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

Journal Article · Fri Oct 01 00:00:00 EDT 2004 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.70.044303· OSTI ID:20695643

Claverie, G; Aleonard, M M; Chemin, J F; Gobet, F; Hannachi, F; Harston, M R; Malka, G; Scheurer, J N; Morel, P; Meot, V ^[1]

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1. Centre d'Etudes Nucleaires de Bordeaux-Gradignan, 33175 Gradignan (France)

We have searched for the nuclear excitation by electronic transition (NEET) of the isomeric level at 76 eV in {sup 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{sup 13} W cm{sup -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 6x10{sup -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.

• OSTI ID: 20695643
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 70, Issue 4; Other Information: DOI: 10.1103/PhysRevC.70.044303; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DISTRIBUTION
ENERGY LEVELS
EV RANGE
EXCITATION
ISOMERIC NUCLEI
LASER-PRODUCED PLASMA
PULSES
URANIUM 235