Speaker
Description
The isospin-dependent equation of state of nuclear matter, i.e. symmetry energy plays an important role in the study of nuclear physics and astrophysics. The calculation of transport model has shown the symmetry energy affects significantly the nucleon emission times in HIC leading to significant variation of two-nucleon correlation functions.
Recent years, a compact spectrometer for heavy ion experiment（CSHINE）has been built, which has the ability to measure light charged particles, and the two charged particle correlation functions have been obtained. In 2024, a neutron array with 212ps time resolution has been mounted on CSHINE[ Nucl. Inst. Meth. A 1070(2025) 170055], and the neutron-neutron correlation function is obtained in 124Sn+124Sn at 25MeV/u. A novel method to subtract the crosstalk effect is used to avoid the distortion on the n-n correlation function. Finally, the scattering length, effective range, source size and timescale are obtained by Lednicky-Lyuboshitz approach. The interaction parameters are consistent with the low energy scattering experiment, demonstrating that femtoscopic correlation function method in heavy ion reactions provides an valid means to study the n-n strong interaction and to further shed light on the charge symmetry breaking of nuclear force[Phys. Rev. Lett. 134, 222301 (2025)].
| Presentation Style | Oral Presentation |
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