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arXiv 0709.1081nucl-ex
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丰质子核$^{23}$ Al奇异结构的研究

Examining exotic structure of proton-rich nucleus $^{23}$Al

D. Q. Fang, W. Guo, C. W. Ma, K. Wang, T. Z. Yan, Y. G. Ma, X. Z. Cai, W. Q. Shen, Z. Z. Ren, Z. Y. Sun, J. G. Chen, W. D. Tian, C. Zhong, M. Hosoi, T. Izumikaw… 展开作者

D. Q. Fang, W. Guo, C. W. Ma, K. Wang, T. Z. Yan, Y. G. Ma, X. Z. Cai, W. Q. Shen, Z. Z. Ren, Z. Y. Sun, J. G. Chen, W. D. Tian, C. Zhong, M. Hosoi, T. Izumikawa, R. Kanungo, S. Nakajima, T. Ohnishi, T. Ohtsubo, A. Ozawa, T. Suda, K. Sugawara, T. Suzuki, A. Takisawa, K. Tanaka, T. Yamaguchi, I. Tanihata

摘要:

本文测量了74 A MeV能量下^{23} Al去除一个质子后碎片的纵向动量分布(P_{//})和^{23,24} Al在碳靶上的反应截面(σ_R)。利用RIKEN的RIPS碎片分离器,通过135 A MeV ^{28} Si初级束的射弹碎裂产生了^{23,24} Al离子。P_{//}通过直接飞行时间(TOF)技术测量,而σ_R使用透射法确定。首次获得了^{23} Al碎裂后的^{22} Mg碎片的P_{//}。分布的半高宽被确定为232 \pm 28 MeV/c。用少体Glauber模型对实验数据进行了讨论。对P_{//}的分析表明,在^{23} Al的基态,价质子的d波组态占优势,这表明^{23} Al不是质子晕核。

英文摘要:

The longitudinal momentum distribution (P_{//}) of fragments after one-proton removal from ^{23} Al and reaction cross sections (σ_R) for ^{23,24} Al on carbon target at 74A MeV have been measured. The ^{23,24} Al ions were produced through projectile fragmentation of 135 A MeV ^{28} Si primary beam using RIPS fragment separator at RIKEN. P_{//} is measured by a direct time-of-flight (TOF) technique, while σ_R is determined using a transmission method. An enhancement in σ_R is observed for ^{23} Al compared with ^{24} Al. The P_{//} for ^{22} Mg fragments from ^{23} Al breakup has been obtained for the first time. FWHM of the distributions has been determined to be 232 \pm 28 MeV/c. The experimental data are discussed by using Few-Body Glauber model. Analysis of P_{//} demonstrates a dominant d-wave configuration for the valence proton in ground state of ^{23} Al, indicating that ^{23} Al is not a proton halo nucleus.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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