Rotational line strengths and self-pressure-broadening coefficients for the 1.27-μm, a1Δg–X3Σg-, v = 0–0 band of O2

Walter J. Lafferty; Alexander M. Solodov; Catherine L. Lugez; Gerald T. Fraser

doi:10.1364/AO.37.002264

Applied Optics
Vol. 37,
Issue 12,
pp. 2264-2270
(1998)
•https://doi.org/10.1364/AO.37.002264

Rotational line strengths and self-pressure-broadening coefficients for the 1.27-μm, a ¹Δ_g–X ³Σ_g ^-, v = 0–0 band of O₂

Walter J. Lafferty, Alexander M. Solodov, Catherine L. Lugez, and Gerald T. Fraser

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Walter J. Lafferty, Alexander M. Solodov, Catherine L. Lugez, and Gerald T. Fraser, "Rotational line strengths and self-pressure-broadening coefficients for the 1.27-μm, a¹Δ_g–X³Σ_g^-, v = 0–0 band of O₂," Appl. Opt. 37, 2264-2270 (1998)

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Abstract

We measured at 296 K the rotational line strengths and pressure-broadening coefficients for the 1.27-μm, a ¹Δ_g–X ³Σ_g ^-, v = 0–0 band of O₂ with a Fourier transform infrared spectrometer using an optical path length of 84 m, a spectral resolution of 0.01 cm^-1, and sample pressures between 13 and 104 kPa. The integrated band strength is 7.79(17) × 10^-6 m^-2 Pa^-1 [7.89(17) × 10^-5 cm^-2 atm^-1], and the Einstein A coefficient for spontaneous emission is 2.237(51) × 10^-4 s^-1, which corresponds to an upper-state 1/e lifetime of 1.24(3) h. The pressure-broadening coefficients decrease with increasing N and range from 19 to 38 MHz/kPa (FWHM). The mean value for the transitions studied is 30.3(21) MHz/kPa [0.1024(71) cm^-1/atm] (FWHM). The Einstein A coefficient determined here is in good agreement with the widely accepted value of 2.58 × 10^-4 s^-1 initially obtained by Badger et al. [J. Chem. Phys. 43, 4345 (1965)] more than 30 years ago. The standard uncertainties given above are one standard deviation.

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Transition	S _ij		S _v	Γ (FWHM)
Transition	10^-7 m^-2 Pa^-1	10^-6 cm^-2 atm^-1	10^-6 m^-2 Pa^-1	MHz kPa^-1	cm^-1 atm^-1
^s R(3)	0.966(9)	0.979(9) [1.362]	7.41(7)	32(2)	0.107(5)
^s R(9)	1.024(6)	1.037(7) [1.247]	7.79(5)	29(2)	0.099(5)
^s R(11)	0.87(1)	0.89(1) [1.049]	7.79(9)	30.9(7)	0.104(2)
^s R(13)	0.718(9)	0.727(9) [0.824]	8.0(1)	30.3(9)	0.103(3)
^s R(15)	0.518(8)	0.525(8) [0.606]	7.8(1)	29(2)	0.099(8)
^s R(17)	0.37(1)	0.37(1) [0.418]	8.0(3)	23(5)	0.08(2)
^s R(19)	0.219(7)	0.222(8) [0.271]	7.3(2)	25(3)	0.09(1)
^r R(1)	1.61(2)	1.63(2) [1.868]	7.80(9)	37.6(7)	0.127(3)
^r R(3)	1.86(1)	1.88(1) [2.177]	7.73(5)	32(1)	0.108(3)
^r R(7)	2.05(2)	2.08(2) [2.395]	7.74(6)	31(1)	0.105(4)
^r R(9)	1.90(1)	1.93(1) [2.213]	7.75(6)	31(1)	0.103(3)
^r R(11)	1.622(3)	1.644(3) [1.894]	7.70(1)	29.7(7)	0.100(2)
^r R(13)	1.31(1)	1.33(1) [1.508]	7.79(6)	29(2)	0.099(5)
^r R(15)	1.00(1)	1.01(1) [1.121]	7.97(8)	30(1)	0.102(5)
^r R(17)	0.669(8)	0.678(9) [0.780]	7.7(1)	26.6(9)	0.090(3)
^r Q(1)	0.43(1)	0.43(1) [0.629]	8.0(2)	39(3)	0.131(9)
^r Q(5)	1.351(9)	1.369(9) [1.720]	7.87(5)	32(1)	0.109(4)
^r Q(7)	1.50(1)	1.52(1) [1.880]	7.77(7)	32(1)	0.107(4)
^r Q(9)	1.469(9)	1.488(9) [1.828]	7.71(5)	30.0(5)	0.101(2)
^r Q(11)	1.29(1)	1.31(1) [1.618]	7.58(7)	32(1)	0.108(4)
^r Q(15)	0.834(5)	0.845(5) [0.999]	7.79(4)	25(1)	0.085(3)
^r Q(17)	0.577(5)	0.585(5) [0.705]	7.59(6)	26.8(9)	0.091(3)
^r Q(19)	0.400(1)	0.405(1) [0.465]	7.93(2)	29(3)	0.097(9)
^q R(17)	0.303(8)	0.307(8) [0.368]	7.2(2)	28(1)	0.096(4)
^q R(19)	0.178(6)	0.180(6) [0.243]	6.4(2)	19(1)	0.066(5)
^q Q(13)	2.42(8)	2.45(8) [2.373]	9.3(3)	29(1)	0.099(3)
^q Q(15)	1.55(2)	1.57(2) [1.824]	7.8(1)	29.4(2)	0.0994(8)
^q Q(17)	1.05(1)	1.07(1) [1.302]	7.38(8)	28(1)	0.095(4)
^q Q(21)	0.549(8)	0.556(8) [0.541]	9.3(1)	27(2)	0.090(6)
^q P(17)	0.2(1)	0.2(1) [0.293]	7(5)	24(5)	0.08(2)
^p Q(7)	1.17(1)	1.19(1) [0.241]	7.75(7)	32(1)	0.107(4)
^p Q(9)	1.22(1)	1.24(1) [1.334]	7.75(9)	31(1)	0.105(4)
^p Q(11)	1.15(2)	1.17(2) [1.258]	7.9(1)	31.5(1)	0.1064(4)
^p Q(13)	0.973(8)	0.986(8) [1.072]	7.93(7)	30(2)	0.103(6)
^p Q(15)	0.754(8)	0.764(8) [0.839]	7.93(9)	29.0(9)	0.098(3)
^p Q(17)	0.543(8)	0.551(8) [0.607]	8.0(1)	30(2)	0.100(6)
^p Q(19)	0.395(5)	0.400(6) [0.409]	8.6(1)	26.7(2)	0.0901(8)
^p Q(21)	0.23(1)	0.23(1) [0.257]	8.0(4)	33(2)	0.112(8)
^p Q(23)	0.139(6)	0.141(6) [0.152]	8.3(3)
^p P(5)	0.514(5)	0.521(6) [0.618]	7.60(8)	31.3(9)	0.106(3)
^p P(7)	0.76(1)	0.77(1) [0.922]	7.5(1)	28(4)	0.09(1)
^p P(9)	0.900(8)	0.912(8) [1.058]	7.82(7)	32.3(7)	0.109(3)
^p P(11)	0.881(5)	0.893(6) [1.039]	7.82(5)	31(2)	0.106(5)
^p P(13)	0.762(5)	0.773(6) [0.911]	7.73(5)	29.5(7)	0.099(2)
^p P(15)	0.60(1)	0.61(1) [0.727]	7.6(1)	27(3)	0.092(9)
^p P(19)	0.301(8)	0.305(8) [0.365]	7.7(2)	29(2)	0.098(5)
^p P(21)	0.209(9)	0.212(9) [0.232]	8.4(3)	28(1)	0.093(4)
^o P(5)	0.16(1)	0.16(1) [0.174]	7.2(6)
^o P(7)	0.32(8)	0.33(1) [0.336]	7.9(3)	31(3)	0.11(1)
^o P(9)	0.38(1)	0.38(1) [0.426]	7.6(2)	31(2)	0.104(8)
^o P(11)	0.373(5)	0.378(6) [0.442]	7.3(1)	28.4(9)	0.096(3)
^o P(13)	0.354(8)	0.359(8) [0.402]	7.8(2)	28(4)	0.09(1)

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Applied Optics