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Title: Direct determination of the La 138 β -decay Q value using Penning trap mass spectrometry

Abstract

Background: The understanding and description of forbidden decays provides interesting challenges for nuclear theory. These calculations could help to test underlying nuclear models and interpret experimental data. Purpose: Compare a direct measurement of the 138La $$\beta$$-decay $Q$ value with the beta-decay spectrum end-point energy measured by Quarati et al. using LaBr 3 detectors [Appl. Radiat. Isot. 108, 30 (2016)]. Use new precise measurements of the 138La $$\beta$$-decay and electron capture (EC) $Q$ values to improve theoretical calculations of the $$\beta$$-decay spectrum and EC probabilities. Method: High-precision Penning trap mass spectrometry was used to measure cyclotron frequency ratios of 138La, 138Ce and 138Ba ions from which beta-decay and EC Q values for 138La were obtained.Results: The 138La beta-decay and EC Q values were measured to be Q$$_\beta$$ = 1052.42(41) keV and $$Q_{EC}$$ = 1748.41(34) keV, improving the precision compared to the values obtained in the most recent atomic mass evaluation [Wang, et al., Chin. Phys. C 41, 030003 (2017)] by an order of magnitude. These results are used for improved calculations of the 138La $$\beta$$-decay shape factor and EC probabilities. New determinations for the 138Ce 2EC $Q$ value and the atomic masses of 138La, 138Ce, and 138Ba are also reported. Conclusion: The 138La $$\beta$$-decay Q value measured by Quarati et al. is in excellent agreement with our new result, which is an order of magnitude more precise. Uncertainties in the shape factor calculations for 138La $$\beta$$-decay using our new $Q$ value are reduced by an order of magnitude. Uncertainties in the EC probability ratios are also reduced and show improved agreement with experimental data.

Authors:
 [1];  [2];  [3];  [4];  [3];  [5];  [5];  [6];  [5];  [7];  [8];  [9];  [5]
  1. Central Michigan Univ., Mount Pleasant, MI (United States); National Superconducting Cyclotron Lab., East Lansing, MI (United States)
  2. National Superconducting Cyclotron Lab., East Lansing, MI (United States); Facility for Rare Isotope Beams, East Lansing, MI (United States); Michigan State Univ., East Lansing, MI (United States)
  3. Central Michigan Univ., Mount Pleasant, MI (United States)
  4. National Superconducting Cyclotron Lab., East Lansing, MI (United States); Univ. Greifswald, Greifswald (Germany)
  5. National Superconducting Cyclotron Lab., East Lansing, MI (United States); Michigan State Univ., East Lansing, MI (United States)
  6. Alternative Energies and Atomic Energy Commission (CEA), Gif-sur-Yvette Cedex (France). Lab.National Henri Becquerel
  7. Delft Univ. of Technology, Delft (Netherlands)
  8. National Superconducting Cyclotron Lab., East Lansing, MI (United States); Central Michigan Univ., Mount Pleasant, MI (United States)
  9. National Superconducting Cyclotron Lab., East Lansing, MI (United States)
Publication Date:
Research Org.:
Central Michigan Univ., Mount Pleasant, MI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Org.:
National Superconducting Cyclotron Laboratory
OSTI Identifier:
1544566
Alternate Identifier(s):
OSTI ID: 1546434
Grant/Contract Number:  
SC0015927
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 100; Journal Issue: 1; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 138La; beta-decay; Q value; Penning trap

Citation Formats

Sandler, R., Bollen, G., Dissanayake, J., Eibach, M., Gulyuz, K., Hamaker, A., Izzo, C., Mougeot, X., Puentes, D., Quarati, F. G. A., Redshaw, M., Ringle, R., and Yandow, I. Direct determination of the La138β -decay Q value using Penning trap mass spectrometry. United States: N. p., 2019. Web. doi:10.1103/PhysRevC.100.014308.
Sandler, R., Bollen, G., Dissanayake, J., Eibach, M., Gulyuz, K., Hamaker, A., Izzo, C., Mougeot, X., Puentes, D., Quarati, F. G. A., Redshaw, M., Ringle, R., & Yandow, I. Direct determination of the La138β -decay Q value using Penning trap mass spectrometry. United States. doi:10.1103/PhysRevC.100.014308.
Sandler, R., Bollen, G., Dissanayake, J., Eibach, M., Gulyuz, K., Hamaker, A., Izzo, C., Mougeot, X., Puentes, D., Quarati, F. G. A., Redshaw, M., Ringle, R., and Yandow, I. Thu . "Direct determination of the La138β -decay Q value using Penning trap mass spectrometry". United States. doi:10.1103/PhysRevC.100.014308.
@article{osti_1544566,
title = {Direct determination of the La138β -decay Q value using Penning trap mass spectrometry},
author = {Sandler, R. and Bollen, G. and Dissanayake, J. and Eibach, M. and Gulyuz, K. and Hamaker, A. and Izzo, C. and Mougeot, X. and Puentes, D. and Quarati, F. G. A. and Redshaw, M. and Ringle, R. and Yandow, I.},
abstractNote = {Background: The understanding and description of forbidden decays provides interesting challenges for nuclear theory. These calculations could help to test underlying nuclear models and interpret experimental data. Purpose: Compare a direct measurement of the 138La $\beta$-decay $Q$ value with the beta-decay spectrum end-point energy measured by Quarati et al. using LaBr3 detectors [Appl. Radiat. Isot. 108, 30 (2016)]. Use new precise measurements of the 138La $\beta$-decay and electron capture (EC) $Q$ values to improve theoretical calculations of the $\beta$-decay spectrum and EC probabilities. Method: High-precision Penning trap mass spectrometry was used to measure cyclotron frequency ratios of 138La, 138Ce and 138Ba ions from which beta-decay and EC Q values for 138La were obtained.Results: The 138La beta-decay and EC Q values were measured to be Q$_\beta$ = 1052.42(41) keV and $Q_{EC}$ = 1748.41(34) keV, improving the precision compared to the values obtained in the most recent atomic mass evaluation [Wang, et al., Chin. Phys. C 41, 030003 (2017)] by an order of magnitude. These results are used for improved calculations of the 138La $\beta$-decay shape factor and EC probabilities. New determinations for the 138Ce 2EC $Q$ value and the atomic masses of 138La, 138Ce, and 138Ba are also reported. Conclusion: The 138La $\beta$-decay Q value measured by Quarati et al. is in excellent agreement with our new result, which is an order of magnitude more precise. Uncertainties in the shape factor calculations for 138La $\beta$-decay using our new $Q$ value are reduced by an order of magnitude. Uncertainties in the EC probability ratios are also reduced and show improved agreement with experimental data.},
doi = {10.1103/PhysRevC.100.014308},
journal = {Physical Review C},
number = 1,
volume = 100,
place = {United States},
year = {2019},
month = {7}
}

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