Towards Microscopic Descriptions of Thermal Fission Rates

PEI Junchen; ZHU Yi

doi:10.11804/NuclPhysRev.34.01.087

The studies of thermal fission rates are relevant to novel reactors, astrophysical environments, and survival probabilities of compound superheavy nuclei. This has been conventionally studied by the Bohr-Wheeler statistical model that depends on phenomenological level densities and fission barriers. In this context, we propose to study the thermal fission rates based on microscopic temperature dependent nuclear energy density functional theory. The microscopic temperature dependent fission barrier heights and curvatures, and collective mass parameters can be self-consistently obtained. The fission lifetimes from low to high temperatures can be given by the imaginary free energy method in a consistent framework. Microscopic temperature dependent fission barriers play an essential role in fission studies.

Towards Microscopic Descriptions of Thermal Fission Rates

School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China

Funds: National Natural Science Foundation of China(11375016, 11522538); Doctoral Program of Higher Education of China(20130001110001)

Received Date: 2016-09-01

Publish Date: 2017-03-20

Key words:

Abstract: The studies of thermal fission rates are relevant to novel reactors, astrophysical environments, and survival probabilities of compound superheavy nuclei. This has been conventionally studied by the Bohr-Wheeler statistical model that depends on phenomenological level densities and fission barriers. In this context, we propose to study the thermal fission rates based on microscopic temperature dependent nuclear energy density functional theory. The microscopic temperature dependent fission barrier heights and curvatures, and collective mass parameters can be self-consistently obtained. The fission lifetimes from low to high temperatures can be given by the imaginary free energy method in a consistent framework. Microscopic temperature dependent fission barriers play an essential role in fission studies.

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Towards Microscopic Descriptions of Thermal Fission Rates

doi: 10.11804/NuclPhysRev.34.01.087

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