Tübingen 2003 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 43: Kernphysik/Spektroskopie VI
HK 43.5: Vortrag
Donnerstag, 20. März 2003, 17:45–18:00, A
Coulomb excitation of neutron deficient Kr isotopes — •Frank Becker1,2,3, N. Amzal4, E. Bouchez3, P.A. Butler4, J.M. Casandjian2, W. Catford5, A. Chatillon3, R.A. Cunningham6, T. Czosnyka7, G. de France2, J. Gerl1, P. Greenlees8, K. Hauschild3,9, K. Helariutta8, R.-D. Herzberg4, A. Hurstel3, J. Iwanicki4,7, D. Jenkins4, G. Jones4, P. Jones8, R. Julin8, W. Korten3, Y. Le Coz3, M. Muikku8, Ch. Schlegel1, G. Sletten10, Ch. Theisen3, C. Timis5, and M. Zielinska7,11 — 1GSI, Darmstadt, Germany — 2GANIL, Caen, France — 3CEA Saclay, France — 4OLL Liverpool, UK — 5University of Surrey, UK — 6Daresbury Laboratory, UK — 7Heavy Ion Laboratory, Warshaw, Poland — 8University of Jyväskylä, Finland — 9CSNSM Orsay, France — 10NBI Copenhagen, Denmark — 11IEP, Warshaw University, Poland
The static electric-quadrupole moment, which directly determines the intrinsic shape of the nucleus, can be measured by Coulomb excitation at energies well below the Coulomb barrier. While the sign of the electric-quadrupole moment determines the prolate or oblate shape of the nucleus, the absolute value gives the size of the deformation and can also indicate a possible mixing between states of different deformation. The neutron deficient Kr isotopes are predicted to be one of the best candidates to investigate the development of shape coexistence. A Coulomb excitation campaign was started with the stable 78Kr isotope measured in Jyväskylä, Finland. Recently, the campaign was continued at GANIL, France. The EXOGAM/SPIRAL device was used to investigate the radioactive ion beams 76Kr and 74Kr. The latest results will be presented.