Isospin effects on particle emission time sequence in $E∕A=61\mathrm{MeV}$ ${}^{36}\mathrm{Ar}+{}^{112,124}\mathrm{Sn}$ reactions

The emission time sequence of neutrons, protons, and deuterons is deduced from velocity-gated two-particle correlation functions in $E∕A=61\mathrm{MeV}$ ${}^{36}\mathrm{Ar}+{}^{112,124}\mathrm{Sn}$ reactions. A dependence of the emission sequence on the isospin of the emitting source is observed.

Figure 1

For the $E∕A=61\mathrm{MeV}$ ${}^{36}\mathrm{Ar}+{}^{124}\mathrm{Sn}$ reaction, distributions of total momentum of the particle pairs calculated in the TLS frame $(v_s\sim 0.02c)$, left panels, and in the IS frame $(v_s\sim 0.18c)$, right panels, for $np$ pairs [panels (a,b)], $nd$ pairs [panels (c,d)], and $pd$ pairs [panels (e,f)]. The hatched areas represent the total momentum gates applied in the analysis.

Figure 2

Neutron-proton velocity-gated correlation functions and their ratio deduced from $E∕A=61\mathrm{MeV}{}^{36}\mathrm{Ar}+{}^{112}\mathrm{Sn}$ (left column) and ${}^{36}\mathrm{Ar}+{}^{124}\mathrm{Sn}$ (right column) reactions.

Figure 3

Neutron-deuteron velocity-gated correlation functions and their ratio deduced from $E∕A=61\mathrm{MeV}{}^{36}\mathrm{Ar}+{}^{112}\mathrm{Sn}$ (left column) and ${}^{36}\mathrm{Ar}+{}^{124}\mathrm{Sn}$ (right column) reactions.

Figure 4

Proton-deuteron velocity-gated correlation functions and their ratio deduced from $E∕A=61\mathrm{MeV}$ ${}^{36}\mathrm{Ar}+{}^{112}\mathrm{Sn}$ (left column) and ${}^{36}\mathrm{Ar}+{}^{124}\mathrm{Sn}$ (right column) reactions.