Evolution of nuclear structure with increasing spin and internal excitation energy in 152Dy

Holzmann, R.; Ahmad, I.; Dichter, B.K.; Emling, H.; Janssens, R. V. F.; Khoo, T. L.; Ma, W.C.; Drigert, M. W.; Garg, U.; Radford, D. C.; Daly, P.J.; Helppi, H.; Quader, M. A.; Trzaska, W. H.

doi:10.1016/0370-2693(87)90025-6

Cited by 26 publications

(24 citation statements)

References 15 publications

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“…At higher values the dependence is rather flat and a saturation due to the mixing with normal states is reached. This is because the shown delay [22]. Figure 7 shows the calculated effective lifetimes in comparison with the experimental data.…”

Section: Lifetimes and Lineshapesmentioning

confidence: 91%

“…It is significantly lower than for the normal deformed well where aN = A/7, A being the mass. The latter is adopted in accordance with recent experimental observations [22].…”

Section: Level Densitiesmentioning

confidence: 93%

“…In a study of 152Dy, Holzman et al [22] measured the collectivity of the rotational continuum bump by comparing the Doppler shift in backed and unbacked target experiments. The average B (E 2) for the normal deformed bump was found to be Ju,,_' lRn+ 32~ WU.…”

Section: The Energy Dependent Barriermentioning

confidence: 99%

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Lifetimes and lineshapes in superdeformed bands

Schiffer¹,

Herskind²,

Gascon³

1989

Z. Physik A - Atomic Nuclei

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The effective lifetimes and the intensity of the discrete transitions of the superdeformed band in 152Dy are described using a statistical model based on a Monte Carlo simulation. The effect of the transition strength in the continuum and the energy dependence of the barrier are investigated. The importance of the mixing of superdeformed and normal states for the resulting feeding times and intensities is emphasized. The calculations are compared to experimental data, and it is shown that the discrete line shapes are sensitive to the transition strength in the continuum.

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Section: Lifetimes and Lineshapesmentioning

confidence: 91%

“…It is significantly lower than for the normal deformed well where aN = A/7, A being the mass. The latter is adopted in accordance with recent experimental observations [22].…”

Section: Level Densitiesmentioning

confidence: 93%

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Lifetimes and lineshapes in superdeformed bands

Schiffer¹,

Herskind²,

Gascon³

1989

Z. Physik A - Atomic Nuclei

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“…It has been determined that the yrast states consist of oblate aligned-particle configurations. However, the excited states above the yrast line show evidence of collectivity, clearly rejected by a prominent quasicontinuum E2 "bump" [6].…”

Section: Introductionmentioning

confidence: 99%

“…So far, most studies examine y-ray spectra, multiplicities and the appropriate Doppler shifts in order to determine decay schemes and to understand how nuclear structure changes in the spin-excitation energy plane. In particular, ' Dy is a nucleus for which the evolution of the nuclear structure with increasing spin and internal energy has been exhaustively studied by a plethora of experiments which measured spectra, lifetimes, and angular distributions of continuum and discrete transitions [6]. It has been determined that the yrast states consist of oblate aligned-particle configurations.…”

Section: Introductionmentioning

confidence: 99%

Decay history and magnetic moments at high spin inDy152

et al. 1991

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Average magnetic moments as well as information on the time evolution of the continuum structure of " Dy at high spin have been obtained using the transient hyperfine magnetic field acting on fast ions traversing a thin, magnetized gadolinium foil. ' Dy nuclei were populated by the Ge(' Se, 4n)" Dy fusion-evaporation reaction at E(' Se) =326.5 MeV. The target-ferromagnet arrangement corresponds to a time window of about 70 & t & 1100 fs, during which the excited nuclei experience the transient field interaction. The statistical y rays, as well as the high-energy, E~) 1200 keV, y rays contributing to the collective E2 "bump, " exhibit a negligible precession, in accordance with the very short lifetimes of these states. The precession of the angular distribution of discrete yrast y rays deexciting the nucleus from spin I-35k down yields an average magnetic moment for states with 43%~I~31k. The resulting (g ) =0.21i2i is considerably lower than the collective value Z/3 -0.43 and indicates an appreciable contribution from aligned neutrons to the lower-spin region populated within the above time frame. The results are discussed in the framework of model calculations of the y-ray cascade.

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Superdeformation

Sharpey-Schafer¹

1989

New Aspects of Nuclear Dynamics

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Evolution of nuclear structure with increasing spin and internal excitation energy in 152Dy

Cited by 26 publications

References 15 publications

Lifetimes and lineshapes in superdeformed bands

Lifetimes and lineshapes in superdeformed bands

Decay history and magnetic moments at high spin inDy152

Superdeformation

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