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Fraser, P.A.; Jarmain, W.R.; Nicholls, R.W., Vibrational transition probabilities of diatomic molecules; collected results II, N₂⁺, CN, C₂, O₂, TiO, Astrophys. J., 1954, 119, 286. [all data]

Nicholls, R.W., The interpretation of intensity distributions in the CN violet, C₂ Swan, OH violet and O₂ Schumann-Runge band systems by use of their r-Centroids and Franck-Condon factors, Proc. Phys. Soc. London Sect. A, 1956, 69, 741. [all data]

Nicholls, R.W.; Fraser, P.A.; Jarmain, W.R., Transition probability parameters of molecular spectra arising from combustion processes, Combust. Flame, 1959, 3, 13. [all data]

Nicholls, R.W., The Franck-Condon factor (q_v'v") array to high vibrational quantum numbers for the O₂(B³Σ_u^- - X³Σ_g⁺) Schumann-Runge band system, Can. J. Phys., 1960, 38, 1705. [all data]

Nicholls, R.W.; Fraser, P.A.; Jarmain, W.R.; McEachran, R.P., Vibrational transition probabilities of diatomic molecules: collected results. IV. BeO, BO, CH⁺, CO, NO, SH, O₂, O₂⁺, Astrophys. J., 1960, 131, 399. [all data]

Robinson, D.; Nicholls, R.W., Intensity measurements on the CO⁺ comet tail, and the BO α and β molecular band systems, Proc. Phys. Soc. London, 1960, 75, 817. [all data]

Herman, L.; Ferguson, H.I.S.; Nicholls, R.W., Excitation of the first negative system of O₂⁺ by a proton beam in air and oxygen, Can. J. Phys., 1961, 39, 476. [all data]

Nicholls, R.W., Franck-Condon factors and r-centroids to high vibrational quantum numbers for three band systems of CO⁺ and absolute band strengths for the comet-tail system, Can. J. Phys., 1962, 40, 1772. [all data]

Nicholls, R.W., Franck-Condon factors to high vibrational quantum numbers II: SiO, MgO, SrO, AlO, VO, NO, J. Res. Nat. Bur. Stand. Sect. A, 1962, 66, 227. [all data]

Nicholls, R.W., Einstein A coefficients, oscillator strengths and absolute band strengths for the N₂ second positive and N₂⁺ first negative systems, J. Atmos. Terr. Phys., 1963, 25, 218. [all data]

Nicholls, R.W.; Parkinson, W.H.; Reeves, E.M., The spectroscopy of shock-excited powdered solids, Appl. Opt., 1963, 2, 919. [all data]

Jarmain, W.R.; Nicholls, R.W., A theoretical study of the O₂X³Σ_g^- - B³Σ_u^- photodissociation continuum, Proc. Phys. Soc. London, 1964, 84, 417. [all data]

Tyte, D.C.; Nicholls, R.W., Identification atlas of molecular spectra. 2. The N₂ C³Π_u-B³Π_g second positive system, Pub. The University of Western Ontario, Department of Physics, Molecular Excitation Group, London, Ontario, 1964, 0. [all data]

Tyte, D.C.; Nicholls, R.W., Identification atlas of molecular spectra. 1. The AlO A²Σ-X²Σ blue-green system, Pub. University of Western Ontario, Department of Physics, Molecular Excitation Group, London, Ontario, 1964, 1. [all data]

Mentall, J.E.; Nicholls, R.W., Absolute band strengths for the C₂ Swan system, Proc. Phys. Soc. London, 1965, 86, 873. [all data]

Tyte, D.C.; Nicholls, R.W., Identification atlas of molecular spectra. 3. The N₂⁺B²Σ_u⁺-X²Σ_g⁺ first negative system of nitrogen, Pub. The University of Western Ontario, Department of Physics, Molecular Excitation Group, London, Ontario, 1965, 0. [all data]

Degen, V.; Nicholls, R.W., Intensity measurement in the laboratory on the 0₂ Herzberg I(A³Σ_u⁺- X³Σ_g^-), J. Geophys. Res., 1966, 71, 3781. [all data]

McEwen, D.J.; Nicholls, R.W., Intensity distribution of the Lyman-Birge-Hopfield band system of N₂, Nature (London), 1966, 209, 902. [all data]

Drake, G.W.F.; Tyte, D.C.; Nicholls, R.W., A study of emissivities and transition probabilities of diatomic molecules in optically thick hot gases with applications to the B¹Σ-X¹Σ transition of BeO, J. Quant. Spectrosc. Radiat. Transfer, 1967, 7, 639. [all data]

Hebert, G.R.; Innanen, S.H.; Nicholls, R.W., Identification atlas of molecular spectra., York University, Centre for Research in Experimental Space Science and Department of Physics, Toronto, Ontario, 1967, 0. [all data]

Jarmain, W.R.; Nicholls, R.W., A theoretical study of the v"=0, 1, 2 progressions of bands and adjoining photodissociation continua of the O₂ Herzberg I system, Proc. Phys. Soc. London, 1967, 90, 545. [all data]

Nicholls, R.W.; Tyte, D.C., Franck-Condon factors and r centroids for band systems of ZrO, Proc. Phys. Soc. London, 1967, 91, 489. [all data]

Tyte, D.C.; Innanen, S.H.; Nicholls, R.W., Identification atlas of molecular spectra., York University, Centre for Research in Experimental Space Science and Department of Physics, Toronto, Ontario, 1967, 0. [all data]

Degen, V.; Innanen, S.H.; Hebert, G.R.; Nicholls, R.W., Identification atlas of molecular spectra. 6. The O₂A³Σ_u⁺ - X³Σ_g^- Herzberg I system, York University, Centre fro REsearch in Experimental Space Science and Department of Physics, Toronto, Ontario, 1968, 1. [all data]

Degen, V.; Nicholls, R.W., The oxygen-argon afterglow as a source of the O₂(A³Σ_u⁺-X³Σ_g^-) Herzberg I band system, J. Phys. B:, 1968, 1, 983. [all data]

Nicholls, R.W., Franck-Condon factors for ionizing transitions of O₂, CO, NO and H₂ and for the NO⁺(A¹-Σx¹Σ) band system, J. Phys. B:, 1968, 1, 1192. [all data]

Degen, V.; Nicholls, R.W., Intensity measurements on the A³Σ_u⁺-X³Σ_g^- Herzberg I band system of O₂, J. Phys. B:, 1969, 2, 1240. [all data]

Hebert, G.R.; Nicholls, R.W., Franck-Condon factors for the v'=0 progression of the N₂ fourth positive band system, J. Phys. B:, 1969, 2, 626. [all data]

Linton, C.; Nicholls, R.W., Relative band strengths for the AlO blue-green system, J. Quant. Spectrosc. Radiat. Transfer, 1969, 9, 1. [all data]

Linton, C.; Nicholls, R.W., Band spectra of the singlet systems of the TiO molecule, J. Phys. B:, 1969, 2, 490. [all data]

Harrington, J.A.; Seel, R.M.; Hebert, G.R.; Nicholls, R.W., Identification atlas of molecular spectra. 7. The VO C⁴Σ^- - X⁴Σ^- yellow-green and B⁴Π - X⁴Σ^- red systems, York University, Centre for Research in Experimental Space Science, Toronto, Ontario, 1970, 0. [all data]

Hasson, V.; Hebert, G.R.; Nicholls, R.W., Measured transition probabilities for bands of the Schumann-Runge (B³Σ_u^--X³Σ_g^-) band system of molecular oxygen, J. Phys. B:, 1970, 3, 1188. [all data]

Linton, C.; Nicholls, R.W., Measurement of intensities of the α and β band systems of TiO, J. Quant. Spectrosc. Radiat. Transfer, 1970, 10, 311. [all data]

Brocklehurst, B.; Hebert, G.R.; Innanen, S.H.; Seel, R.M.; Nicholls, R.W., Identification atlas of molecular spectra. 8. The CN A²Π - X²Σ⁺ red system, Pub. York University, Centre for Research in Experimental Space Science, Toronto, Ontario, 1971, 0. [all data]

Hasson, V.; Nicholls, R.W., Absolute spectral absorption measurements of the NO-β(B²Π-X²Π) band system of nitric oxide, J. Phys. B:, 1971, 4, 1769. [all data]

Hasson, V.; Nicholls, R.W., Absolute spectral absorption measurements on molecular oxygen from 2640-1920 Å: I. Herzberg I (A³Σ_u⁺-X³Σ_g^-) bands (2640-2430 Å), J. Phys. B:, 1971, 4, 1778. [all data]

Hasson, V.; Nicholls, R.W., Absolute spectral absorption measurements on molecular oxygen from 2640-1920 Å: II. Continuum measurements 2430-1920 Å, J. Phys. B:, 1971, 4, 1789. [all data]

Hasson, V.; Nicholls, R.W., Absolute absorption oscillator strength measurements on the (a³Π-X¹Σ) Cameron band system of CO, J. Phys. B:, 1971, 4, 681. [all data]

Arnold, J.O.; Nicholls, R.W., A shock tube determination of the electronic transition moment of the CN red band system, J. Quant. Spectrosc. Radiat. Transfer, 1972, 12, 1435. [all data]

Brocklehurst, B.; Hebert, G.R.; Innanen, S.H.; Seel, R.M.; Nicholls, R.W., Identification atlas of molecular spectra. 9. The CN B²Σ⁺ - X²Σ⁺ violet system, York University, Centre for Research in Experimental Space Science, Toronto, Ontario, 1972, 0. [all data]

Farmer, A.J.D.; Hasson, V.; Nicholls, R.W., Absolute oscillator strength measurements of the (v" = 0, v' = 0-3) bands of the (A²Σ-X²Π) γ-system of nitric oxide, J. Quant. Spectrosc. Radiat. Transfer, 1972, 12, 627. [all data]

Farmer, A.J.D.; Hasson, V.; Nicholls, R.W., Absolute oscillator strength estimates for some bands of the β-system of nitric oxide, J. Quant. Spectrosc. Radiat. Transfer, 1972, 12, 635. [all data]

Hasson, V.; Farmer, A.J.D.; Nicholls, R.W.; Anketell, J., Application of dispersion techniques to molecular band intensity measurements. II. Oscillator strength of the (0,0) band of NO-γ(A²Σ-x²Π) system, J. Phys. B:, 1972, 5, 1248. [all data]

Arnold, J.O.; Nicholls, R.W., A shock tube determination of the CN ground state dissociation energy and the CN violet electronic transition moment, J. Quant. Spectrosc. Radiat. Transfer, 1973, 13, 115. [all data]

Danylewych, L.L.; Nicholls, R.W., Intensity measurements on the C₂ (d³Π_g-a³Π_u) Swan band system. I. Intercept and partial band methods, Proc. R. Soc. London A, 1974, 339, 197-212. [all data]

Danylewych, L.L.; Nicholls, R.W., Intensity measurements on the C₂ (d³Π_g-a³Π_u) Swan band system. II. Interpretation of band intensity measurements from synthetic spectra, Proc. R. Soc. London A, 1974, 339, 213. [all data]

Cooper, D.M.; Nicholls, R.W., Measurments of the electronic transition moments of C₂-band systems, J. Quant. Spectrosc. Radiat. Transfer, 1975, 15, 139. [all data]

Creek, D.M.; Nicholls, R.W., A comprehensive re-analysis of the O₂(B³Σ_u^- - X³Σ_g^-) Schumann-Runge band system, Proc. R. Soc. London A, 1975, 341, 517. [all data]

Cooper, D.M.; Nicholls, R.W., Transition probability data for seven band systems of C₂, Spectrosc. Lett., 1976, 9, 139-155. [all data]

Langhoff, S.R.; Dix, J.P.; Arnold, J.O.; Nicholls, R.W.; Danylewych, L.L., Theoretical intensity parameters for the vibration-rotation bands of ClO, J. Chem. Phys., 1977, 67, 4306-4308. [all data]

Mandelman, M.; Nicholls, R.W., The absorption cross sections and f-values for the v" = 0 progression of bands and associated continuum for the ClO(A²Π_i ← X²Π_i) system, J. Quant. Spectrosc. Radiat. Transfer, 1977, 17, 483-491. [all data]

Danylewych, L.L.; Nicholls, R.W., Intensity measurements and transition probabilities for bands of the CN violet (B²Σ-X²Σ) band system, Proc. R. Soc. London A, 1978, 360, 557-573. [all data]

Freedman, R.; Nicholls, R.W., Molecular constants for the v" = 0 (X²Π) and v' = 0, 1 (A²Σ⁺) levels of the NO molecule and its isotopes, J. Mol. Spectrosc., 1980, 83, 223-227. [all data]

Cann, M.W.P.; Nicholls, R.W., Spectral line parameters for the O₂ Herzberg I band system, Can. J. Phys., 1991, 69, 1163-1165. [all data]

Nicholls, R.W., J. Chem. Phys., 1956, 24, 1104. [all data]

Cann, M.W.P.; Nicholls, R.W.; Roney, P.L.; Blanchard, A.; Findlay, F.D., Spectral line shapes for carbon dioxide in the 4.3-μm band, Appl. Opt., 1985, 24, 1374. [all data]