Search for nuclear excitation by electronic transition in $^{235}$U
Language
en
Article de revue
This item was published in
Physical Review C. 2004, vol. 70, p. 044303
American Physical Society
English Abstract
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 ...Read more >
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.Read less <
English Keywords
nuclei with mass number 220 or higher
nuclear isomerism
nuclear energy level transitions
nuclear energy levels
Origin
Hal imported