Oscillator strengths and line widths of dipole-allowed transitions in (14)N2 between 86.0 and 89.7 nm.
نویسندگان
چکیده
Oscillator strengths of 23 electric-dipole-allowed bands of (14)N(2) in the 86.0-89.7 nm (111,480-116,280 cm(-1)) region are reported from synchrotron-based photoabsorption measurements at an instrumental resolution of 6.5x10(-4) nm (0.7 cm(-1)) full width at half maximum. The absorption spectrum comprises transitions to vibrational levels of the c(n) (1)Pi(u) (n=3,4), o(3) (1)Pi(u), and c(n+1)(') (1)Sigma(u)(+)(n=3,4) Rydberg states as well as the b (1)Pi(u) and b(') (1)Sigma(u)(+) valence states. The J dependences of band f-values derived from the experimental line f-values are reported as polynomials in J(J+1) and are extrapolated to zero nuclear rotation in order to facilitate comparisons with the results of coupled Schrodinger equation calculations. Many bands in this study are characterized by a strong J dependence of the band f-values and display anomalous P-, Q-, and R-branch intensity patterns. Predissociation line widths are reported for six bands. The experimental f-value and line-width patterns inform current efforts to develop comprehensive spectroscopic models for N(2) that incorporate rotational effects and predissociation mechanisms, and are critical for the construction of realistic atmospheric radiative-transfer models.
منابع مشابه
Oscillator strengths and line widths of dipole-allowed transitions in (14)N(2) between 89.7 and 93.5 nm.
Line oscillator strengths in the 20 electric dipole-allowed bands of (14)N(2) in the 89.7-93.5 nm (111480-106950 cm(-1)) region are reported from photoabsorption measurements at an instrumental resolution of approximately 6 mA (0.7 cm(-1)) full width at half maximum. The absorption spectrum comprises transitions to vibrational levels of the 3p sigma(u) c(4)' (1)Sigma(u)(+), 3p pi(u) c(3) (1)Pi(...
متن کاملOscillator strengths and line widths of dipole - allowed transitions in N 14 2 between 86 . 0 and 89 . 7 nm
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Oscillator strength and linewidth measurements of dipole - allowed transitions in 14 N 2 between 93 . 5 and 99
Line oscillator strengths in 16 electric dipole-allowed bands of N2 in the 93.5–99.5 nm 106 950−100 500 cm−1 region have been measured at an instrumental resolution of 6.5 10−4 nm 0.7 cm−1 . The transitions terminate on vibrational levels of the 3p 1 u , 3p 1 u, and 3s 1 u Rydberg states and of the b 1 u + and b 1 u valence states. The J dependences of band f values derived from the experimenta...
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Single-valence electron atoms are an important class of atoms. Their oscillator strengths are their important properties. Knowing the oscillator strengths one can easity calculate the transition probabilities of the spectral lines and hence the lifetimes of energy levels of most atoms. The oscillator strengths of the spectral lines of most atoms are not knoen with sufficient accuracy due to t...
متن کاملOscillator strength and linewidth measurements of dipole-allowed transitions in 14N2 between 93.5 and 99.5 nm.
Line oscillator strengths in 16 electric dipole-allowed bands of 14N2 in the 93.5-99.5 nm (106,950-100,500 cm(-1)) region have been measured at an instrumental resolution of 6.5 x 10(-4) nm (0.7 cm(-1)). The transitions terminate on vibrational levels of the 3psigma 1Sigma u (+), 3ppi 1Pi u, and 3ssigma 1Pi u Rydberg states and of the b' 1Sigma u (+) and b 1Pi u valence states. The J dependence...
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ورودعنوان ژورنال:
- The Journal of chemical physics
دوره 131 19 شماره
صفحات -
تاریخ انتشار 2009