First prompt in-beam gamma-ray spectroscopy of a superheavy element: the 256Rf
Rubert, J., Dorvaux, O., Gall, B., Greenlees, P., Asfari, Z., Piot, J., . . . Venhart, M. (2013). First prompt in-beam gamma-ray spectroscopy of a superheavy element: the 256Rf. In 11th International Conference on Nucleus-Nucleus Collisions (NN2012), 27 May to 1 June 2012, San Antonio, Texas, USA (pp. 012010). Journal of Physics: Conference Series (420). Bristol: Institute of Physics. doi:10.1088/1742-6596/420/1/012010
Published inJournal of Physics: Conference Series;420
Piot, J. |
Asai, M. |
Parr, E. |
© Published under licence by IOP Publishing Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY) licence.
Using state-of-the-art γ-ray spectroscopic techniques, the first rotational band of a superheavy element, extending up to a spin of 20 ¯h, was discovered in the nucleus 256Rf. To perform such an experiment at the limits of the present instrumentation, several developments were needed. The most important of these developments was of an intense isotopically enriched 50Ti beam using the MIVOC method. The experimental set-up and subsequent analysis allowed the 256Rf ground-state band to be revealed. The rotational properties of the band are discussed and compared with neighboring transfermium nuclei through the study of their moments of inertia. These data suggest that there is no evidence of a significant deformed shell gap at Z = 104.