poison substances and drugs can be discovered instantly
with the help of a new-generation device developed
by Russian researchers. The main unit of the device
is the X-radiation detector based on unique nanotechnologies.
it is impossible to do without radiation detectors.
They are used for medical diagnostics of people's
internal and ecological monitoring of environment,
for X-raying of non-transparent objects, in dosimetry
and elementary-particle physics.
Researchers from the Institute of Solid-State
Physics, Russian Academy of Sciences, have
developed such a 3D X-ray detector able to
instantly discover drugs and poisons, explosives
and other hazardous substances which are
hidden in automobiles and containers, in
the luggage and other unexpected objects.
Each chemical substance possesses spectral
and angular distributions of X-raying radiation
inherent only in it. This property is employed
in antiterrorist devices.
How is the device arranged? Its operating section
is the detector itself formed by crossing
rows of scintillation fibers, the density
of which is gradually increasing from the
first row of fibers to the last one. Such
arrangement of the detector allows at different
values of X-radiation energy to simultaneously
get images of objects hidden inside travel
facilities. The PC compares differences in
contrasts of investigated objects at different
energies to reference substances' contrasts
and determines chemical composition of each of discovered objects. The substances
that arouse suspicion are investigated additionally by the same detector judging
by angular distribution of diffracted X-radiation.
Creation of such detectors became possible due
to methods of nanocrystal materials synthesis,
plastic forming and profiled crystal growth
developed at the Institute of Solid-State
Physics, Russian Academy of Sciences. The
researchers managed not only to improve engineering
factors of detectors - to make them energy-effective
and quick - but also to reduce their cost price significantly.
"The detectors developed at the Institute of Solid-State Physics, Russian
Academy of Sciences, have successfully passed testing at the "Metorskan"motor
transport raying installation and in the computed X-ray tomograph. New technologies
of their manufacturing have been confirmed by the RF patents.
At the Vth Moscow International Innovations and
Investment Salon in 2005, the development
on new materials and technologies for radiation
detectors was awarded with the Golden Medal
of the Salon", said the authors.Olga Baklizkaja
information: N.V. Klassen, Ph. D., Institute of
Solid-State Physics, Russian Academy of Sciences,
Moscow Region, Chernogolovka, Tel.: + 7 (495)
993 2755, email@example.com