arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1604.01503physics.ins-detastro-ph.COhep-exnucl-ex
收藏

用XMASS-I探测器测量低能γ射线在液态氙中引起的闪烁时间分布

A measurement of the time profile of scintillation induced by low energy gamma-rays in liquid xenon with the XMASS-I detector

XMASS Collaboration, H. Takiya, K. Abe, K. Hiraide, K. Ichimura, Y. Kishimoto, K. Kobayashi, M. Kobayashi, S. Moriyama, M. Nakahata, T. Norita, H. Ogawa, H. Sek… 展开作者

XMASS Collaboration, H. Takiya, K. Abe, K. Hiraide, K. Ichimura, Y. Kishimoto, K. Kobayashi, M. Kobayashi, S. Moriyama, M. Nakahata, T. Norita, H. Ogawa, H. Sekiya, O. Takachio, A. Takeda, S. Tasaka, M. Yamashita, B. S. Yang, N. Y. Kim, Y. D. Kim, Y. Itow, R. Kegasa, K. Kobayashi, K. Masuda, K. Fushimi, K. Martens, Y. Suzuki, R. Fujita, K. Hosokawa, K. Miuchi, N. Oka, Y. Onishi, Y. Takeuchi, Y. H. Kim, J. S. Lee, K. B. Lee, M. K. Lee, Y. Fukuda, K. Nishijima, S. Nakamura

摘要:

本文报道了在XMASS-Ⅰ 832公斤液体氙闪烁探测器上测量γ射线诱发事件的闪烁发射时间分布。衰减时间常数是从观察到的数据和模拟样品之间的闪烁光子定时分布的比较,以考虑到光学过程,如吸收和散射液体氙。放射源$^{55}$ Fe、$^{241}$ Am和$^{57}$ Co的校准数据用于获得衰变时间常数。假设有两个衰变分量,$τ_1$和$τ_2$,当γ射线能量从5.9 keV增加到122 keV时,衰变时间常数$τ_2$从27.9 ns增加到37.0 ns。在所有能级上测量的准确度优于1.5 ns。需要具有$τ_1 \sim 2$ ns的快速衰减组件来再现数据。能量依赖性的$τ_2$和分数的快速衰变组件进行了研究,作为一个功能的动能的电子诱导的γ射线。所获得的数据几乎再现了先前报道的结果,并将其扩展到与直接暗物质搜索相关的较低能量区域。

英文摘要:

We report the measurement of the emission time profile of scintillation from gamma-ray induced events in the XMASS-I 832 kg liquid xenon scintillation detector. Decay time constant was derived from a comparison of scintillation photon timing distributions between the observed data and simulated samples in order to take into account optical processes such as absorption and scattering in liquid xenon. Calibration data of radioactive sources, $^{55}$Fe, $^{241}$Am, and $^{57}$Co were used to obtain the decay time constant. Assuming two decay components, $τ_1$ and $τ_2$, the decay time constant $τ_2$ increased from 27.9 ns to 37.0 ns as the gamma-ray energy increased from 5.9 keV to 122 keV. The accuracy of the measurement was better than 1.5 ns at all energy levels. A fast decay component with $τ_1 \sim 2$ ns was necessary to reproduce data. Energy dependencies of $τ_2$ and the fraction of the fast decay component were studied as a function of the kinetic energy of electrons induced by gamma-rays. The obtained data almost reproduced previously reported results and extended them to the lower energy region relevant to direct dark matter searches.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑