Quadrupole and octupole collectivity in 143Ba

Morse, C.; Macchiavelli, A. O.; Crawford, H. L.; Zhu, Shaofei H.; Wu, C. Y.; Wang, Y. Y.; Meng, J.; Back, B. B.; Bucher, B.; Cambell, C. M.; Carpenter, M. P.; Chen, J.; Clark, R. M.; Cromaz, M.; Fallon, P.; Henderson, J.; Janssens, R. V. F.; Jones, M. D.; Khoo, T. L.; Kondev, F. G.; Lauritsen, T.; Lee, I. Y.; Li, J.; Potterveld, D.; Santamaria, C.; Savard, G.; Seweryniak, D.; Stolze, S.; Weisshaar, D.

doi:10.1103/PhysRevC.102.054328

Title: Quadrupole and octupole collectivity in ¹⁴³Ba

Journal Article · Wed Nov 25 00:00:00 EST 2020 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.102.054328· OSTI ID:1716789

Morse, C. ^[1]; Macchiavelli, A. O. ^[1]; Crawford, H. L. ^[1]; Zhu, Shaofei H. ^[2]; Wu, C. Y. ^[3]; Wang, Y. Y. ^[4]; Meng, J. ^[5]; Back, B. B. ^[6]; Bucher, B. ^[7]; Cambell, C. M. ^[1]; Carpenter, M. P. ^[6]; Chen, J. ^[6]; Clark, R. M. ^[1]; Cromaz, M. ^[1]; Fallon, P. ^[1]; Henderson, J. ^[3]; Janssens, R. V. F. ^[8]; Jones, M. D. ^[9]; Khoo, T. L. ^[6]; Kondev, F. G. ^[6] more »

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Argonne National Lab. (ANL), Lemont, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Peking Univ., Beijing (China)
Peking Univ., Beijing (China); Kyoto Univ. (Japan)
Argonne National Lab. (ANL), Lemont, IL (United States)
Duke Univ., Durham, NC (United States)
Univ. of North Carolina, Chapel Hill, NC (United States); Duke Univ., Durham, NC (United States)
Univ. of North Carolina, Chapel Hill, NC (United States)
Michigan State Univ., East Lansing, MI (United States)

The neutron-rich barium nuclei have been the subject of intense interest due to the enhanced octupole correlations they are predicted to exhibit. The observation of enhanced octupole collectivity in Ba-144,Ba-146 as measured in sub-barrier Coulomb excitation, consistent with static octupole deformation, has further heightened this interest. In the present work, these studies are extended to the neighboring odd-mass Ba-143 to investigate the interplay between single-particle and collective octupole degrees of freedom. A new measurement of the first 9(-)/2-state lifetime is also presented. Reflection-Asymmetric Triaxial Particle Rotor Model calculations indicate that the negative-parity bands in Ba-143 can be understood as a decoupled structure of nu h(9/2) parentage, while the positive-parity bands are built on a decoupled octupole phonon. No evidence for E3 excitation is observed in this work, but an upper limit is placed on the E3 matrix element to the lowest octupole band.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States); University of North Carolina, Chapel Hill, NC (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE National Nuclear Security Administration (NNSA); National Natural Science Foundation of China (NSFC); National Key Research and Development Program of China

Grant/Contract Number:: SC0012704; AC52-07NA27344; AC02-05CH11231; AC02-06CH11357; AC02-98CH10886; FG02-97ER41041; FG02-97ER41033; 11875075; 11935003; 11975031; 11621131001; 2018YFA0404400; 2017YFE0116700

OSTI ID:: 1716789

Alternate ID(s):: OSTI ID: 1724328; OSTI ID: 1763894; OSTI ID: 1764020; OSTI ID: 1827661

Report Number(s):: BNL-220610-2020-JAAM; LLNL-JRNL-814047; TRN: US2204777

Journal Information:: Physical Review C, Vol. 102, Issue 5; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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