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Shell-model test of the rotational-model relation between static quadrupole moments Q(2^+_1),B(E2)'s, and orbital M1 transitions

Robinson, S. J. Q. and Escuderos, A. and Zamick, L. and Neumann-Cosel, P. and Richter, A. and Fearick, R. W. (2006):
Shell-model test of the rotational-model relation between static quadrupole moments Q(2^+_1),B(E2)'s, and orbital M1 transitions.
In: Physical Review C, APS, pp. 037306, 73, (3), ISSN 0556-2813, [Online-Edition: http://dx.doi.org/10.1103/PhysRevC.73.037306],
[Article]

Item Type: Article
Erschienen: 2006
Creators: Robinson, S. J. Q. and Escuderos, A. and Zamick, L. and Neumann-Cosel, P. and Richter, A. and Fearick, R. W.
Title: Shell-model test of the rotational-model relation between static quadrupole moments Q(2^+_1),B(E2)'s, and orbital M1 transitions
Language: English
Journal or Publication Title: Physical Review C
Volume: 73
Number: 3
Publisher: APS
Divisions: DFG-Collaborative Research Centres (incl. Transregio)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
05 Department of Physics
05 Department of Physics > Institute of Nuclear Physics
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC) > A: Kernstrukturphysik
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC) > A: Kernstrukturphysik > A2: Kernstrukturphysik mit virtuellen Photonen
Date Deposited: 20 Jun 2011 07:12
Official URL: http://dx.doi.org/10.1103/PhysRevC.73.037306
Identification Number: doi:10.1103/PhysRevC.73.037306
Alternative Abstract:
Alternative abstract Language
In this work, we examine critically the relation between orbital magnetic dipole (scissors mode) strength and quadrupole deformation properties. Assuming a simple K=0 ground-state band in an even-even nucleus, the quantities Q(2<sub>1</sub><sup>+</sup>) (i.e., the static quadrupole moment) and B(E2)01-->21 both are described by a single parameter---the intrinsic quadrupole moment Q0. In the shell model, we can operationally define Q0(static) and Q0(BE2) and see if they are the same. Following a brief excursion to the sd shell, we perform calculations in the fp shell. The nuclei we consider (44,46,48Ti and 48,50Cr) are far from being perfect rotors, but we find that the calculated ratios Q0(static)/Q0(BE2) with an FPD6 interaction are often very large (very close to unity) and far from the simple vibrational limit of zero. The experimental ratios for 46Ti and 48Ti are somewhat smaller (~0.75), but the 50Cr value is larger, exceeding unity. We also discuss the quadrupole collectivity of orbital magnetic dipole transitions. We find that the large orbital B(M1) strength in 44Ti relative to 46Ti and 48Ti cannot be explained by simple deformation arguments.English
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