Hyperfine structure analysis in the intense spectral lines of the neutral Cu atom falling in the 353–809nm wavelength region using a Fourier transform spectrometer

2014 ◽  
Vol 134 ◽  
pp. 21-28 ◽  
Author(s):  
B.K. Ankush ◽  
M.N. Deo
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Structure Analysis ◽  
Wavelength Region ◽  
Spectral Lines ◽  
Fourier Transform Spectrometer

scholarly journals Nuclear Quadrupole Coupling in the Rotational Spectrum of Thionyl Chloride

1992 ◽  
Vol 47 (11) ◽  
pp. 1150-1152 ◽  
Author(s):  
Ilona Merke ◽  
Helmut Dreizler
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Thionyl Chloride ◽  
Molecular Beam ◽  
Fourier Transform Spectrometer ◽  
Rotational Spectrum ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

Abstract We report on the analysis of the chlorine quadrupole hyperfine structure of thionyl chloride, S035Cl37 Cl, observed with a molecular beam microwave Fourier transform spectrometer

Investigation of the Nitrogen Hyperfine Structure of Vinylisocyanide by Microwave Fourier Transform Spectroscopy in the X-and Ku-Band

1982 ◽  
Vol 37 (1) ◽  
pp. 58-63 ◽  
Author(s):  
G. Bestmann ◽  
H. Dreizler
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Fourier Transform Spectroscopy ◽  
Fourier Transform Spectrometer ◽  
Rotational Transitions ◽  
Ku Band

Abstract In memory of W. H. We discuss the features of a microwave Fourier transform spectrometer in the X-and Ku-band as applied to the investigation of the hyperfine structure of rotational transitions. The Nitrogen-hyperfine structure of vinylisocyanide was measured and analysed.

Nuclear Quadrupole Hyperfine Structure in the Rotational 2Q1-Subbranch of Deuteroisothiocyanic Acid, DNCS

1992 ◽  
Vol 47 (3) ◽  
pp. 511-514 ◽  
Author(s):  
N. Heineking ◽  
H. Dreizler
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Principal Axis ◽  
Quadrupole Coupling Constant ◽  
Fourier Transform Spectrometer ◽  
Coupling Constant ◽  
Internuclear Axis ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

Abstract The two-nuclei quadrupole hyperfine structure of four 2Q1-subbranch transitions of deuteroisothiocyanic acid, DNCS, has been resolved and analyzed by use of a waveguide microwave Fourier transform spectrometer. The analysis yielded one previously unknown quadrupole coupling constant ( χ- ≡ χbb-χcc) for both nitrogen ( χ-N = +27.6(11) kHz) and deuterium X-D = +175.8(11) kHz). Taking into account the results from earlier work on HNCS, DNCS, HNCO, and DNCO, the orientations of the principal axis systems of the two quadrupole coupling tensors could be calculated. It appears that while the deuterium tensor is aligned to the D-N internuclear axis as expected, the nitrogen tensor is tilted away from the bisector of the DNC angle by 13° towards the NCS chain

Nitrogen Quadrupole Coupling in Ethyl Isocyanide, C2H5NC

1985 ◽  
Vol 40 (1) ◽  
pp. 43-45 ◽  
Author(s):  
E. Fliege ◽  
H. Dreizler
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Structure Analysis ◽  
Fourier Transform Spectroscopy ◽  
Quadrupole Coupling

In this paper we present a 14N-quadrupole hyperfine structure analysis for ethyl isocyanide, CH3CH2NC, by use of microwave Fourier transform spectroscopy. For earlier works as e.g. CH3NC [1], such narrow splittings as they are met with in the case of the isonitriles had to be measured employing a maser beam spectrometer.

The high-resolution infrared spectrum of BrCl

1994 ◽  
Vol 72 (11-12) ◽  
pp. 1145-1154 ◽  
Author(s):  
Hiromichi Uehara ◽  
Toichi Konno ◽  
Yasushi Ozaki ◽  
Koui Horiai ◽  
Kuniaki Nakagawa ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Standard Deviation ◽  
High Resolution ◽  
Infrared Spectrum ◽  
Potential Function ◽  
Internuclear Distance ◽  
Spectral Lines ◽  
Fourier Transform Spectrometer ◽  
Isotopic Species ◽  
Correction Terms

The high-resolution infrared spectrum of BrCl has been observed with a Fourier transform spectrometer. About 850 spectral lines for the Δν = 1 sequences of the four isotopic species, 79Br35Cl, 81Br35Cl, 79Br37Cl, and 81Br37Cl have been measured between 417 and 461 cm−1. They have been fitted with a standard deviation of 0.000 146 cm−1 to a Dunham potential function using eight coefficients that included two Watson-type Δ correction terms. Dunham Yij coefficients have been derived for each of the four isotopic species. The equilibrium internuclear distance re of BrCl is 2.136 053 28 (67) Å.

scholarly journals The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder – III. Line identification and off-axis spectra

2020 ◽  
Vol 496 (4) ◽  
pp. 4906-4922 ◽  
Author(s):  
Chris S Benson ◽  
N Hładczuk ◽  
L D Spencer ◽  
A Robb ◽  
J Scott ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Signal To Noise Ratio ◽  
European Space Agency ◽  
Spectral Feature ◽  
Spectral Lines ◽  
Spectral Features ◽  
Fourier Transform Spectrometer ◽  
Line Identification ◽  
Space Agency ◽  
Feature Fitting

ABSTRACT The European Space Agency Herschel Spectral and Photometric Imaging Receiver (SPIRE) Fourier Transform Spectrometer (FTS) Spectral Feature Finder (FF) project is an automated spectral feature fitting routine developed within the SPIRE instrument team to extract all prominent spectral features from all publicly available SPIRE FTS observations. We present the extension of the FF to include the off-axis detectors of the FTS in sparsely sampled single-pointing observations, the results of which have been ingested into the catalogue. We also present the results from an automated routine for identifications of the atomic/molecular transitions that correspond to the spectral features extracted by the FF. We use a template of 307 atomic fine structure and molecular lines that are commonly found in SPIRE FTS spectra for the cross-match. The routine makes use of information provided by the line identification to search for low signal-to-noise ratio features that have been excluded or missed by the iterative FF. In total, the atomic/molecular transitions of 178 942 lines are identified (corresponding to 83 per cent of the entire FF catalogue), and an additional 33 840 spectral lines associated with missing features from SPIRE FTS observations are added to the FF catalogue.

scholarly journals Experimental Investigation of the Hyperfine Structure of Neutral Praseodymium Spectral Lines and Discovery of New Energy Levels

2016 ◽  
Vol 9 (1) ◽  
pp. 7 ◽  
Author(s):  
Shamim Khan ◽  
Imran Siddiqui ◽  
Syed Tanweer Iqbal ◽  
Zaheer Uddin ◽  
G. H. Guthöhrlein ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Laser Excitation ◽  
Energy Levels ◽  
Spectral Lines ◽  
Wave Number ◽  
Experimental Investigations ◽  
Angular Momenta ◽  
New Energy ◽  
Fourier Transform Spectrum

Experimental investigations of Pr I spectral lines were performed by means of laser induced fluorescence spectroscopy, using a hollow cathode discharge lamp as source of free atoms. The wavelengths for the laser excitation were found by the help of a highly resolved Fourier transform spectrum. Altogether we excited 236 unclassified lines and analysed their hyperfine structure, which led, together with the measured wavelengths of the observed fluorescence lines, to the discovery of 32 new even parity and 38 odd parity fine structure energy levels. These levels allow to classify more than 670 spectral lines of Pr I. The wave number calibrated Fourier transform spectrum allowed us to determine the energies of most of these newly discovered levels with an uncertainty of 0.015 cm-1. Angular momenta, parity, and magnetic and electric hyperfine interaction constants (A and B) of the new levels were also determined.

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