A Study of 48deplCa100MoO4 Scintillation Crystals for the AMoRE-I Experiment
| Autor: | Moo Hyun Lee, Puruswottam Aryal, C. W. Park, Sujita Karki, H. J. Kim, Sun-Whe Kim, Y. D. Kim, Jun-Hyeok Lee |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Nuclear and High Energy Physics 010308 nuclear & particles physics Monte Carlo method Analytical chemistry chemistry.chemical_element 01 natural sciences Photon yield Crystal Actinium Nuclear Energy and Engineering chemistry 0103 physical sciences Scintillation crystals Underground laboratory Nuclide Electrical and Electronic Engineering 010306 general physics |
| Zdroj: | IEEE Transactions on Nuclear Science. 65:2041-2045 |
| ISSN: | 1558-1578 0018-9499 |
| Popis: | Advanced Molybdenum-based Rare process Experiment (AMoRE) searching neutrinoless double-beta ( $0\nu \beta \beta $ ) decay of 100Mo from 48deplCa100MoO4 (CMO) scintillation crystals has been preparing CMO crystals for the phase-I stage, AMoRE-I. Nine CMO crystals with a total weight of 3.39 kg were produced by the FOMOS-Materials in Russia and delivered to the Yangyang Underground Laboratory (Y2L) in South Korea for about 2 years until the end of 2016. Acceptance tests of all the nine crystals on weight, dimension, transmittance, light output, energy resolution, and internal radioactivities were completed in the middle of 2017. We have set the upper limits of internal radioactivity levels for 228Th, 226Ra, and 227Ac (daughters of 232Th, 238U, and 235U), and the total alpha activity of U/Th in the crystals via a GEANT4 Monte Carlo simulation to achieve zero background in region of interest. We used a delayed-coincidence analysis to separate the alphas from gamma background events. Results of the acceptance tests showed that all the crystals are qualified for the AMoRE-I. We will present the test results of the nine crystals together with a reference crystal. |
| Databáze: | OpenAIRE |
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