Modern Techniques for Neutron and Gamma-ray Spectrometry and Imaging

The NASA Postdoctoral Program (NPP) offers unique research opportunities to highly-talented scientists to engage in ongoing NASA research projects. This specific opportunity is in the Energetic Particle Lab (EPL) in the Heliophysics Science Division, focusing on modernizing neutron and gamma-ray spectrometers. These instruments are vital for Heliophysics, Planetary, and Astrophysics research. The research involves building instruments to measure charged and neutral particles using solid state detectors and modern scintillators with silicon photomultipliers (SiPM). A particular emphasis is on developing spectrometers for the Artemis program to conduct science while safeguarding astronauts against radiation exposure during deep space travel and lunar surface expeditions. The current work focuses on reducing the power, mass, and volume of neutron/gamma-ray instrumentation and expanding readout to more robust systems including rad-hard SiPMs and novel multi-channel ASICs. The research also explores modern scintillators and solid-state options for detecting neutrons across the entire energy spectrum from thermal to fast neutrons, and simulating the response and environment applicable for such instrumentation. These one- to three-year competitive fellowships are designed to advance NASA's missions in space science, Earth science, aeronautics, space operations, exploration systems, and astrobiology.