The 9Be(n,p)9Li reaction and the Gamow–Teller unit cross section

✍ Scribed by S. Dangtip; J. Blomgren; N. Olsson; H. Condé; K. Elmgren; J. Rahm; A. Ringbom; G. Tibell; O. Jonsson; L. Nilsson; P.-U. Renberg; S.Y. van der Werf

• Book ID: 104333660
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 286 KB
• Volume: 677
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(00)00284-0

✦ Synopsis

Double differential cross sections of the 9 Be(n,p) 9 Li reaction have been measured at 96 MeV in the angular range 0 • -27 • up to about 20 MeV excitation energy. In addition, the 12 C(n,p) 12 B reaction has been measured in the same angular and excitation energy range. Cross sections for reactions leading to the ground state and the first excited state (2.69 MeV) of 9 Li have been analysed using peak-fitting techniques. The data have been compared with cross sections obtained from distortedwave Born approximation calculations. A Gamow-Teller (GT) unit cross section for the ground state transition of 7.4 ± 1.2 mb/sr was determined from the identified GT strength. Discrepancies in the Gamow-Teller unit cross sections for different (n,p) and (p,n) transitions from the 9 Be ground state, resembling the situation for 13 C, have been found.