149Sm(n,alpha)146Nd cross sections in the MeV energy region

We have measured the {sup 149}Sm(n,{alpha}){sup 146}Nd cross section at 4.5, 5.0, 5.5, 6.0, and 6.5 MeV. Measurements were performed at the 4.5 MV Van de Graaff accelerator of Peking University with monoenergetic neutrons produced via the {sup 2}H(d,n){sup 3}He reaction using a deuterium gas target....

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2011-01, Vol.107 (25)
Main Authors: Zhang, Guohui, Gledenov, Yu. M., Khuukhenkhuu, G, Sedysheva, M. V., Szalanski, P., Koehler, Paul Edward, Voronov, Yu. N., Liu, Jiaming, Liu, Xiang, Han, Jinhua, Chen, Jinxiang
Format: Article
Language:English
Subjects:
ALPHA PARTICLES
CROSS SECTIONS
DEUTERIUM
ENERGY DEPENDENCE
FISSION CHAMBERS
IONIZATION CHAMBERS
LONG COUNTERS
NEUTRON FLUX
NEUTRONS
PARTICLE ACCELERATORS
VAN DE GRAAFF ACCELERATORS
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have measured the {sup 149}Sm(n,{alpha}){sup 146}Nd cross section at 4.5, 5.0, 5.5, 6.0, and 6.5 MeV. Measurements were performed at the 4.5 MV Van de Graaff accelerator of Peking University with monoenergetic neutrons produced via the {sup 2}H(d,n){sup 3}He reaction using a deuterium gas target. Alpha particles were detected with a double-section gridded ionization chamber having two back-to-back {sup 149}Sm{sub 2}O{sub 3} samples attached to the common cathode. Absolute neutron flux was measured using a small {sup 238}U fission chamber and monitored by a BF{sub 3} long counter. These are the first reported cross sections for this reaction at these energies, except at 6.0 eV, where our new data are in good agreement with our earlier result. The present results help to much better constrain the {sup 149}Sm(n,{alpha}){sup 146}Nd cross section in a region where its energy dependence is changing fairly rapidly and there are large differences between evaluated nuclear data libraries.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.107.252502