论文标题
电子中微子光谱上的电子中中微子捕获的电子 - 中性捕获的延迟巧合
Delayed coincidence in electron-neutrino capture on gallium for neutrino spectroscopy
论文作者
论文摘要
这项工作解释了一种延迟的共同点方法，可以在镀至镀皮的电子中进行电子中微子光谱。具有大于407.6 keV的能量的电子中心可以在镀凝剂上捕获，并以平均寿命为114 ns的第一个激发态下产生一个子锗核。在GE的第一个激发状态之前，已释放的电子和伽玛可以产生代表太阳中微子能量的及时信号，而伽马为第一个激发态175 KeV的伽玛可以给出延迟的信号。评估了该电子中心捕获过程的横截面，并与氯对电子中的捕获相当。讨论了使用液体闪烁体的可能实现，以利用延迟的巧合。检测方案比使用115英寸等更可行，但需要一个更大的目标。所提出的方法可能有助于MEV尺度的太阳中微子光谱和溶解凝胶异常。
This work explains a delayed-coincidence method to perform MeV-scale neutrino spectroscopy with electron-neutrino capture on gallium. An electron-neutrino possessing energy greater than 407.6 keV can be captured on gallium and produce a daughter germanium nucleus at its first excited state with a mean lifetime of 114 ns. The released electron and gammas before the first excited state of Ge can generate a prompt signal representing the solar neutrino energy and the gamma from the deexcitation of the first excited state, 175 keV, can give a delayed signal. The cross-section of this electron-neutrino capture process is evaluated and is comparable with electron-neutrino capture on chlorine. A possible implementation with a liquid scintillator is discussed to exploit the delayed coincidence. The detection scheme is more feasible than using 115In, etc, but need a larger target. The proposed method can be helpful for the MeV-scale solar neutrino spectroscopy and for solving the gallium anomaly.
