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HK: Physik der Hadronen und Kerne

HK 29: Kernphysik/Spektroskopie IV

HK 29.7: Vortrag

Mittwoch, 19. März 2003, 15:45–16:00, A

Low-energy spectroscopy of nucleus ⁵⁸Cu — •Alexander Lisetskiy, N. Pietralla, K. Jessen, I. Schneider, A. Schmidt, and P. von Brentano — Institut für Kernphysik, Universität zu Köln, D-50937 Köln

The structure of the nuclei which lie on the N=Z line provides a sensitive test for the isospin symmetry of nuclear forces and effective residual interactions. In odd-odd N=Z nuclei, in contrast to other nuclei, the states with total isospin quantum numbers T=0 and T=1 are in the same energy region, that allows to study them by means of γ-spectroscopy. Recently [1-4] the experimental and theoretical work has been carried out in Cologne for the investigation of the structure of the N=Z odd-odd nuclei ⁴⁶V, ⁵⁰Mn, ⁵⁴Co and ⁵⁸Cu. The data on low spin states in the odd-odd nuclei ⁵⁸Cu investigated with the ⁵⁸Ni(p, nγ)⁵⁸Cu reaction at the FN-tandem accelerator in Cologne are discussed in the present work. The data are compared to full pf-shell model calculations for the positive parity states with new residual GXPF1 interaction and to shell model calculations in the pf_5/2-space with the residual SDI. The manifestation of quasideuteron configurations and an identification of isospin T=0 and T=1 doublets for J^π=2⁺ and J^π=4⁺ in ⁵⁸Cu nucleus are discussed.

[1] I. Schneider et al., Phys. Rev. C 61, 044312 (2000).

[2] P. von Brentano et al., Nucl. Phys. A682 48c (2001).

[3] N. Pietralla et al., Phys. Rev. C 65, 044315 (2002).

[4] A. F. Lisetskiy et al., Phys. Lett. B 512, 290 (2001).