Lai K-F, Beyer M, Salumbides E J, Ubachs W
Department of Physics and Astronomy, LaserLaB, Vrije UniversiteitDe Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.
J Phys Chem A. 2021 Feb 11;125(5):1221-1228. doi: 10.1021/acs.jpca.0c11136. Epub 2021 Jan 27.
Rovibrational quantum states in the XΣ electronic ground state of H are prepared in the = 13 vibrational level up to its highest bound rotational level = 7, and in the highest bound vibrational level = 14 (for = 1) by two-photon photolysis of HS. These states are laser-excited in a subsequent two-photon scheme into FΣ outer well states, where the assignment of the highest (,) states is derived from a comparison of experimentally known levels in FΣ, combined with calculations of XΣ levels. The assignments are further verified by excitation of FΣ population into autoionizing continuum resonances, which are compared with multichannel quantum defect calculations. Precision spectroscopic measurements of the F-X intervals form a test for the calculations of ground state levels at high vibrational quantum numbers and large internuclear separations, for which agreement is found.
通过HS的双光子光解，在H的XΣ电子基态中制备振转量子态，使其处于v = 13振动能级直至其最高束缚转动能级J = 7，并处于最高束缚振动能级v = 14（对于J = 1）。这些态在随后的双光子方案中被激光激发到FΣ外阱态，其中最高（v，J）态的归属是通过比较FΣ中实验已知能级，并结合XΣ能级的计算得出的。通过将FΣ粒子激发到自电离连续共振态，与多通道量子亏损计算结果进行比较，进一步验证了这些归属。F - X间隔的精密光谱测量对高振动量子数和大核间距下基态能级的计算进行了检验，结果发现二者相符。
