A New Criterion for Nuclei with Anomalous Neutron Distribution

FANG De-Qing; SHEN Wen-Qing; FENG Jun; CAI Xiang-Zhou; SU Qian-Min; ZHANG Hu-Yong; HU Peng-Yun; MA Yu-Gang

Chinese Physics C> 2001, Vol. 25> Issue(1) : 44-49

A New Criterion for Nuclei with Anomalous Neutron Distribution

Shanghai Institute of Nuclear Research, The Chinese Academy of Sciences,Shanghai 201800, China

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Abstract：
Comparison of the difference between the neutron and proton RMS radii, RMS, calculated from the neutron skin thickness of the droplet model was made with the data obtained from the experimental total nuclear reaction cross section. It was found that the droplet model reproduced the RMS of normal nuclei well, but it underestimates the RMS for neutron skin and neutron halo nuclei. Since the small separation energy of last one or two neutron is one of the most important causes of the appearance of anomalous nuclear structure, an effective neutron skin thickness was used to distinguish nuclei with anomalous neutron distribution from normal nuclei, which succeeds to reproduce the abnormal increase of the neutron skin thickness for the light nuclei with neutron skin or neutron halo.

References

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FANG De-Qing, SHEN Wen-Qing, FENG Jun, CAI Xiang-Zhou, SU Qian-Min, ZHANG Hu-Yong, HU Peng-Yun and MA Yu-Gang. A New Criterion for Nuclei with Anomalous Neutron Distribution[J]. Chinese Physics C, 2001, 25(1): 44-49.

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Received: 1999-12-02
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

A New Criterion for Nuclei with Anomalous Neutron Distribution

Corresponding author: FANG De-Qing,

Shanghai Institute of Nuclear Research, The Chinese Academy of Sciences,Shanghai 201800, China

Received Date: 1999-12-02

Accepted Date: 1900-01-01

Available Online: 2001-01-05

Abstract: Comparison of the difference between the neutron and proton RMS radii, RMS, calculated from the neutron skin thickness of the droplet model was made with the data obtained from the experimental total nuclear reaction cross section. It was found that the droplet model reproduced the RMS of normal nuclei well, but it underestimates the RMS for neutron skin and neutron halo nuclei. Since the small separation energy of last one or two neutron is one of the most important causes of the appearance of anomalous nuclear structure, an effective neutron skin thickness was used to distinguish nuclei with anomalous neutron distribution from normal nuclei, which succeeds to reproduce the abnormal increase of the neutron skin thickness for the light nuclei with neutron skin or neutron halo.

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A New Criterion for Nuclei with Anomalous Neutron Distribution

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