4 He( d , p α) n Reaction at E d =8.9 MeV
1977; Physical Society of Japan; Volume: 42; Issue: 3 Linguagem: Inglês
10.1143/jpsj.42.732
ISSN1347-4073
AutoresK. Sagara, Masahiro Hara, Noriyuki Takahashi, Tōru Motobayashi, Fujio Takéutchi, F. Soga, Y. Nogami,
Tópico(s)Advanced Chemical Physics Studies
ResumoAbsolute cross sections of the 4 He( d , p α) n reaction have been measured at E d =8.9 MeV in order to study the reaction mechanism at low energy. A gas target in a cell with very thin wall (0.25 mg/cm 2 ) is used to detect low energy α-particles. In the coincidence spectra, prominent peaks are observed corresponding to the strong n -α final state interaction. Shapes of the spectra are well reproduced by the simple impulse approximation and the single-level R-matrix theory, but the absolute values as well as the angular dependence of the experimental peakcross section can not be fitted by these calculations. Independence of the peakcross section from kinematical variables such as the spectator energy and the nucleon-α scattering angle indicates that effects of multiple processes in the reaction are dominant at this low energy. A simple physical picture of the processes is presented.
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