Entrance channel effect on the pre-scission time of binary decay for the medium mass nuclei (Mass ∼ 110)

Angular momentum effect in prescission particle multiplicities for a light system by diffusion model

“…The reason is simply that in [24] the fission rate is set to be zero in fission delay time, but in our calculation the fission rate increases steadily from zero to the stationary value in this transient process. The same reason can be used to explain the difference of our calculation and [1] as shown in Fig. 5.…”

“…Al system the partial wave distribution of 65< L < 83h for binary decay [1]. Figure 2 shows with decreasing angular momentum, the prescission particle multiplicity increase.…”

“…We have noticed that for three reaction systems in [1], i.e., 10.6 MeV/nucleon 84 Kr + 27 Al, 10 MeV/nucleon 58 Ni + 56 Fe and 18 MeV/nucleon 16 O + 109 Ag, which have similar mass and excitation energy, it was found that the prescission time and the prescission particle multiplicity have strong entrance channel dependence. These three reaction systems have different mass asymmetry and the fission happens in different angular momentum range.…”

“…We have noticed that for 111 In nuclei, the multiplicity of the charged particles emission is very high, which indicates that if only considering neutron emission in the fission process is not enough to describe well the competition between fission and particle emission for light nucleus fission. For 10.6 111 In, experiments have been already carried out and its data analysis has given the prescission proton and α particle multiplicity [1,[24][25][26], so in the following calculation, we take it as an example.…”

“…Evidently λ i,0 =0 (i=n,p,α), as the mother nucleus has no source. The solution of the coupled equation (1) and (2) is the same as that in [10], where only neutron emission is considered.…”