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Measurement of the half-life of 95mTc and the 96Ru (n, x) 95mTc reaction cross-section induced by D–T neutron with covariance analysis
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Measurement of the half-life of 95mTc and the 96Ru (n, x) 95mTc reaction cross-section induced by D–T neutron with covariance analysis
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Journal Article
Measurement of the half-life of 95mTc and the 96Ru (n, x) 95mTc reaction cross-section induced by D–T neutron with covariance analysis
2022
Overview
The half-life of
95m
Tc and the cross-sections of the
96
Ru (
n, x
)
95m
Tc reaction induced by D–T neutrons were measured through the neutron activation technique in combination with off-line γ-ray spectrometry. The neutron beam was generated from the T (
d, n
)
4
He reaction using the K-400 neutron generator at the Chinese Academy of Engineering Physics (CAEP). Through exponential function fitting and a detailed discussion of the uncertainty evaluation, the measured half-life of
95m
Tc was 61.88 ± 0.22 days, which uncertainty is reduced greatly compared with the currently recommended value. Based on the determination of the
95m
Tc half-life, the cross-sections of
96
Ru (
n, x
)
95m
Tc reaction at the 13.85 ± 0.2, 14.30 ± 0.2 and 14.72 ± 0.2 MeV neutron energies were measured relative to the
93
Nb (
n, 2n
)
92m
Nb monitor reaction. Considering the correlations between different attributes, detailed uncertainty propagation was performed by the covariance analysis and the cross-sections were reported with their uncertainties and correlation matrix. Then, experimentally determined cross-sections were analyzed by comparing with the literature data available in the EXFOR database and theoretically calculated values using the TALYS-1.95 and EMPIRE-3.2.3 codes. The accuracy of current experimental results with the thorough uncertainties and covariance information is greatly improved, which is critical for verifying the reliability of the theoretical model and improving the quality of the nuclear database.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V
Subject
