Compound nucleus cooling through early gamma-ray emission seen in neutron-gamma coincidences

Arctaedius, T.; Bargholtz, Chr.; Ekström, R.E.; Fransson, K.; Ritzén, B.; Tegnér, P. E.

doi:10.1016/0370-2693(85)90955-4

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Early Experiments and General Fe Atures1

Introduction1

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1986

1994

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Cited by 12 publications

(2 citation statements)

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“…In (65), charged particle spectra were observed in coincidence with y rays emitted in the 1 6 0 + 58Ni reaction. The particle spectra show exponential shapes characteristic of statistical decay, with slopes that indicate that high-energy y decay tends to occur before particle emission (see also 66). In (67) it was shown in the reaction of 145-MeV 28Si + 120Sn that high-energy y decay occurs from regions of high spin, up to or exceeding 30h.…”

Section: Early Experiments and General Fe Aturesmentioning

confidence: 97%

Giant Resonances in Excited Nuclei

Snover¹

1986

Annual Review of Nuclear and Particle Science

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Section: Early Experiments and General Fe Aturesmentioning

confidence: 97%

Giant Resonances in Excited Nuclei

Snover¹

1986

Annual Review of Nuclear and Particle Science

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“…Some experimental evidences already suggest that, in agreement with the statistical model, highenergy 7 rays are preferentially emitted early in the decay cascade and in direct competition with particle decay [9][10][11]. All these evidences can only be indirect since it is experimentally impossible to determine the time sequence of the various decay components.…”

Section: Introductionmentioning

confidence: 71%

Influence of the giant dipole resonance in the statistical decay of the compound nucleus160Er

Tobbeche

Barrette

Haas³

et al. 1986

Z. Physik A - Atomic Nuclei

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Evaporation residue excitation functions and statistical 7-ray spectra have been measured in the heavy ion fusion reaction ~60+144Nd~16~ between EL~b=76 and 105 MeV. In agreement with statistical model calculations, the evolution of the 7-ray spectra as a function of the compound nucleus excitation energy is consistent with the emission of high-energy ~ rays (E~> 10 MeV) in the early stage of the decay process. The description of the evaporation residue distributions by the statistical model is improved if a 7 strength function including a giant dipole resonance built on each excited state and describing the shape of the measured statistical 7-ray spectra is used in the calculations. The present analysis shows, however, that there is a strong correlation between the parameters of the resonance deduced from the fit to the 7-ray spectra and other parameters of the statistical model, in particular the level density parameter.

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