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Title: First Use of High Charge States for Mass Measurements of Short-Lived Nuclides in a Penning Trap

Abstract

Penning trap mass measurements of short-lived nuclides have been performed for the first time with highly charged ions, using the TITAN facility at TRIUMF. Compared to singly charged ions, this provides an improvement in experimental precision that scales with the charge state q. Neutron-deficient Rb isotopes have been charge bred in an electron beam ion trap to q=8-12+ prior to injection into the Penning trap. In combination with the Ramsey excitation scheme, this unique setup creating low energy, highly charged ions at a radioactive beam facility opens the door to unrivaled precision with gains of 1-2 orders of magnitude. The method is particularly suited for short-lived nuclides such as the superallowed {beta} emitter {sup 74}Rb (T{sub 1/2}=65 ms). The determination of its atomic mass and an improved Q{sub EC} value are presented.

Authors:
; ;  [1];  [2]; ; ; ; ;  [1];  [1];  [3];  [1];  [2];  [1];  [3];  [3];  [1];  [2];  [4];  [5] more »;  [6]; ;  [7];  [8];  [1];  [4];  [1];  [9];  [10] « less
  1. TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3 (Canada)
  2. (Canada)
  3. (Germany)
  4. (United States)
  5. Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6 (Canada)
  6. CSNSM-IN2P3-CNRS, Universite Paris 11, 91405 Orsay (France)
  7. Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany)
  8. Dept. of Physics and Astronomy, Univ. of Manitoba, Winnipeg, MB R3T 2N2 (Canada)
  9. (France)
  10. National Superconducting Cyclotron Lab., Michigan State Univ., East Lansing, Michigan 48824 (United States)
Publication Date:
OSTI Identifier:
21612586
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 107; Journal Issue: 27; Other Information: DOI: 10.1103/PhysRevLett.107.272501; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; CHARGE STATES; ELECTRON BEAMS; EXCITATION; IONS; NEUTRONS; RUBIDIUM 74; TRAPS; BARYONS; BEAMS; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; CHARGED PARTICLES; ELEMENTARY PARTICLES; ENERGY-LEVEL TRANSITIONS; FERMIONS; HADRONS; INTERMEDIATE MASS NUCLEI; ISOTOPES; LEPTON BEAMS; MILLISECONDS LIVING RADIOISOTOPES; NUCLEI; NUCLEONS; ODD-ODD NUCLEI; PARTICLE BEAMS; RADIOISOTOPES; RUBIDIUM ISOTOPES

Citation Formats

Ettenauer, S., Gallant, A. T., Dilling, J., Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Simon, M. C., Chaudhuri, A., Mane, E., Delheij, P., Pearson, M. R., Brunner, T., Physik Department E12, Technische Universitaet Muenchen, D-85748 Garching, Chowdhury, U., Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2, Simon, V. V., Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Ruprecht-Karls-Universitaet, Heidelberg, Brodeur, M., Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, Andreoiu, C., Audi, G., Lopez-Urrutia, J. R. Crespo, Ullrich, J., Gwinner, G., Lapierre, A., National Superconducting Cyclotron Lab., Michigan State Univ., East Lansing, Michigan 48824, Lunney, D., CSNSM-IN2P3-CNRS, Univ. Paris 11, 91405 Orsay, and Ringle, R. First Use of High Charge States for Mass Measurements of Short-Lived Nuclides in a Penning Trap. United States: N. p., 2011. Web. doi:10.1103/PHYSREVLETT.107.272501.
Ettenauer, S., Gallant, A. T., Dilling, J., Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Simon, M. C., Chaudhuri, A., Mane, E., Delheij, P., Pearson, M. R., Brunner, T., Physik Department E12, Technische Universitaet Muenchen, D-85748 Garching, Chowdhury, U., Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2, Simon, V. V., Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Ruprecht-Karls-Universitaet, Heidelberg, Brodeur, M., Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, Andreoiu, C., Audi, G., Lopez-Urrutia, J. R. Crespo, Ullrich, J., Gwinner, G., Lapierre, A., National Superconducting Cyclotron Lab., Michigan State Univ., East Lansing, Michigan 48824, Lunney, D., CSNSM-IN2P3-CNRS, Univ. Paris 11, 91405 Orsay, & Ringle, R. First Use of High Charge States for Mass Measurements of Short-Lived Nuclides in a Penning Trap. United States. doi:10.1103/PHYSREVLETT.107.272501.
Ettenauer, S., Gallant, A. T., Dilling, J., Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Simon, M. C., Chaudhuri, A., Mane, E., Delheij, P., Pearson, M. R., Brunner, T., Physik Department E12, Technische Universitaet Muenchen, D-85748 Garching, Chowdhury, U., Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2, Simon, V. V., Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Ruprecht-Karls-Universitaet, Heidelberg, Brodeur, M., Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, Andreoiu, C., Audi, G., Lopez-Urrutia, J. R. Crespo, Ullrich, J., Gwinner, G., Lapierre, A., National Superconducting Cyclotron Lab., Michigan State Univ., East Lansing, Michigan 48824, Lunney, D., CSNSM-IN2P3-CNRS, Univ. Paris 11, 91405 Orsay, and Ringle, R. 2011. "First Use of High Charge States for Mass Measurements of Short-Lived Nuclides in a Penning Trap". United States. doi:10.1103/PHYSREVLETT.107.272501.
@article{osti_21612586,
title = {First Use of High Charge States for Mass Measurements of Short-Lived Nuclides in a Penning Trap},
author = {Ettenauer, S. and Gallant, A. T. and Dilling, J. and Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1 and Simon, M. C. and Chaudhuri, A. and Mane, E. and Delheij, P. and Pearson, M. R. and Brunner, T. and Physik Department E12, Technische Universitaet Muenchen, D-85748 Garching and Chowdhury, U. and Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2 and Simon, V. V. and Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg and Ruprecht-Karls-Universitaet, Heidelberg and Brodeur, M. and Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1 and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 and Andreoiu, C. and Audi, G. and Lopez-Urrutia, J. R. Crespo and Ullrich, J. and Gwinner, G. and Lapierre, A. and National Superconducting Cyclotron Lab., Michigan State Univ., East Lansing, Michigan 48824 and Lunney, D. and CSNSM-IN2P3-CNRS, Univ. Paris 11, 91405 Orsay and Ringle, R.},
abstractNote = {Penning trap mass measurements of short-lived nuclides have been performed for the first time with highly charged ions, using the TITAN facility at TRIUMF. Compared to singly charged ions, this provides an improvement in experimental precision that scales with the charge state q. Neutron-deficient Rb isotopes have been charge bred in an electron beam ion trap to q=8-12+ prior to injection into the Penning trap. In combination with the Ramsey excitation scheme, this unique setup creating low energy, highly charged ions at a radioactive beam facility opens the door to unrivaled precision with gains of 1-2 orders of magnitude. The method is particularly suited for short-lived nuclides such as the superallowed {beta} emitter {sup 74}Rb (T{sub 1/2}=65 ms). The determination of its atomic mass and an improved Q{sub EC} value are presented.},
doi = {10.1103/PHYSREVLETT.107.272501},
journal = {Physical Review Letters},
number = 27,
volume = 107,
place = {United States},
year = 2011,
month =
}
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  • Mass excesses of short-lived A=2Z-1 nuclei {sup 63}Ge, {sup 65}As, {sup 67}Se, and {sup 71}Kr have been directly measured to be -46 921(37), -46 937(85), -46 580(67), and -46 320(141) keV, respectively. The deduced proton separation energy of -90(85) keV for {sup 65}As shows that this nucleus is only slightly proton unbound. X-ray burst model calculations with the new mass excess of {sup 65}As suggest that the majority of the reaction flow passes through {sup 64}Ge via proton capture, indicating that {sup 64}Ge is not a significant rp-process waiting point.
  • A mass spectrometer has been set up at the on-line isotope separator ISOLDE at CERN/Geneva. Mass-separated radioactive ions are stored in a Penning trap. Their mass is determined by a measurement of the cyclotron frequency in the magnetic field of a superconducting magnet. A resolving power of up to 300.000 and a precision of some 10 keV were determined in case of mass measurements of neutron-deficient RB and Cs isotopes. The resonance of the isobars /sup 88/Sr and /sup 88/Rb were clearly resolved and evidence was obtained for an isomer in /sup 122/Cs.