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Title: Parity-Doublet Structure in the $$147\atop{57}$$La 90 nucleus

Abstract

Excited states in 147La, populated in spontaneous fission of 252Cf have been reinvestigated by means of γ spectroscopy, using high-fold γ coincidences measured with Gammasphere array of Ge detectors. The 229.5-keV level, which has been assigned spin-parity 9/2 - in a recent evaluation, is shown to have spin-parity 11/2 -. Consequently, the ground state has spin-parity 5/2 +. Excited levels in 147La have been arranged into a parity-doublet structure, showing that at medium excitation energy the 147La nucleus may have octupole deformation. In conclusion, the B( E1) rates in 147La, which are factor four lower than in 145La, suggest that the electric dipole moment in 147La is depresses by an extra mechanism, probably connected with the population of particular neutron orbitals.

Authors:
 [1];  [1];  [1];  [2];  [2];  [3];  [4];  [4]
  1. Univ. of Warsaw, Warsaw (Poland)
  2. The Univ. of Manchester, Manchester (United Kingdom)
  3. IN2P3-CNRS/Univ. Grenoble Alpes, Grenoble Cedex (France)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1422396
Alternate Identifier(s):
OSTI ID: 1410866
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 96; Journal Issue: 6; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Wisniewski, J., Urban, W., Rzaca-Urban, T., Smith, A. G., Smith, J. F., Simpson, G. S., Ahmad, I., and Greene, J. P. Parity-Doublet Structure in the $147\atop{57}$La90 nucleus. United States: N. p., 2017. Web. doi:10.1103/PhysRevC.96.064301.
Wisniewski, J., Urban, W., Rzaca-Urban, T., Smith, A. G., Smith, J. F., Simpson, G. S., Ahmad, I., & Greene, J. P. Parity-Doublet Structure in the $147\atop{57}$La90 nucleus. United States. doi:10.1103/PhysRevC.96.064301.
Wisniewski, J., Urban, W., Rzaca-Urban, T., Smith, A. G., Smith, J. F., Simpson, G. S., Ahmad, I., and Greene, J. P. Fri . "Parity-Doublet Structure in the $147\atop{57}$La90 nucleus". United States. doi:10.1103/PhysRevC.96.064301. https://www.osti.gov/servlets/purl/1422396.
@article{osti_1422396,
title = {Parity-Doublet Structure in the $147\atop{57}$La90 nucleus},
author = {Wisniewski, J. and Urban, W. and Rzaca-Urban, T. and Smith, A. G. and Smith, J. F. and Simpson, G. S. and Ahmad, I. and Greene, J. P.},
abstractNote = {Excited states in 147La, populated in spontaneous fission of 252Cf have been reinvestigated by means of γ spectroscopy, using high-fold γ coincidences measured with Gammasphere array of Ge detectors. The 229.5-keV level, which has been assigned spin-parity 9/2- in a recent evaluation, is shown to have spin-parity 11/2-. Consequently, the ground state has spin-parity 5/2+. Excited levels in 147La have been arranged into a parity-doublet structure, showing that at medium excitation energy the 147La nucleus may have octupole deformation. In conclusion, the B(E1) rates in 147La, which are factor four lower than in 145La, suggest that the electric dipole moment in 147La is depresses by an extra mechanism, probably connected with the population of particular neutron orbitals.},
doi = {10.1103/PhysRevC.96.064301},
journal = {Physical Review. C, Nuclear Physics},
number = 6,
volume = 96,
place = {United States},
year = {2017},
month = {12}
}

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Works referenced in this record:

First observation of excited states in 87 Se: Collectivity and j 1 anomaly at N = 53
journal, September 2013


Transition probability, B(E2)↑, from the ground to the first-excited 2+ state of even-even nuclides
journal, January 1987


Near-yrast structure of Pr 149
journal, December 2010


Near-yrast, medium-spin structure of Xe 143
journal, June 2011


New level schemes and octupole correlations of light neutron-rich lanthanum isotopes 143,144La
journal, March 2009


Study of spontaneous fission with EUROGAM: Shape transition in A~100 Sr and Zr nuclei
journal, February 1997

  • Urban, W.; Durell, J. L.; Phillips, W. R.
  • Zeitschrift für Physik A Hadrons and Nuclei, Vol. 358, Issue 2
  • DOI: 10.1007/s002180050291

High-spin parity doublets in the nucleus 151Pm
journal, September 1990


A new region of intrinsic reflection asymmetry in nuclei around 145Ba?
journal, March 1985


Low-energy octupole and dipole modes in nuclei
journal, December 1990


Octupole correlation effects in Pm 151
journal, October 1990


A new technique for measuring g factors of excited states in fission fragments using large arrays of Ge detectors
journal, March 2002

  • Patel, D.; Smith, A. G.; Simpson, G. S.
  • Journal of Physics G: Nuclear and Particle Physics, Vol. 28, Issue 4
  • DOI: 10.1088/0954-3899/28/4/306

Nuclear Data Sheets for A = 147
journal, April 2009


Octupole correlations in neutron-rich 1 4 5 , 1 4 7 La nuclei: Coriolis-limit-coupling bands with aligned h 1 1 / 2 proton
journal, March 1999


Unexpected 5 / 2 spin of the ground state in 147 Ba: No octupole deformation in ground states of odd- A Ba isotopes
journal, March 2013


Opposite-parity bands in Eu 153
journal, March 1994


A new high-spin level scheme for 149Nd from a fusion-fission reaction
journal, May 2006


Octupole instability induced by rotation in the nuclei 146,148Nd
journal, January 1988


Gamma rays from fission fragments
journal, November 1995


Neutron-proton multiplets in the odd-odd nucleus Rb 53 37 90
journal, March 2016


Octupole correlations in neutron-rich, even-even barium isotopes
journal, January 1997


New excitations in Ba 142 and Ce 144 : Evolution of γ bands in the N = 86 isotones
journal, June 2017


Yrast excitations in the neutron-rich N = 52 isotones
journal, October 2013


First structure information on the exotic 149 La from the $\beta^-$ -decay of 149 Ba
journal, June 2004


Parities and multipolarities of gamma rays in neutron-rich odd-mass Ba nuclei
journal, August 1996


Medium-spin structure of Cs 145
journal, July 2010


Decay of Ba 143 to levels of the odd-proton N= 86 nuclide La 143
journal, July 1988

  • Faller, Scott H.; Robertson, John D.; Baum, Edward M.
  • Physical Review C, Vol. 38, Issue 1
  • DOI: 10.1103/PhysRevC.38.307

Quasiparticle spectra near the yrast line
journal, September 1979


Octupole correlations in neutron rich, odd- A lanthanum nuclei
journal, August 1996


High-spin octupole correlations in the N = 86, 146Nd and 148Sm nuclei
journal, April 1991


Spins and parities of levels in fission fragments
journal, December 1998

  • Jones, M. A.; Urban, W.; Phillips, W. R.
  • Review of Scientific Instruments, Vol. 69, Issue 12
  • DOI: 10.1063/1.1149257

Direct Evidence for Octupole Deformation in Ba 146 and the Origin of Large E 1 Moment Variations in Reflection-Asymmetric Nuclei
journal, April 2017


Band structure of 149 Ce
journal, July 2012


Octupole deformation properties of the Barcelona-Catania-Paris energy density functionals
journal, March 2010


Evaluation of theoretical conversion coefficients using BrIcc
journal, May 2008

  • Kibédi, T.; Burrows, T. W.; Trzhaskovskaya, M. B.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 589, Issue 2
  • DOI: 10.1016/j.nima.2008.02.051

Reflection symmetry of the near-yrast excitations in 145 Ba
journal, October 2012


Near-yrast structure of N = 93 neutron-rich lanthanide nuclei
journal, February 2010


Near-yrast structure of the La 149 nucleus
journal, September 2007


Octupole deformation in neutron-rich barium isotopes
journal, December 1986


Neutron-proton multiplets in the nucleus Br 88
journal, July 2015


Decay of Cs 145 to levels of Ba 145
journal, September 1986


Search for octupole deformation in neutron-rich Cs nuclei
journal, April 1995


Interplay of valence-shell clusters and the vibrational field in94Mo and95Mo
journal, March 1974


Theory of Collective Excitations in Spherical Odd-Mass Nuclei. III: Electromagnetic Properties of the Anomalous Coupling States
journal, March 1974

  • Kuriyama, A.; Marumori, T.; Matsuyanagi, K.
  • Progress of Theoretical Physics, Vol. 51, Issue 3
  • DOI: 10.1143/PTP.51.779

Direct Evidence of Octupole Deformation in Neutron-Rich Ba 144
journal, March 2016


Evidence for coexistence of reflection asymmetric and symmetric shapes in 150Sm
journal, February 1987


Theory of Collective Excitations in Spherical Odd-Mass Nuclei. II: Structure of the Anomalous Coupling States with Spin
journal, February 1972

  • Kuriyama, Atsushi; Marumori, Toshio; Matsuyanagi, Kenichi
  • Progress of Theoretical Physics, Vol. 47, Issue 2
  • DOI: 10.1143/PTP.47.498

Intrinsic reflection asymmetry in atomic nuclei
journal, April 1996


Neutron single-particle energies in the 132Sn region
journal, July 1999

  • Urban, W.; Kurcewicz, W.; Nowak, A.
  • The European Physical Journal A, Vol. 5, Issue 3
  • DOI: 10.1007/s100500050280

Reinvestigation of high spin states and proposed octupole correlations in Ce 147
journal, October 2014


Microscopic Structure of a New Type of Collective Excitation in Odd-Mass Mo, Ru, I, Cs and La Isotopes
journal, February 1975

  • Kuriyama, A.; Marumori, T.; Matsuyanagi, K.
  • Progress of Theoretical Physics, Vol. 53, Issue 2
  • DOI: 10.1143/PTP.53.489