Magnetic dipole moment of the Coulomb excited 2+1 state in

ISOLDE Workshop and Users meeting 2010
Contribution ID : 21
Type : Accepted
Magnetic dipole moment of the Coulomb excited 2+1
state in 138Xe - final report from IS415 and future of
the Transient Field technique at REX-ISOLDE
Wednesday, 8 December 2010 12:05 (20)
The isospin structure of nuclear excited states would preferably be investigated by observables which are
most sensitive to it, e.g. nuclear magnetic moments. IS415 has started as one of the first attempts to measure
the magnetic dipole moments of short-lived excited nuclear states at radioactive ion-beam facilities. We will
report on the result obtained from this experimental campaign on the g(2+1) factor in unstable neutron rich
138Xe using Coulomb excitation and the low-velocity Transient Field technique. The impact of the experimental result will be discussed with respect to the observed reduction in the electrical quadrupole transitions
probability in its isotone 136Te [1] where shell model calculations using realistic effective interactions have
failed to describe the experimental behaviour [1]. On the other hand QRPA calculations could trace the origin
of the observed trend to the reduction of the neutron pairing gap above N = 82 [2]. Future applications of the
technique will be presented as well as an outlook for HIE-ISOLDE. [1] D. C. Radford et al., Phys. Rev. Lett.
88, 222501 (2002), Nuclear Physics A 752, 264 (2005) [2] J. Teresaki et al., Phys. Rev. C.66, 054313 (2002)
Summary
Primary author(s) : Joerg Leske (IKP, TU Darmstadt, Schlossgartenstrasse 9, D-64289 Darmstadt, Germany)
Co-author(s) : Andrea Jungclaus (Instituta de Estructura de la Materia, CSIS, Serrano 113bis, E-28006 Madrid,
Spain); Karl-Heinz Speidel (HISKP, Uni Bonn, Nussallee 14-16, D-53115 Bonn, Germany); Norbert Pietralla (IKP,
TU Darmstadt, Schlossgartenstrasse 9, D-64289 Darmstadt, Germany)
Presenter(s) : Joerg Leske (IKP, TU Darmstadt, Schlossgartenstrasse 9, D-64289 Darmstadt, Germany)
Session Classification : Moments and Masses