CLAVERIE, G.; ALÉONARD, M.M.; CHEMIN, J.F.; GOBET, F.; HANNACHI, F.; HARSTON, M.R.; MALKA, G.; SCHEURER, J.N.; MOREL, Pierre; MEOT, V.

doi:10.1103/PhysRevC.70.044303

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CLAVERIE, G.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

ALÉONARD, M.M.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

CHEMIN, J.F.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

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Physical Review C. 2004, vol. 70, p. 044303

American Physical Society

Résumé en anglais

We have searched for the nuclear excitation by electronic transition (NEET) of the isomeric level at 76 eV in $^{235}$U in a plasma induced by a YAG laser with an energy of 1 Joule and a full width at half maximum time distribution of 5 ns, operating at an intensity of 10$^{13}$ W cm$^{–2}$. We present a thorough description of the experimental conditions and analysis of our data. In this experimental situation we do not detect any excitation of the isomeric level, a result that is at variance with a previously reported one. An upper limit of 6×10$^{–6}$ per atom and per second averaged over the laser-pulse width has been set on the nuclear excitation rate. This value is compared with results obtained in previous experimental and theoretical works.< Réduire

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nuclei with mass number 220 or higher

nuclear isomerism

nuclear energy level transitions

nuclear energy levels

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Search for nuclear excitation by electronic transition in $^{235}$U

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