Rate constants for collisional quenching of NO (A(2)Σ(+), v = 0) by He, Ne, Ar, Kr, and Xe, and infrared emission accompanying rare gas and impurity quenching.
The quenching rates of NO (A(2)Σ(+), v = 0) with He, Ne, Ar, Kr and Xe have been studied at room temperature by measurements of the time dependence of the fluorescence decay following laser excitation. The rates are slow, with upper limits of rate constants determined as between 1.2 and 2.0 × 10(-14...
| Huvudupphovsmän: | , |
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| Materialtyp: | Journal article |
| Språk: | English |
| Publicerad: |
Royal Society of Chemistry
2014
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| _version_ | 1826259571354632192 |
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| author | Few, J Hancock, G |
| author_facet | Few, J Hancock, G |
| author_sort | Few, J |
| collection | OXFORD |
| description | The quenching rates of NO (A(2)Σ(+), v = 0) with He, Ne, Ar, Kr and Xe have been studied at room temperature by measurements of the time dependence of the fluorescence decay following laser excitation. The rates are slow, with upper limits of rate constants determined as between 1.2 and 2.0 × 10(-14) cm(3) molecule(-1) s(-1), considerably lower than those reported before in the literature. Such slow rates can be markedly influenced by impurities such as O2 and H2O which have quenching rate constants close to gas kinetic values. Time resolved Fourier transform infrared emission has been used to observe the products of the quenching processes with the rare gases and with impurities. For He, Ne Ar and Kr there is no difference within experimental error of the populations in NO (X(2)Π v ≥ 2) produced with and without rare gas present, but the low quantum yields of such quenching (of the order of 5% for an atmosphere of rare gas) preclude quantitative information on the quantum states being obtained. For quenching by Xe the collisional formation of electronically excited Xe atoms dominates the emission at early times. Vibrationally excited NO (X(2)Π, v) and products of reactive quenching are observed in the presence of O2 and H2O. |
| first_indexed | 2024-03-06T18:51:59Z |
| format | Journal article |
| id | oxford-uuid:108b1df0-9106-41eb-842f-2a124e9c0c9f |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:51:59Z |
| publishDate | 2014 |
| publisher | Royal Society of Chemistry |
| record_format | dspace |
| spelling | oxford-uuid:108b1df0-9106-41eb-842f-2a124e9c0c9f2022-03-26T09:57:00ZRate constants for collisional quenching of NO (A(2)Σ(+), v = 0) by He, Ne, Ar, Kr, and Xe, and infrared emission accompanying rare gas and impurity quenching.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:108b1df0-9106-41eb-842f-2a124e9c0c9fEnglishSymplectic Elements at OxfordRoyal Society of Chemistry2014Few, JHancock, GThe quenching rates of NO (A(2)Σ(+), v = 0) with He, Ne, Ar, Kr and Xe have been studied at room temperature by measurements of the time dependence of the fluorescence decay following laser excitation. The rates are slow, with upper limits of rate constants determined as between 1.2 and 2.0 × 10(-14) cm(3) molecule(-1) s(-1), considerably lower than those reported before in the literature. Such slow rates can be markedly influenced by impurities such as O2 and H2O which have quenching rate constants close to gas kinetic values. Time resolved Fourier transform infrared emission has been used to observe the products of the quenching processes with the rare gases and with impurities. For He, Ne Ar and Kr there is no difference within experimental error of the populations in NO (X(2)Π v ≥ 2) produced with and without rare gas present, but the low quantum yields of such quenching (of the order of 5% for an atmosphere of rare gas) preclude quantitative information on the quantum states being obtained. For quenching by Xe the collisional formation of electronically excited Xe atoms dominates the emission at early times. Vibrationally excited NO (X(2)Π, v) and products of reactive quenching are observed in the presence of O2 and H2O. |
| spellingShingle | Few, J Hancock, G Rate constants for collisional quenching of NO (A(2)Σ(+), v = 0) by He, Ne, Ar, Kr, and Xe, and infrared emission accompanying rare gas and impurity quenching. |
| title | Rate constants for collisional quenching of NO (A(2)Σ(+), v = 0) by He, Ne, Ar, Kr, and Xe, and infrared emission accompanying rare gas and impurity quenching. |
| title_full | Rate constants for collisional quenching of NO (A(2)Σ(+), v = 0) by He, Ne, Ar, Kr, and Xe, and infrared emission accompanying rare gas and impurity quenching. |
| title_fullStr | Rate constants for collisional quenching of NO (A(2)Σ(+), v = 0) by He, Ne, Ar, Kr, and Xe, and infrared emission accompanying rare gas and impurity quenching. |
| title_full_unstemmed | Rate constants for collisional quenching of NO (A(2)Σ(+), v = 0) by He, Ne, Ar, Kr, and Xe, and infrared emission accompanying rare gas and impurity quenching. |
| title_short | Rate constants for collisional quenching of NO (A(2)Σ(+), v = 0) by He, Ne, Ar, Kr, and Xe, and infrared emission accompanying rare gas and impurity quenching. |
| title_sort | rate constants for collisional quenching of no a 2 σ v 0 by he ne ar kr and xe and infrared emission accompanying rare gas and impurity quenching |
| work_keys_str_mv | AT fewj rateconstantsforcollisionalquenchingofnoa2sv0byhenearkrandxeandinfraredemissionaccompanyingraregasandimpurityquenching AT hancockg rateconstantsforcollisionalquenchingofnoa2sv0byhenearkrandxeandinfraredemissionaccompanyingraregasandimpurityquenching |