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MS: Fachverband Massenspektrometrie

MS 4: Ion Storage Rings

MS 4.3: Talk

Tuesday, March 13, 2012, 11:15–11:30, V57.06

Investigation of heavy neutron-rich nuclides with time-resolved Schottky mass spectrometry — •D. Shubina^1,2, M.W. Reed³, I.J. Cullen³, P.M. Walker³, Yu.A. Litvinov^1,4, K. Blaum¹, F. Bosch⁴, C. Brandau⁴, R.B. Cakirli^1,5, J.J. Carroll^6,7, R.F. Casten⁸, D.M. Cullen⁹, A.Y. Deo³, B. Detwiler⁶, C. Dimopoulou⁴, F. Farinon⁴, H. Geissel^4,10, E. Haettner¹⁰, M. Heil⁴, R.S. Kempley³, R. Knöbel⁴, C. Kozhuharov⁴, J. Kurcewicz⁴, N. Kuzminchuk⁴, S.A. Litvinov⁴, Z. Liu¹¹, R. Mao¹², C. Nociforo⁴, F. Nolden⁴, Z. Patyk⁴, W.R. Plass¹⁰, A. Prochazka⁴, M.S. Sanjari⁴, C. Scheidenberger^4,10, M. Steck⁴, Th. Stöhlker^2,4, B. Sun⁴, T.P.D. Swan³, G. Trees⁶, H. Weick⁴, N. Winckler¹, M. Winkler⁴, P.J. Woods¹¹, and T. Yamaguchi¹³ — ¹MPIK, Heidelberg — ²Heidelberg Uni. — ³Surrey Uni. — ⁴GSI, Darmstadt — ⁵Istanbul Uni. — ⁶YSU, Youngstown — ⁷US Army RL — ⁸Yale Uni. — ⁹Manchester Uni. — ¹⁰Gießen Uni. — ¹¹Edinburgh Uni. — ¹²IMP, Lanzhou — ¹³Saitama Uni.

Neutron-rich heavy nuclides, which were produced by fragmentation of a ¹⁹⁷Au primary beam and separated in the FRS, were investigated with Schottky Mass Spectrometry (SMS) using the GSI ESR. Masses for nine nuclides were measured for the first time: ^181,183Lu, ^185,186Hf, ^187,188Ta, ¹⁹¹W and ^192,193Re. Also, the accuracy of the mass values for three other nuclides (^189,190W and ¹⁹⁵Os) was significantly improved. The new data was used for nuclear structure investigations by studying the behavior of two neutron separation energies, S_2n, and comparing them with the energies of the first excited 2⁺ states.