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

Indiana University, Bloomington IN

Investigators

Abstract

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 of this interaction between neutrons and protons is not known, and current results from different experiment are contradictory. However, the weak interaction is known to possess the unique property of causing reactions that look different in a mirror. We intend to construct a detector which can sense part-per-billion mirror asymmetries in reactions involving neutrons and protons that produce gamma rays. This detector will first be used in an upcoming experiment at the LANSCE pulsed neutron source at Los Alamos which will detect the mirror asymmetry in neutron capture on protons. It will be designed and constructed at the Indiana University Cyclotron Facility.