Berlin 2001 – scientific programme

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A: Atomphysik

A 12: Posters Thursday (Ion/Atom/Molecule/Surface Scattering)

A 12.47: Poster

Thursday, April 5, 2001, 12:30–15:00, AT3

EXPERIMENTAL VALUES OF AVERAGE CHARGES OF HEAVY IONS TRAVERSING THROUGH DILUTE HYDROGEN — •F.Sh. Abdullin¹, Yu.V. Lobanov¹, Yu.Ts. Oganessian¹, V.K. Utyonkov¹, A.N. Polyakov¹, I.V. Shirokovsky¹, Yu.S. Tsyganov¹, S. Iliev¹, V.G. Subbotin¹, A.M. Sukhov¹, G.V. Buklanov¹, A.N. Mezentsev¹, K. Subotic¹, K.J. Moody², J.F. Wild², N.J. Stoyer², M.A. Stoyer², and R.W. Lougheed² — ¹Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, 141980 Dubna, Russia — ²University of California, Lawrence Livermore National Laboratory, Livermore, California 94551, USA

Average charges <q> of heavy ions with atomic numbers Z = 89 through 116 traversing dilute hydrogen gas at a pressure of about 1 torr with velocity ranging from 1 to 2.6 of the Bohr velocity (2.19×10⁶ m/s) were measured. We observe a linear dependence of the ions average charge on its velocity and a weak dependence on their atomic number Z, in a first approximation. A more detailed analysis of the experimental results shows that the <q> values reflect the influence of the 5f electronic shell.