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Table 3 Partial list of the electronic affinities of candidate molecular ions

From: Sympathetic cooling of molecular ions with ultracold atoms

Molecule EA [eV] Molecule EA [eV] Molecule EA [eV] Molecule EA [eV] Molecule EA [eV]
Rb\(_{2}^{+}\) 3.5 Li\(_{2}^{+}\) 5.1 YH\(_{2}^{+}\) 6.2 TiS + 7.1 NaI + 7.64
Cs\(_{2}^{+}\) 3.6 SrF + 5.3 HoF + 6.2 GeCl + 7.2 RbBr + 7.7
K\(_{2}^{+}\) 4.1 SrCl + 5.5 Ti\(_{2}^{+}\) 6.3 CsI + 7.25 Pd\(_{2}^{+}\) 7.7
KNa + 4.4 SrBr + 5.5 US + 6.3 SiF + 7.26 C 6H7N+ 7.7
KLi + 4.6 SrI + 5.5 ErF + 6.3 GeBr + 7.3 (Aniline)  
BaI + 4.7 CaBr + 5.6 TiO + 6.4 SnF + 7.4 LiD + 7.7
BaBr + 4.8 UO + 5.7 V\(_{2}^{+}\) 6.4 SnBr + 7.4 CsBr + 7.72
SrF + 4.9 CaF + 5.8 CaO + 6.5 Mn\(_{2}^{+}\) 7.4 PbBr + 7.8
CeO + 4.9 CaH + 5.9 SnCl + 6.6 Si\(_{2}^{+}\) 7.4 BSi + 7.8
BaF + 4.9 CaCl + 6 TiO + 6.8 MgCl + 7.5 MgF + 7.8
PrO + 4.9 DyF + 6 BaO + 6.9 PbF + 7.5 N(CH\(_{3})_{3}^{+}\) 7.82
Na\(_{2}^{+}\) 4.9 TaO + 6 UN + 7 PbCl + 7.5 (Trimethylamine)  
LaO + 4.9 TiH + 6 InS + 7 N(CH2CH\(_{3})_{3}^{+}\) 7.5 LiH + 7.85
BaCl + 5.0 SrO + 6.1 ZrH\(_{2}^{+}\) 7 (Triethylamine)   Cu\(_{2}^{+}\) 7.89
LiNa + 5.0 ZrO + 6.1 InSe + 7.1 HfO + 7.5 PtSi + 7.9
VO + 5.0 CaI + 6.1 TiS + 7.1 GeF + 7.5 Ge2 + 7.9
NdO + 5.0 UC + 6.2 RbI + 7.1 InTe + 7.6 ZrN + 7.9
  1. Charge exchange is forbidden in collisions with a neutral atom if the molecule EA is smaller than the IP of the neutral atom. We emphasize that this is only a partial list of molecules and that the number of molecular ions that can be cooled by this technique is likely much larger. Data taken from [8082]