| Gamow-Teller transitions from 24 Mg to 24 Na were studied via the (t,3 He) reaction at 115 AMeV using a secondary triton beam produced via fast fragmentation of 150 AMeV 16 O ions. Compared to previous (t,3 He) experiments at this energy that employed a primary α beam, the secondary beam intensity is improved by about a factor of five. Despite the large emittance of the secondary beam, an excitation-energy resolution of ∼ 200 keV is achieved. A good correspondence is found between the extracted Gamow-Teller strength distribution and those available from other charge- exchange probes. Theoretical calculations using the newly developed USDA and USDB sd-shell
model interactions reproduce the data well. |
