Examining the exotic structure of the proton-rich nucleus Al23

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. OzawaT. Suda, K. Sugawara, T. Suzuki, A. Takisawa, K. Tanaka, T. Yamaguchi, I. Tanihata

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Abstract

The longitudinal momentum distribution (P//) of fragments after one-proton removal from Al23 and reaction cross sections (σR) for Al23,24 on a carbon target at 74A MeV have been measured. The Al23,24 ions were produced through projectile fragmentation of 135A MeV Si28 primary beam using the RIPS fragment separator at RIKEN. P// is measured by a direct time-of-flight (TOF) technique, while σR is determined using a transmission method. An enhancement in σR is observed for Al23 compared with Al24. The P// for Mg22 fragments from Al23 breakup has been obtained for the first time. FWHM of the distributions has been determined to be 232 ± 28 MeV/c. The experimental data are discussed by using the Few-Body Glauber model. Analysis of P// demonstrates a dominant d-wave configuration for the valence proton in ground state of Al23, indicating that Al23 is not a proton halo nucleus.

Original languageEnglish
Article number031601
JournalPhysical Review C - Nuclear Physics
Volume76
Issue number3
DOIs
Publication statusPublished - 2007 Sep 5
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Fang, D. Q., Guo, W., Ma, C. W., Wang, K., Yan, T. Z., Ma, Y. G., Cai, X. Z., Shen, W. Q., Ren, Z. Z., Sun, Z. Y., Chen, J. G., Tian, W. D., Zhong, C., Hosoi, M., Izumikawa, T., Kanungo, R., Nakajima, S., Ohnishi, T., Ohtsubo, T., ... Tanihata, I. (2007). Examining the exotic structure of the proton-rich nucleus Al23. Physical Review C - Nuclear Physics, 76(3), [031601]. https://doi.org/10.1103/PhysRevC.76.031601