With this knowledge he was able to suggest that the green lines might be forbidden transitions.

All these forbidden transitions are such that one cannot hope to detect H2.

Forbidden transitions from metastable states are often called as satellite lines.

The symbol is used to indicate a forbidden transition.

An additional advantage is the fact that optically forbidden transitions may be observed as well.

This symmetry forbidden transition is believed to take place through a diradical intermediate.

In these systems the forbidden transitions can occur, but usually at slower rates than allowed transitions.

This high spin change causes these decays to be so-called forbidden transitions, and thus delayed.

Numerous bands including those due to dipole forbidden transitions are observed in the spectrum.

There are also other mechanisms for intensifying bands due to formally forbidden transitions, which we do not discuss here.

These are the so-called forbidden transitions.

However, there are other factors that influence the intensity of a spectral line, such as whether it is caused by an allowed or a forbidden transition.

Interaction between the two is quantum mechanically a "forbidden transition", i.e. possible with a very low probability.

Hyperfine forbidden transitions are observed when the magnetic field is not oriented along one of the principal axes.

Bowen was able to calculate the forbidden transitions of doubly ionized oxygen to be exactly where the lines had been found.

He proposed that the predictions of the classical theory regarding intensity, polarization and forbidden transitions are valid for all energies.

It is a straight line for allowed transitions and some forbidden transitions, in accord with the Fermi beta-decay theory.

Forbidden Transition of H3+.

The decay is slow because the transition from the excited to the lower state requires a spin flip, making it classically forbidden transition.

Since meta-stable states are rather common, forbidden transitions account for a significant percentage of the photons emitted by the ultra-low density gas in space.

The expression forbidden transitions is often used; this does not mean that these transitions cannot occur, only that they are electric-dipole-forbidden.

Because this is a classically forbidden transition, the triplet state has a long lifetime and the rate of phosphorescence is slow (10-2 to 100 sec).

At room temperature, O exists in a triplet state, which can only undergo a chemical reaction by making the forbidden transition into a singlet state.

More than 900 of the forbidden transitions provide necessary information on the spacing between the energy levels with different quantum numbers k, inaccessible from allowed transitions.

In the presence of different detunings, conditions are established under which the laser field induces sidebands at the frequency equal to that for the forbidden transition.