用于暗物质搜索的类布拉格曲线;二元气体
Bragg-like curve for dark matter searches; binary gases
摘要：
低能反冲离子的定向探测为观测银河系中的暗物质提供了强有力的可能性。计算了5-200 keV反冲离子在N_2、CO_2、CF_4和CS_2气体中的猝灭因子，给出了电子能量沉积随射程变化的类布拉格曲线。类似布拉格的曲线用于使用气体TPC定向搜索暗物质候选者WIMP。还估算了在干燥空气、N_2、CO_2、CF_4和CS_2中α衰变产生的超重离子的猝灭因子，并与实验值进行了比较。
英文摘要：
The directional detection of low-energy recoil ions can provide strong possibility for observation of dark matter in the Galaxy. Quenching factors for 5-200 keV recoil ions in N2, CO2, CF4 and CS2 gases are evaluated and Bragg-like curves, the electronic energy deposition as a function of the projected range, are presented. The Bragg-like curves are intended for directional search for the dark matter candidate, WIMPs, using the gas TPC. Quenching factors for very heavy ions produced in alpha-decay in dry air, N2, CO2, CF4 and CS2 are also estimated and compared with experimental values.
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