| Summary: | 碩士 === 國立臺灣大學 === 物理研究所 === 102 === With the advent of detectors with sub-keV sensitivities, atomic ionization of detectors has been identified as a promising avenue to probe possible neutrino electromagnetic properties and light dark matter. We begin with the process involving ionization of hydrogen, a few-body toy model that has analytic result, by different interactions and compare the result with several approximations often used in atomic physics in oder to study possible influence of atomic structure and the applicabilities of various approximations from this simple case. Next, with the use of an ab initio calculation, multiconfiguration relativistic random-phase approximation theory (MCRRPA), we are able to study practical detectors like germanium (Ge). The general features being found from hydrogen is useful for cases where Ge detectors are considered. The main goal is to provide more reliable cross section results with reasonable theoretical error estimation than the conventionally used formula. Based on the spectrum from the Kuo-Shen Nuclear Power Station, constraints of neutrino electromagnetic properties are obtained.
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