8–10 Dec 2010
CERN
Europe/Zurich timezone

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

8 Dec 2010, 12:05
20m
503/1-001 - Council Chamber (CERN)

503/1-001 - Council Chamber

CERN

162
Show room on map

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)

Presentation materials