Time scales for binary processes from light heavy-ion reactions

Suaide, Alexandre Alarcon Do Passo; Added, N.; Aïssaoui, Nadia; Alonso, E E; Cárdenas, W. H. Z.; Fujii, Ryohei; Moura, M. M. de; Munhoz, M. G.; Souza, F. A. de; Szanto, E.M.; Toledo, A. Szanto de; Carlin, N.; Papa, M.

doi:10.1103/physrevc.66.014607

Cited by 5 publications

(1 citation statement)

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“…Several experimental studies have been made in the recent years to understand the reaction mechanism of fragment emission in light heavy ion collisions [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] at low bombarding energies ( < ∼ 10 MeV/nucleon). The fragments (mostly binary in nature at these energies) are emitted with different degree of dissipation of the entrance channel kinetic energy between the two colliding ions -ranging from quasi elastic to deep inelastic (DI) to the fully relaxed fusionfission (FF) processes.…”

Section: Introductionmentioning

confidence: 99%

Dissipation of angular momentum in light heavy-ion collision

Bhattacharya¹,

Bhattacharya²,

Bhattacharjee³

et al. 2004

Phys. Rev. C

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The inclusive energy distributions of fragments ( 4≤Z≤7) emitted in the reactions 16 O (116 MeV) + 27 Al, 28 Si, 20 Ne (145 MeV) + 27 Al, 59 Co have been measured in the angular range θ lab = 10 • -65 • . The respective fusion-fission and deep inelastic contributions have been decomposed from the experimental fragment energy spectra. The angular mometum dissipations in fully damped deep inelastic collisions have been estimated assming exit channel configuration similar to those for fusion-fission process. It has been found that, the angular momentum dissipations are more than those predicted by the empirical sticking limit in all cases. The deviation is found to increase with increasing charge transfer (lighter fragments). Qualitatively, this may be due to stronger friction in the exit channel. Moreover, for the heavier system 20 Ne + 59 Co, the overall magnitude of deviation is less as compared to those for the lighter systems, i.e., 16 O + 27 Al, 28 Si, 20 Ne + 27 Al. This may be due to lesser overlap in time scales of fusion and deep inelastic time scales for heavier systems.

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