The first observation of the double-charge-exchange reaction (-, +) to discrete nuclear states is reported. The mass of C18 has been measured using the reaction O18(-, +)C18 at T()=164 MeV. The reaction C12(-, +)Be12, with known Q0=-25.078(15) MeV, was used as the calibration reaction to obtain Q0=-25.69(15) MeV for the reaction O18(-, +)C18(g.s.). The mass excess of C18 is thus found to be 24.91(15) MeV.
ASJC Scopus subject areas
- Physics and Astronomy(all)