TY - JOUR
T1 - Rapid determination of uranium and plutonium content in mixtures through measurement of the intensity-time curve of delayed neutrons
AU - Li, X.
AU - Henkelmann, R.
AU - Baumgärtner, F.
PY - 2004/1
Y1 - 2004/1
N2 - The delayed neutron emission of fissile isotopes after irradiation can be described by the six-groups theory. Due to the different half-lives and yields of the fission fragments, the intensity-time curve of delayed neutrons has an individual shape for different fissile isotopes. According to this characteristic, a new rapid analysis method has been developed to determine the concentration of different isotopes in a mixture, such as 235U and 239Pu, without any chemical separation. The intensity-time curve of delayed neutrons is measured by using the multichannel scanning (MCS) method with five 3He-detectors installed on a fast transfer system at the research reactor Munich (FRM). This method was validated by about 200 measurements with different isotope contents even below the microgram region.
AB - The delayed neutron emission of fissile isotopes after irradiation can be described by the six-groups theory. Due to the different half-lives and yields of the fission fragments, the intensity-time curve of delayed neutrons has an individual shape for different fissile isotopes. According to this characteristic, a new rapid analysis method has been developed to determine the concentration of different isotopes in a mixture, such as 235U and 239Pu, without any chemical separation. The intensity-time curve of delayed neutrons is measured by using the multichannel scanning (MCS) method with five 3He-detectors installed on a fast transfer system at the research reactor Munich (FRM). This method was validated by about 200 measurements with different isotope contents even below the microgram region.
KW - Composition analysis
KW - Delayed neutron
KW - Fission material
UR - http://www.scopus.com/inward/record.url?scp=0346339659&partnerID=8YFLogxK
U2 - 10.1016/S0168-583X(03)01822-6
DO - 10.1016/S0168-583X(03)01822-6
M3 - Article
AN - SCOPUS:0346339659
SN - 0168-583X
VL - 215
SP - 246
EP - 251
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
IS - 1-2
ER -