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

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; You-Jin Yuan

doi:10.1088/1674-1137/40/11/117002

Chinese Physics C> 2016, Vol. 40> Issue(11) : 117002 DOI: 10.1088/1674-1137/40/11/117002

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

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

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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.
- heavy-ion storage ring ,
- internal target ,
- luminosity ,
- target thickness ,
- energy loss

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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

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Supported by National Natural Science Foundation of China (11179017, 11105201, U1532130, and U1332206)

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沈阳化工大学材料科学与工程学院沈阳 110142

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

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

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