Systematic Investigation on Spectroscopy of Transfermium Nuclei

ZHANG Zhenhua; WEN Kai; HE Xiaotao; ZENG Jinyan; ZHAO Enguang; ZHOU Shangui

doi:10.11804/NuclPhysRev.30.03.268

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ZHANG Zhenhua, WEN Kai, HE Xiaotao, ZENG Jinyan, ZHAO Enguang, ZHOU Shangui. Systematic Investigation on Spectroscopy of Transfermium Nuclei[J]. Nuclear Physics Review, 2013, 30(3): 268-277. doi: 10.11804/NuclPhysRev.30.03.268

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ZHANG Zhenhua, WEN Kai, HE Xiaotao, ZENG Jinyan, ZHAO Enguang, ZHOU Shangui. Systematic Investigation on Spectroscopy of Transfermium Nuclei[J]. Nuclear Physics Review, 2013, 30(3): 268-277. doi: 10.11804/NuclPhysRev.30.03.268

Systematic Investigation on Spectroscopy of Transfermium Nuclei

doi: 10.11804/NuclPhysRev.30.03.268

State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China;
State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics,Chinese Academy of Sciences, Beijing 100190, China;
College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
School of Physics, Peking University, Beijing 100871, China;

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

Abstract

Experimental and theoretical studies on the spectroscopy of the transfermium nuclei are briefly reviewed.Recent theoretical progresses made by us is introduced. Moreover, the structure of the superheavy nuclei is investigated.
The rotational spectra in even-even and odd-A nuclei in this mass region are systematically studied by using several empirical formulas. Our result shows that compared with the AB formula and the Harris formula, the ab formula can give
a better description for rotational spectra of ground-state bands in even-even nuclei in this mass region. By fitting the experimental single-particle spectra of the odd-A nuclei in this mass region, a new set of Nilsson parameters is proposed.The rotational bands of the transfermium nuclei are investigated systematically by using a cranked shell model with the pairing correlations treated by a particle number conserving method. The experimental kinematic moments of inertia and angular momentum alignments are reproduced quite well. By analyzing the occupation probability of each cranked Nilsson orbital near the Fermi surface and the contributions of valence orbitals in each major shell to the angular momentum alignment, the upbending mechanism in this mass region could be understood clearly. This new Nilsson parameter set is also used to investigate the shell effects and the microscopic shell correction energies of the superheavy nuclei. The calculated results predict that center of the superheavy island is Z = 120, N = 182.
- transfermium nuclei,
- rotational band,
- ab formula,
- particle number conserving method,
- cranked shell model
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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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Systematic Investigation on Spectroscopy of Transfermium Nuclei

doi: 10.11804/NuclPhysRev.30.03.268

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

State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics,Chinese Academy of Sciences, Beijing 100190, China;

College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;

School of Physics, Peking University, Beijing 100871, China;

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

Key words:

Abstract: Experimental and theoretical studies on the spectroscopy of the transfermium nuclei are briefly reviewed.Recent theoretical progresses made by us is introduced. Moreover, the structure of the superheavy nuclei is investigated.
The rotational spectra in even-even and odd-A nuclei in this mass region are systematically studied by using several empirical formulas. Our result shows that compared with the AB formula and the Harris formula, the ab formula can give
a better description for rotational spectra of ground-state bands in even-even nuclei in this mass region. By fitting the experimental single-particle spectra of the odd-A nuclei in this mass region, a new set of Nilsson parameters is proposed.The rotational bands of the transfermium nuclei are investigated systematically by using a cranked shell model with the pairing correlations treated by a particle number conserving method. The experimental kinematic moments of inertia and angular momentum alignments are reproduced quite well. By analyzing the occupation probability of each cranked Nilsson orbital near the Fermi surface and the contributions of valence orbitals in each major shell to the angular momentum alignment, the upbending mechanism in this mass region could be understood clearly. This new Nilsson parameter set is also used to investigate the shell effects and the microscopic shell correction energies of the superheavy nuclei. The calculated results predict that center of the superheavy island is Z = 120, N = 182.

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