The Thermal-Neutron Capture Cross Section of 147Sm

L. Forman; F. A. White

doi:dx.doi.org/10.13182/NSE67-A18677

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Home / Publications / Journals / Nuclear Science and Engineering / Volume 28 / Number 1

The Thermal-Neutron Capture Cross Section of 147Sm

L. Forman, F. A. White

Nuclear Science and Engineering / Volume 28 / Number 1 / April 1967 / Pages 139-143

Technical Paper / dx.doi.org/10.13182/NSE67-A18677

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The thermal-neutron capture cross section of ¹⁴⁷Sm has been measured by the mass spectrometric determination of the number of ¹⁴⁸Sm atoms formed by neutron capture. Samples of high isotopic purity were irradiated in a well-thermalized neutron spectrum for which the time-integrated neutron flux and effective neutron temperature were monitored by the burnup in ¹⁴⁹Sm and ¹⁵⁷Gd. A thermal-neutron capture cross section value of 75 ± 11 b was obtained from a post-irradiation ¹⁴⁸Sm/ ¹⁴⁷Sm ratio of 0.00025 ± 8%, at an effective neutron temperature of 127 ± 13°C.