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Nuclear News 40 Under 40 discuss the future of nuclear
Seven members of the inaugural Nuclear News 40 Under 40 came together on March 4 to discuss the current state of nuclear energy and what the future might hold for science, industry, and the public in terms of nuclear development.
To hear more insights from this talented group of young professionals, watch the “40 Under 40 Roundtable: Perspectives from Nuclear’s Rising Stars” on the ANS website.
L. R. Fawcett, Jr., A. Keith Furr, J. G. Lindsay
Nuclear Science and Engineering | Volume 49 | Number 3 | November 1972 | Pages 317-329
Technical Paper | doi.org/10.13182/NSE72-A22545
Articles are hosted by Taylor and Francis Online.
Neutron capture cross sections for 154Sm, 160Gd, 164Dy, and 165Ho (ground state) have been investigated in the energy range from 5 to 160 keV. Capture cross section data in this energy region that are currently available for 165 Ho varies by approximately a factor of two between different workers and for 154Sm, 160Gd, and 164Dy little or no previously published data are available in this energy range. The present work represents an attempt to remove some of the uncertainty in the case of 165 Ho and to provide original data for the other three isotopes over the 5 to 160 keV region. This work was done by activation of metal samples of the above mentioned rare earths and counting the decay products with a well type plastic scintillator. Samples were activated by neutrons generated by the 7Li(p,n)7 Be reaction with the samples being placed at 90 deg with respect to the neutron target. The 0.820 b capture cross section of 127I at 25 keV was used as the standard for normalization along with the thermal neutron capture cross sections of the isotopes. From the experimental cross section curves the γ-ray strength functions, the s-wave neutron strength functions, and the p-wave neutron strength functions were determined. These parameters are the first to be determined for samarium and dysprosium over an energy region this broad while for gadolinium, only one other comparable set exists.