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The emission spectra of the Swan system of C_2 have been analyzed in order to discuss the production mechanism of C_2 from the three molecules. The vibrational distribution of this system looked like ...a Boltzman distribution and semi-logarithmic plots gave the vibrational temperatures of 22000-30000K (C_2H_2), 30000-46000K (C_2H_4) and 56000-92000K (C_2H_6). The excitation functions have shown four thresholds, which indicate coexistence of four major processes of C_2 production. Doubly-excited Rydberg states are concluded to play important roles in these processes.続きを見る
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