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Article Navigation >  Nuclear Physics Review  > 2018  >  35(1): 18-22

REN Peipei, LIU Xingquan, LIN Weiping, WANG Jiansong, CHEN Zhiqiang, XIAO Guoqing. Z-dependence Flow Pattern and Experimental Filter Effect on Transverse Flow Extraction in Intermediate-energy Heavy Ion Collisions[J]. Nuclear Physics Review, 2018, 35(1): 18-22. doi: 10.11804/NuclPhysRev.35.01.018
Citation: REN Peipei, LIU Xingquan, LIN Weiping, WANG Jiansong, CHEN Zhiqiang, XIAO Guoqing. Z-dependence Flow Pattern and Experimental Filter Effect on Transverse Flow Extraction in Intermediate-energy Heavy Ion Collisions[J]. Nuclear Physics Review, 2018, 35(1): 18-22. doi: 10.11804/NuclPhysRev.35.01.018
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Z-dependence Flow Pattern and Experimental Filter Effect on Transverse Flow Extraction in Intermediate-energy Heavy Ion Collisions

doi: 10.11804/NuclPhysRev.35.01.018
  • 1.

    Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;

  • 2.

    University of Chinese Academy of Sciences, Beijing 100049, China

Funds:  National Natural Science Foundation of China(11705242);National Basic Research Program of China (973 Program)(2014CB845405); CAS "Light of West China" Program (29Y601030)
  • Received Date: 2017-05-14
  • Rev Recd Date: 2017-05-23
  • Publish Date: 2018-03-20
  • The transverse flow in the reaction of 40Ca+40Ca at 35 MeV/nucleon has been determined for emitted isotopes with Z=1 to 9. A significant modification of the Z-dependent flow pattern caused by the experimental filters, the detector thresholds and the angular resolutions (△ϕ) of the detector array, is observed. With the application of the appropriate experimental filters, the general trend of the experimental Z-dependent flow is well reproduced by the Constrained Molecular Dynamics (CoMD) simulation, employing an effective interaction corresponding to a soft EOS (K=200 MeV). This fact suggests that to determine the flow values more precisely, a detection system with lower energy threshold and better angular resolution is urgently required. Additionally, together with the parallel work of Z. Kohley et al.[Phys Rev C, 2012, 85:064605], the pattern of the experimental Z dependence of transverse flow is also discussed. The shoulder patterns of Z-dependent flow for 1 ≤ Z ≤ 6 can be attributed by the experimental filters, while the reduction of flow for Z ≥ 6 in our experiment can be caused by the suppression of collective motion under the momentum conservation.
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Z-dependence Flow Pattern and Experimental Filter Effect on Transverse Flow Extraction in Intermediate-energy Heavy Ion Collisions

doi: 10.11804/NuclPhysRev.35.01.018
  • 1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
  • 2. University of Chinese Academy of Sciences, Beijing 100049, China
Funds:  National Natural Science Foundation of China(11705242);National Basic Research Program of China (973 Program)(2014CB845405); CAS "Light of West China" Program (29Y601030)
  • Received Date: 2017-05-14
  • Rev Recd Date: 2017-05-23
  • Publish Date: 2018-03-20

Abstract: The transverse flow in the reaction of 40Ca+40Ca at 35 MeV/nucleon has been determined for emitted isotopes with Z=1 to 9. A significant modification of the Z-dependent flow pattern caused by the experimental filters, the detector thresholds and the angular resolutions (△ϕ) of the detector array, is observed. With the application of the appropriate experimental filters, the general trend of the experimental Z-dependent flow is well reproduced by the Constrained Molecular Dynamics (CoMD) simulation, employing an effective interaction corresponding to a soft EOS (K=200 MeV). This fact suggests that to determine the flow values more precisely, a detection system with lower energy threshold and better angular resolution is urgently required. Additionally, together with the parallel work of Z. Kohley et al.[Phys Rev C, 2012, 85:064605], the pattern of the experimental Z dependence of transverse flow is also discussed. The shoulder patterns of Z-dependent flow for 1 ≤ Z ≤ 6 can be attributed by the experimental filters, while the reduction of flow for Z ≥ 6 in our experiment can be caused by the suppression of collective motion under the momentum conservation.

REN Peipei, LIU Xingquan, LIN Weiping, WANG Jiansong, CHEN Zhiqiang, XIAO Guoqing. Z-dependence Flow Pattern and Experimental Filter Effect on Transverse Flow Extraction in Intermediate-energy Heavy Ion Collisions[J]. Nuclear Physics Review, 2018, 35(1): 18-22. doi: 10.11804/NuclPhysRev.35.01.018
Citation: REN Peipei, LIU Xingquan, LIN Weiping, WANG Jiansong, CHEN Zhiqiang, XIAO Guoqing. Z-dependence Flow Pattern and Experimental Filter Effect on Transverse Flow Extraction in Intermediate-energy Heavy Ion Collisions[J]. Nuclear Physics Review, 2018, 35(1): 18-22. doi: 10.11804/NuclPhysRev.35.01.018
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