Production of149gTb in deep inelastic transfer reactions: An approach to the angular momentum of fragments View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1979-03

AUTHORS

M. F. Rivet, R. Bimbot, D. Gardès, A. Fleury, F. Hubert, Y. Llabador

ABSTRACT

The excitation functions for deep inelastic reactions in which two to six charges are transferred from40Ar and63Cu ions to rare earth targets have been measured using activation techniques, the observed radionuclides being150, 151Dy and149gTb. From the comparison of the curves relative to149gTb and those relative to150, 151Dy, it was deduced that the low spin isomer149gTb was produced with significant probability for low incident energies. Using data from (heavy ions,xn) reactions, it was possible to attribute this production to the deexcitation of Tb fragments formed in deep inelastic transfers with angular momenta lower than 9ħ. This result is in good agreement with the angular momentum calculations performed under the hypothesis that the initial angular momentum window leading to deep inelastic reactions is situated between the critical angular momentum for fusion and that corresponding to grazing collisions. As far as Cu induced reactions are concerned, both hypothesis of rolling and sticking are consistent with the experimental data. For Ar induced reactions, the results indicate that the stage of sticking is not reached when the incident energy is lower than 200 MeV.Nuclear Reactions:142, 145Nd,144, 148Sm,154Gd(Ar,X)151, 150Dy,149gTbE=160–280 MeV; measuredσ(E).144Nd,148Sm,151Eu,154Gd(Cu, X)151, 150Dy,149gTb.E=280–420 MeV measuredσ(E). Enriched targets. Deduced angular momentum of Tb fragments. More... »

PAGES

57-66

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf01408480

DOI

http://dx.doi.org/10.1007/bf01408480

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1014345455


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