3n state

Figure 4. Schematic of the potential energy curves of the relevant electronic states The pump pulse prepares a coherent superposition of vibrational states in the electronic A 1 EJ state at the inner turning point. Around v = 13 this state is spin-orbit coupled with the dark b 3n state, causing perturbations. A two-photon probe process transfers the wavepacket motion into the ionization continuum via the (2) llg state [7].

Fig. V-14. Potential energy curves of Oj. S-R, Schumann-Runge bands H, Herzberg bands A-A, atmospheric bands. The line-broadening was observed at r = 4 of the fl3 state at which point the repulsive 3n. state crosses the B5I state. See Murrell and Taylor (726). From Dissociation Energies and the Spectra of Diatomic Molecules" by Caydon, 3rd Ed. 1968, p. 74, reprinted by permission of Associated Book Publishers Ltd.

In the vacuum ultraviolet SO(B3Z, A 3n) states are formed below incident wavelength 1318 A [Okabe (768)], indicating primary processes... 

Figure 25. A plot of the Ct fluorescence signal vs. 1/Ip. The slope of this plot gives the total quenching rate for the n, state while the intercept is used to evaluate the 3n state number density. C, — 4.5 X 1013 cm 3 Q = 1.2 X l 12 sec 1 (21).

There is a first-order splitting pattern common to all 3n states, independent of the physical content. All the molecule-dependent physical information is contained in the parameter Aso- These facts are, of course a consequence of the tensor properties expressed in the Wigner-Eckart theorem. 

Figure 9.31. FIR laser magnetic resonance spectrum of CO in the a 3n state, observed using the 393.6 pm line from formic acid [62]. This spectrum arises from the J = 7 — 6 rotational transition in the Q = 2 fine-structure state, and the transitions obey the selection rule A Mj = +1. The lower Mj states are indicated in the diagram.

Figure 10.78. Lower rotational levels of the three fine-structure components of the a 3n state of CO, and the observed rotational and yl-doublet transitions. The /I-doublet splittings are exaggerated for the sake of clarity.

The effective Hamiltonian for case (a) 3n states was described by Brown and Merer [233]. The effective rotational Hamiltonian (excluding the /I-doubling terms) was given, in a molecule-fixed axis system, as... 

At the beginning of this section we noted the fact that the b 3n state is one of a manifold of close-lying excited states. The spin orbit interaction mixes singlet and triplet states and ab initio calculations result in the following wave ftmctions for the fine structure components of the h 3 n state ... 

Figure 2. (a) Radial coupling matrix elements between 3 + and 3A states of the S3+(3s23p)+H collision system (see labels in Figure la), (b) Radial coupling between 3n states of the S3+(3s23p) + H collision system (see labels in Figure lb). 

These measurements can also be explained by assuming a single crossing between the a3E and 3n states. Fig. 7a gives the correlation diagram of the u-states emerging from K(42P) + K(42S). The relative order of the states at large distances is taken from Ref. 110, at small distances from Ref. 71. At... 

If one assumes that the orbitals in common for the [Pg.189]

However, since 7 -C A, this choice is immaterial for A / 0 states of all molecules except perhaps H2. For a 3n state of H2, Jette and Miller (1974) used the fact... 

Before concluding this section it will be useful to discuss two examples of the Van Vleck transformation centrifugal distortion in a 3n state and A-doubling in a 2n state. 

For many years, the ground state of the C2 molecule had been assumed to be a 3n state, in part because the relative energies of the manifolds of singlet and triplet states were unknown. The discovery of perturbations between the X E+ and b3E states (Ballik and Ramsay, 1963) allowed the relative energies of singlet and triplet states to be determined. 

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