Isobaric analog resonances in the 68Zn(p,γ)69Ga reaction
Abstract
Isobaric analog resonances in 69Ga corresponding to the ground (1/2-) and first excited (9/2+) parent states of 69Zn have been studied by the 68Zn(p,γ) reaction. The γ decay of the ground state of 69Zn is compared with the β decay of the parent isobaric analog state. The latter is a pure Gamow-Teller transition to the ground (3/2-) and third (3/2-) excited states, while both Gamow-Teller and Fermi matrix elements can contribute in the decay to the second excited (1/2-) state of 69Ga. The M1 decay widths obtained from the γ decay of the Jπ=12- isobaric analog state are in good agreement with the widths extracted from the ft values in the first two of the three β-decay branches. However, the M1 decay width to the third excited state disagrees with the value deduced from the ft value of the β decay of the 69Zn g.s. to this state. In addition, the M1 transition strength of the 9/2+ (T>) state to the 9/2+ (T<) state in 69Ga has been measured and is compared with the recently published systematic trends for the analog to antianalog transition in other f-p shell nuclei. NUCLEAR REACTIONS 68Zn(p,γ), E=3.2-3.8 MeV. 69Ga deduced resonances, measured Eγ and Γγ, M1 strength.
- Publication:
-
Physical Review C
- Pub Date:
- May 1978
- DOI:
- 10.1103/PhysRevC.17.1583
- Bibcode:
- 1978PhRvC..17.1583R