Intermediate mass fragments emission in the reaction 96 MeVF19onC

Study of the fusion-fission process in the 35Cl +24Mg reaction

“…It has been shown for example that entrance-channel effects do not play a significant role in the binary-decay processes of the 47 [7]) at comparable excitation energies and angular momenta. Similar conclusions can be reached for the neighbouring 48 Cr di-nuclear system as formed also by three different entrance channels [8,11] and even for lighter systems such as 27 Al [9] or 31 P [13]. This demonstrates that in each case the CN is formed after a complete equilibration of the mass-asymmetry and the shape degrees of freedom.…”

“…Further, transition-state model [1,4] calculations describe well the properties of the binary-decay channels and thus suggest a FF origin. The occurrence of FF rather than orbiting in certain light-mass systems has been the subject of large number of discussions [1,[4][5][6][7]13,14]. These have led, in most cases, to the conclusion [1] that FF has to be taken into account when exploring the limitations of the complete fusion (CF) process at large angular momenta and high excitation energies.…”

Characterization of fragment emission inNe20(7–10 MeV/nucleon)+C12Dey1, Bhattacharya2, Bhattacharya3 et al. 2007Phys. Rev. CSelf Cite19020View full textAdd to dashboardCite

“…This indicates the presence of other type of reaction process, namely orbiting. In contrast, the study of the nearby system 19 F (96 MeV) + 12 C clearly showed that the fragments are emitted in the fusion-fission process [7]. Low values of NOC [29] obtained for 20 Ne + 12 C system as compared to the same obtained for 19 F + 12 C system also confirms the conjecture of survival of orbiting in 20 Ne + 12 C system at higher excitations.…”

“…This very deep minimum (NOC = 4.5) explains: (i) why resonant structures have been observed to be significant in 20 Ne + 12 C [27,28] and, (ii) why the orbiting yields observed for C fragments are much larger than the CASCADE predictions. The comparison with 19 F + 12 C is instructive at E * = 60 MeV [7] (the corresponding value of the yield of fragment C for 20 Ne + 12 C, as given in Table I, has been extracted from Fig. 7 to permit a direct comparison with 19 F + 12 C).…”

“…Several experiments have been done in recent years to understand the mechanism of complex fragment emission in low-energy (E lab < ∼ 10 MeV/nucleon) light heavy-ion (A projectile + A target < ∼ 60) reactions [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17]. The origin of these fragments extends from quasi-elastic (QE)/ projectile breakup [2,3], deep-inelastic (DI) transfer and orbiting [4,6,12,13,14,15,16], to fusion-fission (FF) [18,19,20,21,22,23] processes; and in some cases the structure of the nuclei has been found to play an important role.…”