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Microwave-optical polarization spectroscopy of theX 2 Σ state of SrF (1983)

Ernst, W. E.

Springer

Applied physics 30 (1983), S. 105-108

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ISSN: 1432-0649

Schlagwort(e): 33.40.Hp ; 35.80.+s

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Hyperfine components in theN=1←0 rotational transition of theX 2Σ state of SrF have been studied with microwave-optical polarization spectroscopy. Of particular interest was the examination of the line shape under the influence of various microwave intensities, cell pressures and small magnetic fields below 1 G. Compensation of the earth's magnetic field with external Helmholtz coils resulted in line widths as small as 600 kHz.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00695463

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Digitale Medien

Accurate determination of wavenumbers for iodine molecular lines in the red spectral region (1989)

Rakowsky, S. ; Zimmermann, D. ; Ernst, W. E.

Springer

Applied physics 48 (1989), S. 463-466

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ISSN: 1432-0649

Schlagwort(e): 3320K ; 4272

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The hyperfine structure of various absorption lines of molecular iodine with wavenumbers between 12980 and 13890 cm−1 has been resolved using Doppler-free polarization spectroscopy. The wavenumbers of theo-component of 17 rovibrational lines of I2 due to the transitionB 3Π ou + −X1∑ g + with even rotational quantum numbers have been determined with an accuracy of 0.001 cm−1. A comparison of the centers of gravity of these 17 lines with the values of the iodine atlas of Gerstenkorn et al. yields a difference of $$\delta \tilde v = \tilde v_{c.g} - \tilde v_{atl} = - (1.8 \pm 1.2)x 10 - 3 cm^{ - 3}$$ thus corroborating the data of the iodine atlas in the red region within limits of error.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00694680

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A molecular beam laser-microwave double-resonance spectrometer for precise measurements of high temperature molecules (1983)

Ernst, W. E. ; Kindt, S.

Springer

Applied physics 31 (1983), S. 79-83

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ISSN: 1432-0649

Schlagwort(e): 35.80.+s ; 33.40.Hp

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A laser-microwave double-resonance experiment has been developped basing on the principle of the known laser-rf double-resonance technique. This novel beam experiment allows high-resolution measurements of rotational transitions in a molecular ground state. The method was applied to the high-temperature radical CaCl to study the hyperfine structure of transitions between low-lying rotational states. Microwave scans yielded linewidths of 15–20 kHz limited only by time-of-flight broadening and residual Zeeman splitting.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00702602

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Polarization spectroscopy of Sr79Br and Sr81Br: Analysis of theX 2 Σ + andB 2 Σ + hyperfine structure (1986)

Ernst, W. E. ; Schröder, J. O.

Springer

The European physical journal 1 (1986), S. 103-112

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ISSN: 1434-6079

Schlagwort(e): 33.40.Hp ; 33.20.Kf ; 35.20.Sd

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Microwave optical polarization spectroscopy has been used to measure the hyperfine structure in theX 2 Σ + (v=0) electronic ground state of Sr79Br and Sr81Br. Optical hyperfine structure in theB 2 Σ +−X 2 Σ + (0,0) system was resolved by Doppler-free laser polarization spectroscopy. The magnetic hyperfine parametersb andc and the electricquadrupole hfs parametereqQ were determined for theX 2 Σ + andB 2 Σ + states of both molecules. The magnetic hfs has been interpreted as an effect of halide electron spin polarization. The electric quadrupole coupling constants are compared with the alkali halides and discussed in terms of Sternheimer antishielding in polar molecules.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01384664

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