| A study of NH/D-Ne and CH-Ne was undertaken to investigate the structure of these complexes and test the ability of high-level theoretical methods to predict their properties.; The c1pi-a 1Delta and A3pi-X 3Sigma- transitions of NH/D-Ne were characterized using laser induced fluorescence measurements. Spectra recorded in the vicinity of the monomer show groups of complex features associated with the monomer P(2), Q(2), R(2) lines for the c1pi- a1Delta transition and P31(1), Q 21(1), R1(1) lines for the A3pi- X3Sigma- transition respectively. Results from theoretical calculations were used to guide the interpretation of the spectra. Potential energy surfaces, calculated using ab initio methods, were used to predict the ro-vibronic structure of the c-a and A-X system. Calculated vibronic energy level patterns could be recognized in the spectra but there were quantitative discrepancies. These errors were attributed to incomplete recovery of the dynamical correlation energy.; The NH-He van der Waals complex was characterized via laser excitation of bands associated with the NH A3pi- X3Sigma- transition. It was demonstrated that the ground state supports a bound level with a rotational constant of B″ = 0.334(2) cm -1. These results are in agreement with the predictions of recent high-level theoretical calculations. Spin-orbit predissociation of the excited complex was observed, and the spectra yield insights regarding the NH(A)+He potential energy surfaces.; The fluorescence depletion spectra of the CH(A 3pi-X3Sigma-) transition were simulated using the ab initio potential energy surfaces. The correlation between the simulated spectra was sufficient for assignment of the latter. Adjustment of the A state average potential was made to obtain a surface that reproduces the vibrational energy spacing, positions of some bending states and dissociation energy of CH-Ne. |
