Evaluation of tagging techniques of
compound-nuclear gamma-decay probabilities for the indirect
determination of
neutron capture cross sections, B. Goldblum, University
of
California, Berkeley,USA
− The
absolute surrogate and surrogate ratio method (SRM) were employed
to obtain the
92Mo(n,g) cross section in an equivalent neutron energy
range of 80
to 880 keV. Excited 93Mo and 95Mo nuclei
were populated
using the (d,p) reaction. Both
the
discrete and statistical tagging approaches to identify the
g-decay channel and
were examined in terms of their sensitivity to the initial angular
momentum
population distribution.The
absolute
surrogate 92Mo(n,g) cross sections disagreed in both
shape and
magnitude as compared with evaluated neutron capture data, whereas
the results
obtained using the SRM trended favorably with the evaluated
result. This work
represents the first use of the
surrogate method in the determination of neutron capture cross
sections on
spherical and quasi-spherical nuclei and provides a prescription
to extend the
SRM to a broader mass range.