Speaker
Description
CRIB [1,2] is a low-energy radioactive-isotope (RI) beam separator operated by CNS, University of Tokyo, located at RIBF of RIKEN Nishina Center. Various experimental projects based on interests for nuclear structure, reaction, and nuclear astrophysics have been carried out at CRIB, forming international collaborations. CRIB can produce intense RI beams at low energies (< 10 MeV/nucleon) by in-flight method, using a cryogenic gas target system for the beam production.
One of the major interests of CRIB collaboration is on the astrophysical reactions in high-temperature stellar environments, such as X-ray bursters, where many reactions involving RI play important roles. In the breakout path from the hot hydrogen burning to the rp-process, several alpha-induced reactions define the energy production rate and nucleosynthesis paths, however, those reactions are often difficult to measure experimentally. Recent experimental efforts at CRIB to pin down those reaction rates are introduced [3,4].
CRIB has a similar design with the KoBRA spectrometer in RAON, and the knowledge and experience at CRIB could be inherited to future experiments at KoBRA, based on the firm collaboration that was already established between Korean and Japanese researchers. Possibilities of new experimental projects in this direction are also suggested and discussed.
References
[1] Y. Yanagisawa, S. Kubono et al., Nucl. Instr. Meth. A 539, 74 (2005).
[2] H. Yamaguchi, Y. Wakabayashi et al., Nucl. Instr. Meth. A 589, 150 (2008).
[3] S. Hayakawa, M.L. Cognata et al., Astrophys. J. Lett, 915, L13 (2021).
[4] J. Hu, H. Yamaguchi et al., Phys. Rev. Lett. 127, 172701 (2021).