The Emission Order of Hydrogen Isotopes via Correlation Functions in 30 MeV/u Ar+Au Reactions

Abstract

The intensity interferometry is applied as a chronometer of the particle emission of hydrogen isotopes from the intermediate velocity source formed in ${}^{40}$Ar+${}^{197}$Au reactions at 30 MeV/u. The dynamic emission order of ${\tau }_{\mathrm{p}}>{\tau }_{\mathrm{d}}>{\tau }_{\mathrm{t}}$ is evidenced via the correlation functions of nonidentical particle pairs. Assuming the similar source size, the same emission order is inferred from the correlation functions of identical particle pairs, where ${\tau }_{\mathrm{p}}\approx 100fm/c$ is extracted by the fit of Koonin-Pratt equation to p-p correlation function. Transport model simulations demonstrate that the dynamic emission order of light charged particles depends on the stiffness of the nuclear symmetry energy.

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