TY - JOUR
T1 - Quantum-interference effects in the o(1)Pi(u)(v=1)similar to b(1)Pi(u)(v=9) Rydberg-valence complex of molecular nitrogen
AU - Vieitez, M.O.
AU - Ivanov, T.I.
AU - Sprengers, J.P.
AU - de Langey, C.A.
AU - Ubachs, W.M.G.
AU - Lewis, B.R.
AU - Stark, G.
PY - 2007
Y1 - 2007
N2 - Two distinct high-resolution experimental techniques, 1 [image omitted] UV laser-based ionization spectroscopy and synchrotron-based XUV photoabsorption spectroscopy, have been used to study the o[image omitted] Rydberg-valence complex of 14N2, providing new and detailed information on the perturbed rotational structures, oscillator strengths, and predissociation linewidths. Ionization spectra probing the b[image omitted] state of 14N2, which crosses o1u(v=1) between J = 24 and J = 25, and the o1u(v=1), b,1u(v=9), and b[image omitted] states of 14N15N, have also been recorded. In the case of 14N2, rotational and deperturbation analyses correct previous misassignments for the low-J levels of o(v=1) and b(v=9). In addition, a two-level quantum-mechanical interference effect has been found between the o-X(1, 0) and b-X(9, 0) transition amplitudes which is totally destructive for the lower-energy levels just above the level crossing, making it impossible to observe transitions to b(v=9,J=6). A similar interference effect is found to affect the o(v=1) and b(v=9) predissociation linewidths, but, in this case, a small non-interfering component of the b(v=9) linewidth is indicated, attributed to an additional spin-orbit predissociation by the repulsive [image omitted] state.
AB - Two distinct high-resolution experimental techniques, 1 [image omitted] UV laser-based ionization spectroscopy and synchrotron-based XUV photoabsorption spectroscopy, have been used to study the o[image omitted] Rydberg-valence complex of 14N2, providing new and detailed information on the perturbed rotational structures, oscillator strengths, and predissociation linewidths. Ionization spectra probing the b[image omitted] state of 14N2, which crosses o1u(v=1) between J = 24 and J = 25, and the o1u(v=1), b,1u(v=9), and b[image omitted] states of 14N15N, have also been recorded. In the case of 14N2, rotational and deperturbation analyses correct previous misassignments for the low-J levels of o(v=1) and b(v=9). In addition, a two-level quantum-mechanical interference effect has been found between the o-X(1, 0) and b-X(9, 0) transition amplitudes which is totally destructive for the lower-energy levels just above the level crossing, making it impossible to observe transitions to b(v=9,J=6). A similar interference effect is found to affect the o(v=1) and b(v=9) predissociation linewidths, but, in this case, a small non-interfering component of the b(v=9) linewidth is indicated, attributed to an additional spin-orbit predissociation by the repulsive [image omitted] state.
U2 - 10.1080/00268970701291750
DO - 10.1080/00268970701291750
M3 - Article
SN - 0026-8976
VL - 105
SP - 1543
EP - 1557
JO - Molecular Physics
JF - Molecular Physics
IS - 11-12
ER -