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Title: Direct evidence for octupole deformation in Ba 146 and the origin of large E 1 moment variations in reflection-asymmetric nuclei

Abstract

Despite the more than 1 order of magnitude difference between the measured dipole moments in 144Ba and 146Ba, the octupole correlations in 146Ba are found to be as strong as those in 144Ba with a similarly large value of B(E3;3 → 0 +) determined as 48( +21 –29) W.u. Here, the new results not only establish unambiguously the presence of a region of octupole deformation centered on these neutron-rich Ba isotopes, but also manifest the dependence of the electric dipole moments on the occupancy of different neutron orbitals in nuclei with enhanced octupole strength, as revealed by fully microscopic calculations.

Authors:
 [1];  [2];  [3];  [2];  [4];  [4];  [4];  [5];  [5];  [2];  [3];  [6];  [2];  [2];  [6];  [7];  [2];  [8];  [2];  [2] more »;  [2];  [2];  [6];  [2];  [2];  [2];  [2] « less
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Idaho National Lab. (INL), Idaho Falls, ID (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Univ. Autonoma de Madrid, Madrid (Spain)
  5. Univ. of Rochester, Rochester, NY (United States)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  7. Argonne National Lab. (ANL), Argonne, IL (United States); GSI Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  8. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Idaho National Lab. (INL), Idaho Falls, ID (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1353152
Alternate Identifier(s):
OSTI ID: 1351698; OSTI ID: 1365825; OSTI ID: 1372268; OSTI ID: 1379808
Report Number(s):
LLNL-JRNL-716436; INL/JOU-17-40819
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:
AC52-07NA27344; AC02-06CH11357; AC07-05ID14517; AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 15; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; barium; CARIBU; CHICO2; Coulomb excitation; dipole; E3 transitions; GRETINA; octupole

Citation Formats

Bucher, B., Zhu, S., Wu, C. Y., Janssens, R. V. F., Bernard, R. N., Robledo, L. M., Rodríguez, T. R., Cline, D., Hayes, A. B., Ayangeakaa, A. D., Buckner, M. Q., Campbell, C. M., Carpenter, M. P., Clark, J. A., Crawford, H. L., David, H. M., Dickerson, C., Harker, J., Hoffman, C. R., Kay, B. P., Kondev, F. G., Lauritsen, T., Macchiavelli, A. O., Pardo, R. C., Savard, G., Seweryniak, D., and Vondrasek, R. Direct evidence for octupole deformation in Ba146 and the origin of large E1 moment variations in reflection-asymmetric nuclei. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.118.152504.
Bucher, B., Zhu, S., Wu, C. Y., Janssens, R. V. F., Bernard, R. N., Robledo, L. M., Rodríguez, T. R., Cline, D., Hayes, A. B., Ayangeakaa, A. D., Buckner, M. Q., Campbell, C. M., Carpenter, M. P., Clark, J. A., Crawford, H. L., David, H. M., Dickerson, C., Harker, J., Hoffman, C. R., Kay, B. P., Kondev, F. G., Lauritsen, T., Macchiavelli, A. O., Pardo, R. C., Savard, G., Seweryniak, D., & Vondrasek, R. Direct evidence for octupole deformation in Ba146 and the origin of large E1 moment variations in reflection-asymmetric nuclei. United States. doi:10.1103/PhysRevLett.118.152504.
Bucher, B., Zhu, S., Wu, C. Y., Janssens, R. V. F., Bernard, R. N., Robledo, L. M., Rodríguez, T. R., Cline, D., Hayes, A. B., Ayangeakaa, A. D., Buckner, M. Q., Campbell, C. M., Carpenter, M. P., Clark, J. A., Crawford, H. L., David, H. M., Dickerson, C., Harker, J., Hoffman, C. R., Kay, B. P., Kondev, F. G., Lauritsen, T., Macchiavelli, A. O., Pardo, R. C., Savard, G., Seweryniak, D., and Vondrasek, R. Wed . "Direct evidence for octupole deformation in Ba146 and the origin of large E1 moment variations in reflection-asymmetric nuclei". United States. doi:10.1103/PhysRevLett.118.152504. https://www.osti.gov/servlets/purl/1353152.
@article{osti_1353152,
title = {Direct evidence for octupole deformation in Ba146 and the origin of large E1 moment variations in reflection-asymmetric nuclei},
author = {Bucher, B. and Zhu, S. and Wu, C. Y. and Janssens, R. V. F. and Bernard, R. N. and Robledo, L. M. and Rodríguez, T. R. and Cline, D. and Hayes, A. B. and Ayangeakaa, A. D. and Buckner, M. Q. and Campbell, C. M. and Carpenter, M. P. and Clark, J. A. and Crawford, H. L. and David, H. M. and Dickerson, C. and Harker, J. and Hoffman, C. R. and Kay, B. P. and Kondev, F. G. and Lauritsen, T. and Macchiavelli, A. O. and Pardo, R. C. and Savard, G. and Seweryniak, D. and Vondrasek, R.},
abstractNote = {Despite the more than 1 order of magnitude difference between the measured dipole moments in 144Ba and 146Ba, the octupole correlations in 146Ba are found to be as strong as those in 144Ba with a similarly large value of B(E3;3– → 0+) determined as 48(+21–29) W.u. Here, the new results not only establish unambiguously the presence of a region of octupole deformation centered on these neutron-rich Ba isotopes, but also manifest the dependence of the electric dipole moments on the occupancy of different neutron orbitals in nuclei with enhanced octupole strength, as revealed by fully microscopic calculations.},
doi = {10.1103/PhysRevLett.118.152504},
journal = {Physical Review Letters},
number = 15,
volume = 118,
place = {United States},
year = {Wed Apr 12 00:00:00 EDT 2017},
month = {Wed Apr 12 00:00:00 EDT 2017}
}

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