Mnr. Ashfold et al., CHARACTERIZATION OF THE (E)OVER-TILDE'(1)A'(1) RYDBERG STATE OF AMMONIA BY RESONANCE-ENHANCED MULTIPHOTON IONIZATION SPECTROSCOPY, Chemical physics letters, 260(1-2), 1996, pp. 27-33
Progression of bands associated with the nu(2) (bending) vibrational m
ode of the (E) over tilde'(1)A'(1) (4pa ''(2) <-- 3a(1)) Rydberg state
s of both NH3 and ND3 have been observed as two-photon resonances in t
he multiphoton ionisation spectrum of these two isotopomers at excitat
ion wavelengths in the range 275-248 nm. Band contour analysis yields
excited state spectroscopic parameters and some insight into the predi
ssociation behaviour of these levels, all of which show many parallels
with previous knowledge concerning the (C) over tilde'(1)A'(1) Rydber
g state of ammonia (arising from the corresponding 3pa ''(2) <-- 3a(1)
orbital promotion).