Direct mass measurements of neutron-deficient 152Sm projectile fragments at the FRS-ESR facility

  • Conference paper
TCP 2006

Abstract

The FRS-ESR facility at GSI provides one of the most efficient methods for direct mass measurements. In the present experiment, exotic nuclei were produced via fragmentation of 152Sm projectiles in a thick beryllium target at 500–600 MeV/u, separated in-flight with the fragment separator FRS, and injected into the storage-cooler ring ESR. Time-resolved Schottky Mass Spectrometry was applied for mass measurements of stored and electron-cooled bare and few-electron ions. 373 different nuclides were identified by means of the spectra of their revolution frequencies. Masses for 18 nuclides (84Zr, 92Ru, 94Rh, 107, 108, 110Sb, 111, 112, 114I, 118Ba, 122,123La, 124Ce, 127Pr, 129Nd, 132Pm, 134Sm, 137Eu) haye been determined for the first time. Masses for 111, 112I and 113Xe have been obtained via known ?-decay energies. The experiment and first results will be presented.

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Litvinov, Y.A. et al. (2007). Direct mass measurements of neutron-deficient 152Sm projectile fragments at the FRS-ESR facility. In: Dilling, J., Comyn, M., Thompson, J., Gwinner, G. (eds) TCP 2006. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73466-6_27

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