Contribution of Hyperfine Structure to the Measured Widths of Gold Hollow-Cathode Lines

Hannaford, Peter

doi:10.1364/josa.62.000265

Cited by 12 publications

(2 citation statements)

References 19 publications

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“…It has been shown that, at constant current, the atoms originating from cathodic sputtering have the same Doppler temperature as the rare gas, at least up to the optimum running pressure Pm (Bacis and Danikre 1970, Bacis 1971, Bruce and Hannaford 1971, Hannaford 1972. By comparing this Doppler temperature with the rotational temperature of the molecules determined in the usual way (Herzberg 1950), we found that the rotational temperature remained very close to the Doppler temperature in the few cases examined.…”

Section: Comparison With Other Types Of Hollow Cathodessupporting

confidence: 57%

Reactions involving the heterolytic cleavage of carbon–element σ-bonds by Grignard reagents

Polivin¹,

Караханов²,

Postnov³

1990

Russ. Chem. Rev.

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The composite wall hollow cathode is a new type of source, set up for studies of the emission spectra due to electronic transitions in diatomic molecules. This lamp is characterized by the wide range of emitted spectra, its stability, its capacity to identify new molecules easily and to emit at low or very low rotational temperature. It is therefore very useful for spectrographic research. It does in fact enable an easy systematic search to be made for spectra which have not yet been observed. Moreover, the possibility of emission at different temperaturesand in particular at very low temperaturefacilitates rotational studies. The best conditions of utilization are described. The lamp is able to run for several months at an intensity of about 50 mA and, for a given low temperature of the discharge gases, it is approximately one hundred times more intense than a traditional hollow cathode lamp. It may therefore be used as a source in high-resolution and spectrometric studies.

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Section: Comparison With Other Types Of Hollow Cathodessupporting

confidence: 57%

Reactions involving the heterolytic cleavage of carbon–element σ-bonds by Grignard reagents

Polivin¹,

Караханов²,

Postnov³

1990

Russ. Chem. Rev.

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“…The low oscillator strength of the 249.2 nm copper line allows the measurement of ground state concentrations in the 1OI3 to 1 0 " ~m -~ range for an absorbing path length of about l cm. The analysis of the absorption measurements follows a well known method (Hannaford 1972) which takes into account both hyperfine splitting and isotope shift, assuming Doppler broadening of each component and using recently published data (Hannaford and McDonald 1978). Gough (1976) has observed a broad-band background absorption due to the presence of metal atom aggregates.…”

Section: Methodsmentioning

confidence: 99%

A high concentration metal vapour beam for lasers

Perry¹,

Tobin²

1984

J. Phys. D: Appl. Phys.

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A compact sputtering device uses a supersonic flow of argon to produce a collimated beam (semi-divergence angle 3 degrees , diameter approximately 10 mm, beam length 200 mm) of metal vapour with a ground state concentration of the order of 1014 cm-3. The concentration increases as the square of the discharge current density over the range 0 to 600 mA cm-2. The gas flow decouples the processes responsible for the sputtering and subsequent excitation of the metal atoms, allowing separate discharges and independent control of the metal atom concentration and of the excitation discharge current. The proposed model describes the influence of the gas flow on an abnormal glow discharge in terms of an effective pressure. This allows the existing theory of the cathode fall to be applied to a glow discharge with a gas flow.

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Absolute analysis by flame atomic absorption spectroscopy: Present status and some problems

Львов

Кацков

Kruglikova

et al. 1976

Spectrochimica Acta Part B: Atomic Spectroscopy

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Contribution of Hyperfine Structure to the Measured Widths of Gold Hollow-Cathode Lines

Cited by 12 publications

References 19 publications

Reactions involving the heterolytic cleavage of carbon–element σ-bonds by Grignard reagents

Reactions involving the heterolytic cleavage of carbon–element σ-bonds by Grignard reagents

A high concentration metal vapour beam for lasers

Absolute analysis by flame atomic absorption spectroscopy: Present status and some problems

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