Development of a multi-segmented proportional gas counter for β-decay spectroscopy at KISS
| Autor: | Michiharu Wada, Y. Kakiguchi, J. H. Park, Hironobu Ishiyama, Sunchan Jeong, J.Y. Moon, S. Kimura, H. Haba, M. Oyaizu, Yutaka Watanabe, M. Ahmed, M. Mukai, Yoshikazu Hirayama, A. Ozawa, Hiroari Miyatake, Peter Schury, Hideki Ueno |
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| Rok vydání: | 2020 |
| Předmět: |
Nuclear and High Energy Physics
Resistive touchscreen Materials science 010308 nuclear & particles physics Detector Electron Tracking (particle physics) 01 natural sciences Anode Isotope separation law.invention law 0103 physical sciences Atomic physics 010306 general physics Spectroscopy Instrumentation Hyperfine structure |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 463:421-424 |
| ISSN: | 0168-583X |
| DOI: | 10.1016/j.nimb.2019.04.036 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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