NaK bound–free and bound–bound 4 3Σ+→a 3Σ+ emission

Observation and modelling of bound-free transitions to the $X^1Σ^+$ and $a^3Σ^+$ states of KCs

“…In 14 the repulsive part of a 3 Σ + state of NaK was revisited using bound-free c 3 Σ + → a 3 Σ + transitions. Later the authors of 15 applied the bound-free part of (4) 3 Σ → a 3 Σ + emission in NaK to obtain the improved transition dipole moment functions. In a homonuclear alkali dimer Cs 2 LIF to the short-range repulsive part of the a 3 Σ + u state was observed 16 .…”

Non-Resonant Pump-Probe Multiphoton Ionization and Strong Quantum Level Dependence of the Radiative Lifetime of Sodium Dimer Shelf States

“…Similarly, for the molecular peaks the fast decay time is in the range of 50 to 90 ns while the slow decay time is in the range of 4130 to 5330 ns. According to the atomic lifetime data for Rydberg states available from the literature, [12][13][14] the 7s Rydberg state of Na has a lifetime of about 500 ns, the 8p state a lifetime of around 6800 ns, a reasonable match with the atomic peak result. Next, consider the case of UV pump and delayed green probe case, from the best fit procedure data shown in table 5.2 for Na + the fast decay times are found to be in the range of 10 -30 ns and slow decay times in the range of 210 -260 ns.…”

“…This is a method developed by Rydberg, Klein, and Rees for determining the classical turning points of a vibrational energy level. 13 The classical turning points, R-and R+ are obtained from experimental spectroscopic constants. Purely theoretical approaches such as the ab initio method and a variety of other theoretical techniques have also been applied to obtain potential curves.…”

“…While the lifetime information about atomic Rydberg states are well known from several experimental and theoretical studies. [12][13][14] Based on the quantum numbers (n,l,m), the lifetimes of the atomic sodium Rydberg states can vary from a fraction of microsecond to hundreds of microseconds. These Rydberg states are electronic resonances that may be regarded as the electronic analog to transition states in molecular dynamics.…”