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21 results on '"Ground state correlation"'

1. Nuclear charge radii of germanium isotopes around N = 40

Author

S.J. Wang, A. Kanellakopoulos, X.F. Yang, S.W. Bai, J. Billowes, M.L. Bissell, K. Blaum, B. Cheal, C.S. Devlin, R.F. Garcia Ruiz, J.Z. Han, H. Heylen, S. Kaufmann, K. König, Á. Koszorús, S. Lechner, S. Malbrunot-Ettenauer, W. Nazarewicz, R. Neugart, G. Neyens, W. Nörtershäuser, T. Ratajczyk, P.-G. Reinhard, L.V. Rodríguez, S. Sels, L. Xie, Z.Y. Xu, D.T. Yordanov, and Y.M. Yu

Subjects
Collinear laser spectroscopy, Nuclear charge radii, Nuclear density functional theory, Ground state correlation, Physics, QC1-999
Abstract

Collinear laser spectroscopy measurements were performed on 68−74Ge isotopes (Z=32) at ISOLDE-CERN, by probing the 4s24p2P13→4s24p5sP1o3 atomic transition (269 nm) of germanium. Nuclear charge radii are determined via the measured isotope shifts, revealing a larger local variation than the neighboring isotopic chains. Nuclear density functional theory with the Fayans functionals Fy(Δr,HFB) and Fy(IVP), and the SV-min Skyrme describes the experimental data for the differential charge radii δ〈r2〉 and charge radii Rc within the theoretical uncertainties. The observed large variation in the charge radii of germanium isotopes is better accounted for by theoretical models incorporating ground state quadrupole correlations. This suggests that the polarization effects due to pairing and deformation contribute to the observed large odd-even staggering in the charge radii of the Ge isotopic chain.

Published
2024
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5. Electron Interactions in Solids

Author

Auerbach, Assa, Birman, Joseph L., editor, Lynn, Jeffrey W., editor, Silverman, Mark P., editor, Stanley, H. Eugene, editor, Voloshin, Mikhail, editor, and Auerbach, Assa

Published
1994
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6. ALPHA CLUSTERING AND MONOPOLE STRENGTHS IN LIGHT NUCLEI.

Author

YAMADA, T., FUNAKI, Y., HORIUCHI, H., IKEDA, K., and TOHSAKI, A.

Subjects
*PARTICLES (Nuclear physics), *MAGNETIC monopoles, *NUCLEAR excitation, *CLUSTER theory (Nuclear physics), *HEAVY ion collisions
Abstract

Strengths of monopole excitation to cluster states are discussed in light nuclei. They are in general so strong to be comparable to the single particle strength and shares an appreciable portion of the sum rule value, in spite of large difference of the structure between the cluster state and the shell-model-like ground state. We point out that the essential reasons of the large strengths are twofold: One is the fact that the clustering degree of freedom is possessed even in simple shell model wave functions (this fact is indicated by Bayman-Bohr theorem), and the other is due to the ground-state correlation induced by the activation of the cluster degree of freedom originally involved in the ground state. They are demonstrated in the case of 16O as a typical light nucleus. The present results imply that the measurement of strong monopole transitions or excitations is generally very useful for the study of cluster states. [ABSTRACT FROM AUTHOR]

Published
2009
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11. Correlation in polymers and interactions between polymers

Author

Ladik, J., Ehlers, J., editor, Hepp, K., editor, Kippenhahn, R., editor, Weidenmüller, H. A., editor, Zittartz, J., editor, André, Jean Marie, editor, Bredas, Jean-Luc, editor, Delhalle, Joseph, editor, Ladik, Janos, editor, Leroy, Georges, editor, and Moser, Carl, editor

Published
1980
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18. The Search for M1 Strength

Author

Hicks, R. S., Peterson, G. A., Petrovich, F., editor, Brown, G. E., editor, Garvey, G. T., editor, Goodman, C. D., editor, Lindgren, R. A., editor, and Love, W. G., editor

Published
1984
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