Solid State Neutron Detector

In order to enhance radiation sensing and detection for nonproliferation applications, the DOE is seeking a neutron detector with 100% rejection of gamma rays ¿ which would greatly reduce false positives, a major issue with neutron detectors presently in use. This project will develop low-cost, solid-state neutron detection arrays based on static random access memory (SRAM). (SRAM, which requires high Linear Energy Transfer (LET) to register a count, will only respond to neutrons.) The detectors will have on-board processing electronics, 10 µm spatial resolution, a small footprint (a few mm by a few mm), and low cost (base-line models in large quantities could sell for less than $50). In Phase I, a bonded wafer with a B-10 ¿built-in¿ neutron converter will be developed. The bonded wafer will be used in Phase II in the fabrication of the neutron detectors. Commercial Applications and other Benefits as described by the awardee: Key applications of the technology would include: (1) a miniature neutron detector, which could be incorporated in cell phones, wristwatches, and other handheld equipment; (2) detectors to cover large areas for surveillance and monitoring of neutron sources, nuclear waste, and unauthorized movement of nuclear materials; and (3) neutron detection arrays for applications requiring very high resolution (10 micron), such as neutron radiography.