| Original Articles |
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Properties of the First 1/2+ Excitation State of 13C by 22 MeV Proton Inelastic Scattering |
| AN Zhu1;CHEN Quan2;CHENG Ye-Hao2;SHEN Dong-Jun2;GUO Gang2 |
| 1Key Laboratory for Radiation Physics and Technology of Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064
2China Institute of Atomic Energy, PO Box 275 (10), Beijing 102413 |
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| Cite this article: |
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AN Zhu, CHEN Quan, CHENG Ye-Hao et al 2003 Chin. Phys. Lett. 20 478-481 |
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Abstract The differential cross sections of 22 MeV proton inelastic scattering for the first 1/2+ excitation state (Ex = 3.09 MeV) of 13C have been measured between 9°and 130°. The broad peak located at ～ 120°, which has been systematically observed in the 0+ → 0-, 1/2- → 1/2+, and 1+ → 1- transitions for the 16O, 13C, and 14,15N (p,n) charge exchange reactions at Ep = 35 MeV, has been observed for the first time in the present proton inelastic scattering. The present experimental data are analysed by using microscopic distorted-wave Born approximation. From the comparison of present experimental data and theoretical results at forward angles, our analysis indicates the existence of neutron halo in the first 1/2+ excitation state of the 13C nucleus. In addition, by reasonable modification of shell model wavefunction of the first 1/2+ excitation state, we can well describe the experimental form factors of (e,e') and the experimental differential cross sections of (p,p') at incident energy of 547 MeV.
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| Keywords:
25.40.Ep
24.10.Eq
21.60.Cs
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Published: 01 April 2003
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| PACS: |
25.40.Ep
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(Inelastic proton scattering)
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24.10.Eq
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(Coupled-channel and distorted-wave models)
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21.60.Cs
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(Shell model)
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