Direct high-precision mass measurements on 241,243Am, 244Pu, and 249Cf

Eibach, Martin; Beyer, Thomas; Blaum, Klaus; Block, Michael; Düllmann, Ch.E.; Eberhardt, K.; Grund, J.; Nagy, Szilard; Nitsche, H.; Nörtershäuser, W.; Renisch, D.; Rykaczewski, K.P.; Schneider, F.; Smorra, Christian; Vieten, J.; Wang, Meng; Wendt, K.

doi:10.1103/PhysRevC.89.064318

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Direct high-precision mass measurements on ^241,243Am, ²⁴⁴Pu, and ²⁴⁹Cf

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Eibach, Martin
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Institut für Kernchemie, Johannes Gutenberg-Universität;

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Beyer, Thomas
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Blaum, Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Nagy, Szilard
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Smorra, Christian
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Wang, Meng
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, Université Paris-Sud;
Institute of Modern Physics;

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http://link.aps.org/doi/10.1103/PhysRevC.89.064318
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Citation

Eibach, M., Beyer, T., Blaum, K., Block, M., Düllmann, C., Eberhardt, K., et al. (2014). Direct high-precision mass measurements on ^241,243Am, ²⁴⁴Pu, and ²⁴⁹Cf. Physical Review C, 89(6): 064318. doi:10.1103/PhysRevC.89.064318.

Cite as: https://hdl.handle.net/11858/00-001M-0000-001A-10AA-F

Abstract

The absolute masses of four long-lived transuranium nuclides, ^241,243Am, ²⁴⁴Pu, and ²⁴⁹Cf, in the vicinity of the deformed N=152 neutron shell closure have been measured directly with the Penning-trap mass spectrometer TRIGA-TRAP. Our measurements confirm the AME2012 mass values of ^241,243Am and ²⁴⁴Pu within one standard deviation, which were indirectly determined, by decay spectroscopy studies. In the case of the²⁴⁹Cf mass, a discrepancy of more than three standard deviations has been observed, affecting absolute masses even in the superheavy element region. The implementation of the mass values into the AME2012 network yields a reduced mass uncertainty for 84 nuclides, particularly for ²⁴⁴Pu and its strongly correlated α decay chains.