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- W2077033712 abstract "The paper reports the quantitative modelling of the chemistry of the He(23S) and He2(23 Sigma u+) metastables in a pulsed helium afterglow at 1.86 Torr. A comprehensive nine-term model is used to fit spectroscopic measurements of the time-dependent evolution of metastable concentrations. The same coefficients are found adequate to predict the time-dependence of the electron density as measured with a microwave Fabry-Perot interferometer. Rate coefficients obtained agree with previous values where such prior measurements have been made and in other cases the first measurements for those reactions are reported. In particular, a rate coefficient of (3.85+or-0.5)*10-9cm3s-1 has been found for the reaction He2(23 Sigma u+)+He2(23 Sigma u+); a value of (1.7+or-0.4)*10-9cm3s-1 for He2(23 Sigma u+)+e; and an upper limit of 0.8*10-9cm3s-1 for He2(23 Sigma u+)." @default.
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- W2077033712 date "1975-01-11" @default.
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- W2077033712 title "Excited state chemistry of the low-pressure helium afterglow. I. Reactions involving metastable species, 23S and 2s3Σu+" @default.
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- W2077033712 doi "https://doi.org/10.1088/0022-3700/8/1/018" @default.
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