The refractive indices of thin films of vacuum condensates cryo methane
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Keywords:
phase transition, cryocondesate,refractive index, methane, temperature of condensationAbstract
In this paper we investigate the dependence of the refractive index n of cryocondensates of CH4 from methane condensation temperature T. A comparative analysis of the values of refractive index n and density ρ cryocondensates methane CH4, ammonia NH3, carbon dioxide CO2 and water H2O. These values of the coefficients of refraction n of methane CH4 with decreasing condensation temperature T undergoes rupture in the vicinity of the phase transition temperature associated with the freezing of degrees of freedom of a quarter of molecules. The coefficient of refraction n of carbon dioxide CO2 with decreasing temperature T undergoes the greatest change at 77K 1.41 and 1.28 at 20K. For cryocondensation H2O water temperature changes did not affect the values of the refractive index, n. These results can be used in astrophysical research.
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3 Colwell J.H., Gill E.K. and Morrison J.A. Thermodynamic properties of CH4 and CD4. Interpretations of the properties of the solids // J. Chem. Phys. – 1963.– Vol.39. – P.635-653.
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5 Bartholorne E., Drikos G. and Eucken A. //Z. Phys. Chern. – 1938. – Vol. 39. – P. 371-373.
6 Прохвaтилов A.И., Исaкинa A.П., Пaрaметры решетки, коэффициенты теплового рaсширения и плотность вaкaнсии в твердом CH4 //Физикa низких темперaтур. – 1983. – Т.9. – С.419-427.
7 Baer D.R., Fraase B.A., Riehl D.H., Simmons R.O. // J. Chem. Phys. – 1978. – Vol. 68 (4). – P. 1411.
8 Nijman A.J., Trappeniers N.J. A High Pressure NMR Study of Solid Methane // Physica. – 1978. – Vol. 95B. – P. 147-162.
9 Beckman P.A., Bloom M., Ozier I. //Can. Jour. of Phys. – 1976. – Vol. 45(16). – P. 1712.
10 Buchman S., Candela D., Wetterling W.T., Pound R.V. Spin Species Conversion Rate in Solid CH4 in the temperature range 4-23K // Phys. Rev. B. – 1982. – Vol.26. – P. 198-209.
11 Chapados C., Cabana A., Infrared Spectra and Structure of Solid CH4 and CD4 in phases I and II //Can. Jour. of Chem. – 1972. – Vol. 50. – P. 3521-3533.
12 Miyamoto Y., Fushitani M., Ando D., and Momose T., Nuclear Spin Conversion of Methane in Solid Parahydrogen // J. of Chem. Phys. – 2008.– Vol. 114502. – P. 128-137.
13 Бaгaцкий М.И., Мaнжелий В.Г., Мaщенко Д.A., Дудкин В.В., Теплоемкость твердых рaстворов дейтерометaнa в криптоне. Спин-ядернaя конверсия молекул CD4 // Физикa низких темперaтур. – 2003. – Т. 29.– С. 1352-1362.
14 Bagatskii M.I., Manzhelii V.G., Minchina I.Ya., Mashchenko D.A., Gospodarev I.A. // Jour. of Low Temp. Phys. – 2003. – Vol. 130(516). – P. 459.
15 Pisarska E., Stachwiak P., Jezowski A. // Физикa низких темперaтур. – 2007. – V. 33, N 6(7) – P. 768.
16 Manzhelii V.G. and Tolkachev A.M. Densities of Ammonia and Methane in the Solid State // Phys. Solid State. – 1963. – Vol.5. – P. 3413-3419.
17 Martonchik J. and Orton G. Optical constants of liquid and solid methane//Applied Optics. – 1994. – Vol. 12. – P.1-30.
18 Ramsey W.H. On the densities of methane, metallic ammonium, water and neon at planetary pressures // Royal Astr. Soc. – 1963. – Vol. 125. – P. 469-485.
19 Nijman A.J. Berlinsky A.J. Theory of Nuclear Spin Conversion in the β Phase of Solid Methane // Phys. Rev. Lett. – 1977. – Vol. 8. – P. 408-411.
20 Nijman A.J., Berlinsky A.J. Theory of nuclear spin conversion in β-phase of solid CH4 // Can. Jour. of Phys. – 1980. – Vol. 58. – P. 1049-1069.
21 Wood B.E. and Roux J.A.Infrared optical properties of thin H2O, NH3, and CO2 cryofilms // J. Opt. Soc.Am. – 1982. – Vol. 72(6). – P. 720-728.
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Дробышев, А., Соколов, Д., Aбдуллaевa Ф., Кaнтaевa М., & Дуйсебaев Т. (2016). The refractive indices of thin films of vacuum condensates cryo methane. Recent Contributions to Physics (Rec.Contr.Phys.), 58(3), 34–40. Retrieved from https://bph.kaznu.kz/index.php/zhuzhu/article/view/472
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Thermal Physics and Theoretical Thermal Engineering
