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Penning trap mass measurements on nobelium isotopes

Abstract : The Penning trap mass spectrometer SHIPTRAP at GSI Darmstadt allows accurate mass measurements of radionuclides, produced in fusion-evaporation reactions and separated by the velocity filter SHIP from the primary beam. Recently, the masses of the three nobelium isotopes (252-254)No were determined. These are the first direct mass measurements of transuranium elements, which provide new anchor points in this region. The heavy nuclides were produced in cold-fusion reactions by irradiating a PbS target with a (48)Ca beam, resulting in production rates of the nuclei of interest of about one atom per second. In combination with data from decay spectroscopy our results are used to perform a new atomic-mass evaluation in this region.
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Submitted on : Wednesday, February 8, 2012 - 5:09:15 PM
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M. Dworschak, M. Block, D. Ackermann, G. Audi, K. Blaum, et al.. Penning trap mass measurements on nobelium isotopes. Physical Review C, American Physical Society, 2010, 81, pp.064312. ⟨10.1103/PhysRevC.81.064312⟩. ⟨in2p3-00667986⟩



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