. 2025 Jun 25;125(14):6609–6652. doi: 10.1021/acs.chemrev.4c01014

4. Characteristic Semiclassical Langevin Energy E ^* and Length R ^* Scales of the s-Wave Regime in ¹³⁸Ba⁺ Ion-Neutral Rovibronic Ground-State Molecule Collisions, with Ion–Atom Collisions for Reference .

Molecule	R^* [10^–6 m]	E^* [nK]
LiCs	25.9	0.00521
NaCs	40.1	0.00206
LiRb	16.2	0.0165
LiK	10.0	0.0703
NaRb	23.6	0.00711
NaK	14.2	0.0281
KCs	22.2	0.00644
RbCs	21.6	0.00614
KRb	6.21	0.0952
LiNa	1.12	7.86
Rb	0.295	52.3
Li	0.0694	8760.

For all systems considered, the characteristic energy falls in the ultracold regime. Reproduced with permission from ref by Karpa and Dulieu. CC BY 2025 arXiv.

4. Characteristic Semiclassical Langevin Energy E * and Length R * Scales of the s-Wave Regime in 138Ba+ Ion-Neutral Rovibronic Ground-State Molecule Collisions, with Ion–Atom Collisions for Reference .

4. Characteristic Semiclassical Langevin Energy E ^* and Length R ^* Scales of the s-Wave Regime in ¹³⁸Ba⁺ Ion-Neutral Rovibronic Ground-State Molecule Collisions, with Ion–Atom Collisions for Reference .