Interaction times in the19F+63Cu dissipative heavy ion reaction

Abstract

Coherence energies extracted from excitation functions and angular distributions for the fragments emitted in the a 9 F _}_ 63Cu reaction, measured in the range 01a b = l0 ~ to 120 ~ at incident energies between 100 to 108 MeV (lab.), were compared to the Kun model of dissipative collisions. An overall agreement was found for the angular distributions at forward angles. The general behavior of coherence energies was also properly described and interaction times were deduced.

Competition between the fusion-fission and deep-inelastic orbiting mechanisms in the35Cl +12C reaction

“…The fall-offs of the yields at larger scattering angles result from inverted kinematics effects near the limiting angles. The time scales of dissipative processes have been estimated in both lighter [52] and heavier [53] systems ranging from 1.10 -2~ to 5.10-21 S close to what may be deduced from our angular distributions. [46].…”

Nonstatistical fluctuations for deep inelastic processes inAl27+Al27Berceanu1, Dūma2, Moisă3 et al. 2006Phys. Rev. C1020View full textAdd to dashboardCite

“…Despite the expectation that the contribution of a large number of microchannels to the measured cross section should attenuate the fluctuation amplitude in the EF of the dissipative heavy-ion collisions (DHIC), the fluctuations have been observed and analyzed in EFs for other lightand medium-mass systems: 19 F+ 89 Y [6], 28 Si+ 48 Ti [7,8], 19 F+ 63 Cu [9], 28 Si+ 28 Si [10], 19 F+ 51 V [11]. An explanation of the persistence of the fluctuations in the EFs of DHIC is given in the framework of the partial overlapping molecular level model (POMLM) introducing, in addition to the partial coherence, the hypothesis that the DNS is excited in the low-density region of molecular levels [12,13].…”