共查询到20条相似文献,搜索用时 593 毫秒
1.
G. A. Zalessakaya D. L. Yakovlev D. I. Baranovskii E. G. Sambor 《Journal of Applied Spectroscopy》1998,65(3):351-356
Collisional losses of vibrational energy in mixtures of benzophenone excited by nitrogen laser radiation (λ=337 nm) and foreign
gases (Ar, Kr, SF6, C5H12) were studied by time-resolved delayed luminescence. It is established that the intensities and rates of decay of the fast
and slow components of delayed luminescence can be used to evaluate the characteristics of V–V– and V–T–transfer of vibrational
energy. For the V-V-process, the efficiencies and mean energies transferred in a collision are determined. It is shown that
in the mixture with multiatomic gases, vibrational equilibrium is reached after a few collisions, the number of which decreases
as the molecule of the foreign gas becomes more complicated. The V–V–process is characterized by high efficiencies of collisions
typical for “supercollisions”. The experimental characteristics of V-V-transfer correlate well with ergodic transfer of vibrational
energy predicted by statistical theories. 0120 0126 V 3
Institute of Molecular and Atomic Physics of the National Academy of Science of Belarus, 70, F. Skorina Ave., Minsk, 220072,
Belarus. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 65, No. 3, pp. 340–345, May–June, 1998. 相似文献
2.
V. A. Ageev A. F. Bokhonov V. V. Zhukovskii A. A. Yankovskii 《Journal of Applied Spectroscopy》1997,64(5):683-688
We present the results of investigations undertaken to establish relationships between certain characteristics of the disintegration
of metals in air and liquid under laser radiation and their thermophysical properties, as well as between the basic parameters
of a gas cavity formed in a liquid and the energy of the laser ablation products of metals. Consideration is given to the
possibilities of applying the dynamic properties of this cavity to control the time behavior of the radiation of solid-state
lasers and to solve spectroanalytical problems.
Institute of Molecular and Atomic Physics, Academy of Sciences of Belarus, 70, F. Skorina Ave, Minsk, 220072, Belarus. Translated
from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 5, pp. 668–673, September–October, 1997. 相似文献
3.
A. P. Blokhin M. F. Gelin I. I. Kalosha S. A. Polubisok V. A. Tolkachev 《Journal of Applied Spectroscopy》1999,66(1):55-61
The polarization of the fluorescence of radicals formed in laser-induced photodissociation of some disulfides in the gas phase
is measured. Experimental data obtained in the study are interpreted within the free recoil model. It is shown that polarization
experiments carried out to investigate photodecay in vapors allow researchers to uniquely the intramolecular direction of
the dipole moments of transitions with absorption and emission.
Institute of Molecular and Atomic Physics of the National Academy of Sciences of Belarus, 70, F. Skorina Ave., Minsk, 220072,
Belarus. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 66, No. 1, pp. 54–59, January–February, 1999. 相似文献
4.
With use of electron energy loss spectra for vapors of anthracene, perylene, 1,4[di(2,5-phenyloxazolyl)] benzene, and paratherphenyl
the energy yields of fluorescence are calculated for electron collision. It is shown that they are considerably smaller than
those for optical excitation conditions.
Deceased
Institute of Molecular and Atomic Physics of the National Academy of Sciences of Belarus, 70, F. Skorina Ave., Minsk, 220072,
Belarus. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 65, No. 1, pp. 146–148, January–February, 1998. 相似文献
5.
S. A. Bagnich 《Journal of Applied Spectroscopy》1998,65(5):687-700
Results of investigations of all types of long-lived luminescence of organic molecules in the gas phase and condensed media
are presented. Methods for identification and separation of contributions of phosphorescence and thermally activated fluorescence
in long-lived luminescence of organic-molecule vapors are proposed. Energy transfer and migration processes in the case of
the inductive-resonant mechanism of intermolecular interaction leading to the appearance of sensitized phosphorescence and
annihilation-induced delayed fluorescence are considered. Experimental results on energy migration obtained for solid solutions
of organic compounds are analyzed within the framework of the concepts of percolation theory with account for the microscopic
inhomogeneity of the systems under investigation and the fractal properties of the clusters of activator molecules.
Institute of Molecular and Atomic Physics, National Academy of Sciences of Belarus, F. Skorina Ave., 70, Minsk, 220072, Belarus.
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 65, No. 5, pp. 662–674, September–October, 1998. 相似文献
6.
P. A. Apanasevich D. E. Gakhovich A. S. Grabchikov V. A. Orlovich 《Journal of Applied Spectroscopy》1997,64(4):461-469
Results of an experimental study of optical feedback as a method to suppress quantum-noise-induced macroscopic fluctuations
in the emission of stimulated RS are reported. Statistic changes in the energy of Stokes pulses in the linear mode of scattering
and those in the amplitudes of solition-like pulses in the nonlinear mode are shown. A decrease in the normal standard deviation
of fluctuations is attained for both modes.
B. I. Stepanov Institute of Physics of the Academy of Sciences of Belarus, 70, F. Skorina Ave., Minsk, 220072, Belarus. Translated
from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 4, pp. 450–457, July–August, 1997. 相似文献
7.
We present the most important results of investigations of lasers based on vapors and solutions of complex organic compounds.
We investigated the effect of a foreign gas, the duration and intensity of the exciting pulse, the temperature of the active
medium, and the spectroscopic parameters of the material on the generation characteristics of complex molecules in the gas
phase. The special features of generation of radiation by a laser with distributed feedback in transition from a condensed
to the gas phase in heating the active medium are considered. It is suggested that the polarization characteristics of the
radiation generated by a vapor laser be used to investigate the laws that govern the relaxation of optically induced anisotropy
of excited molecules of the active medium.
Institute of Molecular and Atomic Physics, National Academy of Sciences of Belarus, 70, F. Skorina Ave., Minsk, 220072, Belarus.
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 65, No. 5, pp. 709–720, September–October, 1998. 相似文献
8.
S. L. Bondarev 《Journal of Applied Spectroscopy》1997,64(1):1-15
A review of data on the photophysics of carotenoids is presented. Results of investigations of spectroscopic, temporal, and
energy parameters of excited S1 and S2 singlet states of β-carotene and related compounds are critically examined. These states give rise to extremely high probabilities
(1011–1013 sec−1) of radiationless deactivation of the electronic excitation energy in carotenoids. Results of investigations of photophysical
properties of triplet states of carotenoids are considered mainly from the standpoint of quenching of singlet oxygen and triplet
states of organic molecules by carotenoids.
Institute of Molecular and Atomic Physics, Academy of Sciences of Belarus, 70, F. Skorina Ave., Minsk, 220072, Belarus. Translated
from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 1, pp. 5–19, January–February, 1997. 相似文献
9.
Institute of Physicoorganic Chemistry, Academy of Sciences of Belarus, 13, Surganov Str., Minsk, 220072, Belarus. Translated
from Zhurnal Prikladnoi Spektroskopii, Vol. 63, No. 2, pp. 258–263, March–April, 1996. 相似文献
10.
A. P. Losev I. N. Nichiporovich S. M. Bachilo G. D. Egorova D. I. Volkovich K. N. Solov'yo 《Journal of Applied Spectroscopy》1995,62(2):311-320
Institute of Molecular and Atomic Physics, Academy of Sciences of Belarus, Minsk, 220072, 70, F. Skorina Ave., Belarus. Translated
from Zhurnal Prikladnoi Spektroskopii, Vol. 62, No. 2, pp. 152–163, March–April, 1995. 相似文献
11.
N. A. Borisevich D. A. Kazberuk S. V. Mel'nichuk S. A. Tikhomirov G. B. Tolstorozhev 《Journal of Applied Spectroscopy》1995,62(3):441-446
Institute of Molecular and Atomic Physics, Academy of Sciences of Belarus, 70 F. Skaryna Ave, Minsk 220072, Belarus. Translated
from Zhurnal Prikladnoi Spektroskopii, Vol. 62, No. 3, pp. 49–55, May–June, 1995. 相似文献
12.
Institute of Molecular and Atomic Physics, Academy of Sciences of Belarus, 70, F. Skorina Ave., Minsk, 220072, Belarus. Translated
from Zhurnal Prikladnoi Spektroskopii, Vol. 62, No. 2, pp. 145–150, March–April, 1995. 相似文献
13.
V. V. Sapunov 《Journal of Applied Spectroscopy》1996,63(4):514-521
Institute of Molecular and Atomic Physics, Academy of Sciences of Belarus, 70. F. Skorina Ave., Minsk, 220072, Belarus. Translated
from Zhurnal Prikladnoi Spektroskopii, Vol. 63, No. 4, pp. 613–621, July–August, 1996. 相似文献
14.
The problem of reflection and refraction of a conical beam at the boundary of an object of cylindrical shape is solved analytically.
The amplitude and energy coefficients of reflection for a field of variable polarization are calculated. The light energy
absorption in a cylindrical object and its distribution over the cross section are investigated. The advantage of using conical
beams of light for probing cylindrically shaped objects, including biological ones, is shown.
Presented at the 5th International Scientific-Technical Conference “Quantum Electronics,” November 22–25, 2004, Minsk, Belarus.
__________
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 72, No. 5, pp. 664–669, September–October, 2005. 相似文献
15.
V. I. Apanasevich I. A. Bocharova S. A. Malyshev 《Journal of Applied Spectroscopy》1998,65(2):314-318
The energy spectrum of deep levels in the depleted region of the p-n-transition of AlGaAs light-emitting heterodiodes has
been investigated by the method of tunneling spectroscopy. It is shown that the rate of change of the forward current, characterizing
the intensity of degradation processes in light-emitting diodes, is interrelated with electronic states of structural defects
in the space-charge region (SCR) of the p-n-transition. The maximum value of this parameter is determined by the presence
of donor complexes with ionization energies of 0.99 and 1.1 eV in the SCR of the p-n-transition.
Institute of Electronics, National Academy of Sciences of Belarus, 22, Logoiskii Trakt, 220090, Minsk, Belarus. Translated
from Zhurnal Prikladnoi Spektroskopii, Vol. 65, No. 2, pp. 298–302, March–April, 1998. 相似文献
16.
A. I. Trokhimets 《Journal of Applied Spectroscopy》1995,62(1):88-90
Institute of Physicoorganic Chemistry, Academy of Sciences of Belarus, 220603, Minsk, Ul. Surganova, 13, Belarus. Translated
from Zhurnal Prikladnoi Spektroskopii, Vol. 62, No. 1, pp. 104–107, January–February, 1995. 相似文献
17.
V. S. Pavlovich 《Journal of Applied Spectroscopy》1997,64(6):764-777
Polar luminescence probe+polar medium subsystems are considered. True minimization parameters of the free energy F are obtained.
It is shown that Franck-Condon transitions between F-terms of different electronic states are generally not “vertical”. A
complete thermodynamic classification of photoinduced processes of orientational relaxation in the excited S1 and ground S0 states is presented. Depending on the excitation conditions they can be either exo- or endothermic, spontaneous or induced
(not spontaneous), and accompanied by an increase or decrease in entropy. Indifferent processes also take place. Regularities
of shifts of fluorescence spectral bands and burned holes in time-resolved experiments are discussed.
Institute of Molecular and Atomic Physics, Academy of Sciences of Belarus, 70, F. Skorina Ave., Minsk, 220072, Belarus. Translated
from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 6, pp. 753–765, November–December, 1997. 相似文献
18.
V. A. Zhdanovskii E. F. Zolotovskaya V. N. Snopko O. V. Tsaryuk 《Journal of Applied Spectroscopy》1995,62(6):1127-1130
B. I. Stepanov Institute of Physics, Academy of Sciences of Belarus, 70 F. Skorina Ave., Minsk, 220072, Belarus. Translated
from Zhurnal Prikladnoi Spektroskopii, Vol. 62, No. 6, pp. 170–173, November–December, 1995. 相似文献
19.
A method of NMR imaging and elimination of image distortions in an inhomogeneous and unstable polarizing magnetic field is
developed. An algorithm is given to determine the plane shifts of signals caused by a change in the magnetic field.
Institute of Applied Physics of the National Academy of Sciences of Belarus, 16, F. Skorina Ave., Minsk, 220072, Belarus.
Translated from Zhurnal Priklanoi Spektroskopii, Vol. 66, No. 2, pp. 270–274, March–April, 1999. 相似文献
20.
Institute of Molecular and Atomic Physics Academy of Sciences of Belarus, 70, F. Skorina Ave., Minsk, 220072, Belarus. Translated
from Zhurnal Prikladnoi Spektroskopii, Vol. 62, No. 2, pp. 128–136, March–April, 1995. 相似文献