Magnetic rotation in 197Pb and 198Pb

Görgen, A.; Nenoff, N.; Hübel, H.; Baldsiefen, G.; Becker, J. A.; Byrne, Aidan; Chmel, S.; Clark, R. M.; Deleplanque, M. A.; Diamond, R. M.; Fallon, P.; Hauschild, K.; Hibbert, I. M.; Körten, W.; Krücken, R.; Lee, I.Y.; Macchiavelli, A. O.; Paul, E. S.; Severen, U. J. van; Stephens, F. S.; Vetter, K.; Wadsworth, R.; Wilson, A. N.; Wilson, J. N.

doi:10.1016/s0375-9474(00)00470-x

Cited by 42 publications

(30 citation statements)

References 29 publications

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“…3 we show the calculated total Routhians for the bands 1 and 3 in 198 Pb and for the bands 1 and 2 in 199 Pb as functions of the rotational frequency in comparison with the data of Refs. [61,62]. It can be seen that the present TAC-RMF calculations reproduce well the experimental total Routhians for all the four bands before band crossing.…”

Section: Resultssupporting

confidence: 74%

“…4, the calculated total angular momenta of the bands 1 and 3 in 198 Pb and the bands 1 and 2 in 199 Pb as functions of the rotational frequency are shown in comparison with the experimental data [61,62] and the PQTAC results [18]. It is found that both the TAC-RMF and the PQTAC results agree well with the experimental data.…”

Section: Resultsmentioning

confidence: 52%

“…2 we show the calculated energy spectra for the bands 1 and 3 in 198 Pb and for the bands 1 and 2 in 199 Pb in comparison with the experimental data of Refs. [61,62]. For certain regions of angular momenta, the calculated values are missing, as, for instance, I = 19 − 21h in band 1 of 198 Pb.…”

Section: Resultsmentioning

confidence: 99%

“…The magnetic rotational bands in 198,199 Pb are investigated. The energy spectra, the relation between spin and rotational frequency, deformation parameters and reduced M1 and E2 transition probabilities are calculated and compared with the available data [11,12,61,62] and those obtained from the PQTAC model [18].…”

Section: Introductionmentioning

confidence: 99%

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Magnetic rotations in198Pb and199Pb within covariant density functional theory

Zhao

Zhang

et al. 2012

Phys. Rev. C

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Well-known examples of shears bands in the nuclei 198 Pb and 199 Pb are investigated within tilted axis cranking relativistic mean-field theory. Energy spectra, the relation between spin and rotational frequency, deformation parameters and reduced M1 and E2 transition probabilities are calculated. The results are in good agreement with available data and with calculations based on the phenomenological pairing plus-quadrupole-quadrupole tilted-axis cranking model. It is shown that covariant density functional theory provides a successful microscopic and fully self-consistent description of magnetic rotation in the Pb region showing the characteristic properties as the shears mechanism and relatively large B(M1) transitions decreasing with increasing spin.

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Section: Resultssupporting

confidence: 74%

Section: Resultsmentioning

confidence: 52%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magnetic rotations in198Pb and199Pb within covariant density functional theory

Zhao

Zhang

et al. 2012

Phys. Rev. C

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“…The shears angle θ is obtained by a geometrical analysis from the experimental angular momenta I of the shears-band states, taking a small collective contribution into account [27]. Within the bands, the shears angle is decreasing from ≈ 90 • to 0 • and, as a consequence, [20,28]. Full curve is the result of our PQTAC calculations.…”

Section: Comparison With Experimental Data and Discussionmentioning

confidence: 99%

Deformation parameters and transition probabilities for shears bands in Pb isotopes

2007

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Tilt angles, deformation parameters, angular momenta, and reduced magnetic dipole and electric quadrupole transition probabilities are calculated within the framework of the tilted-axis cranking model for shears bands in the neutron-deficient Pb isotopes 193 Pb to 202 Pb. The self-consistently calculated quadrupole-deformation parameters for the various configurations lie around ε 2 = −0.1, and the triaxiality is small. The tilt angle, i.e., the angle between the angular momentum and the nuclear symmetry axis, remains almost constant within each band, showing only a small increase toward higher angular momenta. The angular momentum increases mainly due to the shears effect, which is a step-by-step alignment of high-j proton and neutron orbitals into the direction of the total angular momentum. Calculated and experimental M1 transition rates are in good agreement. They decrease with increasing spin within the bands as expected for the shears effect. The calculated B(E2) values show only a weak spin dependence. However, the experimental B(E2) values have large errors, and more accurate data are needed to decide between the present model and a recently suggested geometrical approach.

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