Level Inversion and the Mean Field in <SUP>11</SUP>Be

GAO Zao-Chun; CHEN Yong-Shou

Chinese Physics C> 2003, Vol. 27> Issue(12) : 1100-1105

Level Inversion and the Mean Field in ¹¹Be

GAO Zao-Chun ^, ,
CHEN Yong-Shou

China Institute of Atomic Energy,Beijing 102413,China2 Institute of Theoretic Physics,CAS,Beijing 100080,China

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Abstract：
The inversion of 2s_1/2 and 1p_1/2 levels occurred in the one-neutron halo nucleus,¹¹Be, is studied in detail. It is pointed out that, for neutron halo nuclei, such as ¹¹Be, the one neutron separation energy, S_n, and the depth of the last neutron in the potential well, D_g, should have quite different values. After the failure of the Woods-Saxon potential, we construct a new potential, called as Double modified-Woods-Saxon (DMWS) potential, to describe the mean field of ¹¹Be, which has been able perfectly to reproduce this level inversion phenomenon without the help of configuration mixing. It has been shown that the level inversion in the ¹¹Be may indicate that the halo nuclei have a quite different mean field in contrast to the stable ones.

References

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GAO Zao-Chun and CHEN Yong-Shou. Level Inversion and the Mean Field in ¹¹Be[J]. Chinese Physics C, 2003, 27(12): 1100-1105.

GAO Zao-Chun and CHEN Yong-Shou. Level Inversion and the Mean Field in ¹¹Be[J]. Chinese Physics C, 2003, 27(12): 1100-1105. shu

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Received: 2003-04-10
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Level Inversion and the Mean Field in ¹¹Be

GAO Zao-Chun ^,
CHEN Yong-Shou

Corresponding author: GAO Zao-Chun,

China Institute of Atomic Energy,Beijing 102413,China2 Institute of Theoretic Physics,CAS,Beijing 100080,China

Received Date: 2003-04-10
Accepted Date: 1900-01-01
Available Online: 2003-12-05

Abstract: The inversion of 2s_1/2 and 1p_1/2 levels occurred in the one-neutron halo nucleus,¹¹Be, is studied in detail. It is pointed out that, for neutron halo nuclei, such as ¹¹Be, the one neutron separation energy, S_n, and the depth of the last neutron in the potential well, D_g, should have quite different values. After the failure of the Woods-Saxon potential, we construct a new potential, called as Double modified-Woods-Saxon (DMWS) potential, to describe the mean field of ¹¹Be, which has been able perfectly to reproduce this level inversion phenomenon without the help of configuration mixing. It has been shown that the level inversion in the ¹¹Be may indicate that the halo nuclei have a quite different mean field in contrast to the stable ones.