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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

  • 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

    [1] Tanihata I, Hamagaki H, Hashimoto O et al. Phys. Rev. Lett., 1985, 55:26762 Minamisono T, Ohtsubo T, Minami T et al. Phys. Rev. Lett., 1992, 69:20583 Kobayashi T, Yamakawa O, Omata K et al. Phys. Rev. Lett., 1988, 60:2599 4 Ozawa A, Tanihata I, Kobayashi T et al. Nucl. Phys., 1996, A608:635 Swiatecki W J. Phys. Rev., 1955, 98:204; Burhop E H S, Davis D H, Sacton J et al. Nucl. Phys., 1969, A132:625; Auerhach N, Hufner J, Kerman A K et al. Phys. Rev. Lett., 1969, 23:484 6 Myers W D, Swiatecki W J. Nucl. Phys., 1980, A336:2677 Tanihata I, Kobayashi T, Yamakawa O et al. Phys. Lett., 1988, B206:592; Tanihata I, Hirata D, Kobayashi T etal. Phys. Lett., 1992, B289: 261; Ozawa A, Bochkarev O, Chulkov L et al. RIKEN–AF–NP–294(1998); Suzuki T, Geissel H, Bochkarev O et al. Nucl. Phys., 1998, A630:661 8 Warmer R E, Patty R A, Voles P M et al. Phys. Rev., 1996, C54: 1700;Villari A C C, Mittig W, Plagnol E et al.Phys. Lett., 1991, B268:345; Saint–Laurent M G, Anne R, Bazin D et al. Z. Phys., 1989, A332:4579 Audi G, Wapstra A H. Nucl. Phys., 1993, A565:66 10 Myers W D, Schmidt K H. Nucl. Phys., 1983, A410:61

  • References

    [1] Tanihata I, Hamagaki H, Hashimoto O et al. Phys. Rev. Lett., 1985, 55:26762 Minamisono T, Ohtsubo T, Minami T et al. Phys. Rev. Lett., 1992, 69:20583 Kobayashi T, Yamakawa O, Omata K et al. Phys. Rev. Lett., 1988, 60:2599 4 Ozawa A, Tanihata I, Kobayashi T et al. Nucl. Phys., 1996, A608:635 Swiatecki W J. Phys. Rev., 1955, 98:204; Burhop E H S, Davis D H, Sacton J et al. Nucl. Phys., 1969, A132:625; Auerhach N, Hufner J, Kerman A K et al. Phys. Rev. Lett., 1969, 23:484 6 Myers W D, Swiatecki W J. Nucl. Phys., 1980, A336:2677 Tanihata I, Kobayashi T, Yamakawa O et al. Phys. Lett., 1988, B206:592; Tanihata I, Hirata D, Kobayashi T etal. Phys. Lett., 1992, B289: 261; Ozawa A, Bochkarev O, Chulkov L et al. RIKEN–AF–NP–294(1998); Suzuki T, Geissel H, Bochkarev O et al. Nucl. Phys., 1998, A630:661 8 Warmer R E, Patty R A, Voles P M et al. Phys. Rev., 1996, C54: 1700;Villari A C C, Mittig W, Plagnol E et al.Phys. Lett., 1991, B268:345; Saint–Laurent M G, Anne R, Bazin D et al. Z. Phys., 1989, A332:4579 Audi G, Wapstra A H. Nucl. Phys., 1993, A565:66 10 Myers W D, Schmidt K H. Nucl. Phys., 1983, A410:61

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