标题： 低能中微子对71Ga的响应：电子俘获率、电荷交换反应和壳模型计算 显示英文标题

标题： Low-energy neutrino responses for 71Ga by electron capture rates, charge exchange reactions and shell model calculations

摘要： 弱Gamow-Teller（GT）反应对于${}^{71}\mathrm{Ga}$中的低激发态至关重要，用于研究低能太阳中微子和镓异常，即可能向惰性态的转变。 首次使用实验电子俘获率、修正了张量相互作用效应的实验电荷交换反应（CER）率以及理论相互作用壳模型（ISM）计算，评估了基态、第一激发态和第二激发态的响应。 发现两个激发态对太阳和${}^{51}\mathrm{Cr}$中微子的贡献约为基态的$4.2 \pm 1.2\%$。 这比ISM值稍大，但比未修正张量相互作用效应的CER值略小。 镓异常远超出了获得的核响应的不确定性。 显示英文摘要

摘要： Weak Gamow-Teller (GT) responses for low-lying states in ${}^{71}\mathrm{Ga}$ are crucial for studying low-energy solar neutrinos and the Ga anomaly, i.e., the possible transition to the sterile state. The responses for the ground state, the first excited state, and the second excited state are evaluated for the first time using the experimental electron capture rates, the experimental charge exchange reaction (CER) rates corrected for the tensor-interaction effect and the theoretical interacting shell model (ISM) calculations. The contributions from the two excited states to the solar and ${}^{51}\mathrm{Cr}$ neutrinos are found to be $4.2 \pm 1.2\%$ of that for the ground state. This is slightly larger than the ISM values but little smaller than the CER values without corrections for the tensor interaction effect. The Ga anomaly is far beyond the uncertainty of the obtained nuclear responses.