Shears bands in 201Pb and 202Pb

Baldsiefen, G.; Maagh, P.; Hübel, H.; Körten, W.; Chmel, S.; Neffgen, M.; Pohler, W.; Grawe, H.; Maier, K. H.; Spohr, K.; Schubart, R.; Frauendorf, S.; Maier, H. J.

doi:10.1016/0375-9474(95)00305-k

Cited by 41 publications

(14 citation statements)

References 27 publications

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“…The 99-keV γ ray is observed to directly deexcite the isomer, and intensity balance considerations, combined with theoretical values of conversion coefficients [17], exclude all multipolarities other than E2 for this transition (Table II). Similarities are observed between the decay scheme of 200 Tl and that of its isotone, 201 Pb (N = 119), in terms of both the presence of a low-energy E2 transition deexciting the isomer, and of fragmentation of the intensity into multiple pathways below this level [4,16]. Intensity balance arguments also allow for the multipolarity assignments to the following transitions (with energies in keV): 116 (M1), 192 (E1), 220 (M1), and 286 (E1).…”

Section: A New Isomer At E X = 6007 Kevmentioning

confidence: 57%

“…Excited levels in 201 Pb, an isotone of 200 Tl (N = 119), were studied previously using the 200 Hg(α,3n) reaction [4,9] and, later, with the 192 Os( 14 C,5n) reaction [16]. Levels up to I π = 41/2 + were established using the α-induced reaction and three isomers with I π = 25/2 − , 29/2 − and 41/2 + , and T 1/2 = 63(3) ns, 508(3) ns and 43(3) ns, respectively, were identified above the 13/2 + isomer at 629 keV.…”

Section: B 201 Pbmentioning

confidence: 99%

“…Levels up to I π = 41/2 + were established using the α-induced reaction and three isomers with I π = 25/2 − , 29/2 − and 41/2 + , and T 1/2 = 63(3) ns, 508(3) ns and 43(3) ns, respectively, were identified above the 13/2 + isomer at 629 keV. The experiment with the 14 C beam [16] did not focus on isomeric levels.…”

Section: B 201 Pbmentioning

confidence: 99%

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Isomers from intrinsic excitations in Tl200 and Pb201,202

et al. 2019

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A six-quasiparticle isomer with T 1/2 = 57(2) ns has been established in the doubly-odd isotope 200 Tl and its level scheme is significantly extended. Half-lives of previously reported isomers in 200 Tl and 201,202 Pb have been determined and revised values are reported in a few cases, with T 1/2 = 397(17) ns and 7.0(5) ns for the I π = 5 + and 7 − states in 200 Tl, 52(2) ns for the 41/2 + level in 201 Pb, and 93(4) ns for the 16 + state in 202 Pb. Configurations for the isomers have been assigned and these predominantly involve intrinsic excitations of neutrons from the i 13/2 subshell. The inferred transition rates for the decay of these isomers compare well with single-particle estimates attesting to their intrinsic character.

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Section: A New Isomer At E X = 6007 Kevmentioning

confidence: 57%

Section: B 201 Pbmentioning

confidence: 99%

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Isomers from intrinsic excitations in Tl200 and Pb201,202

et al. 2019

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“…These configurations correspond to one and three i 13/2 neutron holes ͑A and ABC in CSM notation͒, which couple to the 11 Ϫ proton configuration to form the ''shears'' bands. Band 2 has been proposed as ABE11 in 195,197,199,201 Pb ͓29,16,23,30͔ where the negative parity neutron ''E'' stems from the f 5/2 Ϫp 3/2 orbitals.…”

Section: B Configuration Assignmentmentioning

confidence: 99%

Shears bands inPb193

et al. 1996

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Four bands of enhanced dipole transitions, with weak crossovers, have been observed in 193 Pb. Three of these bands are connected to the spherical levels. In addition, the spherical level scheme has been extended. The nuclear spectroscopy was done with the early implementation of GAMMASPHERE and HERA arrays of Ge detectors. The nucleus 193 Pb was populated in the 174 Yb( 24 Mg,5n) reaction at beam energies of 129, 131, and 134 MeV. The experimental results are compared to tilted-axis cranking calculations. The systematical behavior of the dipole bands in the heavier odd-A Pb isotopes, 195,197,199,201 Pb, is also discussed.

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“…The most straightforward option is to use the extracted Green's function as a zeroth order Green's function in the MBPT formalism. Unfortunately, this leads to complicated expressions: the effective potential needed to force the non-interacting system to have the same 1RDM as the interacting system needs to be subtracted from all occurrences of the self-energy [40][41][42][43][44]. This means that also the energy expression depends on the effective potential itself, so becomes a severe complication.…”

Section: Introductionmentioning

confidence: 99%

Approximate energy functionals for one-body reduced density matrix functional theory from many-body perturbation theory

Giesbertz¹,

Uimonen

Leeuwen

2018

Eur. Phys. J. B

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We develop a systematic approach to construct energy functionals of the one-particle reduced density matrix (1RDM) for equilibrium systems at finite temperature. The starting point of our formulation is the grand potential Ω[G] regarded as variational functional of the Green's function G based on diagrammatic many-body perturbation theory and for which we consider either the Klein or Luttinger-Ward form. By restricting the input Green's function to be one-to-one related to a set on one-particle reduced density matrices (1RDM) this functional becomes a functional of the 1RDM. To establish the one-to-one mapping we use that, at any finite temperature and for a given 1RDM γ in a finite basis, there exists a non-interacting system with a spatially non-local potential v[γ] which reproduces the given 1RDM. The corresponding set of non-interacting Green's functions defines the variational domain of the functional Ω. In the zero temperature limit we obtain an energy functional E[γ] which by minimisation yields an approximate ground state 1RDM and energy. As an application of the formalism we use the Klein and Luttinger-Ward functionals in the GW-approximation compute the binding curve of a model hydrogen molecule using an extended Hubbard Hamiltonian. We compare further to the case in which we evaluate the functionals on a Hartree-Fock and a Kohn-Sham Green's function. We find that the Luttinger-Ward version of the functionals performs the best and is able to reproduce energies close to the GW energy which corresponds to the stationary point.

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Shears bands in 201Pb and 202Pb

Cited by 41 publications

References 27 publications

Isomers from intrinsic excitations in Tl200 and Pb201,202

Isomers from intrinsic excitations in Tl200 and Pb201,202

Shears bands inPb193

Approximate energy functionals for one-body reduced density matrix functional theory from many-body perturbation theory

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