Skyrme mean-field study of rotational bands in transfermium isotopes

Bender, M.; Bonche, P.; Duguet, Thomas; Heenen, Paul‐Henri

doi:10.1016/s0375-9474(03)01081-9

Cited by 105 publications

(92 citation statements)

References 35 publications

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“…If such an isomer were indeed absent, or had a half life 6 orders of magnitude shorter than predicted, it would imply an abrupt shape change and, hence, termination at Z = 104 of a description which works remarkably well from Z = 92 -103. Such an abrupt termination would contradict theoretical predictions [9][10][11] and does not seem likely. The 5 − decay to the ground band would be relatively fast, < 4µs for f ν up to 600.…”

Section: Possibility That the 8 − 2-qp State Is Not Isomericmentioning

confidence: 76%

“…The inevitable consequence is that there is an abrupt termination in Rf at Z=104 of a description of a nucleus with axially-symmetric prolate deformation, which works remarkably well for nuclei from U to Lr (Z = 92 to 103). This interpretation is disfavored as it would contradict all predictions [9][10][11] based on different theoretical approaches and would involve a sudden breakdown of a highly successful model. [4,5], is almost a necessity.…”

Section: Discussionmentioning

confidence: 99%

“…This region extends from uranium (Z = 92) to lawrencium (Z = 103), with the β 2 deformation changing little (∆β 2 ∼ 0.02) from U to No. It is not unreasonable to expect that Rf (Z =104) nuclei would also be prolate, as predicted in all theoretical approaches [9][10][11]. The clustering of high-K orbitals near the Fermi level should give rise to isomers.…”

mentioning

confidence: 88%

See 2 more Smart Citations

Search for a 2-quasiparticle high-Kisomer inRf256

Robinson¹,

Khoo²,

Seweryniak³

et al. 2011

Phys. Rev. C

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The energies of 2-quasiparticle (qp) states in heavy shell-stabilized nuclei provide information on the single-particle states that are responsible for the stability of superheavy nuclei. We have calculated the energies of 2-qp states in 256 Rf, which suggest that a long-lived, low-energy 8 − isomer should exist. A search was conducted for this isomer through a calorimetric conversion electron signal, sandwiched in time between implantation of a 256 Rf nucleus and its fission decay, all within the same pixel of a double-sided Si strip detector. A 17(5) µs isomer was identified. However, its low population, ∼5(2)% that of the ground-state instead of the expected ∼30%, suggests that it is more likely a 4-qp isomer. Possible reasons for the absence of an electromagnetic signature of a 2-qp isomer decay are discussed. These include the favored possibility that the isomer decays by fission, with a half life indistinguishably close to that of the ground state. Another possibility, that there is no 2-qp isomer at all, would imply an abrupt termination of axially-symmetric deformed shapes at Z = 104, which describes nuclei with Z= 92 -103 very well.

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Section: Possibility That the 8 − 2-qp State Is Not Isomericmentioning

confidence: 76%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Search for a 2-quasiparticle high-Kisomer inRf256

Robinson¹,

Khoo²,

Seweryniak³

et al. 2011

Phys. Rev. C

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show abstract

“…We calculated the low-lying levels of odd platinum isotopes 193,195,197,199 Pt by the self-consistent Hartree-FockBogoliubov (HFB) model plus one-quasiparticle excitation built on an even-even HFB vacuum [38]. The SkM * [39] Skyrme energy density functional with time-odd terms and surface-type δ pairing is used.…”

Section: Discussionmentioning

confidence: 99%

In-gas-cell laser spectroscopy of the magnetic dipole moment of the N≈126 isotope Pt199

et al. 2017

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The magnetic dipole moment and mean-square charge radius of 199g Pt (I π = 5/2 − , t 1/2 = 30.8 min) ground state and 199m Pt (E ex = 424 keV, I π = (13/2) + , t 1/2 = 13.6 s) isomeric state are evaluated for the first time from investigations of the hyperfine splitting of the λ 1 = 248.792 nm transition by in-gas-cell laser ionization spectroscopy. Ground and isomeric states of neutron-rich 199 Pt nucleus were produced by a multinucleon transfer reaction at the KEK Isotope Separation System (KISS), designed for the study of nuclear spectroscopy in the vicinity of N = 126. The measured magnetic dipole moments +0.75(8)μ N and −0.57(5)μ N are consistent with the systematics of those of nuclei with I π = 5/2 − and I π = 13/2 + , respectively.

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“…The stability of these superheavy nuclei depends upon the magicity of the proton and neutron number either spherical and/or deformed. The spherical shell closure for the neutron and proton numbers are at 2,8,20,28,50, and 82 while 126 is only for neutron number. Since a long time, the search about the next spherical shell for the proton number is going on.…”

Section: Introductionmentioning

confidence: 99%

αdecay chains study for the recently observed superheavy elementZ=117within the isospin cluster model

Kumar

2012

Phys. Rev. C

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Skyrme mean-field study of rotational bands in transfermium isotopes

Cited by 105 publications

References 35 publications

Search for a 2-quasiparticle high-Kisomer inRf256

Search for a 2-quasiparticle high-Kisomer inRf256

In-gas-cell laser spectroscopy of the magnetic dipole moment of the N≈126 isotope Pt199

αdecay chains study for the recently observed superheavy elementZ=117within the isospin cluster model

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