Search

The β(6,0) (B [sup 2]Π[sub r]–X [sup 2]Π[sub r]) and γ(3,0) (A [sup 2]Σ[sup +]–X [sup 2]Π[sub r]) bands of NO have been recorded using a vacuum ultraviolet Fourier transform spectrometer with synchrotron radiation as light source. The analysis of the β(6,0) and γ(3,0) bands of NO provides accurate rotational line positions and term values. Molecular constants of the v=6 level of the B [sup 2]Π[sub r] and v=3 level of the A [sup 2]Σ[sup +] have been determined. Accurate rotational line strengths have also been obtained. The band oscillator strength of the β(6,0) and γ(3,0) bands are determined to be 0.48×10[sup -4] and 2.69×10[sup -4], respectively. © 2002 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Fourier transform spectroscopic measurements of the absorption bands of the Herzberg III (A[sup ′] [sup 3]Δ[sub u]-X [sup 3]Σ[sub g][sup -]) of O[sub 2] at 295 K have been made with a resolution of 0.06 cm[sup -1] in the wavelength region 240 to 275 nm. Rotational line positions are determined with an accuracy of 0.005 cm[sup -1], and rotational term values are presented for the vibrational levels, v[sup ′]=4-11. Precise band oscillator strengths of the (4,0)-(11,0) bands are obtained for the first time by direct measurement by summing the cross sections of individual rotational lines of the bands. The rotational line strengths and the branching ratios are also presented for the same bands. The continuity relationship for the band oscillator strengths to photodissociation continuum cross sections has been applied to the three-band systems. © 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Line-by-line photoabsorption cross-sections of the NO δ(1,0) band were measured with the VUV Fourier transform spectrometer from Imperial College, London, using synchrotron radiation at Photon Factory, KEK, Japan, as a continuum light source. The analysis of the NO δ(1,0) band provides accurate rotational line positions and term values as well as the photoabsorption cross-sections. The molecular constants of the C(1) [sup 2]Π level are found to be T[sub 0]=54 690.155±0.03 cm[sup -1], B[sub v]=1.944 06±0.000 62 cm[sup -1], D[sub v]=(5.91±0.42)x10[sup -5] cm[sup -1], A[sub D]=-0.0187±0.0050 cm[sup -1], p=-0.0189±0.0037 cm[sup -1], and q=-0.015 21±0.000 20 cm[sup -1]. The sum of the line strengths for all rotational transitions of the NO δ(1,0) band is determined as 4.80x10[sup -15] cm[sup 2] cm[sup -1], corresponding to a band oscillator strength of 0.0054±0.0003. © 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]