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Chinese Physics C> 1998, Vol. 22> Issue(8) : 678-683 

Space-Time Evolution During Emission of Intermediate Mass Fragmentform 40Ar+159Tb Reaction at 30 MeV/u

  •  Instintute of Modern Physics, The Chinese Academy of Sciences. Lanzhou 730000

  • The emission time of intermediate mass fragments has been studied as afunction of spatial evolution of the source for 40Ar+159Tb reaction at 30 MeV/u.Reduction of the mass number of source has a very small effect on the extractedemission time. For the high-energy fragments with a short emission time ≤100fm/c,a smaller nuclear density would lead to a smaller assignment for, therefore thevalues extracted in the normal nuclear density could be taken as upper limits of realvalues. For the low-energy fragments, their emission times do not vary with size ofthe source and these values could be taken as real values.
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    [1] Fox D et al. Phys. Rev., 1993, C47(2):R421-R424[2] Bauge E et al. Phys. Rev. Lett., 1993, 70(24):3705--3708[3] Kim Y D et al. Phys. Rev. Lett, 1991, 67(1): 14-17[4] Comell E et al. Phys. Rev. Lett., 1995, 75(8): 1475-1478[5] He Zhiyong et al. Acta Physica Sinica, 1997, 46(7): 1312-1318[6] He Zhiyong et al. High Energy Physics and Nuclear Physics (in Chinese), 1996, 20(1):8--12; 1996, 20(7):596-600(贺智勇等。高能物理与核物理,1996,20(1):8-12:1996,20(7):596-600)[7] He Zhiyong et al. Chinese Physics Letters, 1995, 12(9):521-523; 1996, 13(3):168-171[8] He Zhiyong et al. Nucl. Phys., 1997, A620(2):.214-228[9] He Zhiyong et al. Eur. Phys. J., 1998, A1:61-64[10] Elmaani A et al. Nucl. Instr. Meth., 1992, A313:401-412[11] Xi Hongfei et al. Nucl. Phys., 1993, A552:281-292[12] Pochodzalla J et al. Phys. Rev., 1987, C35(5): 1695-1719

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He Zhiyong, Li Zuyu, Duan Limin, Zhang Baoguo, Jin Genming, Dai guangxi, Wang Hongwei and Fu Yanbiao. Space-Time Evolution During Emission of Intermediate Mass Fragmentform 40Ar+159Tb Reaction at 30 MeV/u[J]. Chinese Physics C, 1998, 22(8): 678-683.
He Zhiyong, Li Zuyu, Duan Limin, Zhang Baoguo, Jin Genming, Dai guangxi, Wang Hongwei and Fu Yanbiao. Space-Time Evolution During Emission of Intermediate Mass Fragmentform 40Ar+159Tb Reaction at 30 MeV/u[J]. Chinese Physics C, 1998, 22(8): 678-683. shu
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Received: 1900-01-01
Revised: 1900-01-01
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Space-Time Evolution During Emission of Intermediate Mass Fragmentform 40Ar+159Tb Reaction at 30 MeV/u

    Corresponding author: He Zhiyong,
  • Instintute of Modern Physics, The Chinese Academy of Sciences. Lanzhou 730000
  • Received Date: 1900-01-01
  • Accepted Date: 1900-01-01
  • Available Online: 1998-08-05

Abstract: The emission time of intermediate mass fragments has been studied as afunction of spatial evolution of the source for 40Ar+159Tb reaction at 30 MeV/u.Reduction of the mass number of source has a very small effect on the extractedemission time. For the high-energy fragments with a short emission time ≤100fm/c,a smaller nuclear density would lead to a smaller assignment for, therefore thevalues extracted in the normal nuclear density could be taken as upper limits of realvalues. For the low-energy fragments, their emission times do not vary with size ofthe source and these values could be taken as real values.

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