Speaker
Joerg Leske
(IKP, TU Darmstadt, Schlossgartenstrasse 9, D-64289 Darmstadt, Germany)
Description
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)
Author
Joerg Leske
(IKP, TU Darmstadt, Schlossgartenstrasse 9, D-64289 Darmstadt, Germany)
Co-authors
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)