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Chinese Physics C> 1992, Vol. 16> Issue(6) : 571-576 

Overshooting and Prescission Neutron Multiplicity in Nuclear Fission

  •  Institute of Atomic Energy,Beijing 102413

  • The transient behavior in approaching to quasi-stationary state for fissioning systems is studied by diffusion model.It is shown that there are two regions:Kramers region for Tf and overshooting region for T>Ef according to the transient behavior of probability current.A particular attention is paid to the overshooting region because it tends to decrease the enhancement effect of neutron multiplicity and even leads to its disappearance.However it has been proved that the enhancement of neutron multiplicity results from the transient behavior in fission process.
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    [1] H.A. Kramers, Physica, 7 (1940), 284.[2] 冯仁发等，原子核物理，10(1988)，16.[3] 冯仁发等，原子核物理，10(1988)?120.[4] Wu Xiahen, et al., Commum，.Theor. Phys., 1(1982), 769.[5] Wu Xiahen, et al., Chinese Phys. Lett 5(1988), 41.[6] Zhuo Yiahong, et al., Nuclear Data for Science and Technology (1988 MITO)667.[7] 孙豁民等，原子核物理10(1988)，307.[8] P.Grange, et al., Phys. Rev., C34 (1986), 209.

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SUN Zhe-Min, FENG Ren-Fa, WU Xi-Zhen and ZHU Yi-Zhong. Overshooting and Prescission Neutron Multiplicity in Nuclear Fission[J]. Chinese Physics C, 1992, 16(6): 571-576.
SUN Zhe-Min, FENG Ren-Fa, WU Xi-Zhen and ZHU Yi-Zhong. Overshooting and Prescission Neutron Multiplicity in Nuclear Fission[J]. Chinese Physics C, 1992, 16(6): 571-576. shu
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Received: 1900-01-01
Revised: 1900-01-01
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Overshooting and Prescission Neutron Multiplicity in Nuclear Fission

    Corresponding author: SUN Zhe-Min,
  • Institute of Atomic Energy,Beijing 102413
  • Received Date: 1900-01-01
  • Accepted Date: 1900-01-01
  • Available Online: 1992-06-05

Abstract: The transient behavior in approaching to quasi-stationary state for fissioning systems is studied by diffusion model.It is shown that there are two regions:Kramers region for Tf and overshooting region for T>Ef according to the transient behavior of probability current.A particular attention is paid to the overshooting region because it tends to decrease the enhancement effect of neutron multiplicity and even leads to its disappearance.However it has been proved that the enhancement of neutron multiplicity results from the transient behavior in fission process.

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