Fluctuations in the excitation functions of dissipative collisions induced on the27Al+27Alsystem in the laboratory energy range 114.2–123 Me

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

“…A reduction factor in errors because of the FRD of ≈1.7 is obtained in the present data relative to Ref. [13]. The value obtained in the present analysis and the one previously published for 19 F+ 27 Al are much larger than those estimated with the empirical formula [25]:…”

“…= 58-60.9 MeV) in Ref. [13]. As it was mentioned above the error on the value is mainly because of FRD error, which is ∼(n) 1/2 , where n is the number of the uncorrelated experimental points.…”

“…This possibility was already evidenced in connection with Ericson fluctuations [29]. For DHIC a relationship between V = [C(0)] 1/2 and the level density in the framework of POMLM [13] was obtained:…”

“…The level density for the systems 28 Si+ 28 Si and 27 Al+ 27 Al was obtained in Refs. [10,13] using Eq. (2).…”

“…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]. The hypothesis is based on the observation that, at the measured incident energies, the intrinsic excitation energy of the composite system is a few tens of MeV above the yrast line where the level density is still expected to be low.…”