Title :
Low energy nuclear processes in hot dense femtosecond plasma
Author :
Andreev, A.V. ; Gordienko, V.M. ; Mikheev, P.M. ; Savel´ev, A.B. ; Volkov, R.V. ; Dykhne, A.M. ; Tkalya ; Kalaschnikov, M.P. ; Nickles, P.V. ; Sandner, W.
Author_Institution :
Lomonosov (M.V.) State Univ., Moscow, Russia
Abstract :
Summary form only given. The temperature of hot electrons achieved in the dense plasma at moderate intensities of 10/sup 16/-10/sup 17/ W/cm/sup 2/ has been proved to be enough to provide excitation of low energy nuclear stable isomers. Besides promising applications of this process such as quantitative spectroscopy of low energy levels in metastable nuclear isomers, nuclear isotope separation, the ultimate goal of G-lasing using metastable isomers seems feasible. Between different main mechanisms responsible for such excitation - photoexcitation by plasma X-rays, excitation through inelastic electron scattering and inverse internal electronic conversion, the first one has the highest cross section in hot dense femtosecond laser plasma. We discuss the impact of nuclear line broadening in plasma (due to ion-ion collisions, Doppler effect, Zeeman broadening by plasma self-generated magnetic field, Stark broadening, etc.) on the total number of excited nuclear isomers.
Keywords :
Doppler effect; Stark effect; Zeeman effect; gamma-ray lasers; isotope separation; nuclear isomerism; photoexcitation; plasma collision processes; plasma diagnostics; plasma production by laser; plasma temperature; spectral line broadening; Doppler effect; G-lasing; Stark broadening; Zeeman broadening; dense plasma; excitation; excited nuclear isomers; hot dense femtosecond laser plasma; hot dense femtosecond plasma; hot electrons; inelastic electron scattering; inverse internal electronic conversion; ion-ion collisions; low energy levels; low energy nuclear processes; low energy nuclear stable isomers; metastable isomers; metastable nuclear isomers; moderate intensities; nuclear isotope separation; nuclear line broadening; photoexcitation; plasma X-rays; plasma self-generated magnetic field; quantitative spectroscopy; temperature; Electrons; Laser excitation; Metastasis; Plasma applications; Plasma density; Plasma stability; Plasma temperature; Plasma x-ray sources; Spectroscopy; Ultrafast electronics;
Conference_Titel :
Lasers and Electro-Optics, 2000. (CLEO 2000). Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-634-6
DOI :
10.1109/CLEO.2000.907000
