Since the end of the Cold War, the non-proliferation work on Weapons of Mass Destruction (WMD) has gradually become the first priority in the field of arms control and international security. With the unswerving effor...Since the end of the Cold War, the non-proliferation work on Weapons of Mass Destruction (WMD) has gradually become the first priority in the field of arms control and international security. With the unswerving efforts by international community, enormous progress has been made in the construction .展开更多
Nonproliferation cooperation has always been a bright spot in China-US security cooperation for over more than a decade. China and the U.S. should timely adjust the focus of their nonproliferation cooperation on a mor...Nonproliferation cooperation has always been a bright spot in China-US security cooperation for over more than a decade. China and the U.S. should timely adjust the focus of their nonproliferation cooperation on a more equal basis, expanding common interests and exploring new patterns for cooperation so as to create a model for the two countries to join hands in global governance and maintenance of regional order.展开更多
Nuclear nonproliferation is of critical importance for global security.Dangerous fissile materials including highly enriched uranium and weapons-grade plutonium are especially important to detect.Active interrogation ...Nuclear nonproliferation is of critical importance for global security.Dangerous fissile materials including highly enriched uranium and weapons-grade plutonium are especially important to detect.Active interrogation techniques may result in much better sensitivity but are difficult with conventional portal monitors that rely on detecting thermal neutrons.Also,most conventional portal monitoring systems rely on ^(3)He,which has a finite and continually decreasing supply.By designing a highly segmented array of organic scintillators,we posit that we can accurately and quickly identify fissile materials,including weapons-grade plutonium and highly enriched uranium,being smuggled.We propose a new design for a fast-neutron detector that overcomes the limitations of the current generation of portal monitors.MCNP6 simulations have been performed in conjunction with the UMPBT statistical model to determine the sensitivity limitations of the proposed detector.Results suggest that the proposed detector may be 10 times more efficient than current-generation thermal neutron detectors and may be able to positively identify a 81 mg 235U source in as little as 192 seconds utilizing active interrogation techniques.展开更多
文摘Since the end of the Cold War, the non-proliferation work on Weapons of Mass Destruction (WMD) has gradually become the first priority in the field of arms control and international security. With the unswerving efforts by international community, enormous progress has been made in the construction .
文摘Nonproliferation cooperation has always been a bright spot in China-US security cooperation for over more than a decade. China and the U.S. should timely adjust the focus of their nonproliferation cooperation on a more equal basis, expanding common interests and exploring new patterns for cooperation so as to create a model for the two countries to join hands in global governance and maintenance of regional order.
基金supported by the National Nuclear Security Administration(NNSA)through the Center for Excellence in Nuclear Training and University Based Research(CENTAUR)under Award No.DE-NA0003841by the U.S.Department of Energy,Office of Science,Office of Nuclear Physics,under Award No.DE-FG02-93ER40773the College of Science at Texas A&M University through Strategic Transformative Research Program(CoS STRP).
文摘Nuclear nonproliferation is of critical importance for global security.Dangerous fissile materials including highly enriched uranium and weapons-grade plutonium are especially important to detect.Active interrogation techniques may result in much better sensitivity but are difficult with conventional portal monitors that rely on detecting thermal neutrons.Also,most conventional portal monitoring systems rely on ^(3)He,which has a finite and continually decreasing supply.By designing a highly segmented array of organic scintillators,we posit that we can accurately and quickly identify fissile materials,including weapons-grade plutonium and highly enriched uranium,being smuggled.We propose a new design for a fast-neutron detector that overcomes the limitations of the current generation of portal monitors.MCNP6 simulations have been performed in conjunction with the UMPBT statistical model to determine the sensitivity limitations of the proposed detector.Results suggest that the proposed detector may be 10 times more efficient than current-generation thermal neutron detectors and may be able to positively identify a 81 mg 235U source in as little as 192 seconds utilizing active interrogation techniques.
