Energy deposition on nuclear emulsion by slow recoil ions for directional dark matter searches

Energy deposition on nuclear emulsion by slow recoil ions for directional dark matter searches
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慢反冲离子在核乳液上的能量沉积用于定向暗物质搜索

DOI:
10.1103/physrevd.105.063014
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发表时间:
2022
期刊:
影响因子:
5
通讯作者:
Nakamura Kiseki D.
Nakamura Kiseki D.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Hitachi Akira;Mozumder A.;Nakamura Kiseki D.

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评估了 5-200 keV 的 C 离子和 5-600 keV 的 Kr 离子沉积在核乳液上的电子能量,并将其与快离子沉积的电子能量进行比较,以设计和制造用于定向暗物质搜索的细粒核乳液。评估了核猝灭因子和电子线性能量转移(指沿离子轨道沉积的特定电子能量)。所谓的重离子径迹结构的核心和半影经过修改,以了解暗物质候选物(即弱相互作用的大质量粒子)产生的反冲离子撞击核乳剂 AgBr 晶体中的核而引起的径迹。还研究了在衰变过程中产生的非常重的反冲离子,即 100–180 keV 的铅离子。此外,还评估了 25-80 keV 质子引起的轨道结构,以考虑地下实验室中背景中子的影响。
The electronic energy deposited on nuclear emulsions by C ions of 5–200 keV and Kr ions of 5–600 keV is evaluated and compared with those deposited by fast ions for designing and fabricating fine-grain nuclear emulsions for directional dark matter searches. The nuclear quenching factor and the electronic linear energy transfer, which refers to the specific electronic energy deposited along the ion track, are evaluated. The so-called core and penumbra of heavy-ion track structure is modified to understand the track caused by recoil ions produced by dark matter candidate, i.e., weakly interacting massive particles, striking a nucleus in the AgBr crystal of nuclear emulsion. Very heavy recoil ions, 100–180 keV Pb ions, produced indecay are also studied. Furthermore, the track structures due to protons of 25–80 keV are evaluated to consider the influence of background neutrons in underground laboratories.
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