skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Population and decay of a K π = 8 two-quasineutron isomer in Pu 244

Abstract

Here, the decay of a K π = 8 isomer in 244Pu and the collective band structures populating the isomer were studied using deep inelastic excitations with 47Ti and 208Pb beams, respectively. Precise measurements of M1/E2 branching ratios in the band confirm a 9/2 [734] νⓍ7/2 +[624] ν configuration assignment for the isomer, validating the systematics of K π = 8 , two-quasineutron isomers observed in even-Z, N = 150 isotones. These isomers around the deformed shell gap at N = 152 provide critical benchmarks for theoretical predictions of single-particle energies in this gateway region to superheavy nuclei.

Authors:
 [1];  [2];  [3];  [4];  [4];  [5];  [4];  [4];  [3];  [4];  [4];  [4];  [4];  [6];  [7];  [4];  [8];  [9];  [3];  [4] more »;  [6];  [10];  [10];  [11];  [4] « less
  1. Univ. of Massachusetts, Lowell, MA (United States); Australian National Univ., Canberra, ACT (Australia)
  2. Univ. of Massachusetts, Lowell, MA (United States); UM-DAE Centre for Excellence in Basic Sciences, Mumbai (India)
  3. Univ. of Massachusetts, Lowell, MA (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States); Univ. of Sofia, Sofia (Bulgaria); Ames Research Lab., Adelphi, MD (United States)
  6. Univ. of Massachusetts, Lowell, MA (United States); Radiation Monitoring Devices, Inc., Watertown, MA (United States)
  7. Univ. of Sofia, Sofia (Bulgaria)
  8. Univ. of Massachusetts, Lowell, MA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  9. Argonne National Lab. (ANL), Argonne, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  10. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States)
  11. Japan Atomic Energy Agency, Ibaraki (Japan)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
OSTI Identifier:
1339580
Alternate Identifier(s):
OSTI ID: 1328619
Grant/Contract Number:  
AC02-06CH11357; FG02-94ER40848; FG02-94ER40834
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 94; Journal Issue: 2; Journal ID: ISSN 2469-9985
Publisher:
APS
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Hota, S. S., Tandel, S. K., Chowdhury, P., Ahmad, I., Carpenter, M. P., Chiara, C. J., Greene, J. P., Hoffman, C. R., Jackson, E. G., Janssens, R. V. F., Kay, B. P., Khoo, T. L., Kondev, F. G., Lakshmi, S., Lalkovski, S., Lauritsen, T., Lister, C. J., McCutchan, E. A., Moran, K., Peterson, D., Shirwadkar, U., Seweryniak, D., Stefanescu, I., Toh, Y., and Zhu, S. Population and decay of a Kπ=8– two-quasineutron isomer in Pu244. United States: N. p., 2016. Web. doi:10.1103/PhysRevC.94.021303.
Hota, S. S., Tandel, S. K., Chowdhury, P., Ahmad, I., Carpenter, M. P., Chiara, C. J., Greene, J. P., Hoffman, C. R., Jackson, E. G., Janssens, R. V. F., Kay, B. P., Khoo, T. L., Kondev, F. G., Lakshmi, S., Lalkovski, S., Lauritsen, T., Lister, C. J., McCutchan, E. A., Moran, K., Peterson, D., Shirwadkar, U., Seweryniak, D., Stefanescu, I., Toh, Y., & Zhu, S. Population and decay of a Kπ=8– two-quasineutron isomer in Pu244. United States. doi:10.1103/PhysRevC.94.021303.
Hota, S. S., Tandel, S. K., Chowdhury, P., Ahmad, I., Carpenter, M. P., Chiara, C. J., Greene, J. P., Hoffman, C. R., Jackson, E. G., Janssens, R. V. F., Kay, B. P., Khoo, T. L., Kondev, F. G., Lakshmi, S., Lalkovski, S., Lauritsen, T., Lister, C. J., McCutchan, E. A., Moran, K., Peterson, D., Shirwadkar, U., Seweryniak, D., Stefanescu, I., Toh, Y., and Zhu, S. Mon . "Population and decay of a Kπ=8– two-quasineutron isomer in Pu244". United States. doi:10.1103/PhysRevC.94.021303. https://www.osti.gov/servlets/purl/1339580.
@article{osti_1339580,
title = {Population and decay of a Kπ=8– two-quasineutron isomer in Pu244},
author = {Hota, S. S. and Tandel, S. K. and Chowdhury, P. and Ahmad, I. and Carpenter, M. P. and Chiara, C. J. and Greene, J. P. and Hoffman, C. R. and Jackson, E. G. and Janssens, R. V. F. and Kay, B. P. and Khoo, T. L. and Kondev, F. G. and Lakshmi, S. and Lalkovski, S. and Lauritsen, T. and Lister, C. J. and McCutchan, E. A. and Moran, K. and Peterson, D. and Shirwadkar, U. and Seweryniak, D. and Stefanescu, I. and Toh, Y. and Zhu, S.},
abstractNote = {Here, the decay of a Kπ = 8– isomer in 244Pu and the collective band structures populating the isomer were studied using deep inelastic excitations with 47Ti and 208Pb beams, respectively. Precise measurements of M1/E2 branching ratios in the band confirm a 9/2–[734]νⓍ7/2+[624]ν configuration assignment for the isomer, validating the systematics of Kπ = 8–, two-quasineutron isomers observed in even-Z, N = 150 isotones. These isomers around the deformed shell gap at N = 152 provide critical benchmarks for theoretical predictions of single-particle energies in this gateway region to superheavy nuclei.},
doi = {10.1103/PhysRevC.94.021303},
journal = {Physical Review C},
number = 2,
volume = 94,
place = {United States},
year = {2016},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Z dependence of the N = 152 deformed shell gap: In-beam γ-ray spectroscopy of neutron-rich Pu 245 , 246
journal, December 2007


Search for a 2-quasiparticle high- K isomer in Rf 256
journal, June 2011


K π = 8 isomers and K π = 2 octupole vibrations in N = 150 shell-stabilized isotones
journal, September 2008


Spectroscopy and single-particle structure of the odd- Z heavy elements 255Lr, 251Md and 247Es
journal, November 2006


Configurations and hindered decays of K isomers in deformed nuclei with A > 100
journal, May 2015

  • Kondev, F. G.; Dracoulis, G. D.; Kibédi, T.
  • Atomic Data and Nuclear Data Tables, Vol. 103-104
  • DOI: 10.1016/j.adt.2015.01.001

Superheavy nuclei from 48Ca-induced reactions
journal, December 2015


High- K structure in Fm 250 and the deformed shell gaps at N = 152 and Z = 100
journal, August 2008


Structure properties of even–even actinides at normal and super deformed shapes analysed using the Gogny force
journal, May 2006


In-beam and decay spectroscopy of transfermium nuclei
journal, October 2008


Rotational bands in odd- A Cm and Cf isotopes: Exploring the highest neutron orbitals
journal, October 2010


Two-quasineutron states in 98 248 Cf and 98 250 Cf and the neutron-neutron residual interactions
journal, July 2008


Pairing and rotational properties of actinides and superheavy nuclei in covariant density functional theory
journal, July 2013


Multi-quasiparticle states in Rf 256
journal, March 2009


New Physics Opportunities at Gammasphere
journal, January 1996


Decay and Fission Hindrance of Two- and Four-Quasiparticle K Isomers in Rf 254
journal, September 2015


K Isomers in No 254 : Probing Single-Particle Energies and Pairing Strengths in the Heaviest Nuclei
journal, August 2006


The GAMMASPHERE
journal, December 1990


Configuration mixing and relative transition rates between low-spin states in 68 Ni
journal, October 2013


Enhanced Stability of Superheavy Nuclei Due to High-Spin Isomerism
journal, June 2004


Shell structure of superheavy nuclei in self-consistent mean-field models
journal, August 1999


In-beam spectroscopy of heavy elements
journal, December 2015


Shell structure of the superheavy elements
journal, December 1996


Investigation of high- K states in 252 No
journal, October 2012


Nuclear isomers in superheavy elements as stepping stones towards the island of stability
journal, August 2006

  • Herzberg, R. -D.; Greenlees, P. T.; Butler, P. A.
  • Nature, Vol. 442, Issue 7105
  • DOI: 10.1038/nature05069