Levels, lifetimes and g-factors in 198Po and 200Po

Maj, A.; Grawe, H.; Kluge, H.; Kuhnert, A.; Maier, K. H.; Recht, J.; N, Roy; Hübel, H.; Guttormsen, M.

doi:10.1016/0375-9474(90)90430-t

Cited by 36 publications

(30 citation statements)

References 18 publications

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“…Maj et al [91] have analyzed the B(E2; 8 [145,146]. In view of the discrepancies between the IBM-CM calculations and the experimental data concerning the g factor and the B(E2; 8…”

Section: Detailed Comparison Between the Experimental Data And Thementioning

confidence: 99%

“…The experimental information (up to the end of the 1990s), down to A = 192 (N = 108), was obtained mainly using early fusion-evaporation reactions, followed by in-beam γ -ray spectroscopy, with, in particular, information on energy spectra systematics for A = 192, 194 [84][85][86], A = 194 [87], A = 196, 198 [88], A = 196, 198 [89], A = 198 [90], and A = 198, 200 [91]. This particular part of the mass region has also been analyzed using α-and β-decay studies of mass-separated Rn and At nuclei, resulting in information about excited 0 + states in the isotopes with A = 196-202 [92] and in energy spectra of the isotopes A = 200, 202 [93], as well as making use of α-decay studies from the Rn nuclei for A = 198 [94].…”

Section: Experimental Data: Situation In the Po Nucleimentioning

confidence: 99%

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Nuclear shape coexistence in Po isotopes: An interacting boson model study

García-Ramos

Heyde

2015

Phys. Rev. C

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Background:The lead region, Po, Pb, Hg, and Pt, shows up the presence of coexisting structures having different deformation and corresponding to different particle-hole configurations in the shell-model language. Purpose: We intend to study the importance of configuration mixing in the understanding of the nuclear structure of even-even Po isotopes, where the shape coexistence phenomena are not clear enough. Method: We study in detail a long chain of polonium isotopes, [190][191][192][193][194][195][196][197][198][199][200][201][202][203][204][205][206][207][208] Po, using the interacting boson model with configuration mixing (IBM-CM). We fix the parameters of the Hamiltonians through a least-squares fit to the known energies and absolute B(E2) transition rates of states up to 3 MeV. Results: We obtained the IBM-CM Hamiltonians and we calculate excitation energies, B(E2)'s, electric quadrupole moments, nuclear radii and isotopic shifts, quadrupole shape invariants, wave functions, and deformations. Conclusions: We obtain a good agreement with the experimental data for all the studied observables and we conclude that shape coexistence phenomenon is hidden in Po isotopes, very much as in the case of the Pt isotopes.

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“…Maj et al [91] have analyzed the B(E2; 8 [145,146]. In view of the discrepancies between the IBM-CM calculations and the experimental data concerning the g factor and the B(E2; 8…”

Section: Detailed Comparison Between the Experimental Data And Thementioning

confidence: 99%

Section: Experimental Data: Situation In the Po Nucleimentioning

confidence: 99%

Nuclear shape coexistence in Po isotopes: An interacting boson model study

García-Ramos

Heyde

2015

Phys. Rev. C

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“…No coincidences between delayed γ rays were observed. The half-life of the isomeric state was determined to be 15 (2) μs. Unexpectedly, the B(E3) value of 8.4(12) W.u.…”

Section: Introductionmentioning

confidence: 99%

“…The isomers have a dominant configuration of π [1h 9/2 ⊗ 1i 13/2 ][ 1 -3] and typical half-lives between 0.5 ns and 1 μs. Most of the isomers de-excite via E3 transitions to 8 + levels [1][2][3][4][5][6]. E3 transition strengths were found to increase with decreasing neutron number [3,7,8], which was suggested to be due to the structure and deformation of the 8 + states [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Short-lived isomers inPo192andPo194

et al. 2016

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Isomeric states in194 Po and 192 Po were studied at the velocity filter SHIP. Po. Several new γ -ray transitions were attributed to the isomers and γ -γ coincidences for both isomers were studied for the first time. The 459-keV transition earlier, tentatively proposed as de-exciting the isomeric level in 194 Po, was replaced by a new 248-keV transition, and the spin of this isomer was reassigned from (11 − )to(10 − ). The de-excitation of the (11 − ) isomeric level in 192 Po by the 154-keV transition was confirmed and a parallel de-excitation by a 733-keV (E3) transition to (8 + ) level of the ground-state band was suggested. Moreover, side feeding to the (4 + ) level of the ground-state band was proposed. The paper also discusses strengths of transitions de-exciting 11 − isomers in neighboring Po andPbisotopes.

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Introduction

Sukhoruchkin

Soroko

Tables of Excitations From Reactions With Charged Particles. Part 3: Z = 63 - 99

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Levels, lifetimes and g-factors in 198Po and 200Po

Cited by 36 publications

References 18 publications

Nuclear shape coexistence in Po isotopes: An interacting boson model study

Nuclear shape coexistence in Po isotopes: An interacting boson model study

Short-lived isomers inPo192andPo194

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