclei. These rare isotopes can be produced with modern powerful accelerator facilities at several laboratories worldwide. These laboratories solve the problem of the inherent small production cross sections via high primary beam intensities and high...
The NEXT project aims to study Neutron-rich, EXotic, heavy nuclei produced in multi-nucleon Transfer reactions[1]. Part of the NEXT setup is a 3T superconducting solenoid magnet with a 90-cm wide and 1.6-m long bore. The magnet will be used to focus the transfer products of interest and to separate those from unwanted by-products as well as from the unreacted primary beam.
We developed a...
A fast neutron facility, called NDPS (Nuclear Data Production System), is being constructed for nuclear science and applications at RAON (Rare Isotope Accelerator complex for ON-line experiments) in Korea. The NDPS has been designed to provide both white and mono-energetic neutrons, using 98 MeV deuteron and 20 – 83 MeV proton beams with a thick graphite and thin lithium targets, respectively....
The Facility for Rare Isotope Beams (FRIB) includes a powerful superconducting driver accelerator and an Advanced Rare Isotope Separator (ARIS). The ARIS collects and purifies the rare isotope fragments of interest for experiments in nuclear physics, nuclear astrophysics, fundamental symmetries, etc. ARIS consists of a vertical pre-separator and downstream horizontal separator section...
Characterizing a (high resolution) magnetic mass separator can be often tricky as it is difficult to find a stable ion source providing species with close enough masses to separate.
As these instruments perform a momentum separation (B rho = p/q), their mass and energy resolution are strictly the same at first order. One can use this property to characterize the mass resolution of a...
I. Martel$^1$, L. Acosta$^2$, J.L. Aguado$^1$, M. Assie$^3$, M. A. M. Al-Aqeel$^{4,25}$, A. Ballarino$^9$, D. Barna$^5$, R. Berjillos$^6$, M. Bonora$^9$, C. Bontoiu$^4$, M.J.G. Borge$^7$, J.A. Briz$^7$, I. Bustinduy$^8$, L. Bottura$^9$, L. Catalina-Medina$^8$, W. Catford$^{10}$, J. Cederkäll$^{11}$, T. Davinson$^{12}$, G. De Angelis$^{13}$, A. Devred$^9$, C. Díaz-Martín$^1$, T. Ekelöf$^{14}$,...
The use of high resolution optical measurements of the atomic structure is at the forefront of modern subatomic physics. Laser spectroscopy provides model-independent nuclear data of nuclear spins, moments and charge radii across long chains of isotopes [1]. This allows the study of the evolution of nuclear observables versus particle number to probe shape deformation, configuration mixing and...
The valence electron of a negative ion is not bound by a long-range Coulomb potential but instead a shallow induced dipole potential which mainly arises from electron-electron correlation. As a result, negative ions have binding energies of about an order of magnitude smaller than neutral atoms. These correlation effects can be probed by measuring the electron affinity (EA) which is the amount...
Among the numerous isomers hidden within the landscape of the nuclear chart, $^{235m}$U is the second lowest in energy, with the lowest being the well-known $\sim$8-eV $^{229m}$Th isomeric state. The study of these isomers via high-resolution laser spectroscopy provides a valuable insight into their nuclear properties, such as nuclear mean-squared charge radii and nuclear electromagnetic...
Resonant laser ionization and spectroscopy are widely used techniques at radioactive ion beam facilities to produce pure beams of exotic nuclei and measure the mean-square charge radii, spins and electromagnetic moments of these nuclei. In such measurements on the heaviest elements it is, however, difficult to combine a high efficiency with a high spectral resolution. A significant improvement...
Collinear laser spectroscopy is a powerful tool to study nuclear properties such as electromagnetic moments, spin, changes in charge radius, and shape in ground or isomeric states along isotopic chains. At the radioactive isotope (RI) beam factory of RIKEN, the in-flight fragmentation separator called Big-RIPS has supplied intense RI beams. A helium gas-catcher called SLOWRI has been developed...
The Resonance Ionization Laser Ion Source (RILIS) system based on Ti:Sapphire lasers pumped by a Nd:YAG laser has been developed for the on-line laser ion source for a new heavy ion accelerator, RAON, in Korea. As a milestone of extraction of rare isotopes produced through uranium fission, double magic nucleus of $^{132}$Sn is our first target. Thus, by employing a three-step resonance...
Rare Isotope Science Project (RISP) at Institute for Basic Science (IBS) has been carried out to construct a Rare isotope Accelerator complex for ON-line experiments (RAON).
Collinear Laser Spectroscopy (CLS) system will be installed in RAON's ISOL beamline and is being developed for the study of basic nuclear properties such as nuclear spin, electromagnetic moment, and mean square charge...
Optical spectroscopy of superheavy elements is experimentally challenging as their production yields are low, half-lives are very short, and their atomic structure is barely known. Conventional spectroscopy techniques such as fluorescence spectroscopy are no longer suitable since they lack the sensitivity required in the superheavy element research. A new technique called Laser Resonance...
Using collinear optical pumping technique, the laser-nuclear-spin-polarization beam facility at TRIUMF-ISAC, operating since 2002, routinely provides nuclear-spin polarized radioactive isotope beams, such as $^8$Li and $^{31}$Mg, for beta detected nuclear magnetic resonance studies in material science, biochemistry, nuclear physics, and fundamental symmetries. To meet the increasing demands...
The DESIR (Désintégration, Excitation et Stockage d’Ions Radioactifs) hall is a part of the new SPIRAL2 facility under construction at GANIL. This hall will be dedicated to the study of nuclear physics at low energy (30-60 keV). Dedicated projects have been proposed and are under construction to study the available rare isotopes, which are of particular interest for nuclear structure, nuclear...
The SCRIT (Self-Confinement RI ion Target) technique [1] is an internal target formation technique that achieves electron scattering off unstable nuclei produced from the ERIS (Electron-beam-driven RI separator for SCRIT) [2].
The target ions incident from the outside of the SCRIT are trapped transversely by the periodic focusing force of the electron beam and longitudinally by the well-type...
Collinear Laser Spectroscopy (CLS) has been used to investigate basic nuclear properties such as nuclear spin, electromagnetic moment, and mean-square charge radii for the radioctive isotopes produced by accelerator facilities.
For the RAON CLS experiment, tunable lasers essential to study various atom currently, are prepared, which are dye laser and Ti:Sa laser and their second harmonics...
To enable neutron time-of-flight (TOF) experiments at the RAON heavy-ion accelerator facility, we tested a single bunch beam selection method by combining a fast chopper and double gap buncher in the low-energy beam transport (LEBT) section. The fast chopper converts a CW beam into hundreds of nanoseconds pulsed beam. Then, the double gap buncher performs bunching to shorten the pulse length...
The measurement of the time of flight(TOF) of charged particles can give important information for particle identification through the determination of particle velocity. In order to improve the resolution of particle identification, it is effective to improve the time resolution of the scintillation counters for TOF measurements.
In the present study, we developed a plastic scintillation...
We have launched the “ONOKORO” project to understand cluster formation phenomena in nuclei and nuclear matter from measurements of the cluster knockout reactions (($p$,$p$X) reactions(X=$d$, $t$, $^3\mathrm{He}$, $\alpha$)).
In order to measure the reactions using inverse-kinematics, we have developed the “TOGAXSI” telescope consisting of Si trackers and large GAGG:Ce calorimeters. The...
The ONOKORO project has been launched to understand what kind of clusters exist in the atomic nucleus, and how the formation of the clusters changes depending on the neutron richness. The cluster knockout reactions in inverse kinematics are to be performed using heavy nuclear beams. A detector array TOGAXSI is going to be constructed to measure 100-230 MeV/u light ions emitted from the...
We have started a new research project named the “ONOKORO” project. The project comprehensively investigates clustering in medium-to-heavy mass nuclei with cluster knock-out reactions at the intermediate-energy facilities. "TOGAXSI" is the name of the new detector array. It measures scattering angles and the energies of d, t, 3He, and α emitted at 6-30 degrees in the laboratory system and...
In-flight fragment (IF) separator at RAON aims to generate various rare isotopes and separate isotope beams of interest. Detector system for beam particle identification at the separator has been developed based on TOF-Bρ-ΔE method. Parallel plate avalanche counters (PPACs), plastic scintillators, and silicon detectors will be used to measure the position, timing and energy-loss of the...
Silicon Photo Multiplier (SiPM) is a light sensor which has multi micro pixels working in Geiger mode with several tens of volts. The SiPM has been recognized as an alternative to the Photo Multiplier Tube (PMT) for its compact size of millimeter order and its robustness to magnetic field. The signals from SiPM are proportional to the number of fired pixels, not directly to the number of...
Recently, the combination of the highly pixelated active DSSSD AIDA implanter and the compact, high-efficiency Ge array DEGAS-I has been commissioned and employed for first successful NUSTAR experiments at FAIR Phase-0. Based on the experience gained, a novel type of implanter, FIMP, aiming for highest efficiency, low-noise and ultimate timing characteristics is under development. For the...
Precise lifetimes of excited nuclear states are essential information to understand the nuclear structure. For example, the nuclear quadrupole deformation can be reduced from the E2 transition probabilities of the nuclei. In these days LaBr3(Ce) crystals are commonly adopted to measure the lifetimes of excited states down to tens of picoseconds because of their prompt timing response and good...
Parallel Plate Avalanche Counter (PPAC) is generally used as beam-line detectors for position measurements in RI beam facilities. A delay-line PPAC, a conventional type of PPAC deduces the position of particles using the time difference of signals from both ends of electrodes connecting a delay line. However, there is a limit on the counting rates due to the multi-hitting within the delay...
Single-nucleon transfer reaction in inverse kinematics with radioactive beams is one of the powerful methods to study nuclear astrophysics, nuclear reaction, and other applications. Since outcoming particles from the transfer reaction carry important nuclear spectroscopic information, an accurate detection system for charged particles is required to measure their energies and angles. A silicon...
The Offline 2 mass separator laboratory is part of the CERN-ISOLDE Offline facilities - a suite of installations required to perform essential quality control on target and ion source units before irradiation at CERN-ISOLDE. The facility is also used for extended preparatory offline studies as a prerequisite before conducting any beam development on-line, especially establishing systematic...
The atomic masses are most fundamental physical quantity and is the indicator that determines its existence and stability of nuclides. Comprehensive mass measurements provide us with important information to enhance our knowledge of physics in extreme regions, such as the astronomical r-process and the origin of Uranium.
The multi-reflection time-of-flight mass spectrograph (MRTOF-MS)[1] is...
Experiments using RI beams often require identification of the nuclides. In case of projectile-fragment separator, the identification is performed by measuring time-of-flight, energy loss, and magnetic rigidity. Radiation damage to these detectors has become a problem due to the highly intense heavy ion beams. We have solved this problem by developing a nitrogen gas scintillation counter in...
KoBRA (KOrea Broad acceptance Recoil spectrometer and Apparatus) [1] will produce RI beams with energies of 5 to 10 MeV/u from stable ion beams (10 ~ 40 MeV/u) delivered from the superconducting linear accelerator SLC3 of RAON (Rare isotope Accelerator complex for ON-line experiments) [2]. In its early phase of operation, transfer reaction measurements with these RI beams can be performed for...
During the last decade, the multi-reflection time-of-flight mass spectrograph (MRTOF-MS) [1] became a powerful device for precise mass measurements of short-lived isotopes. Exotic ions produced at radioisotope facilities are stored in an electrostatic ion trap with nearly closed-path trajectories at kinetic energies on the order of a few keV, i.e. the ions are reflected back and forth...
The ultimate boundary of existence of chemical elements remains an open question. The heaviest elements known to date, called Superheavy Elements (SHEs, with $Z>103$), owe their existence to the stabilizing effect of nuclear shells, which counteracts the strong Coulomb repulsion that would otherwise cause their immediate fission. The SHIPTRAP mass spectrometer, placed behind the SHIP separator...
While neutrons emitted in intermediate heavy-ion collisions are essential to understand the properties of the strongly interacting baryonic matter, detection of neutrons and simulations of neutron detector performance and efficiencies are difficult. We have developed a SCINFUL-GEANT4 based on the reaction channels and cross-sections in the SCINFUL-QMD simulation code [1] which has a fixed...
nEXO is a proposed 5-tonne experiment that will search for neutrinoless double-beta decay (0νẞẞ) in 5-tonnes of liquid xenon (LXe), isotopically enriched in Xe-136. If observed, 0νẞẞ will violate the assumed symmetry of lepton number conservation in the Standard Model.
Complete position localization of events in the nEXO time projection chamber opens the possibility of extracting from the...
We have developed and commissioned a position-sensitive large-area microchannel plate (MCP) detector with a new digital data acquisition system. The MCP detectors coupled to delay-line anodes are powerful tools for single particle/photon counting, by providing information on position and impact time of each particle/photon [1]. Therefore, MCP detectors are widely utilized in experimental...
RIBF can provide very high-energy and high-intensity RI beams. However, the beam intensity is now limited due to the radiation damages and pile-up events of the particle identification (PID) detectors. Therefore, we are now developing a gaseous Xe scintillator, which is expected to have a better radiation hardness than the existing ones like plastic scintillators, ion chambers, and PPACs. It...
Neutron-induced reactions on actinides are used to study the fission process and to populate neutron-rich isotopes for nuclear spectroscopy. Such studies often benefit from direct measurement of the emission time, mass and/or kinetic energy of fission fragments, thus requiring efficient detectors with good time- and energy resolution. In the case of in-beam operation of the fission fragment...
The 14O(α,p)17F is nominated to be an important reaction that strongly affects the light curves of the Type Ⅰ X-ray burst model [1]. In addition, the reaction rate is known to determine the break-out path from the hot CNO cycle to the rp-process at sufficiently high temperatures (T9 > 0.5) [2]. While the reaction rate plays an important role, its large uncertainty due to lack of experimental...
The MRTOF-MS, which is allowed for the high precision (nuclear) mass measurement as one of the experimental devices of Rare isotope Accelerator complex for ON-line experiment (RAON), has been recently installed in the very-low energy experimental beamline of RAON. It will be utilized to measure the masses of the short-lived isotopes which are produced via proton-induced reactions at the ISOL...
A radio frequency quadrupole (RFQ) has been constructed as a front accelerator for a rare isotope accelerator facility. The RFQ has two power couplers that are operated simultaneously for high power operation to accelerate from proton to uranium. A coaxial transmission line was adopted to connect each power coupler and an 80kW solid state power amplifier(SSPA) which is consisted with...
A control system using EPICS was designed and developed to control and monitor components of the μSR facility at the Rare Isotope Science Project in Korea. In order to ensure that the components work normally during the facility operation, the status of components has to be checked continuously, moreover, the components have to be able to be controlled remotely. Experimental Physics and...
The region below doubly magic 208Pb in the nuclear chart is important to understand nuclear interactions, nuclear shell evolution, and nuclear-astrophysical r-process. However, this region remains “a blank spot” in the nuclear chart due to the difficulties of producing them using conventional reactions such as fission or fragmentation.
We used multi-nucleon transfer reactions of 136Xe...
In the standard electroweak model, the weak current with a Vector – Axial-vector (V-A) form explains the weak interaction in a phenomenological context. However, the Lee-Yang Hamiltonian conserving Lorentz symmetry allows right-handed (V+A) as well as scalar, and tensor currents. For decades there have been efforts searching for such exotic currents as a test of the standard model. In...
The studies of low-lying excited states of the neutron-rich nuclei near the shell closures are one of the foremost topics of nuclear physics. The information of unstable, neutron-rich nuclei near N=126 magicity below 208Pb is crucial for understanding not only the nuclear structure of heavy nuclei but also the astrophysical r-process. However, the study of the south of 208Pb in the nuclear...
The linear accelerator RAON, a component of the Rare Isotope Science Project, was developed to accelerate heavy ions from elements ranging from helium to uranium. The injector line consists of an Electron Cyclotron Resonance Ion Source, a Low Energy Beam Transport line, a Medium Energy Beam Transport line, and a Radio Frequency Quadrupole (RFQ). To improve beam quality, a multi-harmonic...
Direct reaction experiments in inverse kinematics are one of the best experimental tools to study a wide range of nuclear properties, providing a great probe into the nuclear structure of exotic nuclei and enabling the measurement of reactions relevant to many astrophysical scenarios. In order to fully exploit the next generation of radioactive ion beam facilities currently under development,...
In this interdisciplinary project, we investigate the nuclear structure of $^{21}$O by measuring the ground-state electromagnetic moments using the combined technique of fragmentation-induced spin polarization and $\beta$-nuclear magnetic resonance ($\beta$-NMR) method. However, the $^{21}$O isotope is not only important in such nuclear physics studies but also holds large potential importance...
TRIUMF’s Ion Trap for Atomic and Nuclear science (TITAN) performs mass spectrometry and in-trap spectrometry on rare isotopes generated at the Isotope Separator and Accelerator (ISAC) facility of TRIUMF. Recently, the TITAN Multi-Reflection Time Of Flight (MR-TOF) mass spectrometer has made high-precision mass measurements of isotopes of interest for constraining astrophysical r-process and...
RAON (Rare Isotope Accelerator complex for ON-line experiments) being constructed in Korea will provide both rare isotope and stable ion beams for nuclear physics as well as other applications, at a wide energy range of about 5 – 200 MeV/nucleon. One of low-energy experimental facilities, so-called KoBRA (Korea Broad acceptance Recoil spectrometer and Apparatus), will be utilized to produce...
With the development of unstable nuclei beam generation and separation capabilities, the field of unstable nuclei research has expanded to include the measurement of various nuclei. At RIKEN, new isotopes have been discovered one after another, and the research has been expanded to the neutron-rich side or the region with large atomic number Z, such as 180Er with the largest Z, Z = 68....
Muonic X-ray Spectroscopy is a technique that utilizes the properties of the muon to gain information about the structure of the atom and the nucleus. When interacting with an atom, the muon can be captured in a high principal atomic quantum number state. Once this occurs, it rapidly decays through the muonic energy levels to the atomic ground state, emitting high-energy X-rays (up to 10...
With the extension of the nuclear chart to more extreme regions, the precise and accurate measurement of the decay properties also become more and more challenging. Part of the solution to tackle down some of these challenges is to improve the detection setup of the nuclear experimental setup. One of these solutions is the transition to a fully digital electronic acquisition system.
The...
We are currently studying the nuclear physics and material science using β-NMR technique, that is to observe the nuclear magnetic resonance (NMR) by using the asymmetry of the β-ray angular distribution emitted from spin-polarized nuclei. In this research, we are developing a β-MRI technique that applies the β-NMR method to magnetic resonance imaging (MRI), which is already widely used in the...
The selective production of radioisotopes with low-energy particle accelerators based on fusion-evaporation reactions, or in nuclear reactors with neutron capture, partially relies on the availability of isotopically pure target material. For example, the production of the medical radioisotope Lutetium-177, a rising star in nuclear medicine, depends upon the availability of Ytterbium-176 as...
Production of medical radionuclides often requires the use of isotopically enriched targets. Depending on the natural abundance of the isotope in question and the chemical properties of the element to be enriched, the throughput of isotope enrichment facilities varies considerably. Different production paths may lead to the same radionuclide, e.g. (p,n), (p,2n), (p,α) or deuteron or α induced...
The CERN-Nano Laboratory is a recent extension to the Class A Laboratories, CERN’s only laboratory with the capabilities to manipulate and change the chemistry of highly radioactive open-sourced materials.
Both the CERN-ISOLDE (Isotope Separator On Line DEvice at CERN) and CERN-MEDICIS facilities (MEDical Isotopes Collected from ISolde) have the resources to create radioactive ion beams using...
DESIR, the low-energy facility of GANIL/SPIRAL2 is presently in its final design phase. It will provide users with high-quality exotic beams at energies up of 60 keV. The call for tenders for the construction of the facility has been launched and construction should start in 2023.
The paper will present the physics case of the DESIR facility, its general layout and the instrumentation under...
