Investigating Deformation Dependence of Nuclear Dissipation Based on Pathwise Analysis Method

MAO Yingchen; WAN Suyu; LIU Rui; DING Yang; ZHANG Minling; LÜ You; LIU Xin

doi:10.11804/NuclPhysRev.30.03.364

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Article Navigation > Nuclear Physics Review > 2013 > 30(3): 364-368

MAO Yingchen, WAN Suyu, LIU Rui, DING Yang, ZHANG Minling, LÜ You, LIU Xin. Investigating Deformation Dependence of Nuclear Dissipation Based on Pathwise Analysis Method[J]. Nuclear Physics Review, 2013, 30(3): 364-368. doi: 10.11804/NuclPhysRev.30.03.364

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MAO Yingchen, WAN Suyu, LIU Rui, DING Yang, ZHANG Minling, LÜ You, LIU Xin. Investigating Deformation Dependence of Nuclear Dissipation Based on Pathwise Analysis Method[J]. Nuclear Physics Review, 2013, 30(3): 364-368. doi: 10.11804/NuclPhysRev.30.03.364

Investigating Deformation Dependence of Nuclear Dissipation Based on Pathwise Analysis Method

doi: 10.11804/NuclPhysRev.30.03.364

( School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, Liaoning, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2013-09-20

Abstract

Within a certain deformation dependence of nuclear dissipation (DDND), the simulation results about the deexcitation process of ²⁰⁰Pb show that the prescission neutron multiplicities decrease with increasing deformation dependence of level density parameter (DDLDP). Moreover, this pattern is determined by the emission of prescission neutron in the first period of nuclear fission. On the other hand, all of the results from two kinds of different DDNDs can reproduce the experiment data perfectly with a certain DDLDP. In order to illustrate those phenomena, the pathwise analysis method (PAM) is presented in this paper. In the PAM, nuclear dissipation is treated as the damping force on the elongation dimension, whereas the fission dynamics process results from the competition between damping force and the driving force stemming from the nuclear free energy. The prescission neutron multiplicity in the deexcitation process of ²⁰⁰Pb is analyzed, and the results point out that the DDLDP needs to be taken into account in studying the DDND.
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Investigating Deformation Dependence of Nuclear Dissipation Based on Pathwise Analysis Method

doi: 10.11804/NuclPhysRev.30.03.364

( School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, Liaoning, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2013-09-20

Key words:

deformation dependence of nuclear dissipation /
deformation dependence of level density parameter /
pathwise analysis method /
driving force

Abstract: Within a certain deformation dependence of nuclear dissipation (DDND), the simulation results about the deexcitation process of ²⁰⁰Pb show that the prescission neutron multiplicities decrease with increasing deformation dependence of level density parameter (DDLDP). Moreover, this pattern is determined by the emission of prescission neutron in the first period of nuclear fission. On the other hand, all of the results from two kinds of different DDNDs can reproduce the experiment data perfectly with a certain DDLDP. In order to illustrate those phenomena, the pathwise analysis method (PAM) is presented in this paper. In the PAM, nuclear dissipation is treated as the damping force on the elongation dimension, whereas the fission dynamics process results from the competition between damping force and the driving force stemming from the nuclear free energy. The prescission neutron multiplicity in the deexcitation process of ²⁰⁰Pb is analyzed, and the results point out that the DDLDP needs to be taken into account in studying the DDND.

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