1988
DOI: 10.1103/physrevlett.61.1348
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Abstract: The superdeformed band in 149 Gd has been populated with various input angular momenta and excitation energies. These, together with all other available data, indicate that the necessary criterion for populating superdeformed bands is to form cold residual nuclei at spins higher than those where the superdeformed states become yrast. In addition, the decrease in the superdeformed band intensity as it is gated by higher-energy y rays does not support the predictions based on a recently proposed feeding mechanis… Show more

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Cited by 33 publications
(8 citation statements)
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“…Taras et al [7] have done a similar study on the relative population of the superdeformed (SD) and the normally deformed states in 149Gd: they measured the variation with beam energy of the ratio of the intensity of the discrete transitions between SD states to the intensity of transitions between normal states. They also found that above a certain beam-energy, this ratio decreases.…”
Section: Discussionmentioning
confidence: 97%
“…Taras et al [7] have done a similar study on the relative population of the superdeformed (SD) and the normally deformed states in 149Gd: they measured the variation with beam energy of the ratio of the intensity of the discrete transitions between SD states to the intensity of transitions between normal states. They also found that above a certain beam-energy, this ratio decreases.…”
Section: Discussionmentioning
confidence: 97%
“…This is because the E1 transition probability at E γ ≈ 8-10 MeV for the decay of the giant dipole resonance (GDR) built on SD configurations is expected to be larger than for ND states, both due to the shape of the strength function and to the level density of SD states [88]. Although several attempts have been made in the last decay to find experimental evidence for the E1 feeding of SD states, no conclusive answer could be given to the problem, mainly due to the experimental limitations of the set-ups used [89][90][91]. In the 143 Eu experiment previously discussed, the Figure 41.…”
Section: Sd Ndmentioning
confidence: 99%
“…Another factor responsible for the enhanced population of yrast superdeformed states, also put forward by the NBI group in collaboration with the Milano and Strasbourg groups, is a lower number of final states for cooling transitions in the superdeformed potential energy minimum. Measurements of the E1 continuum in coincidence with superdeformed states were performed with the 8π spectrometer but no enhancement could be observed in Gd 149 [96]. A few years later, an effect was observed in Eu 143 using the EUROBALL array [97,98].…”
Section: Superdeformationmentioning
confidence: 99%