Active interrogation using energetic protons Article Swipe

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shielded cable neutron fissile material nuclear physics physics proton electromagnetic shielding gamma ray delayed neutron neutron temperature computer science quantum mechanics telecommunications

C. L. Morris , K.S. Chung , Steven Greene , Gary E. Hogan , M. Makela , Fesseha Mariam , E.C. Milner , Matthew Murray , A. Saunders , Randy Spaulding , ‪Zhehui Wang , L. Waters , F. J. Wysocki ·

YOU? · · 2024 · Open Access · · OA: W1589998352

Energetic proton beams provide an attractive alternative when compared to electromagnetic and neutron beams for active interrogation of nuclear threats because they have large fission cross sections, long mean free paths and high penetration, and they can be manipulated with magnetic optics. We have measured time-dependent cross sections and neutron yields for delayed neutrons and gamma rays using 800 MeV and 4 GeV proton beams with a set of bare and shielded targets. The results show significant signals from both unshielded and shielded nuclear materials. Measurements of neutron energies yield suggest a signature unique to fissile material. Results are presented in this paper.