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http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2891| Title: | Quantitative study of cluster growth in free-jet expansions of CO2 by Rayleigh and Raman scattering |
| Keywords: | Supersonic expansion Molecular clusters Raman spectroscopy Rayleigh scattering Cluster size distribution |
| Publisher: | American Physical Society |
| Description: | The condensation produced in supersonic expansions of CO2 is studied quantitatively combining Rayleigh and Raman scattering. The cluster number density nc and the mean cluster size <N> are obtained for five expansions with stagnation pressures P0=1-5 bars, and temperature T0=294 K, along axial and radial directions; nc and <N> are determined from the condensation onset up to a terminal size, verifying the empirical law <N>prop.P0^(2.23). A maximum growth rate d<N>/dt approx.8x10(8) s^(-1) is estimated for the 5-bar expansion. The Raman spectra show a coexistence of solid and liquidlike phases in the jet, with a progressive transition from the liquid to the solid fraction as the clusters increase their size. Ministerio de Educación y Ciencia, Proyectos BFM2001-2276 y FIS2004-02576 Peer reviewed |
| URI: | http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2891 |
| Other Identifiers: | Physical Review A 72, 053204 (2005) 1050-2947 http://hdl.handle.net/10261/2891 10.1103/PhysRevA.72.053204 |
| Appears in Collections: | Digital Csic |
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