共查询到20条相似文献,搜索用时 15 毫秒
1.
IR spectra of acetonitrile embedded in an argon matrix and in a liquid are recorded. IR spectra of specimens obtained with
different concentrations of acetonitrile in argon are analyzed. The spectral region of C≡N vibrations of 2200–2300 cm−1 with bands of monomers and possible associates is investigated. Overlap with the band of a hot transition on the low-frequency
side is responsible for the pronounced asymmetry of the band ν(C≡N).
To whom correspondence should be addressed.
St. Petersburg State Institute of Precision Mechanics and Optics (Technical University), 14, Sablinskaya Str., St. Petersburg,
197101, Russia. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 66, No. 5, pp. 627–631, September–October, 1999. 相似文献
2.
Yu. M. Smirnov 《Journal of Applied Spectroscopy》1998,65(1):5-9
The excitation cross-sections of transitions of a ruthenium atom from the3
S
0−,3
P
0−, and3
D
0-levels are measured by the method of extended crossed beams. Based on the results of measurements, the excitation cross-sections
of the states are calculated (ignoring cascade contribution).
Moscow Power Engineering Institute, 14, Krasnokazarmennaya St., Moscow, E-250, 111250, Russia. Translated from Zhurnal Prikladnoi
Spektroskopii, Vol. 65, No. 1, pp. 9–13, January–February, 1998. 相似文献
3.
V. V. Semenov 《Journal of Applied Spectroscopy》1998,65(6):871-878
A computation is carried out for light-induced shifts in the frequency of a multiphoton radiooptical SHF resonance in alkali
atoms on the basis of the quantum formalism of spherical tensors. The components of a light-induced shift in frequency at
magneto-independent 0–0– and 1,–1-transitions in87Rb atoms under the conditions of isotopic filtration of the resonance light of pumping are calculated. The difference between
the temperatures of a filter cell is discovered at which the point of zero shift in the frequency of radiooptical resonance
is attained. The components of the light-induced shift of frequency in optically oriented87Rb and133Cs atoms are compared in the absence of collisional reorientation in excited state. The prevailing role of the tensor component
of light-induced shift in pumping by the D1-line of a head doublet and the effect of the orientational dependence of the frequency of a multiphoton resonance on change
in the sign of the pumping source radiation polarization are noted.
St. Petersburg State Polytechnical University, 29 Politekhnicheskaya Str., St. Petersburg, 195251, Russia. Translated from
Zburnal Prikladnoi Spektroskopii, Vol. 65, No. 6, pp. 832–838, November–December, 1998. 相似文献
4.
Yu. M. Smirnov 《Journal of Applied Spectroscopy》1997,64(6):715-720
Detailed information about excitation cross-selections of spectral lines of titanium, zirconium, and hafnium atoms obtained
using extended crossed beams are used for calculation of the excitation cross-sections of the3G0-levels of these atoms. Results are compared with cross-sections calculated in Born’s approximation. For titanium: it is found
that theoretical predictions agree well with experimental data. Differences found for zirconium are explained by the single-configuration
approximation used in the calculation.
Moscow Power Institute, Russia, 14 Krasnokazarmennaya St., 111250, Moscow E-250, Russia. Translated from Zhurnal Prikladnoi
Spektroskopii, Vol. 64, No. 6, pp. 707–710, November–December, 1997. 相似文献
5.
Y. M. Smirnov 《Journal of Applied Spectroscopy》1998,65(2):161-167
Dissociation-induced excitation of a singly charged cesium ion taking place as a result of collisions of electrons with CsOH
molecules is investigated. Possible reaction channels in the low-energy region are discussed. It is established that sequential
population plays an important role for 6p levels of Cs+.
Moscow Power Engineering Institute, 14, Krasnokazarmennaya St., Moscow, 111250, Russia. Translated from Zhurnal Prikladnoi
Spektroskopii, Vol. 65, No. 2, pp. 159–165, March–April, 1998. 相似文献
6.
M. K. Samokhvalov 《Journal of Applied Spectroscopy》1995,62(3):555-558
Ul'yanovsk State Technical University, 32, Severnyi Venets St., Ul'yanovsk, 432027, Russia. Translated from Zhurnal Prikladnoi
Spektroskopii, Vol. 62, No. 3, pp. 182–185, May–June, 1995. 相似文献
7.
Yu. M. Smirnov 《Journal of Applied Spectroscopy》1997,64(5):573-577
Cross-sections of the4Do-levels of a cobalt atom are determined based on the results of measurements of 880 excitation cross-sections of the CoI spectral
lines. Detailed calculations of branching and cascade population are made for the levels of the terms z4Do, y4Do, and x4Do. Results of the present work and the cross sections calculated by R. K. Peterkop in the Born approximation are shown to be
in good agreement.
Moscow Power Engineering Institute, 14, Krasnokazarmennaya St., Moscow, E-250, 111250, Russia. Translated from Zhurnal Prikladnoi
Spektroskopii, Vol. 64, No. 5, pp. 561–565, September–October, 1997. 相似文献
8.
Optimization of the glass cylindrical active element (AE) of a solid-state laser is carried out. Dependences of the optical
quality of a laser medium on scale-geometry parameters of the AE with different-intensity optical pumping are obtained. The
possibility of considerable increasing of the laser efficiency by using an aperture diaphragm is shown.
Baltic State Technical University, 1, 1st. Krasnoarmeiskaya St., St.-Petersburg, 198005, Russia. Translated from Zhurnal Prikladnoi
Spektroskopii, Vol. 64, No. 6, pp. 734–737, November–December, 1997. 相似文献
9.
We consider the possible evolution of the rotation period and magnetic field of the X-ray source RX J0720.4-3125, assuming
that this source is an isolated neutron star accreting from the interstellar medium. The magnetic field of the source is estimated
to be 106–109 G (the most probable value is about 2·108 G), and it is difficult to explain the observed rotational period 8.38 s without invoking the hypothesis of magnetic field
decay. For calculations we used the model of ohmic dissipation of the field in the core of the neutron star. Estimates for
the accretion rate (10−14–10−16 M⊙/yr), velocity of the source through the interstellar medium (10–50 km/s), and neutron star age (2·109–1010 yrs) are obtained.
Lomonosov State University, Moscow, Russia; loffe Physical and Engineering Institute, St. Petersburg, Russia. Translated from
Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 41, No. 1, pp. 28–35, January, 1998. 相似文献
10.
V. A. Goryunov B. N. Denisov A. P. Korolyov E. V. Nikishin 《Journal of Applied Spectroscopy》1997,64(2):287-291
Within the framework of the probability method, we obtained analytical expressions for the luminescence power, absorption
power, and energy yield of photoluminescence in a system of particles with three energy levels on periodic pulse excitation.
It is shown that at certain periods and durations of exciting pulses the energy yield can be higher than under stationary
excitation conditions.
Mordovia State University, 68, Bol'shevistskaya St., Saransk, 430000, Russia. Translated from Zhurnal Prikladnoi Spektroskopii,
Vol. 64, No. 2, pp. 269–272, March–April, 1997. 相似文献
11.
Yu. M. Smirnov 《Journal of Applied Spectroscopy》1997,64(1):16-21
The method of extended intersecting beams is used for studying inelastic collisions of electrons with cesium fluoride molecules.
Forty-six cross-sections for dissociative excitation of the spectral lines of a cesium atom located in the spectral region
387–825 nm were used. The behavior of the sections in the spectral series of a cesium atom is investigated, which is reflected
by a power law. The values of constants that are parameters in the power-law formula are determined.
Moscow Power Engineering Institute, 14, Krasnokazarmennaya St., E-250, Moscow, 105835, Russia. Translated from Zhurnal Prikladnoi
Spektroskopii, Vol. 64, No. 1, pp. 20–25, January–February, 1997. 相似文献
12.
G. G. Shakhov 《Journal of Applied Spectroscopy》1995,62(3):431-434
S. I. Vavilov State Optical Institute, Russia, 199034, St. Peterburg, Birzhevaya Liniya, 12. Translated from Zhurnal Prikladnoi
Spektroskopii, Vol. 62, No. 3, pp. 38–42, May–June, 1995. 相似文献
13.
Systematic investigations of the influence of the elemental composition and concentration of surfactants on the atomic absorption
of chromium have been carried out. It is shown that sodium dodecyl sulfate maximally increases the analytical signal and selectivity
in chromium determination. The atomic-absorption technique of determining the quantitative content of chromium in sewage of
industrial enterprises with application of sodium dodecyl sulfate as a chemical modifier has been developed. The detection
limit for chromium is 1.2 μg/dm3.
Reported at the 5th All-Russia Conference on Analysis of Environmental Objects “Ekoanalitika-2003” with participation of foreign
scientists, October 6–10, 2003, St. Petersburg, Russia.
__________
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 72, No. 4, pp. 546–550, July–August, 2005. 相似文献
14.
We present the results of a theoretical study of the dependence of radio emission from Mercury at wavelengths 0.3–76.8 cm
on the structure and composition of its outer layer. Employing different models for the structure of this layer, we show that
the radiative component of the heat flux strongly influences the effective temperature and its spectral characteristics. Using
the two-stratum model, we demonstrate that account of morphological inhomogeneity over the depth of the outer layer is crucial
for interpreting the data on radio emission from Mercury measured with high resolution over the planet’s surface. The obtained
results may be useful for comparing experimental data with theory to determine the physical characteristics of the upper cover
of Mercury.
The results of this paper were partially reported at the XXVII Radio Astronomical Conference (St. Petersburg, November 10–14,
1997) [1].
Radiophysical Research Institute, Nizhny Novgorod, Russia. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika,
Vol. 42, No. 3, pp. 203–214, March 1999. 相似文献
15.
Results of an investigation of the depolarization loss of interference-field contrast are presented. The loss of contrast
was found experimentally and simulated numerically for different interferometric schemes: with lateral and radial shifts and
with a reference beam. It is found that the original polarization of the probing radiation affects substantially the integral
contrast of the interference field.
Baltic State Technical University, 1, 1st Krasnoarmeiskaya St., St.-Petersburg, 198005, Russia. Translated from Zhurnal Prikladnoi
Spektroskopii, Vol. 65, No. 1, pp. 62–66, January–February, 1998. 相似文献
16.
The diffuse reflection spectroscopy technique was used to investigate the color centers (CC) in the products of thermolysis
and photolysis of disperse Al(OH)3 in a vacuum. The spectra were recorded in situ in the region of 2.5–6.0 eV and 4000–12,000 cm−1. It was found that in thermolysis of Al(OH3) production of Al is accompanied, by transformation of the IR spectra of the compound and overtone vibrations of OH groups
and by the appearance of an absorption band (AB) at 4.0 eV with a shoulder at 4.4 eV. A similar AB is induced by UV irradiation
of Al(OH)3 in a vacuum. In the position of the maximum and shape, the AB at 4.0 eV in aluminum oxide produced by thermolysis of Al(OH)3 coincides with the AB of CC responsible for light- and temperature-stimulated degradation of white anode oxide coatings on
Al(Al-AOC). This suggests that in Al-AOC, CC are formed in decay of structural OmHn groups. In Al oxide and in Al-AOC, their nature is discussed with the use of data on optical absorption of radiation-induced
defects in Al2O3.
Research Institute of Physics at St. Petersburg State University, St. Petersburg 1, Ul’yanovskaya St., Petrodvorets St. Petersburg,
198904, Russia. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 65, No. 3, pp. 400–404, May–June, 1998. 相似文献
17.
V. G. Maslov 《Journal of Applied Spectroscopy》1995,62(2):225-228
“S. I. Vavilov State Optical Institute”, All-Russia State Scientific Center, 12, Birzhevaya Liniya, St. Petersburg, 199034,
Russia. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 62, No. 2, pp. 52–56, March–April, 1995 相似文献
18.
The present work is devoted to the development of the method of laser photothermal radiometry with a view to increasing its
spatial resolution over the depth of the specimen when surface layers of the substance of thickness about 1 μm or less are
to be investigated. As an example, results of an investigation of radiation absorption in the surface layer of a lithium niobate
crystal are presented. The absorption index measured at a wavelength of 1.08 μm was ∼0.6 cm−1.
“Polyus” Research Institute, 3, Vernadskii Ave., Moscow, 117342, Russia. Translated from Zhurnal Prikladnoi Spektroskopii,
Vol. 64, No. 1, pp. 82–84, January–February, 1997. 相似文献
19.
L. A. Zhigula T. D. Kolomiitsova S. M. Melikova D. N. Shchepkin 《Journal of Applied Spectroscopy》1997,64(3):310-314
We investigate the IR spectra of solutions of R-21,-22,-116, and R-218 in liquid argon at 90K. The frequencies, half-widths,
and absolute integral intensities of all of the absorption bands recorded are obtained and interpreted.
Scientific-Research Institute of Physics, 1, Ul'yanovskaya Str., Petrodvorets, St. Petersburg, Russia. Translated from Zhurnal
Prikladnoi Spektroskopii, Vol. 64, No. 3, pp. 297–301, May–June, 1997. 相似文献
20.
We discuss a new method of compensation of thermally induced birefringence in cylindrical active elements of solid-body lasers;
the method is based on the simultaneous use of two active elements with sign-opposite temperature gradients in the transverse
direction. Basic features of the method are shown and schemes of its practical implementation are considered.
To whom correspondence should be addressed.
D. F. Ustinov Baltika State Technical University “VOENMEKH”, 1, 1st Krasnoarmeiskaya Str., St. Petersburg, 198005, Russia.
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 66, No. 4, pp. 573–577, July–August, 1999. 相似文献