STUDY ON GAMOW-TELLER TRANSITION STRENGTHS IN A = 26 ISOBARS USING CHARGE EXCHANGE REACTION

NGUYEN TUAN KHAI 1, TRAN DUC THIEP1, Y. FUJITA 2, T. ADACHI2
1 Institute of Physics, P.O.Box 429, Boho 10000, Hanoi, Vietnam
2 Research Center for Nuclear Physics, Osaka University, Ibaraki 567-0047, Japan

Main Article Content

Abstract

Isospin is a good quantum number to study isospin symmetry in isobars under the assumption that the nuclear interaction is charge symmetric. For A = 26 isobar triplet this symmetry is expected for the Tz = ±1 → 0 isobaric analogous transitions in , where Tz is the z component of isospin T and is defined by Tz = (N – Z) / 2. The isospin symmetric Tz = -1 → 0 Gamow-Teller (GT) transitions can be determined in the 26Si β decay. Assuming this symmetry it is possible to study the GT transition strengths for high excited states in 26Al induced by the (3He, t) charge-exchange (CE) reaction at intermediate energies (> 100 MeV/nucleon) and at forward scattering angles including 0o, where Tz = +1 → 0 GT transitions from the Jπ = 0+ ground state of 26Mg to the Jπ = 1+ excited states in 26Al were extended to the excitation energy (Ex) of 9 MeV.

Article Details

References

1. Isospin in Nuclear Physics, edited by D. H. Wilkinson, North-Holland, Amsterdam, 1969.
2. Y. Fujita et al., Phys. Rev. C 59, (1999) 90.
3. T. N. Taddeucci et al., Nucl. Phys. A469, (1987) 125.
4. P.M. Endt, Nucl. Phys. A521, (1990)1; A633 (1998) 1.
5. I. Towner et al., in Proceedings of the International Conference on the Exotic Nuclei and Atomic Masses, ENAM95, Arles, 1995, Editions Frontieres, Gif-sur-Yvette, 1996, p.711.
6. I. S. Towner and J.C. Hardy, Phys. Rev. C 66, 035501 (2002).
7. D.H. Wilkinson and B.E.F. Macefield, Nucl. Phys. A232, (1974) 58.
8. K. Schreckenbach et al., Phys. Lett. B 349, (1995) 427.
9. M. Fujiwara et al., Nucl. Instrum. Methods Phys. Res. A 422 (1999) 484.
10. H. Fujita et al., Nucl. Instrum. Methods Phys. Res. A 469 (2001) 55.