J. Phys. Soc. Jpn. 48, pp. 1797-1803 (1980) [7 Pages]

Excited States of 4He Observed in the 4He(α, αd)2H Reaction at 119 MeV

+ Affiliations
1Institute for Chemical Research, Kyoto University2Kyoto University of Education3Faculty of Science, Tokyo Institute of Technology4Himeji Institute of Technology5Faculty of Science, Nara Women's University

Kinematically complete experiments were made for the 4 He(α, αd) 2 H reaction at an incident energy of 119 MeV to investigate excited states of 4 He. In the coincident energy spectra, bumps were observed at the energies corresponding to the excitations of 25.5 MeV, 27.8 MeV, 29.7 MeV, 31.7 MeV and 35.3 MeV. In the excitation range from 28 MeV to 40 MeV, the angular correlations were fitted with the Legendre polynomials and compared with theoretical distributions based on two-step reaction mechanism. For the last three bumps mentioned above, the spins and parities are assigned as J π =2 + , 2 + (1 - ) and 2 + , respectively.

©1980 The Physical Society of Japan