Spectroscopy of methylene: Einstein coefficients for CH2(b̃ 1B1–ã 1A1) transitions
| العنوان: | Spectroscopy of methylene: Einstein coefficients for CH2(b̃ 1B1–ã 1A1) transitions |
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| المؤلفون: | C. Bradley Moore, I. Garcia‐Moreno |
| المصدر: | The Journal of Chemical Physics. 99:6429-6435 |
| بيانات النشر: | AIP Publishing, 1993. |
| سنة النشر: | 1993 |
| مصطلحات موضوعية: | Dye laser, General Physics and Astronomy, Rotational–vibrational spectroscopy, chemistry.chemical_compound, symbols.namesake, chemistry, Einstein coefficients, Franck–Condon principle, Excited state, symbols, Emission spectrum, Physical and Theoretical Chemistry, Atomic physics, Methylene, Spectroscopy |
| الوصف: | The b 1B1→a 1A1 emission spectrum of the CH2 radical has been studied in the 13 330–18 180 cm−1 region. Methylene (a 1A1) is produced by photolysis of ketene at 308 nm and excited to single rovibrational levels of the b 1B1 state by a tunable pulsed dye laser. The emission from the b 1B1 state is spectrally dispersed with a resolution of 0.25 A. Term values and transitions are reported for new levels of the b 1B1(0,v2,0) (v2=14 and 15) and a 1A1(0,0,0) states with J≥6 and 0≤Ka≤6. Unusually intense ΔKa=3 transitions and several ΔKa=5 transitions are observed. Analysis of the emission spectra gives the relative intensities of transitions from a selected rovibrational level in the upper b 1B1 state to rovibrational levels in the a 1A1 state. These relative intensities together with the fluorescence lifetimes of the b 1B1 levels determine the absolute Einstein emission coefficients for rovibronic transitions in the visible spectrum of methylene. These data permit accurate measurement of rovibrationa... |
| تدمد: | 1089-7690 0021-9606 |
| DOI: | 10.1063/1.465882 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::ceaebaff18ed9326658252f51ff4e455 https://doi.org/10.1063/1.465882 |
| رقم الانضمام: | edsair.doi...........ceaebaff18ed9326658252f51ff4e455 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10897690 00219606 |
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| DOI: | 10.1063/1.465882 |