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Chlorine-37, or , is one of the stable isotopes of chlorine, the other being chlorine-35 (). Its nucleus contains 17 protons and 20 neutrons for a total of 37 nucleons. Chlorine-37 accounts for 24.23% of natural chlorine, chlorine-35 accounting for 75.77%, giving chlorine atoms in bulk an apparent atomic weight of . Remarkably, the Solar neutrinos were discovered by an experiment using a radiochemical method based on Chlorine-37 transmutation.〔 〕 ==Neutrino detection== (詳細はneutrino detection is based on inverse electron capture triggered by the absorption of an electron neutrino.〔 〕 Chlorine-37 transmutes into Argon-37 via the reaction〔 〕 : + → + . Argon-37 then de-excites itself via electron capture (half-life = 35 d) into Chlorine-37 via the reaction : + → + . These last reactions involve Auger electrons of specific energies.〔〔 〕 The detection of these electrons confirms that a neutrino event took place. Detection methods involve several hundred thousand liters of carbon tetrachloride (CCl4) or tetrachloroethylene (C2Cl4) stored in underground tanks.〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Chlorine-37」の詳細全文を読む スポンサード リンク
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