Development of a Current-Mode CsI Gamma Detector Array for Precision Weak Interaction Experiments

除了将中子和质子束缚在原子核中的强相互作用外，还有一种“弱”相互作用。中子和质子之间这种相互作用的确切强度尚不清楚，目前不同实验的结果也相互矛盾。然而，弱相互作用已知具有引起在镜子中看起来不同的反应的独特性质。我们打算建造一个探测器，它可以在中子和质子产生伽马射线的反应中探测到十亿分之一的镜像不对称性。该探测器将首先用于即将在洛斯阿拉莫斯LANSCE脉冲中子源进行的实验，该实验将检测质子中子捕获的镜像不对称性。它将在印第安纳大学回旋加速器设施设计和建造。

In addition to the strong interaction between neutrons and protons which binds them in the nucleus, there is also a "weak" interaction. The precise strength ofthis interaction between neutrons and protons is not known, andcurrent results from different experiment are contradictory.However, the weak interaction is known to possess the uniqueproperty of causing reactions that look different in a mirror.We intend to construct a detector which can sensepart-per-billion mirror asymmetries in reactions involving neutrons and protons that produce gamma rays. This detectorwill first be used in an upcoming experiment at the LANSCE pulsed neutronsource at Los Alamos which will detect the mirror asymmetry in neutron captureon protons. It will be designed and constructed at the Indiana University Cyclotron Facility.