Investigation of the Outgoing Tritons Angular Distribution in the {sup 9}Be(n,t{sub 1}{gamma}){sup 7}Li Reaction at 14.9 MeV by the Line Shape Analysis of the 0.4776-MeV Gamma Transition

Doppler broadening line shapes of 0.4776-MeV gamma transition of {sup 7}Li* populated in the {sup 9}Be(n,t{sub 1}{gamma}) reaction at 14.9 MeV have been analyzed at 40-, 55-, and 90-deg detector positions in respect to the beam axis for the evaluation of the angular distribution W({theta}) of outgoi...

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Published inNuclear science and engineering Vol. 146; no. 2
Main Authors Zhou Hongyu, Wang Ping, Song Hai, Wu Fucai, Deng Fuguo, Hua Ming, Yan Yiming, Pasternak, A.A.
Format Journal Article
LanguageEnglish
Published United States 15.02.2004
Subjects
ANGULAR DISTRIBUTION
BERYLLIUM 10
BERYLLIUM 9
DOPPLER BROADENING
EXCITED STATES
LEGENDRE POLYNOMIALS
LITHIUM 7
NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEAR REACTIONS
SHAPE
TRITONS
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Summary:Doppler broadening line shapes of 0.4776-MeV gamma transition of {sup 7}Li* populated in the {sup 9}Be(n,t{sub 1}{gamma}) reaction at 14.9 MeV have been analyzed at 40-, 55-, and 90-deg detector positions in respect to the beam axis for the evaluation of the angular distribution W({theta}) of outgoing tritons (t{sub 1}) after the population of first {sup 7}Li excited state. A nonsymmetrical shape of the W({theta}) dependence with the Legendre polynomial coefficients A{sub 1} = 0.31 {+-} 0.06 and A{sub 2} = 0.23 {+-} 0.06 has been found. That fact does not support the belief in the simple nuclear reaction mechanism through the single isolated level of {sup 10}Be compound. Obtained data are compared with other available experimental results.
ISSN:0029-5639
1943-748X
DOI:10.13182/NSE04-A2406