DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Long-lived isomeric states and quasiparticle band structures in neutron-rich 162,164Gd nuclei from β decay

Abstract

Neutron-rich nuclei 162,164Eu were produced by bombarding a proton beam on a 238U target at the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory and mass separating the 162,164Eu products. New level schemes and new γ-ray transitions of the daughters 162,164Gd were identified from β-decay spectroscopy studies. Additionally, half-lives of the 162,164Eu were remeasured to clarify the previous ambiguous results. Two quasiparticle band structures were built and compared with neighboring nuclei. The β and γ bands were extended in 162Gd and a γ band was extended in 164Gd. Half-lives of the isomeric states at (6-) 1449 keV in 162Gd and (4-) 1096 keV in 164Gd were measured to be 99(3) μs and 0.56(3) μs, respectively. Projected shell model calculations were performed and found to be in good agreement with all of the experimental data.

Authors:
ORCiD logo [1];  [1];  [2];  [1];  [3];  [4];  [5];  [1];  [1];  [1];  [1];  [2];  [2];  [6];  [7];  [7];  [2];  [7];  [8];  [9] more »;  [10];  [7];  [2];  [11];  [7];  [12];  [13];  [10];  [9] « less
  1. Vanderbilt Univ., Nashville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of California, Berkeley, CA (United States)
  4. Huzhou Univ. (China)
  5. Shanghai Jiao Tong Univ. (China)
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  7. Univ. of Tennessee, Knoxville, TN (United States)
  8. Louisiana State Univ., Baton Rouge, LA (United States)
  9. Mississippi State Univ., Mississippi State, MS (United States)
  10. Univ. of Warsaw (Poland)
  11. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Warsaw (Poland). Heavy Ion Lab.
  12. Campbell Univ., Buies Creek, NC (United States)
  13. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Warsaw (Poland)
Publication Date:
Research Org.:
Vanderbilt Univ., Nashville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); USDOE National Nuclear Security Administration (NNSA); National Natural Science Foundation of China (NSFC)
OSTI Identifier:
1809134
Alternate Identifier(s):
OSTI ID: 1766381
Grant/Contract Number:  
AC05-00OR22725; FG05-88ER40407; FG02-96ER41006; FG02-96ER40983; NA0002132; U1832139; 11947410; U1932206; 2016YFA0400501
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 103; 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; Beta decay; collective levels; energy levels & level densities; isomer decays; lifetimes & widths; nuclear spin & parity; shell model; 150 ≤ A ≤ 189

Citation Formats

Wang, E. H., Eldridge, J. M., Brewer, N. T., Hamilton, J. H., Batchelder, J. C., Liu, Y. X., Sun, Y., Brown, C., Zachary, C. J., Musangu, B. M., Ramayya, A. V., Rykaczewski, K. P., Gross, C. J., Grzywacz, R., Madurga, M., Miller, D., Stracener, D. W., Jost, C., Zganjar, E. F., Winger, J. A., Karny, M., Paulauskas, S. V., Liu, S. H., Wolińska-Cichocka, M., Padgett, S. W., Mendez, A. J., Miernik, K., Fijałkowska, A., and Ilyushkin, S. V. Long-lived isomeric states and quasiparticle band structures in neutron-rich 162,164Gd nuclei from β decay. United States: N. p., 2021. Web. doi:10.1103/physrevc.103.014317.
Wang, E. H., Eldridge, J. M., Brewer, N. T., Hamilton, J. H., Batchelder, J. C., Liu, Y. X., Sun, Y., Brown, C., Zachary, C. J., Musangu, B. M., Ramayya, A. V., Rykaczewski, K. P., Gross, C. J., Grzywacz, R., Madurga, M., Miller, D., Stracener, D. W., Jost, C., Zganjar, E. F., Winger, J. A., Karny, M., Paulauskas, S. V., Liu, S. H., Wolińska-Cichocka, M., Padgett, S. W., Mendez, A. J., Miernik, K., Fijałkowska, A., & Ilyushkin, S. V. Long-lived isomeric states and quasiparticle band structures in neutron-rich 162,164Gd nuclei from β decay. United States. https://doi.org/10.1103/physrevc.103.014317
Wang, E. H., Eldridge, J. M., Brewer, N. T., Hamilton, J. H., Batchelder, J. C., Liu, Y. X., Sun, Y., Brown, C., Zachary, C. J., Musangu, B. M., Ramayya, A. V., Rykaczewski, K. P., Gross, C. J., Grzywacz, R., Madurga, M., Miller, D., Stracener, D. W., Jost, C., Zganjar, E. F., Winger, J. A., Karny, M., Paulauskas, S. V., Liu, S. H., Wolińska-Cichocka, M., Padgett, S. W., Mendez, A. J., Miernik, K., Fijałkowska, A., and Ilyushkin, S. V. Fri . "Long-lived isomeric states and quasiparticle band structures in neutron-rich 162,164Gd nuclei from β decay". United States. https://doi.org/10.1103/physrevc.103.014317. https://www.osti.gov/servlets/purl/1809134.
@article{osti_1809134,
title = {Long-lived isomeric states and quasiparticle band structures in neutron-rich 162,164Gd nuclei from β decay},
author = {Wang, E. H. and Eldridge, J. M. and Brewer, N. T. and Hamilton, J. H. and Batchelder, J. C. and Liu, Y. X. and Sun, Y. and Brown, C. and Zachary, C. J. and Musangu, B. M. and Ramayya, A. V. and Rykaczewski, K. P. and Gross, C. J. and Grzywacz, R. and Madurga, M. and Miller, D. and Stracener, D. W. and Jost, C. and Zganjar, E. F. and Winger, J. A. and Karny, M. and Paulauskas, S. V. and Liu, S. H. and Wolińska-Cichocka, M. and Padgett, S. W. and Mendez, A. J. and Miernik, K. and Fijałkowska, A. and Ilyushkin, S. V.},
abstractNote = {Neutron-rich nuclei 162,164Eu were produced by bombarding a proton beam on a 238U target at the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory and mass separating the 162,164Eu products. New level schemes and new γ-ray transitions of the daughters 162,164Gd were identified from β-decay spectroscopy studies. Additionally, half-lives of the 162,164Eu were remeasured to clarify the previous ambiguous results. Two quasiparticle band structures were built and compared with neighboring nuclei. The β and γ bands were extended in 162Gd and a γ band was extended in 164Gd. Half-lives of the isomeric states at (6-) 1449 keV in 162Gd and (4-) 1096 keV in 164Gd were measured to be 99(3) μs and 0.56(3) μs, respectively. Projected shell model calculations were performed and found to be in good agreement with all of the experimental data.},
doi = {10.1103/physrevc.103.014317},
journal = {Physical Review C},
number = 1,
volume = 103,
place = {United States},
year = {Fri Jan 22 00:00:00 EST 2021},
month = {Fri Jan 22 00:00:00 EST 2021}
}

Works referenced in this record:

A New Isotope 163Gd; Comments on the Decay of 162Gd
journal, January 1982


New subshell closure at N = 58 emerging in neutron-rich nuclei beyond Ni 78
journal, April 2010


K π = 4 isomers and their rotational bands in Er 168 , 170
journal, October 2003


Projection techniques to approach the nuclear many-body problem
journal, March 2016


Triaxial Projected Shell Model Approach
journal, May 1999


Spin-trap isomers in deformed, odd-odd nuclei in the light rare-earth region near N = 98
journal, July 2020


The AME2016 atomic mass evaluation (II). Tables, graphs and references
journal, March 2017


Identification of a New Isotope, 164Gd
journal, January 1988


β decay of Zn 81 and migrations of states observed near the N = 50 closed shell
journal, December 2010


Two-quasiparticle K -isomeric states in strongly deformed neutron-rich Nd and Sm isotopes: a projected shell-model analysis
journal, July 2010

  • Yang, Ying-Chun; Sun, Yang; Zhu, Sheng-Jiang
  • Journal of Physics G: Nuclear and Particle Physics, Vol. 37, Issue 8
  • DOI: 10.1088/0954-3899/37/8/085110

Identification of levels in 162,164 Gd and decrease in moment of inertia between N = 98–100
journal, October 2004

  • Jones, E. F.; Hamilton, J. H.; Gore, P. M.
  • Journal of Physics G: Nuclear and Particle Physics, Vol. 30, Issue 12
  • DOI: 10.1088/0954-3899/30/12/L02

Reexamining Gamow-Teller decays near Ni 78
journal, April 2016


High- K , two-quasiparticle states in Gd 160
journal, April 2020


Nuclear Ground-State Masses and Deformations
journal, March 1995

  • Moller, P.; Nix, J. R.; Myers, W. D.
  • Atomic Data and Nuclear Data Tables, Vol. 59, Issue 2, p. 185-381
  • DOI: 10.1006/adnd.1995.1002

Source of the Rare-Earth Element Peak in r -Process Nucleosynthesis
journal, September 1997


Nuclear ground-state masses and deformations: FRDM(2012)
journal, May 2016


Isomer Decay Spectroscopy of Sm 164 and Gd 166 : Midshell Collectivity Around N = 100
journal, December 2014


Identification of Four New Neutron-Rich Rare-Earth Isotopes
journal, April 1986


Identification of new neutron-rich rare-earth isotopes produced in Cf 252 fission
journal, May 1987


Collective states and shape competition in 126 Te
journal, April 2017


Lifetime measurements of low-spin negative-parity levels in Gd 160
journal, June 2017


Performance of a total absorption clover detector for Qβ measurements of neutron-rich nuclei far from the β-stability line
journal, May 2014

  • Hayashi, H.; Shibata, M.; Asai, M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 747
  • DOI: 10.1016/j.nima.2014.02.012

New K isomers in the neutron-rich N = 100 isotones Sm 162 ,   Eu 163 , and Gd 164
journal, March 2017


Multiphonon γ -vibrational bands and the triaxial projected shell model
journal, May 2000


Projected Shell Model and High-Spin Spectroscopy
journal, December 1995


A systematical study of neutron-rich Zr isotopes by the projected shell model
journal, May 2011


Nuclear Data Sheets for A = 161
journal, October 2011


Changes of deformed shell gaps at N ∼ 100 in light rare-earth, neutron-rich nuclei
journal, March 2020

  • Liu, Y. X.; Lv, C. J.; Sun, Y.
  • Journal of Physics G: Nuclear and Particle Physics, Vol. 47, Issue 5
  • DOI: 10.1088/1361-6471/ab752d

Nuclear Data Sheets for A = 81
journal, October 2008


Lifetime Measurements for the First 2[sup +] States in [sup 162, 164]Gd Populated by the β Decay of [sup 162, 164]Eu
conference, January 2010

  • Nagae, D.; Ishii, T.; Takahashi, R.
  • INTERNATIONAL SYMPOSIUM ON EXOTIC NUCLEI, AIP Conference Proceedings
  • DOI: 10.1063/1.3431410

Ion source development for the on-line isotope separator at JAEA
journal, October 2008

  • Osa, Akihiko; Ichikawa, Shin-ichi; Matsuda, Makoto
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 266, Issue 19-20
  • DOI: 10.1016/j.nimb.2008.05.063

μ s isomers of Nd 158 , 160
journal, December 2016


Decay spectroscopy of 160 Sm: The lightest four-quasiparticle K isomer
journal, February 2016


Isomer-delayed γ -ray spectroscopy of A = 159 164 midshell nuclei and the variation of K -forbidden E 1 transition hindrance factors
journal, September 2017


β-decay half-lives of new neutron-rich rare-earth isotopes Pm 159 , Sm 162 , and Gd 166
journal, June 2005


Nuclear Data Sheets for A=164
journal, January 2018


Exploring the mass surface near the rare-earth abundance peak via precision mass measurements at JYFLTRAP
journal, March 2020


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

Decay scheme of 162Gd
journal, March 1970


Spectroscopy of neutron-rich Dy 168 , 170 : Yrast band evolution close to the N p N n valence maximum
journal, March 2010


Nuclear Data Sheets for A = 80
journal, June 2005


Low-lying intruder and tensor-driven structures in As 82 revealed by β decay at a new movable-tape-based experimental setup
journal, June 2015


Masses and β -Decay Spectroscopy of Neutron-Rich Odd-Odd Eu 160 , 162 Nuclei: Evidence for a Subshell Gap with Large Deformation at N = 98
journal, May 2018


Impact of Coriolis mixing on a two-quasi-neutron isomer in Gd 100 164 and other N = 100 isotones
journal, June 2018


Nuclear Data Sheets for A = 126
journal, November 2002


Systematic study of multi-quasiparticle K -isomeric bands in tungsten isotopes by the extended projected shell model
journal, June 2017


Identification of a possible proton two-quasiparticle band in Sm 158
journal, December 2014


New Type of Selection Rules in β Decay of Strongly Deformed Nuclei
journal, October 1955


Two-quasiparticle isomers and bands of Nd 154 , 156 and Sm 156 , 158 , 160
journal, August 2009


Nuclear decay studies of fission-product nuclides using an on-line mass separation technique
journal, September 1990

  • Anderl, R. A.; Greenwood, R. C.
  • Journal of Radioanalytical and Nuclear Chemistry Articles, Vol. 142, Issue 1
  • DOI: 10.1007/BF02039463

Nuclear Data Sheets for A = 165
journal, May 2006


States in 160,162 Gd Studied with the (t, p) Reaction
journal, December 1986


Identification of new transitions and levels in Gd 163 from β -decay studies
journal, May 2020


Nuclear Data Sheets for A = 159
journal, January 2012


Excited states in As 82 studied in the decay of Ge 82
journal, September 2014


Properties of strongly neutron-rich isotopes of germanium and arsenic
journal, September 1981


Nuclear Data Sheets for A=82
journal, March 2019