Journalartikel

Jahr der Veröffentlichung: 1998

Seiten: 139-155

Zeitschrift: Nuclear Physics A: Nuclear and Hadronic Physics

Bandnummer: 636

Heftnummer: 2

ISSN: 0375-9474

DOI Link: https://doi.org/10.1016/S0375-9474(98)00213-9

Verlag: Elsevier

Abstract: 
Results of a Cr-nat(gamma, gamma') experiment at the S-DALINAC are reported for energies up to 7 MeV utilizing a Euroball Cluster detector. The excitation of a J = 1 state at 5544 keV is observed which is believed to belong to Cr-52 because of the strength of the signal and the large natural abundance. By a variety of empirical arguments a quadrupole-octupole-coupled two-phonon 1(-) character is suggested for this transition. Quasiparticle random-phase-approximation (QRPA) calculations are able to reproduce the energy and B(E1) transition strength remarkably well. The underlying microscopic structure is suggested to be more complex than a pure two-phonon picture. Furthermore, the calculations indicate a pure neutron (2p(3/2)(-1)2p(1/2)) magnetic dipole structure for an excitation experimentally seen at 5098 keV which would provide a direct measure of ground-state correlations in Cr-52. (C) 1998 Elsevier Science B.V.

Harvard-Zitierstil: Enders, J., von Brentano, P., Eberth, J., Herzberg, R., Huxel, N., Lenske, H., et al. (1998) Photon scattering off ⁵²Cr:: Two-phonon E1 strength at the N=28 shell closure?, Nuclear Physics A: Nuclear and Hadronic Physics, 636(2), pp. 139-155. https://doi.org/10.1016/S0375-9474(98)00213-9

APA-Zitierstil: Enders, J., von Brentano, P., Eberth, J., Herzberg, R., Huxel, N., Lenske, H., von Neumann-Cosel, P., Nicolay, N., Pietralla, N., Prade, H., Reif, J., Richter, A., Schlegel, C., Schwengner, R., Skoda, S., Thomas, H., Wiedenhover, I., Winter, G., & Zilges, A. (1998). Photon scattering off ⁵²Cr:: Two-phonon E1 strength at the N=28 shell closure?. Nuclear Physics A: Nuclear and Hadronic Physics. 636(2), 139-155. https://doi.org/10.1016/S0375-9474(98)00213-9