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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. Ozawa
  • T. Suda, K. Sugawara, T. Suzuki, A. Takisawa, K. Tanaka, T. Yamaguchi, I. Tanihata
*Corresponding author for this work
  • Chinese Academy of Sciences
  • Nanjing University
  • CAS - Institute of Modern Physics
  • Saitama University
  • Niigata University
  • TRIUMF
  • RIKEN
  • University of Tsukuba

Research output: Contribution to journalArticlepeer-review

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
StatePublished - 5 Sep 2007
Externally publishedYes

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