Elsevier

Nuclear Physics A

Volume 515, Issue 3, 3 September 1990, Pages 525-540
Nuclear Physics A

Angular momentum transfer and energy loss in the 32S + 60,64Ni peripheral reactions at 160.5 MeV

https://doi.org/10.1016/0375-9474(90)90596-EGet rights and content

Abstract

The first two moments of the γ-ray multiplicity distribution have been measured as a function of the energy of projectile-like fragments (Z = 14−16) for the reactions 32S + 60,64Ni at 160.5 MeV lab bombarding energy. The increase of both moments with increasing total kinetic energy loss exhibits a plateau above ~15 MeV, which seems to be correlated with a shape evolution of the angular distribution taking place around the same energy. Anomalously large relative widths of the γ-multiplicity have been observed also at large energy losses. The trends of 〈M〉 and σM for small energy losses are well described within the time-dependent shell model for the nucleus-nucleus collision, while discrepancies are observed at large energy losses where features of direct and damped processes seem to coexist.

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    On leave from the Institute of Nuclear Research of Shangai, China.

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