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| DC Field | Value | Language |
|---|---|---|
| dc.creator | Fonfría, José Pablo | - |
| dc.creator | Ramos, Ángel | - |
| dc.creator | Thibault, Franck | - |
| dc.creator | Tejeda, Guzmán | - |
| dc.creator | Fernández Sánchez, José María | - |
| dc.creator | Montero, Salvador | - |
| dc.date | 2008-01-30T18:07:20Z | - |
| dc.date | 2008-01-30T18:07:20Z | - |
| dc.date | 2007-10-03 | - |
| dc.date.accessioned | 2017-01-31T00:59:53Z | - |
| dc.date.available | 2017-01-31T00:59:53Z | - |
| dc.identifier | The Journal Of Chemical Physics 127, 134305 (2007) | - |
| dc.identifier | 0021-9606 | - |
| dc.identifier | http://hdl.handle.net/10261/2798 | - |
| dc.identifier | 10.1063/1.2784255 | - |
| dc.identifier.uri | http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2798 | - |
| dc.description | Theory and experiment are combined in a novel approach aimed at establishing a set of two-body state-to-state rates for elementary processes ij->lm in low temperature N2:N2 collisions involving the rotational states i, j, l, m. First, a set of 148 collision cross sections is calculated as a function of the collision energy at the converged close-coupled level via the MOLSCAT code, using a recent potential energy surface for N2–N2. Then, the corresponding rates for the range of 2<T<50 K are derived from the cross sections. The link between theory and experiment, aimed at assessing the calculated rates, is a master equation which accounts for the time evolution of rotational populations in a reference volume of gas in terms of the collision rates. In the experiment, the evolution of rotational populations is measured by Raman spectroscopy in a tiny reference volume 2E-3 mm3 of N2 traveling along the axis of a supersonic jet. The calculated collisional rates are assessed experimentally in the range of 4<T<35 K by means of the master equation, and then are scaled by averaging over a large set of experimental data. The scaled rates account accurately for the evolution of the rotational populations measured in a wide range of conditions. Accuracy of 10% is estimated for the main scaled rates. | - |
| dc.description | This work has been supported by the Spanish Ministerio de Educación y Ciencia, research Project Nos. FIS2004-02576, HF2004-232, ESP2004-21060-E, and ASTROCAM network. J.P.F. is indebted to the CSIC for an I3P grant. | - |
| dc.description | Peer reviewed | - |
| dc.format | 327789 bytes | - |
| dc.format | 3343 bytes | - |
| dc.format | 12700 bytes | - |
| dc.format | application/pdf | - |
| dc.format | text/plain | - |
| dc.format | text/plain | - |
| dc.language | eng | - |
| dc.publisher | American Institute of Physics | - |
| dc.relation | http://dx.doi.org/10.1063/1.2784255 | - |
| dc.rights | openAccess | - |
| dc.subject | nitrogen | - |
| dc.subject | collisions | - |
| dc.subject | low temperature | - |
| dc.title | Inelastic collisions in molecular nitrogen at low temperature (2<T<50 K) | - |
| dc.type | Artículo | - |
| Appears in Collections: | Digital Csic | |
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