抄録
Angular distributions of α particles resulting from O16(d, α0)N14 (ground state), N14(d, α0)C12 (ground state), N14(d, α1)C12 (first excited state), C12(d, α0)B10 (ground state) and C12(d, α1)B10 (first excited state) reactions were studied, α particles from the O16(d, α0)N14, C12(d, α0)B10 and C12(d, α1)B10 reactions exhibited forward peaks and backward peaks simultaneously, while α particles from N14(d, α0)C12 reaction showed forward peaks and oscillatory behavior.
α particles leaving N14 and C12 nuclei in their T=1 state were also observed in the forward angle, and the isotopic spin conservation rule seemed to be violated.
The reaction mechanism is then discussed on the basis of the surface direct reaction, the compound nucleus formation and α particle clustering in the target nucleus. It is concluded that α clustering may play an important role in the (d, α) reaction.
