Collective oscillation in liquid normal tetradecane and normal heptadecane

Autor: J. M. Heller, R. D. Birkhoff, L. R. Painter
Rok vydání: 1975
Předmět:
Zdroj: The Journal of Chemical Physics. 62:4121-4124
ISSN: 1089-7690
0021-9606
DOI: 10.1063/1.430289
Popis: The optical properties of the liquids normal tetradecane (C14H30) and normal heptadecane (C17H36) were determined for photon energies from 4 to 25 eV. Near normal incidence (15 °) reflectance measurements were analyzed by a Kramers–Kronig method to yield the optical parameters n and k, the refractive index and extinction coefficient, respectively. The dielectric properties and the energy loss function were calculated. Structure from optical data in the liquid state is compared with vapor data for normal paraffin hydrocarbons and with solid data for the 26‐ and 36‐normal paraffins. Evidence of collective excitation of electrons in the n‐alkanes is compared with plasma resonances previously identified in the insulating liquids water, glycerol, tetramethyltetraphenyltrisiloxane (DC‐704), and trimethylpentaphenyltrisiloxane (DC‐705).
Databáze: OpenAIRE