Physics Letters B (Mar 2024)

Probing high-momentum component in nucleon momentum distribution by neutron-proton bremsstrahlung γ-rays in heavy ion reactions

  • Yuhao Qin,
  • Qinglin Niu,
  • Dong Guo,
  • Sheng Xiao,
  • Baiting Tian,
  • Yijie Wang,
  • Zhi Qin,
  • Xinyue Diao,
  • Fenhai Guan,
  • Dawei Si,
  • Boyuan Zhang,
  • Yaopeng Zhang,
  • Xianglun Wei,
  • Herun Yang,
  • Peng Ma,
  • Haichuan Zou,
  • Tianli Qiu,
  • Xinjie Huang,
  • Rongjiang Hu,
  • Limin Duan,
  • Hooi Jin Ong,
  • Yanyun Yang,
  • Shiwei Xu,
  • Kang Wang,
  • Zhen Bai,
  • Junbing Ma,
  • Fangfang Duan,
  • Guo Yang,
  • Qiang Hu,
  • Hongwei Wang,
  • Baohua Sun,
  • Sergei P. Maydanyuk,
  • Chang Xu,
  • Zhigang Xiao

Journal volume & issue
Vol. 850
p. 138514

Abstract

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The high momentum tail (HMT) of nucleons, as a signature of the short-range correlations in nuclei, has been investigated by the high-energy bremsstrahlung γ rays produced in 86Kr+124Sn at 25 MeV/nucleon. The energetic photons are measured by a CsI(Tl) hodoscope mounted on the spectrometer CSHINE. The energy spectrum ≥35 MeV can be reproduced by the Isospin- and Momentum-Dependent Boltzmann-Uehling-Uhlenbeck model calculations incorporating the photon production channel from np process in which the HMTs of nucleons is considered. A non-zero HMT ratio of about 15% is favored by the data. The effect of the capture channel np→dγ is demonstrated.