Developement of the general neutrino detector based on indium

长期以来，人们一直在努力测量来自太阳的中微子。但实际观测到的中微子只有太阳标准模型预测通量的三分之一。这个问题被称为“丢失的太阳中微子之谜”。这个问题被认为与中微子的质量有关，这是基本粒子物理学的基本问题。然而，为了明确地解决这个问题，必须测量太阳pp聚变过程中产生的低能中微子，其最高为420 KeV。因此，我们开发了铟基中微子探测器，能够探测到这种中微子。我们集中精力开发InP固体探测器和铟掺杂闪烁晶体。我们成功地制作了能够测量60 KeV< γ >射线的InP固态硬盘。我们测量了电容，损耗层的厚度以及对< α >和< γ >-射线的响应。这是世界上第一个关于InP探测器成功的报道。得到的分辨率为0.17/<平方根>E（MeV）。这不是一个足够的品质，但我们期望在未来有所改善。我们已经证明，随着晶体质量和探测器尺寸的改进，InP固体探测器将成为低能中微子探测器的一个很好的候选者。我们已经测试了几种掺杂铟的闪烁晶体。我们测量了闪烁晶体的发光度和透明度。我们无法得到在室温下具有足够发光和高透明度的晶体。然而，我们得出的结论是，如果将ni或TlI（In）冷却到液氮的温度，则可以用作检测器。

There has been a long time sffort to measure the neutrinos from the sun.But the neutrinos actually observed are only 1/3 of the predicted flux based on the standard model of the sun.This problem is called as a "Missing solar neutrino puzzle"This problem is thought to be related to the mass of the neutrinos,the fundamental problem of the elementary particle physics.However,in prder to resolve the problem unambiguously,the low energy neutrinos from the pp fusion process in the sun,which are at most 420 KeV,must be measured.Therefore We have developed indium based neutrino detectors which are able to detect such neutrinos.We have concentrated our effort to develop InP solid state detectors and indium doped scintillating crystals.We have succeeded to make InP SSD which had a ability to measure 60 KeV<gamma> rays.We have measured the capacitance,thickness od the depletion layers and the responses to the<alpha>and<gamma>-rays.This is the first report of the success of the InP detectors in the world.The resolution obtained was 0.17/<square root>E(MeV).This is not a sufficient quality,but improvement will be expected in the future.We have demonstrated that the InP solid state detector would be a good candidate for the low energy neutrino detector with a future improvement of the quality of the crystal and the size of the detector.We have tested several kinds of scintillating crystals doped with indium.We measured the luminescence and transparentness of the scintillating crystals.We could not get a crystal with sufficient luminescence at room temperature and high transparentness.However,we have come to the conclusion that InI or TlI(In)may be used as a detector if they are cooled down to the temperature of the liquid nitrogen.