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

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

2007-09-07

arxiv.org/abs/0709.1081v1

Phys.Rev.C76:031601,2007

Physics

Nuclear Physics

Nuclear Experiment

Scientific paper

10.1103/PhysRevC.76.031601

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.

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