Precise experimental test of models for the breakdown of the Born-Oppenheimer separation: The rotational spectra of isotopic variants of lithium hydride Export

@article{Bellini1995, abstract = {The frequencies of 22 rotational transitions in the four naturally occurring isotopic variants of lithium hydride have been measured to an unprecedented accuracy of a few parts in 10 8 with a tunable far-infrared spectrometer. The values of the vibrational and rotational quantum numbers v and J involved range up to 2 and 12; respectively. The measurements have been fitted with already existing data on the vibration-rotation energy levels of lithium hydride in its ground 1 Σ + state to a single model based on the Dunham expansion. This model has been modified to take into account the Dunham and nonadiabatic corrections and their effects on the reduced mass dependence of the energy levels in the way first described by Watson [J. Mol. Spectrosc. 80 ; 411 (1980)]. The data are fitted to experimental accuracy to give an improved set of reduced Dunham parameters; U k l ; and an improved value for the Born-Oppenheimer equilibrium bond length for LiH; r e BO =0.159 490 811(16) nm. The fit constitutes a stringent test of this type of model for the breakdown of the Born-Oppenheimer approximation.}, author = {Bellini, M. and De Natale, P. and Inguscio, M. and Varberg, Thomas D. and Brown, John M.}, citeulike-article-id = {6088580}, citeulike-linkout-0 = {http://dx.doi.org/10.1103/PhysRevA.52.1954}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRA/v52/i3/p1954_1}, citeulike-linkout-2 = {http://link.aps.org/pdf/PRA/v52/i3/p1954_1}, doi = {10.1103/PhysRevA.52.1954}, journal = {Physical Review A}, keywords = {hydride, lih, lithium, molecular, rotational, spectra, spectroscopy}, month = {Sep}, number = {3}, pages = {1954--1960}, posted-at = {2009-11-09 15:06:59}, priority = {2}, publisher = {American Physical Society}, title = {Precise experimental test of models for the breakdown of the Born-Oppenheimer separation: The rotational spectra of isotopic variants of lithium hydride}, url = {http://dx.doi.org/10.1103/PhysRevA.52.1954}, volume = {52}, year = {1995} }

TY - JOUR ID - Bellini1995 L3 - citeulike-article-id:6088580 N2 - The frequencies of 22 rotational transitions in the four naturally occurring isotopic variants of lithium hydride have been measured to an unprecedented accuracy of a few parts in 10 8 with a tunable far-infrared spectrometer. The values of the vibrational and rotational quantum numbers v and J involved range up to 2 and 12; respectively. The measurements have been fitted with already existing data on the vibration-rotation energy levels of lithium hydride in its ground 1 Σ + state to a single model based on the Dunham expansion. This model has been modified to take into account the Dunham and nonadiabatic corrections and their effects on the reduced mass dependence of the energy levels in the way first described by Watson [J. Mol. Spectrosc. 80 ; 411 (1980)]. The data are fitted to experimental accuracy to give an improved set of reduced Dunham parameters; U k l ; and an improved value for the Born-Oppenheimer equilibrium bond length for LiH; r e BO =0.159 490 811(16) nm. The fit constitutes a stringent test of this type of model for the breakdown of the Born-Oppenheimer approximation. IS - 3 JF - Physical Review A EP - 1960 TI - Precise experimental test of models for the breakdown of the Born-Oppenheimer separation: The rotational spectra of isotopic variants of lithium hydride PB - American Physical Society VL - 52 SP - 1954 KW - hydride KW - lih KW - lithium KW - molecular KW - rotational KW - spectra KW - spectroscopy AU - Bellini, M AU - De Natale, P AU - Inguscio, M AU - Varberg, Thomas AU - Brown, John PY - 1995/Sep// UR - http://dx.doi.org/10.1103/PhysRevA.52.1954 ER -