J. Phys. IV France
Volume 11, Numéro PR2, Juillet 2001
X-Ray Lasers 2000
Page(s) Pr2-271 - Pr2-274
7th International Conference on X-Ray Lasers

J. Phys. IV France 11 (2001) Pr2-271-Pr2-274

DOI: 10.1051/jp4:2001251

Generating inversion on a nuclear transition - photopumping of 103Rh

F. Stedile1, E.E. Fill2, D. Belic1, P. von Brentano3, C. Fransen3, U. Kneissl1, Ch. Kohstall1, A. Linnemann3, P. Matschinsky3, A. Nord1, N. Pietralla3, H.H. Pitz1, M. Scheck1 and V. Werner3

1  Institut für Strahlenphysik, Universität Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
2  Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1,85748 Garching, Germany
3  Institut für Kernphysik, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany

The natural isotope 103Rh has two low-lying levels with energies of 357.4 keV and 295.0 keV, the lifetimes of which are 107 and 9.7 ps, respectively. Thus the lower level has a considerably shorter lifetime than the upper one, a situation favorable for generating population inversion. Nuclear Resonance Fluorescence (NRF) experiments have been performed in which 26 high-lying levels have been identified, from which either the upper or the lower level or both can be populated by radiative decay. An evaluation of the data shows that this "feeding" mechanism indeed resulted in inversion on the 62.4 keV transition.

© EDP Sciences 2001