Vibrational Energy Transfer in Ortho and Para NH3
| dc.contributor.advisor | Reid, John | |
| dc.contributor.author | Danagher, David | |
| dc.contributor.department | Physics | en_US |
| dc.date.accessioned | 2016-05-11T15:59:10Z | |
| dc.date.available | 2016-05-11T15:59:10Z | |
| dc.date.issued | 1986-09 | |
| dc.description.abstract | <p> An experimental study of vibrational energy transfer in ortho and para NH3(v2) is presented. The vibrational relaxation rates are necessary to characterize mid-IR pulsed and cw NH3 lasers, and the interpretation of these rates is of theoretical importance. Accurate information on the (V-T) process in NH3/N2 mixtures and the (V-V) energy transfer between ortho and para 15NH3 and 14NH3 is now available. </p> <p> First, NH 3 linestrengths and linewidths were accurately measured with a tunable diode laser (TDL) so that ammonia concentrations could be calculated from TDL scans. The energy transfer mechanisms were studied by exciting the v2 vibration of NH3 with a Q-switched cO2 laser and probing the subsequent changes in population with a TDL. A difference in v 2 lifetimes was observed between ortho and para NH3 transitions, and is explained by a (V-V) transfer of energy between the NH3 species. An isolated ortho 15NH3 absorption line was pumped and vibrational transfer of energy was observed to ortho and para 14NH3 and 15NH3. </p> | en_US |
| dc.description.degree | Master of Science (MSc) | en_US |
| dc.description.degreetype | Thesis | en_US |
| dc.identifier.uri | http://hdl.handle.net/11375/19278 | |
| dc.language.iso | en | en_US |
| dc.subject | vibrational energy | en_US |
| dc.subject | energy transfer | en_US |
| dc.subject | ortho | en_US |
| dc.subject | para NH3 | en_US |
| dc.title | Vibrational Energy Transfer in Ortho and Para NH3 | en_US |