Imprints of high-momentum nucleons in nuclei on hard photons from heavy-ion collisions near the Fermi energy

Guo, Wen-Mei; Li, Bao-An; Yong, Gao-Chan

doi:10.1103/physrevc.104.034603

Title: Imprints of high-momentum nucleons in nuclei on hard photons from heavy-ion collisions near the Fermi energy

Journal Article · 02 September 2021 · Physical Review C

DOI: https://doi.org/10.1103/physrevc.104.034603 · OSTI ID:1837885

Guo, Wen-Mei ^[1];

^[2]; Yong, Gao-Chan ^[3]

Anhui Normal Univ., Wuhu (China); Texas A&M University-Commerce
Texas A & M Univ., Commerce, TX (United States)
Chinese Academy of Sciences, Lanzhou (China)

The short-range correlation (SRC) induced by the tensor force in the isosinglet neutron-proton interaction channel leads to a high-momentum tail (HMT) in the single-nucleon momentum distributions n(k) in nuclei. Owing to the remaining uncertainties about the tensor force, the shape of the nucleon HMT may be significantly different from the dilute interacting Fermi gas model prediction n(k) ~ 1/k⁴ similar to the HMT in cold atoms near the unitary limit. Within an isospin- and momentum-dependent Boltzmann-Uehling-Uhlenbeck transport model incorporating approximately the nucleon HMT, we investigate hard photon emissions in ¹⁴N + ¹²C and ⁴⁸Ca + ¹²⁴Sn reactions at beam energies around the Fermi energy. Imprints of different shapes of the HMT on the energy spectrum, angular distribution and transverse momentum spectrum of hard photons are studied. Furthermore, while the angular distribution does not carry any information about the shape of the nucleon HMT, the energy spectra and especially the mid-rapidity transverse momentum spectra of hard photons are found to bare strong imprints of the shapes of nucleon HMTs in the two colliding nuclei.

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Research Organization:: Texas A & M Univ., Commerce, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0013702

OSTI ID:: 1837885

Journal Information:: Physical Review C, Journal Name: Physical Review C Journal Issue: 3 Vol. 104; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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