15min:

DANIEL F HULLAH, DAMIAN M GOODRIDGE, RICHARD F BARROW AND JOHN M BROWN, The Physical and Theoretical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ UK.

FeH, produced by reaction of FeCO₅ with H atoms, has been studied by selective laser-induced fluorescence following excitation of single rotational levels of individual spin-orbit components of v=0 of e⁶. As well as lines of known transitions including e⁶-a⁶, a number of transitions to a new lower state have been recognized. This state lies at about 0.5 eV above the ground state; rotational structure, recorded at high resolution, shows strong R and P branches and very weak Q lines. The apparent value of the rotational constant, B, is very small, ~ 3.5 cm^-1, not much more than half of the expected, unperturbed value.

.25in

References

D. M. Goodridge, D. F. Hullah and J. M. Brown, J. Chem. Phys., 108, 428-435 (1998).

D. M. Goodridge, R. T. Carter, T. C. Steimle and J. M. Brown, J. Chem. Phys., 106, 4823-4831 (1997).