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

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 st...

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Bibliographic Details
Published in:AIP conference proceedings 2005-05, Vol.769 (1), p.1054-1057
Main Authors: Alimeti, Afrim, Kegel, Gunter H R, Egan, James J, Desimone, David J, McKittrick, Thomas M, Ji, Chuncheng, Tremblay, Steven E, Roldan, Carlos, Chen, Xudong, Kim, Don S
Format: Article
Language:English
Subjects:
BERYLLIUM 7
CROSS SECTIONS
DEFORMED NUCLEI
INELASTIC SCATTERING
KEV RANGE
LITHIUM 7
MEV RANGE
MHZ RANGE
NEUTRON REACTIONS
NEUTRONS
NUCLEAR PHYSICS AND RADIATION PHYSICS
PLUTONIUM 239
TERBIUM 159
THORIUM 232
THULIUM 169
TIME-OF-FLIGHT METHOD
URANIUM 235
URANIUM 238
VAN DE GRAAFF ACCELERATORS
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Summary: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) 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.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.1945188