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HK: Fachverband Hadronen und Kerne

HK 67: Poster Session

HK 67.13: Poster

Thursday, March 19, 2009, 14:00–16:00, Audi-Max

Proton scattering at ⁹²Zr and the investigation of a possible g-boson configuration — •Christopher Walz, Oleksiy Burda, Peter von Neumann-Cosel, and Norbert Pietralla — IKP, TU Darmstadt, Germany

The concept of fully symmetric (FS) and mixed-symmetric (MS) quadrupol phonons as building blocks of low-energy structure in spherical nuclei has been investigated in recent years. The nucleus ⁹²Zr is a well studied example and candidates for the FS and MS quadrupol one-phonon states with J^Π=2⁺ have already been established [1]. High-resolution-⁹²Zr(p,p’) experiments at 200 MeV were performed at the iThemba LABS in order to study the excitations of low-spin states. The evaluation of the measured cross sections as a function of momentum transfer had supported the one-phonon interpretation of symmetric and mixed-symmetric 2⁺ states. In addition the measured momentum-transfer dependence of (p,p’) cross sections permits a test of the nature of the 4₁⁺ and 4₂⁺ states as candidates of possible g-boson configuration with preclominant FS and MS character. Comparisons to QPM and shell model calculations is presented.

[1] C.Fransen et al, Phys. Rev. C 71, 054304 (2005)