Neutron Scattering Cross Section Measurements for 169Tm via the (n,n′) Technique.

Autor: Alimeti, Afrim, Kegel, Gunter H. R., Egan, James J., DeSimone, David J., McKittrick, Thomas M., Chuncheng Ji, Tremblay, Steven E., Roldan, Carlos, Xudong Chen, Kim, Don S.
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Zdroj: AIP Conference Proceedings; 2005, Vol. 769 Issue 1, p1054-1057, 4p
Abstrakt: The neutron physics group at the University of Massachusetts Lowell (UML) has been involved in a program of scattering cross-section measurements for highly deformed nuclei such as 159Tb, 169Tm, 232Th, 235U, 238U, and 239Pu. Ko et al. have reported neutron inelastic scattering data from 169Tm for states above 100 keV via the (n,n′γ) reaction at incident energies in the 0.2 MeV to 1.0 MeV range. In the present research, in which the time-of-flight method was employed, direct (n,n′) measurements of neutrons scattered from 169Tm in the 0.2 to 1.0 MeV range were taken. It requires that our 5.5-MeV Van de Graaff accelerator be operated in the pulsed and bunched beam mode producing subnanosecond pulses at a 5-MHz repetition frequency. Neutrons are produced by the 7Li(p,n)7Be reaction using a thin metallic elemental lithium target. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]
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