Time Reversal, Neutron Structure, and Neutron Beta Decay

将在NIST反应堆冷中子设施进行一项实验，旨在改善粒子相互作用时间反演不变性的现有限制。 该实验是基于极化中子的β衰变。 时间反演违反是一个非常重要的话题，目前有很大的兴趣，因为它的影响，中央，宇宙如何演变到包含一个巨大的优势，对反物质的问题。 第二个实验将在洛斯阿拉莫斯进行，使用冷的极化中子束研究中子和质子在捕获过程中产生氘的弱相互作用。 这种测量将限制核子-核子力中违反宇称的部分。 此外，该装置还将用于中子-电子散射实验，以测量中子电荷半径。 其他发展工作将在与产生极化中子和原子核，包括放射性物质有关的激光光学泵浦方面进行。 研究生和博士后是拟议的研究活动的组成部分。

An experiment will be carried out at the NIST reactor cold neutron facility aimed at improving the current limits on time reversal invariance of particle interactions. The experiment is based on the beta-decay of polarized neutrons. Time reversal violation is a very important topic and of great current interest because it impacts, centrally, the question of how the universe evolved to contain a huge preponderance of matter over anti-matter. A second experiment will be carried out at Los Alamos using a cold, polarized neutron beam to study the weak interaction between neutrons and protons in the capture process leading to deuterium. This measurement will place limits on the parity violating parts of the nucleon-nucleon force. In addition, this apparatus will be used in a neutron-electron scattering experiment designed to measure the neutron charge radius. Other development work will be carried out in laser optical pumping as connected with the production of polarized neutrons and nuclei, including radioactive species. Graduate student and postdocs are integral to the proposed research activities.