High-resolving-power spectrometer with digital photorecording, based on the DFS-8 spectrograph

Lavrov, B. P.; Mikhailov, A. S.; Umrikhin, I. S.

doi:10.1364/jot.78.000180

Cited by 6 publications

(12 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our studies showed that in HFS of Hg spectral lines [13] and in the low resolution experiments approximation of line profiles by Gaussian function f i (x) = exp − …”

mentioning

confidence: 77%

“…To reach required value of SNR we made many records (up to 150 shots for the same wavelength fragment and the same discharge conditions). Averaging of those results made it possible to reach SNR value up to 10 4 (see [13]). For recording the D 2 spectra with low resolution, high sensitivity and large population of high rotational levels we used hot-cathode capillary-arc discharge lamp LD-2D described in [15] (pure D 2 under pressure ≈ 6 Torr, capillary inner diameter Ø2 mm, current density ≈ 10 A/cm 2 ).…”

mentioning

confidence: 97%

See 1 more Smart Citation

Observation of the fine structure for rovibronic spectral lines in the visible part of emission spectra ofD2

2012

Self Cite

View full text Add to dashboard Cite

For the first time in visible part of the D2 emission spectrum the pseudo doublets representing partly resolved fine structure of rovibronic lines have been observed. They are characterized by splitting values about 0.2 cm −1 and relative intensity of the doublet components close to 2.0. It is shown that they are determined by triplet splitting in lower rovibronic levels of various 3 Λ ± g → c 3 Π − u electronic transitions. It is proposed to use an existence of such partly resolved fine structure patterns for identification of numerous unassigned spectral lines of the D2 molecule coming from great variety of triplet "gerade" electronic states to vibro-rotational levels of the c 3 Π − u state.The present paper reports new observations concerning triplet-triplet electronic-vibro-rotational (rovibronic) spectral lines in visible part of the emission spectrum of the D 2 molecule. There are several peculiarities of current knowledge of triplet rovibronic states and radiative transitions between them which make it possible to consider this knowledge as insufficient and which motivated our experimental studies.Most of spectral lines in visible and near infrared parts of the emission spectrum of molecular deuterium are not classified so far. Thus, for example in the latest compilation of experimental data [1] the working list of 27488 recorded lines (within the wavelength ranges ≈ 309−1192 and 1647 − 2780 nm) contains only 8243 assignments. In our opinion it is difficult to consider such situation as normal for an isotopomer of simplest neutral molecule (four-particle quantum system).Almost 1931 [10] exactly in visible part of the spectrum (see also [9]). Although both isotopomers should have similar values of the FS splitting it's observation in visible spectrum of the D 2 molecule was not reported in the literature known to authors.The goal of present work was to study an opportunity of resolving the fine structure in visible spectrum of the D 2 molecule by means of spectroscopic technique developed in [11][12][13]. It is based on achieving certain level of "optical resolution" of a spectrograph, recording spectral intensity distributions by matrix photoelectric detector, and by numerical deconvolution (inverse to the convolution operation) of recorded spectra. In dense multiline rovibronic spectra of H 2 and D 2 molecules actual "digital resolution" achievable by our technique could be much higher than "optical resolution" of spectrometer which is limited not by its resolving power but by large Doppler broadening of spectral lines (see below). Thus it is possible to speak about some kind of sub-Doppler high res-

show abstract

“…Our studies showed that in HFS of Hg spectral lines [13] and in the low resolution experiments approximation of line profiles by Gaussian function f i (x) = exp − …”

mentioning

confidence: 77%

mentioning

confidence: 97%

Observation of the fine structure for rovibronic spectral lines in the visible part of emission spectra ofD2

2012

Self Cite

View full text Add to dashboard Cite

show abstract

“…We used experimental setup described elsewhere [22,24]. Emission of plasma inside molybdenum capillary located between anode and cathode of a gas discharge tube was used as a light source.…”

Section: Methodsmentioning

confidence: 99%

“…The flux of radiation through a hole in an anode was focused by achromatic lens on the entrance slit of the spectrometer. Detailed description of the selfmade high resolution automatic spectrometer and corresponding software was reported in [24]. The 2.65 m Ebert-Fastie spectrograph with 1800 grooves per mm diffraction grating was equipped with additional camera lens (that gives effective focus length F = 6786±8 mm) and computer-controlled CMOS matrix detector (22.2 × 14.8 mm 2 , 1728 × 1152 pixels).…”

Section: Methodsmentioning

confidence: 99%

“…It should be emphasized once more that the overwhelming majority of data on the wavenumbers for rovibronic transitions of the D 2 molecule was obtained by photographic recording of spectra. Our way of determination of the rovibronic transition wavenumbers developed in [20,22,24] is based on linear response of the CMOS matrix detector on the spectral irradiance and digital intensity recording. Both things provide an extremely important advantage of our technique over traditional photographic recording with microphotometric comparator reading.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

New set of experimental wavenumber values for visible part of emission spectrum ($545 ÷627$ nm) of the $D_2$ molecule with partly resolved fine structure of triplet-triplet rovibronic transitions

Lavrov,

Umrikhin

2011

Preprint

Self Cite

View full text Add to dashboard Cite

New set of wavenumber values for electronic-vibro-rotational (rovibronic) transitions in limited part of the emission spectrum of the D 2 molecule (545 ÷ 627 nm) have been measured with a precision 0.007 ÷ 0.1 cm −1 depending on the translational temperature in plasma, the signal-to-noise ratio, and the degree of overlap with adjacent spectral lines. For the first time partly resolved fine structure of the D 2 spectral lines has been observed in the visible part of the spectrum. Table II (Continued). K 1 ν (a) ν ν (c) K 2

show abstract

Atlas and wavenumber tables for the visible part of the electronic-vibro-rotational D2 spectrum emitted by low-temperature plasma

Lavrov

Umrikhin

2016

Journal of Quantitative Spectroscopy and Radiative Transfer

View full text Add to dashboard Cite

High-resolving-power spectrometer with digital photorecording, based on the DFS-8 spectrograph

Cited by 6 publications

References 8 publications

Observation of the fine structure for rovibronic spectral lines in the visible part of emission spectra ofD2

Observation of the fine structure for rovibronic spectral lines in the visible part of emission spectra ofD2

New set of experimental wavenumber values for visible part of emission spectrum ($545 ÷627$ nm) of the $D_2$ molecule with partly resolved fine structure of triplet-triplet rovibronic transitions

Atlas and wavenumber tables for the visible part of the electronic-vibro-rotational D2 spectrum emitted by low-temperature plasma

Contact Info

Product

Resources

About