Freiburg 1999 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 32: Postersitzung / Kernphysik
HK 32.7: Poster
Wednesday, March 24, 1999, 10:15–12:00, Foyer
A new measurement of the magnetic moment of the 52Cr(2+) state+ — •R. Ernst1, K.-H. Speidel1, A. Gohla1, O. Kenn1, U. Nachum1, J. Gerber2, P. Maier-Komor3, G. Jakob4, N. Benzcer-Koller4, G. Kumbartzki4, and L. Zamick4 — 1Inst. für Strahlen- und Kernphysik, Univ. Bonn, D-53115 Bonn — 2Inst. de Recherches Subatomique, F-67037 Strasbourg, France — 3Physik-Dept. TU-München, D-85748 Garching — 4Dept. of Physics & Astronomy, Rutgers Univ., USA
The motivation for this measurement was the poor accuracy of the existing data from essentially one former experiment in which the conventional transient field (TF) technique was applied[1]. The deduced g-factor value g=1.50(25) reflects the dominant role of f7/2 proton configurations in this nucleus with closed neutron f7/2 shell (N=28) and four protons (holes) in the same shell (Z=24). Recent large scale shell model calculations [2] require substantial contributions of excited fp-shell orbitals to describe the structure of several nuclei in this mass region. From this work the g-factor of the 52Cr(2+) state ought to be g=1.366 which still agrees with the known value due to its large error. In the present measurement the 52Cr(2+) state was populated by Coulomb excitation of a 120 MeV 52Cr beam with a carbon target employing inverse kinematics and the TF in Gd. The deduced g-factor g=1.215(75) demonstrates the importance of excited fp-shell orbitals in the wavefunction as emphasized by the shell model calculations. A preliminary result of the g-factor of the 4+ state tends to be larger than that of the 2+ state.
[1] A.E. Stuchbery et al., Hyp. Int. 36(1987)75
[2] H. Nakada et al., Nucl. Phys. A571(1994)467 +supported by BMBF under 06 BN 816