Speaker
Ms
Su-yeon Park
(Ewha Womans Univ.)
Description
The AMoRE (Advanced Mo based Rare decay Experiment) phase-II requires pure crystals with ultra-low radioactive contamination (< 4 micro Bq/kg of Th-228) to achieve the zero background level in the ROI (Region of Interest) of the neutrinoless double decay from the Mo-100. The raw material of the crystals, enriched 100MoO3 powder, should have very low contamination. An array of 14 HPGe detectors (980%) was constructed at the Yangyang underground laboratory in spring 2017 for measuring a small amount of radioactive isotopes by using coincidence signals from two detectors. Activities of various radioactive isotopes in a sample of 100MoO3 powder measured with data taken for about 80 days will be presented in this presentation.
Primary authors
Prof.
Insik Hahn
(Ewha Womans Univ.)
Dr
Moo Hyun Lee
(IBS)
Ms
Su-yeon Park
(Ewha Womans Univ.)
Prof.
Yeongduk Kim
(Institute for Basic Science)
Co-authors
Dr
Douglas Leonard
(IBS Center for Underground Physics)
Ms
Eunkyung Lee
(Center for Underground Physics (IBS))
Ms
Gowoon Kim
(Center for Underground Physic, IBS / Ewha Womans University)
Dr
Woongu Kang
(IBS Researcher)
