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Chinese Physics C> 2001, Vol. 25> Issue(2) : 115-120 

Energy Correlations between Fragments and Light Charged Particles in Reaction of 25MeV/u 40Ar+115In

  •  Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

  • The correlations between the emitted fragments at θlab=15°and the light charged particles(LCPs) at the close geometry configuration in the reaction of 25MeV/u 40Ar+115In were measured. The energy correlations between fragments (4≤Zf≤14) and the LCPs including proton, deuterium, tritium and a particle as well as the energy spectra of the LCPs were obtained. The result shows the existence of sequential decay mechanism. It is found that the peak position of angular correlation is at the small angles and the most probable correlation angle is at 2°or so; The peak positions of the two components in the energy spectra of LCPs increase gradually with the mass of correlated partner; The lighter primaly products are more easier to be excited and decay to IMFs and the LCPs. In the Sequential decay, the yield of the LCPs with more heavier mass is higher than that of the lighter LCPs. The result reveals that the total correlation yield ratios summed over the fragments of Zf=4—14 are 1: 1. 3: 1. 78: 7. 57 for proton, deuterium, tritium and a particles, respectively.
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    [1] Magieria A et al. Phys. Rev., 1998, C57:749 2 Gonthier P L et al. Phys. Rev., 1991, C43:R15043 Steckmeyer J C et al. Nucl. Phys., 1989, A500:372 4 Pawlowski P et al. Z. Phys., 1997, A357:387 5 Benchekroun D et al. Z. Phys., 1997, A356:411 6 SHEN W Q et al. Phys. Rev., 1997, C56:1996 7 Wilson W K et al. Phys. Rev., 1995, C51:3136 8 HE Zhi–Yong et al. High Energy Physics and Nuclear Physics, 1996, 20(1 ):394(in Chinese)(贺智勇等.高能物理与核物理,1996,20(1):394)9 Angelique J C et al. Nucl. Phys., 1997, A614:261 10 HE Zhi–Yong et al. Eur. Phys. J., 1998, Al:6111 XI Hong–Fei et al. Nucl. Phys., 1993, A552:28112 W–U H Y et al. Nucl Phys., 1997, A617:38513 WANG Jin–Chuan et al. High Energy Physics and Nuclear Physics, 2000, 24(l ):41(in Chinese)(王金川等. 高能物理与核物理,2000,24(1):673) 14 WANG Jin–Chuan et al. Acta Physica Sinica, 2000, 24(5):872(in Chinese)(王金川等. 物理学报,2000,24(5):872) 15 WANG Jin–Chuan et al. High Energy Physics and Nuclear Physics, 2001, 25(l): 16–22(in Chinese)(王金川等. 高能物理与核物理,2001,25(1):16–22)16 WANG Jin–Chuan et al. Nucl. Instr. Meth., 1996, A368:473 17 WANG Jin–Chuan et al. Nuclear Electronics Detection Technology, 1994, 14(3): 135(in Chinese)(王金川等. 核电子学与探测技术,1994,14(3):135)

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WANG Jin-Chuan, ZHAN Wen-Long, GUO Zhong-Yan, XI Hong-Fei, ZHOU Jian-Qun and ZHAO You-Xiong. Energy Correlations between Fragments and Light Charged Particles in Reaction of 25MeV/u 40Ar+115In[J]. Chinese Physics C, 2001, 25(2): 115-120.
WANG Jin-Chuan, ZHAN Wen-Long, GUO Zhong-Yan, XI Hong-Fei, ZHOU Jian-Qun and ZHAO You-Xiong. Energy Correlations between Fragments and Light Charged Particles in Reaction of 25MeV/u 40Ar+115In[J]. Chinese Physics C, 2001, 25(2): 115-120. shu
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Received: 1999-12-16
Revised: 1900-01-01
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Energy Correlations between Fragments and Light Charged Particles in Reaction of 25MeV/u 40Ar+115In

    Corresponding author: WANG Jin-Chuan,
  • Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China
  • Received Date: 1999-12-16
  • Accepted Date: 1900-01-01
  • Available Online: 2001-02-05

Abstract: The correlations between the emitted fragments at θlab=15°and the light charged particles(LCPs) at the close geometry configuration in the reaction of 25MeV/u 40Ar+115In were measured. The energy correlations between fragments (4≤Zf≤14) and the LCPs including proton, deuterium, tritium and a particle as well as the energy spectra of the LCPs were obtained. The result shows the existence of sequential decay mechanism. It is found that the peak position of angular correlation is at the small angles and the most probable correlation angle is at 2°or so; The peak positions of the two components in the energy spectra of LCPs increase gradually with the mass of correlated partner; The lighter primaly products are more easier to be excited and decay to IMFs and the LCPs. In the Sequential decay, the yield of the LCPs with more heavier mass is higher than that of the lighter LCPs. The result reveals that the total correlation yield ratios summed over the fragments of Zf=4—14 are 1: 1. 3: 1. 78: 7. 57 for proton, deuterium, tritium and a particles, respectively.

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