Examining exotic structure of proton-rich nucleus $^{23}$Al
Abstract
The longitudinal momentum distribution (P_{//}) of fragments after one-proton removal from ^{23} Al and reaction cross sections (\sigma_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 \sigma_R is determined using a transmission method. An enhancement in \sigma_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.
Keywords
Cite
@article{arxiv.0709.1081,
title = {Examining exotic structure of proton-rich nucleus $^{23}$Al},
author = {D. Q. Fang and W. Guo and C. W. Ma and K. Wang and T. Z. Yan and Y. G. Ma and X. Z. Cai and W. Q. Shen and Z. Z. Ren and Z. Y. Sun and J. G. Chen and W. D. Tian and C. Zhong and M. Hosoi and T. Izumikawa and R. Kanungo and S. Nakajima and T. Ohnishi and T. Ohtsubo and A. Ozawa and T. Suda and K. Sugawara and T. Suzuki and A. Takisawa and K. Tanaka and T. Yamaguchi and I. Tanihata},
journal= {arXiv preprint arXiv:0709.1081},
year = {2008}
}