Search for De-excitation of the 186mRe and 110mAg Nuclear Isomers in Plasma of High-Power Picosecond Laser Pulse

Physics of Atomic Nuclei - The possibility of observing the stimulated de-excitation of nuclear isomers (SDENI) in plasma (plasma lifetime ∼1.5 ps, temperature of electrons ∼ 10 keV)...     

Precise measurement of the hyperfine splitting and isotope shift of8S7/2→10P9/2 transition in241Am and243Am atoms

The study of physico-chemical and biotic processes in the environment is essential to understanding the behavior of transuranic nuclides and to assess their environmental impact. Dialysis, ion exchange, and co-precipitation techniques have been used to study speciation. The dissolved fraction of^239,240Pu in coastal waters of Bombay harbor bay and in interstitial water from bottom sediments of the bay were found to be associated with organic matter. The desorption of Pu from sediments in coastal waters is influenced by salinity and carbonate. Studies indicate that, even from anoxic sediments, remobilization and the potential for migration is not significant.     

Searching for stimulated de-excitation of the <Superscript>186<Emphasis Type="Italic">m</Emphasis></Superscript>Re nuclei isomeric state in ISKRA-5 laser plasma

Several targets containing ^186mRe isomeric nuclei are irradiated by laser pulses with an energy of 300 J and a duration of 0.3 ns at the ISKRA-5 facility. The results from measuring the γ-spectra of irradiated samples indicate the stimulated de-excitation of a fraction (~10^–7) of the ^186mRe nuclei in the laser plasma.