TY - JOUR
T1 - NMIS plus gamma spectroscopy for attributes of HEU, PU and HE detection
AU - Mihalczo, J. T.
AU - Mattingly, J. K.
AU - Neal, J. S.
AU - Mullens, J. A.
PY - 2004/1
Y1 - 2004/1
N2 - A combined nuclear materials identification system-gamma ray spectrometry system can be used passively to obtain the following attributes of Pu: presence, fissile mass, 240/239 ratio and metal versus oxide. This system can also be used with a small, portable, DT neutron generator to measure the attributes of highly enriched uranium (HEU): presence, fissile mass, enrichment, metal versus oxide; and detect the presence of high explosives (HE). For the passive system, time-dependent coincidence distributions can be used for the presence, fissile mass, metal versus oxide for Pu, 240/239 ratio, and gamma ray spectrometry can also be used for 240/239 ratio and presence, allowing presence and 240/239 ratio to be confirmed by two methods. For the active system with a DT neutron generator, all relevant attributes for both Pu and HEU can be determined from various features of the time-dependent coincidence distribution measurements. Active gamma ray spectrometry would determine the presence of HE. The various features of time-dependent coincidence distributions and gamma ray spectrometry that determine these attributes are discussed with some examples from previous determinations.
AB - A combined nuclear materials identification system-gamma ray spectrometry system can be used passively to obtain the following attributes of Pu: presence, fissile mass, 240/239 ratio and metal versus oxide. This system can also be used with a small, portable, DT neutron generator to measure the attributes of highly enriched uranium (HEU): presence, fissile mass, enrichment, metal versus oxide; and detect the presence of high explosives (HE). For the passive system, time-dependent coincidence distributions can be used for the presence, fissile mass, metal versus oxide for Pu, 240/239 ratio, and gamma ray spectrometry can also be used for 240/239 ratio and presence, allowing presence and 240/239 ratio to be confirmed by two methods. For the active system with a DT neutron generator, all relevant attributes for both Pu and HEU can be determined from various features of the time-dependent coincidence distribution measurements. Active gamma ray spectrometry would determine the presence of HE. The various features of time-dependent coincidence distributions and gamma ray spectrometry that determine these attributes are discussed with some examples from previous determinations.
UR - http://www.scopus.com/inward/record.url?scp=0242494090&partnerID=8YFLogxK
U2 - 10.1016/S0168-583X(03)01651-3
DO - 10.1016/S0168-583X(03)01651-3
M3 - Conference article
AN - SCOPUS:0242494090
SN - 0168-583X
VL - 213
SP - 378
EP - 384
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
T2 - 5th Topical Meeting on Industrial Radiation and Radioisotope (IRRMA-V)
Y2 - 9 June 2002 through 14 June 2002
ER -