Intruder bands in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Te</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>114</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>: Smooth band termination

Thorslund, I.; Fossan, D. B.; LaFosse, D. R.; Schnare, H.; Hauschild, K.; Hibbert, I. M.; Mullins, S. M.; Paul, E. S.; Ragnarsson, I.; Sears, J. M.; Vaska, P.; Wadsworth, R.

doi:10.1103/physrevc.52.r2839

Cited by 40 publications

(19 citation statements)

References 12 publications

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“…For 114 Te, quasicontinuum gamma-ray spectra from a fusion reaction suggest the presence of collective rotation in the high spin region I > ∼ 35h [11]. Rotational band structures were observed recently up to spin I ∼ 50h; the moment of inertia associated with the observed rotational bands decreases with spin, indicating that the collective rotation may terminate at the highest spins [12]. In the present calculation for 114 Te, we neglect the possibility of band termination and choose a fixed value for the deformation, for simplicity.…”

Section: Systematics and Varieties Of Rotational Dampingmentioning

confidence: 96%

Microscopic structure of rotational damping

et al. 1999

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The damping of collective rotational motion is studied microscopically, making use of shell model calculations based on the cranked Nilsson deformed mean-field and on residual two-body interactions, and focusing on the shape of the gamma-gamma correlation spectra and on its systematic behavior. It is shown that the spectral shape is directly related to the damping width of collective rotation, Γ rot , and to the spreading width of many-particle many-hole configurations, Γ µ . The rotational damping width is affected by the shell structure, and is very sensitive to the position of the Fermi surface, besides mass number, spin and deformation. This produces a rich variety of features in the rotational damping phenomena. * A talk presented by M.M. at

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Section: Systematics and Varieties Of Rotational Dampingmentioning

confidence: 96%

Microscopic structure of rotational damping

et al. 1999

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“…More recent discrete spectroscopy studies made with multigermanium detector arrays have identified discrete rotational bands at high spins for several nuclei in the A 110 120 mass region. We have chosen to study the nucleus 114 Te, for which three rotational bands have been observed [7], as a representative example in this mass region, using for the first time the same analysis technique developed for the study of rare-earth nuclei. Keeping the above picture in mind we focus mainly on a comparative analysis of the 114 Te nucleus with the rare-earth nucleus 164 Yb, which is stable in deformation and well studied by discrete line spectroscopy [8].…”

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confidence: 99%

UnresolvedγRays in114Te: Mass Dependence of Rotational Damping

et al. 1999

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Unresolved g rays of 114 Te sorted into one-and two-dimensional spectra were studied. The reaction 64 Ni͑E beam 230 270 MeV͒ 1 54 Cr was used and the g rays were detected with the EUROBALL array. The effective moment of inertia for the quasicontinuum was found to be almost constant for I ͑20 40͒h, in contrast with the decreasing behavior of the terminating yrast band. A comparative analysis with the nucleus 164 Yb is presented and the results from a fluctuation analysis were compared with cranked shell model calculations. The comparison shows consistency in the scaling of the rotational damping width with mass number.PACS numbers: 21.10. Re, 21.60.Ka, 23.20.Lv, 27.60. + j The understanding of rotational motion in thermally excited nuclei is one of the central issues in nuclear structure and more in general in the study of effects beyond mean field. Until now, convincing evidence of collective damped rotation has been obtained for the mass region A ഠ 160. The overall features of quasicontinuum spectra have been well described with the rotational damping model calculations in which the mean-field rotational bands of the cranked shell model are mixed by the residual two-body interaction [1]. In the original formulation of rotational damping [2], schematic estimates for the scaling of the mixing process of mean-field bands with mass number were derived. The energy U 0 relative to the yrast line, at which the damping (mixing) sets in, depends on the level density and on the strength of the residual interaction, and is predicted to vary with mass number U 0~A 22͞3 . The rotational damping width G rot , expressing the width of the quadrupole transition strength distribution, is proportional to the statistical dispersion of the rotational frequency of cranked shell model n-particle-n-hole states. For G rot the scaling is expected to follow the relation G rotĨ A 25͞2 e 21 , where I, A, and e are the spin, mass number, and deformation, respectively. Experiments have earlier confirmed the prediction of U 0 ഠ 0.7 MeV for the onset of damping in rare-earth nuclei [3]. However, the damping width G rot appears to be a quantity not easily accessible in experiments [4]. Experimentally, its variation with mass number for normally deformed nuclei has never been investigated. On the other hand, a detailed test of effects beyond mean field such as the rotational damping mechanism is also relevant in view of the analogy discussed in Ref.[5] with nuclear magnetic resonance. To determine the validity of the relation given above, one needs to compare nuclei with a similar deformation, but with different masses; good examples are nuclei with A ഠ 160 and A ഠ 110 for which a factor of 2 difference in the damping width is expected.Some evidence of collective rotation in the quasicontinuum in nuclei with A 110 120, characterized by spherical shapes at low spins, was found two decades ago in experiments made with scintillator detectors [6]. More recent discrete spectroscopy studies made with multigermanium detector arrays have identified di...

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“…The [21,4] − configuration (following the notation introduced by Afanasjev and Ragnarsson [25]) gives rise to a terminating spin of 95/2 − as a result of the aligning of the spins of all the particles and holes outside the core 100 Sn. The band needs to be studied up to spins higher than those observed in the present work (J π = 59/2 − ) or reported in the literature (75/2 − ) and lifetimes of such excited states have to be measured in order to arrive at a firm conclusion regarding band termination.…”

Section: Resultsmentioning

confidence: 99%

“…Experimentally, rotational bands have been observed up to high spins in several Sn, Sb and Te isotopes [2][3][4]. Some of these bands have been interpreted in terms of configuration-dependent cranked Nilsson-Strutinsky calculations that predict a gradual change from collective prolate at low spin to non-collective oblate at high spin, leading to smooth band termination.…”

Section: Introductionmentioning

confidence: 98%

Experimental study of the πh 11/2 band in 113Sb

Ganguly¹,

Banerjee

Dey

et al. 2011

Pramana - J Phys

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In the present work, the excited states of 113 Sb were populated in the 100 Mo( 20 Ne, p6n) reaction at a beam energy of 136 MeV. States only up to 59/2 − were observed in the J = 2 band. Mean lifetimes for the five states (from 4460 to 7998 keV) were measured for the first time using Doppler shift attenuation method. An upper limit of the lifetime (0.14 ps) was estimated for the 9061 keV, 47/2 − state. The B(E2) values, derived from the present lifetime results, correspond to a large quadrupole deformation of β 2 = 0.32. The observed reduction in the experimental B(E2) values for the 918.4 keV (spin 39/2 − → 35/2 − ) and 985 keV (spin 43/2 − → 39/2 − ) transitions may be interpreted as due to the proton alignement in the g 7/2 orbital. The dynamic moment of inertia was observed to be about half of the rigid body value at the highest observed frequency.

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Intruder bands inTe114: Smooth band termination

Cited by 40 publications

References 12 publications

Microscopic structure of rotational damping

Microscopic structure of rotational damping

UnresolvedγRays in114Te: Mass Dependence of Rotational Damping

Experimental study of the πh 11/2 band in 113Sb

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