The MULTI spectrometer for measurement of β-decay process in exotic nuclei
| Autor: | Sergey Stukalov, D. A. Testov, Y. E. Penionzhkevich, Zhasulan Zeinulla, V. Smirnov, I. Siváček, Y. Sobolev |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Scintillation Spectrometer Astrophysics::High Energy Astrophysical Phenomena QC1-999 Monte Carlo method Detector gamma-ray spectrometer Nuclear physics monte carlo simulations Scientific method phoswich detector Phoswich detector Neutron Electronic anticoincidence Nuclear Experiment 3he neutron counters |
| Zdroj: | EPJ Web of Conferences, Vol 253, p 01003 (2021) |
| Popis: | The construction of the portable spectrometer, MULTI, is designed for the measurement of β-γ-neutron coincidences on beams of radioactive exotic nuclei. It will be used in measurements of the β-decay process of neutron-rich nuclei with large Qβ values accessible in radioactive beams facilities. The experimental technique includes the measurement of the ratios between gamma-ray emission and multi-neutron emission, following beta-decay of radioactive nuclei implanted into an active target. The construction of a gamma-ray spectrometer based on high-volume CeBr3+NaI(Tl) phoswich scintillation detectors is introduced. Results of the measurements of its fundamental characteristics – total detection efficiency, peak efficiency and Compton suppression effect with a 60Co source are presented. Design of the neutron counter array, consisting of 40 proportional counters filled with 3He gas, was optimized with Monte Carlo simulations. Results were validated with a 252Cf spectroscopic source, leading to expected detection efficiency of ∼35% for neutrons with energy < 1MeV. Further development plans are discussed. |
| Databáze: | OpenAIRE |
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