期刊
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS
卷 2016, 期 4, 页码 -出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/ptep/ptw034
关键词
-
资金
- program of the Japanese government [23224008]
- NSERC, Canada
- Grants-in-Aid for Scientific Research [23224008] Funding Source: KAKEN
Production cross sections of nitrogen isotopes from high-energy (similar to 950MeV per nucleon) carbon isotopes on hydrogen and carbon targets have been measured for the first time for a wide range of isotopes (A = 12 to 19). The fragment separator FRS at GSI was used to deliver C-isotope beams. The cross sections of the production of N-isotopes were determined by charge measurements of forward-going fragments. The cross sections show a rapid increase with the number of neutrons in the projectile. Since the production of nitrogen is mostly due to charge-exchange (Cex) reactions below the proton separation energies, the present data suggests a concentration of Gamow-Teller and/or Fermi transition strength at low excitation energies for neutron-rich carbon isotopes. It was also observed that the Cex cross sections were enhanced much more strongly for neutron-rich isotopes in the C-target data.
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