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Development of a multi-segmented proportional gas counter for β-decay spectroscopy at KISS.

Authors :
Mukai, M.
Hirayama, Y.
Schury, P.
Watanabe, Y.X.
Ahmed, M.
Haba, H.
Ishiyama, H.
Jeong, S.C.
Kakiguchi, Y.
Kimura, S.
Moon, J.Y.
Oyaizu, M.
Ozawa, A.
Park, J.H.
Ueno, H.
Wada, M.
Miyatake, H.
Source :
Nuclear Instruments & Methods in Physics Research Section B. Jan2020, Vol. 463, p421-424. 4p.
Publication Year :
2020

Abstract

We developed a multi-segmented proportional gas counter to perform β -decay spectroscopy of neutron-rich nuclei extracted from KEK Isotope Separation System (KISS). The 32 segmented gas counters allow us two-dimensional tracking of the events to identify β -ray events by discriminating background events. The detectors being by low-density material of thin aluminized Mylar foils and P10 gas enabled us to detect low energy electrons down to 100 keV. The absolute detection efficiency was 45% at Q β = 1 MeV, and the measured background event rate was 0.11 cps. The detector was applied to perform β -decay spectroscopy and hyperfine structure measurements of neutron-rich isotopes of Pt, Ir, and Os. We started to develop the gas counter with three-dimensional tracking by replacing the material of anode wire from BeCu to resistive thin carbon to reduce the background event rate below 0.01 cps. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0168583X
Volume :
463
Database :
Academic Search Index
Journal :
Nuclear Instruments & Methods in Physics Research Section B
Publication Type :
Academic Journal
Accession number :
140876177
Full Text :
https://doi.org/10.1016/j.nimb.2019.04.036