Continuing Observation of Solar Neutrino Emission with the Homestake Chlorine Neutrino Detector

在20世纪后期的每一个突出的天体物理学问题的清单上都有“太阳中微子问题”，或者与太阳内部模型预测的中微子相比，探测到的中微子的不足。在南达科塔州Homestake矿，用高氯乙烷（清洗液）测量太阳中微子。溶液中的氯原子被太阳中微子转化为氩-37同位素，然后被提取出来测量中微子发射的速率。20多年前，在霍姆斯特克首次发现了探测到的中微子的缺陷。此后，在俄罗斯、日本和意大利也相继建立了其他几个中微子探测设施。该奖项将为Homestake实验的运营提供额外两年的支持。

On every list of outstanding astrophysical problems of the late twentieth century is the "solar neutrino problem," or the deficit of detected neutrinos compared to those expected from interior models of the Sun. Solar neutrinos are measured using perchloro- ethylne (cleaning fluid) in Homestake Mine in South Dakota. The chlorine atoms in this solution are converted to an argon-37 isotope by solar neutrinos and are then extracted to measure the rate of neutrino emission. The deficit in detected neutrinos was first discovered at Homestake over twenty years ago. It has led since to the construction of several other neutrino detection facilities in Russia, Japan, and Italy. This award will support the operations of the Homestake Experiment for an additional two years.