Berlin 2001 – scientific programme

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MS: Massenspektrometrie

MS 8: Ion Traps and High Precision Mass Spectrometry

MS 8.2: Talk

Friday, April 6, 2001, 17:00–17:15, EB 202

The SHIPTRAP Project: Measuring the masses of transuranium elements — •Gerrit Marx, Jens Dilling, H.-J. Kluge, Wolfgang Quint, Daniel Rodriguez, Günther Sikler, and Christine Weber — GSI, Planckstr.1, 64291 Darmstadt

SHIPTRAP is an ion trap facility which is being set up to deliver very clean and cool beams of singly-charged recoil ions produced at the SHIP velocity filter at GSI Darmstadt. SHIPTRAP consists of a gas cell for stopping and thermalizing high-energy recoil ions from SHIP, an rf ion guide for extraction of the ions from the gas cell, a linear rf trap for accumulation and bunching of the ions, and a Penning trap for isobaric purification. The physics programme of the SHIPTRAP facility comprises mass spectrometry, nuclear spectroscopy, laser spectroscopy and chemistry of transeinsteinium elements. SHIPTRAP will allow direct measurement of masses of transuranium nuclides. In this contribution the impact of the SHIPTRAP facility, with its capability of systematic mass measurements with high precision, is explored. Rather few masses of nuclides above uranium are presently known experimentally. In the region of nuclides above Z=100 almost no ground state masses were measured directly. SHIPTRAP will play an important role in systematically mapping out this area. Possible candidates for direct mass measurements, even with small or very small production cross sections, are presented.