The deformation of the neutron-rich isotopes102Mo and104Mo |
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Authors: | M. Liang H. Ohm B. De Sutter K. Sistemich B. Fazekas G. Molnär |
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Affiliation: | 1. Institut für Kernphysik, Forschungszentrum Jülich, W-5170, Jülich, Federal Republic of Germany 2. Institute of Isotopes, H-1525, Budapest, Hungary
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Abstract: | The half-lives of low-lying levels of the neutron-rich isotopes102Mo and104Mo have been measured at the fission product separator Josef with the ß- - triple coincidence technique. Values of t1/2= 126(4)ps and 0.72(4)ns have been obtained for the 21+ levels at 296 keV and 192 keV in102Mo and104Mo, respectively. Deformation parameters of ßq=0.28(1) and 0.31(1), respectively, are deduced, which are smaller than those of the isotones of Sr and Zr. The interacting boson model accounts well for the trend of 2+ energies in the Mo isotopes but slightly overpredicts the B(E2) values at saturation. A smooth dependence of 21+ vs. E 21+ is found for the A 100 region in agreement with the hydrodynamical model.Dedicated to Prof. Dr. P. Kienle on the occasion of his 60th birthday |
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