Spin alignment in superdeformed rotational bands

Stephens, F. S.

doi:10.1016/0375-9474(90)91136-f

Cited by 37 publications

(21 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There clearly have to be additional compensation effects, for example, from changes in pairing correlations or the alignment of single-particle states as proposed in Refs. [57,61,[69][70][71] for the observation of identical bands found for pairs of rare-earth-metal nuclei.…”

Section: A Similarity Of Transition Energies: a Possible Case Of Idementioning

confidence: 83%

In-beam γ -ray and electron spectroscopy of Md249,251

Briselet¹,

Theisen²,

Sulignano³

et al. 2020

Phys. Rev. C

View full text Add to dashboard Cite

Section: A Similarity Of Transition Energies: a Possible Case Of Idementioning

confidence: 83%

In-beam γ -ray and electron spectroscopy of Md249,251

Briselet¹,

Theisen²,

Sulignano³

et al. 2020

Phys. Rev. C

View full text Add to dashboard Cite

“…The mass-deformation compensation mechanism resulting from the filling of levels is therefore unable to explain the experimental findings. There clearly have to be additional compensation effects, for example from changes in pairing correlations or the alignment of singleparticle states as proposed in [51,55,[63][64][65] for the observation of identical bands found for pairs of rare-earth nuclei.…”

Section: Evidence For Octupole Correlations In 249251 MDmentioning

confidence: 99%

In-beam gamma-ray and electron spectroscopy of $^{249,251}$Md

Briselet,

Theisen,

Sulignano

et al. 2020

Preprint

View full text Add to dashboard Cite

The odd-Z 251 Md nucleus was studied using combined gamma-ray and conversion-electron inbeam spectroscopy. Besides the previously observed rotational band based on the [521]1/2 − configuration, a new rotational structure has been identified using gamma-gamma coincidences. The use of electron spectroscopy allowed the rotational bands to be observed over a larger rotational frequency range. Using the transition intensities that depend on the gyromagnetic factor, a [514]7/2 − single-particle configuration has been inferred for the new band, i.e. the ground-state band. A physical background that dominates the electron spectrum with an intensity of 60% was well reproduced by simulating a set of unresolved excited bands. Moreover, a detailed analysis of the intensity profile as a function of the angular momentum provided a new method for deriving the orbital gyromagnetic factor, namely gK = 0.69 +0.19 −0.16 for the ground-state band. The odd-Z 249 Md was studied using gamma-ray in-beam spectroscopy. Evidence for octupole correlations resulting from the mixing of the ∆l = ∆j = 3 [521]3/2 − and [633]7/2 + Nilsson orbitals were found in both 249,251 Md. A surprising similarity of the 251 Md ground-state band transition energies with those of the excited band of 255 Lr has been discussed in terms of identical bands. New Skyrme-Hartree-Fock-Bogoliubov calculations were performed to investigate the origin of the similarity between these bands.

show abstract

“…One of the most interesting phenomena observed in SD bands is the identical bands (IB's) [17][18][19] whereby SD bands with very nearly identical energies were observed in different nuclei. The incremental alignment depending only on γtransition energies was introduced [20][21][22] to compare the SD bands in neighboring nuclei. The ΔI = 2 energy staggering in gammaray transitions [23][24][25][26] is one of the few mechanisms which not predicted theoretically and up to now is poorly understood.…”

Section: Introductionmentioning

confidence: 99%

Structure of Superdeformed Rotational Bands in A ~ 150 Mass Region

Kotb

Khalaf

2015

JAP

View full text Add to dashboard Cite

The structure of superdeformed rotational bands (SDRB's) in A ~ 150 mass region are studied by using the Harris three â€“ parameter expansion and the incremental alignment. The bandhead spins Io have been determined with best fit procedure in order to obtain a minimum root mean square deviation between the calculated and the experimental dynamical moments of inertia. The kinematic moment of inertia has been calculated as a function of rotational frequency and compared to the corresponding experimental ones by assuming three spin values Io - 2 , Io , Io + 2. The transition energies and the variation of the moments of inertia as a function of rotational frequency have been calculated. The agreement between theory and experiment are excellent. The identical bands of SDRB's with Î”I = 2 staggering in 148Gd (SD6) and 149Gd (SD1) are investigated. Also the presence of Î”I = 2 staggering effect in the yrast bands of 147Eu and 150Tb has been examined.

show abstract

Spin alignment in superdeformed rotational bands

Cited by 37 publications

References 11 publications

In-beam γ -ray and electron spectroscopy of Md249,251

In-beam γ -ray and electron spectroscopy of Md249,251

In-beam gamma-ray and electron spectroscopy of $^{249,251}$Md

Structure of Superdeformed Rotational Bands in A ~ 150 Mass Region

Contact Info

Product

Resources

About