Magnetic dipole bands in<sup>198</sup>Bi

Zwartz, G.; Drake, T.E.; Cromaz, M.; Ward, D. R.; Janzen, V. P.; Galindo-Uribarria, A; Prévost, D.; Waddington, J. C.; Mullins, S. M.

doi:10.1088/0954-3899/26/6/308

Cited by 10 publications

(9 citation statements)

References 24 publications

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“…Two cross-over E2 transitions have been observed in band B2: a 615-keV (from the 3747 keV level) γ ray between the 318-and 297-keV M1 transitions, and a 591-keV (from the 3429 keV level) γ ray between the 297-and 294-keV M1 transitions. The B(M 1)/B(E2) ratios for these two levels have been found to be 6.6 (14) and 9.2 (21) µ 2 /(eb) 2 , respectively, which agree well with the values reported by Zwartz et al [9].…”

Section: Experimental Methods and The Level Schemesupporting

confidence: 91%

“…These few transitions supported the assignment of ref. [9]. So, the multipolarity of the transitions in these bands were adopted from Zwartz et al and are presented in Table-I.…”

Section: Experimental Methods and The Level Schemementioning

confidence: 99%

“…Fig. 5 shows three different sum coincidence spectra which were generated by summing the spectra with suitable gates on several in-band transitions of previously known [9] three MR bands, B1 ( Fig. 5(a)), B2 ( Fig.…”

Section: Experimental Methods and The Level Schemementioning

confidence: 99%

“…The higher-lying states in 198 Bi have been interpreted by considering the coupling of the h 9/2 proton with the high spin states in 197 Pb above its 13/2 + isomeric state. Later on, Zwartz et al [9] proposed three unconnected MR-type bands in 198 Bi, namely Band 1, Band 2 and Band 3, from the measurement of B(M 1)/B(E2) ratios. In their experiment, the γray transitions were assigned in 198 Bi by examining the associated BGO calorimeter energy spectrum.…”

Section: Introductionmentioning

confidence: 99%

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Crossing of large multiquasiparticle magnetic-rotation bands inBi198

Pai¹,

Mukherjee²,

Bhattacharyya³

et al. 2014

Phys. Rev. C

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High-spin states in the doubly-odd 198 Bi nucleus have been studied by using the 185,187 Re( 16 O, xn) reactions at the beam energy of 112.5 MeV. γ − γ coincidences, directional correlation ratio and integrated polarization asymmetry ratio were measured by using the INGA array with 15 Comptonsuppressed clover HPGe detectors. Definite spins and parities were assigned to the observed levels. The high-spin structure is grouped into three bands (B1, B2 and B3), of which two (B1 and B2) exhibit the properties of magnetic rotation (MR). Tilted axis cranking calculations were carried out to explain the MR bands having large multi-quasiparticle (qp) configurations. The calculated results explain the bands B1 and B2 very nicely, confirming the shears mechanism and suggest a crossing of two MR bands in both the cases. The crossing is from 6-qp to 8-qp in band B1 and from 4-qp to 6-qp in band B2, a very rare finding. A semiclassical model has also been used to obtain the particle-hole interaction strengths below the band-crossing for the bands B1 and B2.

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Section: Experimental Methods and The Level Schemesupporting

confidence: 91%

“…These few transitions supported the assignment of ref. [9]. So, the multipolarity of the transitions in these bands were adopted from Zwartz et al and are presented in Table-I.…”

Section: Experimental Methods and The Level Schemementioning

confidence: 99%

Section: Experimental Methods and The Level Schemementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Crossing of large multiquasiparticle magnetic-rotation bands inBi198

Pai¹,

Mukherjee²,

Bhattacharyya³

et al. 2014

Phys. Rev. C

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“…It was first observed in ref. [109] that the full isoscalar E2 strength in 40 Ca is located in the 0-22 Mev region and is divided into approximately equal parts around 13.5 Mev and 18 Mev. This splitting was confirmed later [110,111].…”

Section: E0 and E2 Resonancesmentioning

confidence: 99%

Extended theory of finite Fermi systems: collective vibrations in closed shell nuclei

Kamerdzhiev¹,

Speth²,

Tertychny³

2004

Physics Reports

176

213

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We review an extension of Migdal's Theory of Finite Fermi Systems which has been developed and applied to collective vibrations in closed shell nuclei in the past ten years. This microscopic approach is based on a consistent use of the Green function method. Here one considers in a consistent way more complex 1p1h⊗phonon configurations beyond the RPA correlations. Moreover, these configurations are not only included in the excited states but also explicitly in the ground states of nuclei. The method has been applied to the calculation of the strength distribution and transition densities of giant electric and magnetic resonances in stable and unstable magic nuclei. Using these microscopic transition densities, cross sections for inelastic electron and alpha scattering have been calculated and compared with the available experimental data. The method also allows one to extract in a consistent way the magnitude of the strength of the various multipoles in the energy regions in which several multipoles overlap. We compare the microscopic transition densities, the strength distributions and the various multipole strengths with their values extracted phenomenologically.

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