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Garberoglio G, Harvey AH, Jeziorski B. Path-integral calculation of the third dielectric virial coefficient of noble gases. J Chem Phys 2021; 155:234103. [PMID: 34937356 DOI: 10.1063/5.0077684] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a rigorous framework for fully quantum calculation of the third dielectric virial coefficient Cɛ(T) of noble gases, including exchange effects. The quantum effects are taken into account with the path-integral Monte Carlo method. Calculations employing state-of-the-art pair and three-body potentials and pair polarizabilities yield results generally consistent with the few scattered experimental data available for helium, neon, and argon, but rigorous calculations with well-described uncertainties will require the development of surfaces for the three-body nonadditive polarizability and the three-body dipole moment. The framework, developed here for the first time, will enable new approaches to primary temperature and pressure metrology based on first-principles calculations of gas properties.
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Affiliation(s)
- Giovanni Garberoglio
- European Centre for Theoretical Studies in Nuclear Physics and Related Areas (FBK-ECT*), Trento I-38123, Italy
| | - Allan H Harvey
- Applied Chemicals and Materials Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - Bogumił Jeziorski
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
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2
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The Short-Term Performances of Two Independent Gas Modulated Refractometers for Pressure Assessments. SENSORS 2021; 21:s21186272. [PMID: 34577478 PMCID: PMC8469679 DOI: 10.3390/s21186272] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/11/2021] [Accepted: 09/13/2021] [Indexed: 11/17/2022]
Abstract
Refractometry is a powerful technique for pressure assessments that, due to the recent redefinition of the SI system, also offers a new route to realizing the SI unit of pressure, the Pascal. Gas modulation refractometry (GAMOR) is a methodology that has demonstrated an outstanding ability to mitigate the influences of drifts and fluctuations, leading to long-term precision in the 10−7 region. However, its short-term performance, which is of importance for a variety of applications, has not yet been scrutinized. To assess this, we investigated the short-term performance (in terms of precision) of two similar, but independent, dual Fabry–Perot cavity refractometers utilizing the GAMOR methodology. Both systems assessed the same pressure produced by a dead weight piston gauge. That way, their short-term responses were assessed without being compromised by any pressure fluctuations produced by the piston gauge or the gas delivery system. We found that the two refractometer systems have a significantly higher degree of concordance (in the 10−8 range at 1 s) than what either of them has with the piston gauge. This shows that the refractometry systems under scrutiny are capable of assessing rapidly varying pressures (with bandwidths up to 2 Hz) with precision in the 10−8 range.
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Garberoglio G, Harvey AH. Path-Integral Calculation of the Second Dielectric and Refractivity Virial Coefficients of Helium, Neon, and Argon. JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY 2020; 125:125022. [PMID: 39081565 PMCID: PMC11239192 DOI: 10.6028/jres.125.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 07/02/2020] [Indexed: 08/02/2024]
Abstract
We present a method to calculate dielectric and refractivity virial coefficients using the path-integral Monte Carlo formulation of quantum statistical mechanics and validate it by comparing our results with equivalent calculations in the literature and with more traditional quantum calculations based on wavefunctions. We use state-of-the-art pair potentials and polarizabilities to calculate the second dielectric and refractivity virial coefficients of helium (both 3He and 4He), neon (both 20Ne and 22Ne), and argon. Our calculations extend to temperatures as low as 1 K for helium, 4 K for neon, and 50 K for argon. We estimate the contributions to the uncertainty of the calculated dielectric virial coefficients for helium and argon, finding that the uncertainty of the pair polarizability is by far the greatest contribution. Agreement with the limited experimental data available is generally good, but our results have smaller uncertainties, especially for helium. Our approach can be generalized in a straightforward manner to higher-order coefficients.
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Affiliation(s)
- Giovanni Garberoglio
- European Centre for Theoretical Studies in Nuclear
Physics and Related Areas (FBK-ECT*) and Trento Institute for Fundamental Physics and
Applications (TIFPA-INFN), Trento, I-38123, Italy
| | - Allan H. Harvey
- European Centre for Theoretical Studies in Nuclear
Physics and Related Areas (FBK-ECT*) and Trento Institute for Fundamental Physics and
Applications (TIFPA-INFN), Trento, I-38123, Italy
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Silander I, Forssén C, Zakrisson J, Zelan M, Axner O. Invar-based refractometer for pressure assessments. OPTICS LETTERS 2020; 45:2652-2655. [PMID: 32356839 DOI: 10.1364/ol.391708] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 04/06/2020] [Indexed: 06/11/2023]
Abstract
Gas modulation refractometry (GAMOR) is a methodology that can mitigate fluctuations and drifts in refractometry. This can open up for the use of non-conventional cavity spacer materials. In this paper, we report a dual-cavity system based on Invar that shows better precision for assessment of pressure than a similar system based on Zerodur. This refractometer shows for empty cavity measurements, up to 104 s, a white noise response (for N2) of 3 mPa s1/2. At 4303 Pa, the system has a minimum Allan deviation of 0.34 mPa (0.08 ppm) and a long-term stability (24 h) of 0.7 mPa. This shows that the GAMOR methodology allows for the use of alternative cavity materials.
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Egan PF, Stone JA, Ricker JE, Hendricks JH. Comparison measurements of low-pressure between a laser refractometer and ultrasonic manometer. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:053113. [PMID: 27250398 PMCID: PMC4947230 DOI: 10.1063/1.4949504] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
We have developed a new low-pressure sensor which is based on the measurement of (nitrogen) gas refractivity inside a Fabry-Perot cavity. We compare pressure determinations via this laser refractometer to that of well-established ultrasonic manometers throughout the range 100 Pa to 180 000 Pa. The refractometer demonstrates 10(-6) ⋅ p reproducibility for p > 100 Pa, and this precision outperforms a manometer. We also claim the refractometer has an expanded uncertainty of U(pFP) = [(2.0 mPa)(2) + (8.8 × 10(-6) ⋅ p)(2)](1/2), as realized through the properties of nitrogen gas; we argue that a transfer of the pascal to p < 1 kPa using a laser refractometer is more accurate than the current primary realization.
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Chrysos M, Dixneuf S, Rachet F. On the isotropic Raman spectrum of Ar2 and how to benchmark ab initio calculations of small atomic clusters: Paradox lost. J Chem Phys 2015; 143:024304. [DOI: 10.1063/1.4923370] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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7
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Piszczatowski K, Puchalski M, Komasa J, Jeziorski B, Szalewicz K. Frequency-dependent polarizability of helium including relativistic effects with nuclear recoil terms. PHYSICAL REVIEW LETTERS 2015; 114:173004. [PMID: 25978230 DOI: 10.1103/physrevlett.114.173004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Indexed: 06/04/2023]
Abstract
Future metrology standards will be partly based on physical quantities computed from first principles rather than measured. In particular, a new pressure standard can be established if the dynamic polarizability of helium can be determined from theory with an uncertainty smaller than 0.2 ppm. We present calculations of the frequency-dependent part of this quantity including relativistic effects with full account of leading nuclear recoil terms and using highly optimized explicitly correlated basis sets. A particular emphasis is put on uncertainty estimates. At the He-Ne laser wavelength of 632.9908 nm, the computed polarizability value of 1.39181141 a.u. has uncertainty of 0.1 ppm that is 2 orders of magnitude smaller than those of the most accurate polarizability measurements. We also obtained an accurate expansion of the helium refractive index in powers of density.
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Affiliation(s)
- Konrad Piszczatowski
- Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA
| | - Mariusz Puchalski
- Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89B, 61-614 Poznań, Poland
| | - Jacek Komasa
- Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89B, 61-614 Poznań, Poland
| | - Bogumił Jeziorski
- Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Krzysztof Szalewicz
- Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA
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Lee SY, Lee MH, Park Y, You SS. Modeling for Ligand-Capped Metallic Nanoparticles in a Gas-Expanded Liquids System: Surface Fraction Model. Ind Eng Chem Res 2013. [DOI: 10.1021/ie300816t] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Seong Yun Lee
- Department of Applied Chemical
Engineering, Korea University of Technology and Education, 307 Gajeon-ri, Byeongcheon-myeon, Cheonan-city, Korea 330-708
| | - Mun Hyeong Lee
- Department of Applied Chemical
Engineering, Korea University of Technology and Education, 307 Gajeon-ri, Byeongcheon-myeon, Cheonan-city, Korea 330-708
| | - YoonKook Park
- Department of Biological and
Chemical Engineering, Hongik University, Sejong, Korea 339-701
| | - Seong-Sik You
- Department of Applied Chemical
Engineering, Korea University of Technology and Education, 307 Gajeon-ri, Byeongcheon-myeon, Cheonan-city, Korea 330-708
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Egan P, Stone JA. Absolute refractometry of dry gas to ±3 parts in 10⁹. APPLIED OPTICS 2011; 50:3076-3086. [PMID: 21743505 DOI: 10.1364/ao.50.003076] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We present a method of measuring the refractive index of dry gases absolutely at 632.8 nm wavelength using a Fabry-Perot cavity with an expanded uncertainty of <3×10⁻⁹ (coverage factor k=2). The main contribution to this uncertainty is how well vacuum-to-atmosphere compression effects (physical length variation) in the cavities can be corrected. This paper describes the technique and reports reference values for the refractive indices of nitrogen and argon gases at 100 kPa and 20 °C with an expanded uncertainty of <9×10⁻⁹ (coverage factor k=2), with the additional and larger part of this uncertainty coming from the pressure and temperature measurement.
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Affiliation(s)
- Patrick Egan
- National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, USA
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10
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EL-Kader M. Spectral line-shapes and moment analysis in isotropic and anisotropic light scattering spectra for gaseous argon. Mol Phys 2011. [DOI: 10.1080/00268976.2011.556830] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Vogel E, Jäger B, Hellmann R, Bich E. Ab initiopair potential energy curve for the argon atom pair and thermophysical properties for the dilute argon gas. II. Thermophysical properties for low-density argon. Mol Phys 2010. [DOI: 10.1080/00268976.2010.507557] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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12
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Kerl K, Hohm U, Varchmin H. Polarizability α (ω, T, ρ) of Small Molecules in the Gas Phase. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19920960517] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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13
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Zhang J, Lu ZH, Wang LJ. Precision measurement of the refractive index of carbon dioxide with a frequency comb. OPTICS LETTERS 2007; 32:3212-3214. [PMID: 17975647 DOI: 10.1364/ol.32.003212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We report a higher precision measurement of the refractive index of carbon dioxide using a frequency comb as the light source in a Mach-Zehnder interferometer setup. The experimental sensitivity can reach the level of 8.8x10(-9). Taking into account the measurement accuracy of temperature and pressure, the experimental accuracy has a value of 1.2x10(-8). The measurement result has a deviation from the commonly quoted result [Old , J. Opt. Soc. Am.61, 89 (1971)] by 6.4x10(-7) at 800 nm.
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Affiliation(s)
- J Zhang
- Institute of Optics, Information and Photonics, Max-Planck Research Group and University Erlangen-Nuremberg, Germany
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Li X, Ahuja C, Harrison JF, Hunt KLC. The collision-induced polarizability of a pair of hydrogen molecules. J Chem Phys 2007; 126:214302. [PMID: 17567191 DOI: 10.1063/1.2121548] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Collision-induced light scattering, impulsive stimulated scattering, and subpicosecond-induced birefringence all depend on the transient changes Deltaalpha in molecular polarizabilities that occur when molecules collide. Ab initio results for Deltaalpha are needed to permit comparisons with accurate experimental results for these spectra and for refractive index virial coefficients and dielectric virial coefficients. In this work, we provide results for Deltaalpha for a pair of hydrogen molecules, treated at CCSD(T) level, with an aug-cc-pV5Z (spdf) basis set. Our values replace the best previous ab initio results for the variation of Deltaalpha with intermolecular separation, the self-consistent-field results obtained by Bounds [Mol. Phys. 38, 2099 (1979)] with a relatively small (3s2p) basis set for H2. For the six geometrical configurations studied by Bounds, the inclusion of correlation and improvements in the basis tend to increase both the trace Deltaalpha(0)0 and the anisotropy Deltaalpha2m of the pair polarizability. The change in the anisotropy is relatively small, but our values for the trace differ by factors of 2 or more from Bounds' results. For use in computing experimental line shapes, intensities, and virial coefficients, we have calculated Deltaalpha for 18 different relative orientations of a pair of H2 molecules, with the intermolecular separation R ranging from 2 a.u. (3 a.u. for a linear pair) to 10 a.u. The H2 bond length is fixed at the vibrationally averaged internuclear separation in the ground state r=1.449 a.u. Our results agree well with the CCSD(T) results for Deltaalpha obtained by Maroulis [J. Phys. Chem. A 104, 4772 (2000)] for two pair configurations of H2...H2 (linear and T-shaped) at a fixed internuclear distance of R=6.5 a.u. in a [6s4p1d] basis. As the intermolecular distance increases (for R>or=8 a.u.), the spherical-tensor components of Deltaalpha converge to the results from a long-range model that includes dipole-induced-dipole (DID) interactions, higher-multipole induction, nonuniformity of the local field, hyperpolarization, and van der Waals dispersion. Deviations from the first-order DID model are still evident for R between 8 and 10 a.u. in most orientations of the pair. At shorter range, overlap damping, exchange, and orbital distortion reduce both Deltaalpha0(0) and Deltaalpha(2)0 below their long-range limiting forms.
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Affiliation(s)
- X Li
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
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15
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16
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Hohm U. Experimental determination of the dispersion in the mean linear dipole polarizability α(ω) of small hydrocarbons and evaluation of Cauchy moments between 325 nm and 633 nm. Mol Phys 2006. [DOI: 10.1080/00268979300100621] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Uwe Hohm
- a Institut für Physikalische und Theoretische Chemie der Technischen Universität Braunschweig , Hans-Sommer-Straße 10, D-3300 , Braunschweig , Germany
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17
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Li D, McHugh MA, van Zanten JH. Density-Induced Phase Separation in Poly(ethylene-co-1-butene)−Dimethyl Ether Solutions. Macromolecules 2005. [DOI: 10.1021/ma048166y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- D. Li
- Department of Chemical Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, and Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905
| | - M. A. McHugh
- Department of Chemical Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, and Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905
| | - J. H. van Zanten
- Department of Chemical Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, and Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905
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18
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Pham VQ, Rao N, Ober CK. Swelling and dissolution rate measurements of polymer thin films in supercritical carbon dioxide. J Supercrit Fluids 2004. [DOI: 10.1016/j.supflu.2003.12.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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19
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Kermis TW, Li D, Guney-Altay O, Park IH, van Zanten JH, McHugh MA. High-Pressure Dynamic Light Scattering of Poly(ethylene-co-1-butene) in Ethane, Propane, Butane, and Pentane at 130 °C and Kilobar Pressures. Macromolecules 2004. [DOI: 10.1021/ma0487103] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thomas W. Kermis
- Department of Chemical Engineering, Johns Hopkins University, Baltimore, Maryland 21218; Department of Chemical Engineering, Virginia Commonwealth University, Richmond, Virginia 23284; Department of Polymer Science & Engineering, Kumoh National University of Technology, Kyungbuk, Korea; and Chemical Engineering Department, North Carolina State University, Box 7905, Raleigh, North Carolina 27695-7905
| | - Dan Li
- Department of Chemical Engineering, Johns Hopkins University, Baltimore, Maryland 21218; Department of Chemical Engineering, Virginia Commonwealth University, Richmond, Virginia 23284; Department of Polymer Science & Engineering, Kumoh National University of Technology, Kyungbuk, Korea; and Chemical Engineering Department, North Carolina State University, Box 7905, Raleigh, North Carolina 27695-7905
| | - Ozge Guney-Altay
- Department of Chemical Engineering, Johns Hopkins University, Baltimore, Maryland 21218; Department of Chemical Engineering, Virginia Commonwealth University, Richmond, Virginia 23284; Department of Polymer Science & Engineering, Kumoh National University of Technology, Kyungbuk, Korea; and Chemical Engineering Department, North Carolina State University, Box 7905, Raleigh, North Carolina 27695-7905
| | - Il-Hyun Park
- Department of Chemical Engineering, Johns Hopkins University, Baltimore, Maryland 21218; Department of Chemical Engineering, Virginia Commonwealth University, Richmond, Virginia 23284; Department of Polymer Science & Engineering, Kumoh National University of Technology, Kyungbuk, Korea; and Chemical Engineering Department, North Carolina State University, Box 7905, Raleigh, North Carolina 27695-7905
| | - John H. van Zanten
- Department of Chemical Engineering, Johns Hopkins University, Baltimore, Maryland 21218; Department of Chemical Engineering, Virginia Commonwealth University, Richmond, Virginia 23284; Department of Polymer Science & Engineering, Kumoh National University of Technology, Kyungbuk, Korea; and Chemical Engineering Department, North Carolina State University, Box 7905, Raleigh, North Carolina 27695-7905
| | - Mark A. McHugh
- Department of Chemical Engineering, Johns Hopkins University, Baltimore, Maryland 21218; Department of Chemical Engineering, Virginia Commonwealth University, Richmond, Virginia 23284; Department of Polymer Science & Engineering, Kumoh National University of Technology, Kyungbuk, Korea; and Chemical Engineering Department, North Carolina State University, Box 7905, Raleigh, North Carolina 27695-7905
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20
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Rizzo A, Hättig C, Fernández B, Koch H. The effect of intermolecular interactions on the electric properties of helium and argon. III. Quantum statistical calculations of the dielectric second virial coefficients. J Chem Phys 2002. [DOI: 10.1063/1.1491402] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Ciddor PE. Refractive index of air: 3. The roles of CO2, H2O, and refractivity virials. APPLIED OPTICS 2002; 41:2292-2298. [PMID: 12003222 DOI: 10.1364/ao.41.002292] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The author's recent studies of the refractive index of air are extended, and several assumptions made therein are further examined. It is shown that the alternative dispersion equations for CO2, which are due to Edlen [Metrologia 2, 71 (1966)] and Old et al. [J. Opt. Soc. Am. 61, 89 (1971)] result in differences of less than 2 x 10(-9) in the phase refractive index and less than 3 x 10(-9) in the group refractive index for current and predicted concentrations of CO2. However, because the dispersion equation given by Old et al. is consistent with experimental data in the near infrared, it is preferable to the equation used by Edlen, which is valid only in the ultraviolet and the visible. The classical measurement by Barrell and Sears [Philos. Trans. R. Soc. London Ser. A 238, 1 (1939)] on the refractivity of moist air is shown to have some procedural errors in addition to the one discussed by Birch and Downs [Metrologia 30, 155 (1993)]. It is shown that for normal atmospheric conditions the higher refractivity virial coefficients related to the Lorentz-Lorenz relation are adequately incorporated into the empirically determined first refractivity virial. As a guide to users the practical limits to the calculation of the refractive index of the atmosphere that result from the uncertainties in the measurement of the various atmospheric parameters are summarized.
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Affiliation(s)
- Philip E Ciddor
- National Measurement Laboratory, Commonwealth Scientific and Industrial Research Organization, Lindfield, Australia.
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22
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BULANIN MO, BURTSEV AP, LADVISHCHENKO YUM, KERL K. Collision-induced vibrational polarizability and mixed second refractivity virial coefficientsBabR: an experimental study of the SF6—rare gas mixtures. Mol Phys 1999. [DOI: 10.1080/00268979909482925] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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23
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Koch H, Hättig C, Larsen H, Olsen J, Jo/rgensen P, Fernández B, Rizzo A. The effect of intermolecular interactions on the electric properties of helium and argon. II. The dielectric, refractivity, Kerr, and hyperpolarizability second virial coefficients. J Chem Phys 1999. [DOI: 10.1063/1.480362] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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24
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Fernández B, Hättig C, Koch H, Rizzo A. Ab initiocalculation of the frequency-dependent interaction induced hyperpolarizability of Ar2. J Chem Phys 1999. [DOI: 10.1063/1.477930] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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25
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Adjouri C, Balu N, Obriot J, Bose TK. Simultaneous measurement of dielectric constant and refractive index of SF6 and CO2 as a function of pressure. J Chem Phys 1997. [DOI: 10.1063/1.473781] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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26
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Hourri A, St-Arnaud JM, Bose TK. Dielectric and pressure virial coefficients of imperfect gases: CO2–SF6mixtures. J Chem Phys 1997. [DOI: 10.1063/1.473317] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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27
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Theoretical Modeling of Spectra and Collisional Processes of Weakly Interacting Complexes. ADVANCES IN QUANTUM CHEMISTRY 1997. [DOI: 10.1016/s0065-3276(08)60211-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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28
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Moszynski R, Heijmen TGA, Wormer PES, van der Avoird A. Ab initiocollision‐induced polarizability, polarized and depolarized Raman spectra, and second dielectric virial coefficient of the helium diatom. J Chem Phys 1996. [DOI: 10.1063/1.471416] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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29
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Moszynski R, Heijmen TG, Avoird AVD. Second dielectric virial coefficient of helium gas: quantum-statistical calculations from an ab initio interaction-induced polarizability. Chem Phys Lett 1995. [DOI: 10.1016/s0009-2614(95)01271-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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30
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31
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Li X, Hunt KLC. Transient changes in polarizability for centrosymmetric linear molecules interacting at long range: Theory and numerical results for H2...H2, H2...N2, and N2...N2. J Chem Phys 1994. [DOI: 10.1063/1.466834] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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32
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Spectral interpretation of the refractivity and dielectric virial coefficients of atomic gases. Chem Phys Lett 1994. [DOI: 10.1016/0009-2614(93)e1416-e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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33
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Hohm U. Frequency-dependence of second refractivity virial coefficients of small molecules between 325 nm and 633 nm. Mol Phys 1994. [DOI: 10.1080/00268979400100111] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Achtermann HJ, Hong JG, Magnus G, Aziz RA, Slaman MJ. Experimental determination of the refractivity virial coefficients of atomic gases. J Chem Phys 1993. [DOI: 10.1063/1.464212] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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