High spin structures in194Hg

Fotiades, N.; Harissopulos, S.; Kalfas, C. A.; Kossionides, S.; Papadopoulos, C.; Vlastou, R.; Serris, M.; Sharpey‐Schafer, J. F.; Joyce, Malcolm J.; Beausang, C. W.; Dagnall, P.J.; Forsyth, P.D.; Gale, S.J.; Jones, P. M.; Paul, E. S.; Twin, P.J.; Simpson, John; Cullen, D. M.; Fallon, P.; Riley, M. A.; Clark, R. M.; Hauschild, K.; Wadsworth, R.

doi:10.1007/bf02769510

Cited by 6 publications

(7 citation statements)

References 22 publications

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“…[46] and other isotopes in the transitional region Os-Pb (references in Ref. [47]), as well as dipole bands in Pb and Hg isotopes [48][49][50][51]. The possible existence of a rotational band built on the 12 − isomer and feeding it through a gamma cascade would increase the calculated cross section, and lead to a better reproduction of σ m2 at incident neutron energies below 16 MeV.…”

Section: -6mentioning

confidence: 99%

Isomeric cross section of theAu197(n,2n) reaction

et al. 2011

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In the present work, the 197 Au(n,2n) reaction cross section is experimentally determined relative to the 27 Al(n,α) 24 Na reaction at incident neutron energies of 9.0-10.5 MeV by means of the activation technique. The quasimonoenergetic fast neutron beam was produced via the 2 H(d, n) 3 He reaction at the 5.5-MV Tandem Van de Graaff accelerator at the National Centre of Scientific Research (NCSR) "Demokritos" and was studied to determine the contribution of background "parasitic" neutrons using the multiple foil activation technique and the SULSA unfolding code. The cross sections for the population of the second isomeric state (12 − ) of 196 Au and the sum of the ground (2 − ) and first isomeric state (5 − ) population cross sections were independently determined. Auxiliary Monte Carlo simulations were performed with the MCNP code. Theoretical calculations of the above cross sections in the 8-25 MeV region were carried out with the use of the STAPRE-F, EMPIRE, and TALYS codes, which were also compared in their implementation of the generalized superfluid model. The theoretical results are compared with previous work in the same mass region, and the strong dependence on the level scheme of the nuclei involved was revealed.

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Section: -6mentioning

confidence: 99%

Isomeric cross section of theAu197(n,2n) reaction

et al. 2011

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“…We can compare qualitative features of the dipole bands in 196 Hg with those observed in 192 Hg [4] and 194 Hg [5]. Two dipole bands are observed in 194 Hg.…”

Section: Discussionmentioning

confidence: 87%

“…The Cranked Shell Model had been successfully used to describe routhians, band crossing frequencies and alignments in these oblate nuclei [1,2]. In this mass region dipole bands have been observed in many Pb and Hg isotopes [3][4][5][6] and it has been suggested that these structures involve deformation aligned h 9/2 and i 13/2 protons in the Pb isotopes, while in Hg rotation aligned h 11/2 protons also play a role. Such differences in the configurations are revealed by lower values of the B(M1)/B(E2) ratios in the Hg isotopes.…”

Section: Introductionmentioning

confidence: 99%

Dipole Bands in [sup 196]Hg

Lawrie¹,

Lawrie²,

Msezane³

et al. 2011

AIP Conference Proceedings

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High spin states in 196 Hg have been populated in the 198 Pt(D,6n) reaction at 65 MeV and the level scheme has been extended. A new dipole band has been observed and a previously observed dipole has been confirmed. Excitation energies, spins and parities of these bands were determined from DCO ratio and linear polarization measurements. Possible quasiparticle excitations responsible for these structures are discussed.

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“…The the negative-parity Structures 1 and 2 decay through a complex set of levels that are assumed to be of a single-particle nature, in contrast to the direct decay to rotational bands observed in 191 Hg. Structure 2 in 194 Hg [14] could be considered as similar to Band 8 in 196 Hg, if it can be assumed that this structure has positive parity. The bands that look most similar to the dipole bands in 196 Hg are in 195 Hg [15], where two bands, with positive and negative parity respectively, are observed.…”

Section: Dipole Bandsmentioning

confidence: 99%

“…[11]). The dipole bands in 191 Hg [6], 192 Hg [12], 193 Hg [13], 194 Hg [14], 195 Hg [15], and 196 Hg [7], however, seem to be different. In the Pb isotopes these structures involve deformation-aligned h 9/2 and i 13/2 protons, while in Hg rotation-aligned h 11/2 protons play a major role.…”

Section: Introductionmentioning

confidence: 99%

Rotational structures in Hg196

Lawrie

Msezane

et al. 2019

Phys. Rev. C

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High spin states in 196 Hg were populated in the 198 Pt(α, 6n) reaction at 65 MeV and γ -γ coincidence measurements were performed using the AFRODITE array at iThemba LABS. The level scheme was extended and new rotational bands were observed. A new dipole band was found. The previously reported dipole band was linked to other known states. Excitation energies, spins, and parities of all bands were determined. The bands were assigned nucleon configurations based on cranked shell model calculations.

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High spin structures in194Hg

Cited by 6 publications

References 22 publications

Isomeric cross section of theAu197(n,2n) reaction

Isomeric cross section of theAu197(n,2n) reaction

Dipole Bands in [sup 196]Hg

Rotational structures in Hg196

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