Primary scientific results of DIMS&PhE in 1995
(See also Publications)
1. Wide range of solutions for dye-lasers was investigated. As a result
optimum pumping conditions have been found both for effective two-step
resonance excitation of Li atoms in effusion beam with natural isotope
content and for selective photoionization of one isotope.
This effect (two-step selective pumping and ionization allows to adjust
beam content from natural to full isotope separation. For this purpose
the system has been developed, which ensure high monochromatization of
dye-laser emission and precise tuning of generated wave length (in experiments
with Li spectral range of 2*10-2 nm was scanned by bandwidth
of 2*10-4 nm).
For precise laser wave length determination a special measuring system
has been worked out and created. It ensures wave length measurements with
relative error less than 4*10-7 in whole tunable range.(Ilyin A.M.,
Moschevykin A.P., Smirnov S.V., Khakhaev A.D.).
This work was carried out on the basis of multipurpose laser
set laser set, which has been developed at the Department of Information
Measuring Systems and Physical Electronics according to programs "High
Technologies" and "Lasers in Industry".
2. Laser radiation interaction with surface of transition metal oxides
have been investigated by using DIMS & PhE multipurpose laser set.
New data about influence of laser pulse energy, power and wave length on
amorphous film crystallization , etching rate of irradiated materials in
different solutions and diffraction efficiency of reflecting gratings,
obtained in these processes, have been received. The work has been fulfilled
in collaboration with Solid State Department. (Ilyin A.M., Kobylin V.I.,
Pergament A.L., Stephanovich G.B., Khakhaev A.D.).
3. Within the framework of "Infomatization of Russia" program
multi-user and multitask environment has been created on the basis of DIMS
& PhE LAN. Some versions of hardware and software platforms including,
UNIX (OSF/1, Ultrix), MSDOS/Windows , Windows NT have been tested and optimum
public resource configuration has been found to prevent user conflicts.
This configuration was developed in accordance with the open system technology
. Workstations connected with experimental set-up have been included in
LAN and proper system software has been selected. (Luizova L.A., Khahaev A.I.,
4. Thermodynamic and kinetic behavior of fullerenes were studied. It
was shown, that the fullerenes in solutions have a trend to the cluster
formation. The cluster size distribution function of fullerene clusters
in solutions is calculated. It was proved, that the cluster formation trend
in fullerene solutions results in concentration dependence of diffusion
and thermodiffusion coefficient of fullerenes in solutions. These dependencies
can be used as the basis for development of a new diffusional method of
separation, enrichment and purification of fullerenes in solutions. The
opportunity for development of a new chemical method for fullerene separation
was also analyzed. This opportunity is based on the difference in reactivity
of fullerene molecules of different kinds relating the reaction of joining
the alkali metal atoms to the fullerene molecule in fullerene solution.
(Eletskii A.V., Smirnov B.M., Khakhaev A.D.; this work was carried out
in collaboration with Russian Research Center "Kurchatov Institute"
and Institute of High Temperature RSA.)