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Title: Decay spectroscopy of two-quasiparticle K isomers in Cm 246 , 248 via inelastic and transfer reactions

Abstract

The decay of K isomers in Cm (Z = 96) isotopes has been investigated using inelastic and transfer reactions. The half-life of a previously identified 2-quasiparticle (qp) Kπ = 8⁻ isomer in 246Cm has been measured. A new 2-qp isomer is observed in 248Cm, its half-life measured and its decay scheme established. The reduced K hindrances extracted for the decay transitions from the isomers in 246,248Cm suggest K to be a robust quantum number and validate axial symmetry in these nuclei. The excitation energies of the 2-qp isomers in 246Cm (N = 150) and 248Cm (N = 152) confirm the persistence of a deformed subshell gap at N = 152 in the Z ≈ 100 region down to Z = 96 nuclei.

Authors:
ORCiD logo [1];  [2];  [3];  [4]; ORCiD logo [4];  [4]; ORCiD logo [4];  [5];  [4];  [4]; ORCiD logo [3]; ORCiD logo [4];  [4];  [6]; ORCiD logo [7]
  1. Univ. of Massachusetts, Lowell, MA (United States); Radiation Monitoring Devices, Inc., Watertown, MA (United States)
  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), Lemont, IL (United States)
  5. Univ. of North Carolina, Chapel Hill, NC (United States); Duke Univ., Durham, NC (United States)
  6. Argonne National Lab. (ANL), Lemont, IL (United States); California Polytechnic State Univ. (CalPoly), San Luis Obispo, CA (United States)
  7. Argonne National Lab. (ANL), Lemont, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of North Carolina, Chapel Hill, NC (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1570446
Alternate Identifier(s):
OSTI ID: 1659322; OSTI ID: 1659323
Grant/Contract Number:  
AC02-06CH11357; FG02-97ER41041; FG02-97ER41033
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 100; Journal Issue: 3; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Collective levels; Electromagnetic transitions; Isomer decays; Lifetimes & widths; A ≥ 220

Citation Formats

Shirwadkar, U., Tandel, S. K., Chowdhury, P., Khoo, T. L., Ahmad, I., Carpenter, M. P., Greene, J. P., Janssens, R. V. F., Kondev, F. G., Lauritsen, T., Lister, C. J., Peterson, D., Seweryniak, D., Wang, X., and Zhu, S. Decay spectroscopy of two-quasiparticle K isomers in Cm246,248 via inelastic and transfer reactions. United States: N. p., 2019. Web. doi:10.1103/PhysRevC.100.034309.
Shirwadkar, U., Tandel, S. K., Chowdhury, P., Khoo, T. L., Ahmad, I., Carpenter, M. P., Greene, J. P., Janssens, R. V. F., Kondev, F. G., Lauritsen, T., Lister, C. J., Peterson, D., Seweryniak, D., Wang, X., & Zhu, S. Decay spectroscopy of two-quasiparticle K isomers in Cm246,248 via inelastic and transfer reactions. United States. doi:10.1103/PhysRevC.100.034309.
Shirwadkar, U., Tandel, S. K., Chowdhury, P., Khoo, T. L., Ahmad, I., Carpenter, M. P., Greene, J. P., Janssens, R. V. F., Kondev, F. G., Lauritsen, T., Lister, C. J., Peterson, D., Seweryniak, D., Wang, X., and Zhu, S. Thu . "Decay spectroscopy of two-quasiparticle K isomers in Cm246,248 via inelastic and transfer reactions". United States. doi:10.1103/PhysRevC.100.034309. https://www.osti.gov/servlets/purl/1570446.
@article{osti_1570446,
title = {Decay spectroscopy of two-quasiparticle K isomers in Cm246,248 via inelastic and transfer reactions},
author = {Shirwadkar, U. and Tandel, S. K. and Chowdhury, P. and Khoo, T. L. and Ahmad, I. and Carpenter, M. P. and Greene, J. P. and Janssens, R. V. F. and Kondev, F. G. and Lauritsen, T. and Lister, C. J. and Peterson, D. and Seweryniak, D. and Wang, X. and Zhu, S.},
abstractNote = {The decay of K isomers in Cm (Z = 96) isotopes has been investigated using inelastic and transfer reactions. The half-life of a previously identified 2-quasiparticle (qp) Kπ = 8⁻ isomer in 246Cm has been measured. A new 2-qp isomer is observed in 248Cm, its half-life measured and its decay scheme established. The reduced K hindrances extracted for the decay transitions from the isomers in 246,248Cm suggest K to be a robust quantum number and validate axial symmetry in these nuclei. The excitation energies of the 2-qp isomers in 246Cm (N = 150) and 248Cm (N = 152) confirm the persistence of a deformed subshell gap at N = 152 in the Z ≈ 100 region down to Z = 96 nuclei.},
doi = {10.1103/PhysRevC.100.034309},
journal = {Physical Review C},
number = 3,
volume = 100,
place = {United States},
year = {2019},
month = {9}
}

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