Determination of internal-target thickness and experimental luminosity from beam energy loss at HIRFL-CSRe

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Cao-Jie Shao, De-Yang Yu, Rong-Chun Lu, Tie-Cheng Zhao, Rui-Shi Mao, Jie Li, Ying-Li Xue, Wei Wang, Bian Yang, Ming-Wu Zhang, Jun-Liang Liu, Zhang-Yong Song, Xiao-Hong Cai, Xi-Meng Chen, Da-Yu Yin, Li-Jun Mao, Xiao-Dong Yang, Jian-Cheng Yang and You-Jin Yuan. Determination of internal-target thickness and experimental luminosity from beam energy loss at HIRFL-CSRe[J]. Chinese Physics C, 2016, 40(11): 117002. doi: 10.1088/1674-1137/40/11/117002
Cao-Jie Shao, De-Yang Yu, Rong-Chun Lu, Tie-Cheng Zhao, Rui-Shi Mao, Jie Li, Ying-Li Xue, Wei Wang, Bian Yang, Ming-Wu Zhang, Jun-Liang Liu, Zhang-Yong Song, Xiao-Hong Cai, Xi-Meng Chen, Da-Yu Yin, Li-Jun Mao, Xiao-Dong Yang, Jian-Cheng Yang and You-Jin Yuan. Determination of internal-target thickness and experimental luminosity from beam energy loss at HIRFL-CSRe[J]. Chinese Physics C, 2016, 40(11): 117002.  doi: 10.1088/1674-1137/40/11/117002 shu
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    Supported by National Natural Science Foundation of China (11179017, 11105201, U1532130, and U1332206)

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Determination of internal-target thickness and experimental luminosity from beam energy loss at HIRFL-CSRe

    Corresponding author: Cao-Jie Shao,
  • 1. Institute of Modern Physics, Chinese Academy of Sciences, Chinese Academy of Sciences, Lanzhou 730000, China
  • 2. School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
  • 3. University of Chinese Academy of Sciences, Beijing 100049, China
  • 4.  Institute of Modern Physics, Chinese Academy of Sciences, Chinese Academy of Sciences, Lanzhou 730000, China
  • 5. University of Chinese Academy of Sciences, Beijing 100049, China
  • 6.  School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
Fund Project:  Supported by National Natural Science Foundation of China (11179017, 11105201, U1532130, and U1332206)

Abstract: The target thickness for nitrogen was determined from the beam energy loss in HIRFL-CSRe during the experimental study of the K-REC process in 197 MeV/u Xe54+-N2 collisions. Furthermore, the corresponding integrated luminosity of (1.15±0.06)×1030 cm-2 was obtained. As an independent check on the energy-loss method, we have also determined the integrated luminosity by measuring the produced X-rays from the K-REC process with a known differential cross section. The values of (1.12±0.06)×1030 and (1.09±0.06)×1030 cm-2 were obtained by using two high-purity germanium (HPGe) detectors which were oriented at 90° and 120° with respect to the beam path, respectively. The consistent results confirmed the feasibility of the energy-loss method, which may have an important impact on future internal target experiments at HIRFL-CSRe.

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