Decay spectroscopy of two-quasiparticle K isomers in Cm246,248 via inelastic and transfer reactions

doi:10.1103/PhysRevC.100.034309

This content will become publicly available on September 12, 2020

Title: Decay spectroscopy of two-quasiparticle $K$ isomers in ${}^{246, 248}{Cm}$ 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) K ^π = 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:

^[1]; Tandel, S. K. ^[2]; Chowdhury, P. ^[3]; Khoo, T. L. ^[4];

^[4]; Carpenter, M. P. ^[4];

^[4]; Janssens, R. V. F. ^[5]; Kondev, F. G. ^[4]; Lauritsen, T. ^[4];

^[3];

^[4]; Seweryniak, D. ^[4]; Wang, X. ^[6];

^[7]

Univ. of Massachusetts, Lowell, MA (United States); Radiation Monitoring Devices, Inc., Watertown, MA (United States)
Univ. of Massachusetts, Lowell, MA (United States); UM-DAE Centre for Excellence in Basic Sciences, Mumbai (India)
Univ. of Massachusetts, Lowell, MA (United States)
Argonne National Lab. (ANL), Lemont, IL (United States)
Univ. of North Carolina, Chapel Hill, NC (United States); Duke Univ., Durham, NC (United States)
Argonne National Lab. (ANL), Lemont, IL (United States); California Polytechnic State Univ. (CalPoly), San Luis Obispo, CA (United States)
Argonne National Lab. (ANL), Lemont, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)

Publication Date:: 2019-09-12

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

OSTI Identifier:: 1570446

Grant/Contract Number:: AC02-06CH11357

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

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.

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                    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.

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                    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.

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

Abstract

Citation Formats

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

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journal, November 2006

Shell structure of the heaviest elements
journal, June 1994

The Ame2012 atomic mass evaluation
journal, December 2012