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

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.

doi:10.1103/PhysRevC.100.034309

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

Journal Article · Thu Sep 12 00:00:00 EDT 2019 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.100.034309· OSTI ID:1570446

^[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)

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.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of North Carolina, Chapel Hill, NC (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-06CH11357; FG02-97ER41041; FG02-97ER41033

OSTI ID:: 1570446

Alternate ID(s):: OSTI ID: 1659322; OSTI ID: 1659323

Journal Information:: Physical Review C, Vol. 100, Issue 3; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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