Magnetic moments of the first excited 2${}^{+}$ states in the semi-magic ${}^{112,114,116,122,124}$Sn isotopes

Magnetic moments of the first excited 2 $^{+}$ states in the semi-magic $^{112, 114, 116, 122, 124}$ Sn isotopes

J. Walker, A. Jungclaus, J. Leske, K.-H. Speidel, A. Ekström, P. Boutachkov, J. Cederkäll, P. Doornenbal, J. Gerl, R. Gernhäuser, N. Goel, M. Górska, I. Kojouharov, P. Maier-Komor, V. Modamio, F. Naqvi, N. Pietralla, S. Pietri, W. Prokopowicz, H. Schaffner, R. Schwengner, and H.-J. Wollersheim

Phys. Rev. C 84, 014319 – Published 19 July 2011

Abstract

The $g$ factors of the first excited 2 $^{+}$ states in the $^{112, 114, 116, 122, 124}$ Sn isotopes have been measured with high accuracy using the transient field technique in combination with Coulomb excitation in inverse kinematics. The experimental results are discussed in a qualitative way on the basis of empirical single-particle $g$ factors of the relevant proton and neutron orbitals and are compared to a number of different theoretical calculations. The results are found to be best described by shell-model calculations in an extended configuration space. Clear evidence for the contribution of neutron pair excitations from the 1 $d_{3 / 2}$ to the 0 $h_{11 / 2}$ orbital to the wave function of the 2 $_{1}^{+}$ state in $^{122, 124}$ Sn has been obtained.

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Received 5 April 2011

DOI:https://doi.org/10.1103/PhysRevC.84.014319

Authors & Affiliations

J. Walker^1,2, A. Jungclaus¹, J. Leske³, K.-H. Speidel⁴, A. Ekström^5,*, P. Boutachkov⁶, J. Cederkäll⁵, P. Doornenbal^7,†, J. Gerl⁶, R. Gernhäuser⁸, N. Goel⁶, M. Górska⁶, I. Kojouharov⁶, P. Maier-Komor⁸, V. Modamio¹, F. Naqvi^6,9, N. Pietralla³, S. Pietri⁶, W. Prokopowicz⁶, H. Schaffner⁶, R. Schwengner¹⁰, and H.-J. Wollersheim⁶

¹Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain
²Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
³Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
⁴Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, D-53115 Bonn, Germany
⁵Department of Physics, Lund University, S-22100 Lund, Sweden
⁶Gesellschaft für Schwerionenforschung, D-64291 Darmstadt, Germany
⁷RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
⁸Physik Department E12, Technische Universität München, D-85748 Garching, Germany
⁹Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
¹⁰Institut für Strahlenphysik, Helmholtz-Zentrum Dresden Rossendorf, D-01314 Dresden, Germany

^*Present address: Department of Physics, University of Oslo, Oslo, Norway.
^†Present address: RIKEN, Nishina Center, Wako, Saitama, Japan.

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Vol. 84, Iss. 1 — July 2011

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