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Chinese Physics C> 2000, Vol. 24> Issue(10) : 945-948 

Effect of Deformation on Prescission Particle Emission in the Reaction of 10.6 MeV/u 84Kr+27Al

  •  Department of Physics, Southeast of University, Nanjing 210096,China2 Shanghai Institute of Nuclear Research, The Chinese Academy of Science, Shanghai 201800,China

  • Effect of deformation on prescission particle emission was studied. The fission delay time extracted from the measured prescission light charged particle multiplicity of fission of light system 111In, produced in 10.6MeV/u 84Kr+27Al collision, is reduced to 5×10－21s from 20×10－21s, if including deformation effect, which indicates that part of the excess of prescission particle emission comes from the deformation effect contribution. The reason is that deformation of the system leads to a decrease of the barriers for proton and α particle emission even larger than the increase of their binding energies.
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    [1] Hinde D J et al. Phys. Rev.，1992 , 045 :1229-12592 Lestone J P et al. Phys. Rev. Lett.，1991，67:1078-10813 Paul P, Thoermessen M. Annu. Rev. Nucl. Part. Sci，1994 , 44:65-1084 YE W et al. Z. Phys.，1997, A359:385-3895 Nakagawa T et al. Nrxl. Phys.，1995 , A583 :149-1526 Yuasa-Nakagawa K et al. Yhys. Rev.，1996 , 053:997-10007 YE W et al. High Energy Phys. and Nrx(. Phys.，1997, 21(1) :417-4238 SHEN W Q et al. Phys. Rev，1997 , C56:1996-20029 Schad L et al. Z. Phys，1984, A313:17910 Simhel M H. Z. Phys.，1984, A313:311-31711 Charity R Jet al. Nucl. Phys.，1988, A483:371-40512 Lestone J P. Phys. Rev. Lett.，1993 , 70 : 2245-224813 Ghatterjee A et al. Phys. Rev.，1995, C42:3167-3173

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YE Wei and SHEN WenQing. Effect of Deformation on Prescission Particle Emission in the Reaction of 10.6 MeV/u 84Kr+27Al[J]. Chinese Physics C, 2000, 24(10): 945-948.
YE Wei and SHEN WenQing. Effect of Deformation on Prescission Particle Emission in the Reaction of 10.6 MeV/u 84Kr+27Al[J]. Chinese Physics C, 2000, 24(10): 945-948. shu
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Received: 1999-09-08
Revised: 1900-01-01
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Effect of Deformation on Prescission Particle Emission in the Reaction of 10.6 MeV/u 84Kr+27Al

    Corresponding author: YE Wei,
  • Department of Physics, Southeast of University, Nanjing 210096,China2 Shanghai Institute of Nuclear Research, The Chinese Academy of Science, Shanghai 201800,China
  • Received Date: 1999-09-08
  • Accepted Date: 1900-01-01
  • Available Online: 2000-10-05

Abstract: Effect of deformation on prescission particle emission was studied. The fission delay time extracted from the measured prescission light charged particle multiplicity of fission of light system 111In, produced in 10.6MeV/u 84Kr+27Al collision, is reduced to 5×10－21s from 20×10－21s, if including deformation effect, which indicates that part of the excess of prescission particle emission comes from the deformation effect contribution. The reason is that deformation of the system leads to a decrease of the barriers for proton and α particle emission even larger than the increase of their binding energies.

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