https://doi.org/10.1140/epja/i2019-12821-4
Regular Article - Experimental Physics
Neutron capture cross sections of 74, 76, 78, 80, 82Se
Department of Physics, Oregon State University, 97331, Corvallis, OR, USA
* e-mail: kranek@physics.oregonstate.edu
Received:
5
March
2019
Accepted:
2
July
2019
Published online:
23
August
2019
The cross sections for radiative neutron capture by the 5 stable even-mass isotopes of natural selenium have been measured by observation of the 
rays emitted by the 7 radioactive isomeric and ground states produced following neutron capture. By irradiating the Se samples in reactor sites having different compositions of thermal and epithermal neutrons, consistent values of the thermal cross sections and resonance integrals have been obtained. Systematic variations in the deduced cross sections have been minimized by observing in each sample the decays of several different Se nuclides, thus providing overlapping and redundant values for comparison. The half-life of 79mSe has been measured to be 3.884(9)h. Ratios of cross sections of isomeric and ground states in 77, 79, 81, 83Se are compared with a statistical model.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2019
