Oscillator strengths and line widths of dipole-allowed transitions in (14)N2 between 86.0 and 89.7 nm.
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.
Heays
A N
AN
Research School of Physical Sciences and Engineering, The Australian National University, Canberra, Australian Capital Territory 0200, Australia. alan.heays@anu.edu.au
Lewis
B R
BR
Stark
G
G
Yoshino
K
K
Smith
Peter L
PL
Huber
K P
KP
Ito
K
K