Ionization yield from nuclear recoils in liquid-xenon dark matter detection |
| |
| Institution: | 1. INPAC, Department of Physics, and Shanghai Key Lab for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai 200240, PR China;2. Maryland Center for Fundamental Physics, University of Maryland, College Park, MD 20742, USA;1. Programa de Doctorado en Ciencias Básicas (Ciencias Nucleares), Unidad Académica de Estudios Nucleares de la Universidad Autónoma de Zacatecas, Mexico;2. Programa de Doctorado en Ingeniería y Tecnología Aplicada, Unidad Académica de Ingeniería Eléctrica de la Universidad Autónoma de Zacatecas, Mexico;3. Unidad Académica de Estudios Nucleares de la Universidad Autónoma de Zacatecas, Mexico;1. Department of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, Sweden;2. Institute of Applied Physics, TU Wien, 1040 Vienna, Austria;1. Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany;2. CEA, LIST, Laboratoire National Henri Becquerel, F-91191 Gif-sur-Yvette, France |
| |
| Abstract: | The ionization yield in a two-phase liquid xenon dark-matter detector has been studied in keV nuclear recoil energy region. The newly obtained nuclear quenching as well as the average energy required to produce an electron–ion pair from the measurement in Seguinot (1992) are used to calculate the total electric charges produced. To estimate the fraction of the electron charges collected, the Thomas-Imel model is generalized to describe the field dependence for nuclear recoils in liquid xenon. With free parameters fitted to experimentally measured 56.5 keV nuclear recoils, the energy dependence of ionization yield for nuclear recoils is predicted, which increases as recoil energy decreases and reaches the maximum value at 2∼3 keV. This prediction agrees well with existing data and may help to lower the energy detection threshold for nuclear recoils to ∼1 keV. |
| |
| Keywords: | Liquid Xenon Dark Matter WIMPs Ionization Yield |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
