Relatore
Dr.
Baohua Sun
(GSI Helmholtzzentrum für Schwerionenforschung GmbH)
Descrizione
Baohua Sun for the FRS-ESR mass collaboration
Heavy ion storage rings operated in an isochronous mode and/or equipped with the
phase-shape cooling devices can be used for high-precision, high-sensitivity and
high-efficiency mass measurements of stored nuclei. This has been achieved at GSI
Darmstadt, where two complementary methods, Schottky Mass Spectrometry (SMS) and
Isochronous Mass Spectrometry (IMS) were developed based on the combination of the
fragment separator (FRS) and the storage ring (ESR). So far the storage ring
spectrometry has been successfully used in covering more than 1/3 of known nuclei in
mass measurements [1]. In this contribution, we will discuss the progress on mass
experiments, with emphasis on the new isotopes (236Ac, 224At, 221Po, 222Po, and
213Tl) discovered [2] and the first extension of IMS in isomeric investigation [3]. Recent
developments in the instrumentation like the application of resonant Schottky pick up will
also be briefly reported.
References:
[1] B. Franzke, H. Geissel, and G. Muenzenberg, Mass Spectrom. Rev. 27 (2008) 428.
[2] L. Chen, et al., Phys. Lett. B 691 (2010) 234–237; L. Chen, PhD thesis, JLU Giessen,
2008.
[3] B. Sun, et al., Phys. Lett. B 688 (2010) 294–297
Autore principale
Dr.
Baohua Sun
(GSI Helmholtzzentrum für Schwerionenforschung GmbH)
