Electron affinity (data page)

This page deals with the electron affinity as a property of isolated atoms or molecules (i.e. in the gas phase). Solid state electron affinities are not listed here.

Elements

Electron affinity can be defined in two equivalent ways. First, as the energy that is released by adding an electron to an isolated gaseous atom. The second (reverse) definition is that electron affinity is the energy required to remove an electron from a singly charged gaseous negative ion. Either convention can be used.[1] Whereas ionization energies are always concerned with the formation of positive ions, electron affinities are the negative ion equivalent.

Negative electron affinities can be used in those cases where electron capture requires energy, i.e. when capture can occur only if the impinging electron has a kinetic energy large enough to excite a resonance of the atom-plus-electron system. Conversely electron removal from the anion formed in this way releases energy, which is carried out by the freed electron as kinetic energy. Negative ions formed in these cases are always unstable. They may have lifetimes of the order of microseconds to milliseconds, and invariably autodetach after some time.

Z	Element	Name	Electron affinity (eV)	Electron affinity (kJ/mol)	References
1	¹H	Hydrogen	0.754 195(19)	72.769(2)	[2]
1	²H	Deuterium	0.754 59(8)	72.807(8)	[2]
2	He	Helium	-0.5(2)	-48(20)	estimated (est.)[3]
3	Li	Lithium	0.618 049(22)	59.632 6(21)	[4]
4	Be	Beryllium	-0.5(2)	-48(20)	est.[3]
5	B	Boron	0.279 723(25)	26.989(3)	[5]
6	¹²C	Carbon	1.262 122 6(11)	121.776 3(1)	[6]
6	¹³C	Carbon	1.262 113 6(12)	121.775 5(2)	[6]
7	N	Nitrogen	-0.07	-6.8	[3]
8	¹⁶O	Oxygen	1.461 113 6(9)	140.976 0(2)	[7]
8	¹⁷O	Oxygen	1.461 108 (4)	140.975 5(3)	[8]
8	¹⁸O	Oxygen	1.461 105(3)	140.975 2(3)	[8]
9	F	Fluorine	3.401 189 8(24)	328.164 9(3)	[9][10]
10	Ne	Neon	-1.2(2)	-116(19)	est.[3]
11	Na	Sodium	0.547 926(25)	52.867(3)	[11]
12	Mg	Magnesium	-0.4(2)	-40(19)	est.[3]
13	Al	Aluminium	0.432 83(5)	41.762(5)	[12]
14	Si	Silicon	1.389 521 2(8)	134.068 4(1)	[7]
15	P	Phosphorus	0.746 607(10)	72.037(1)	[13]
16	³²S	Sulfur	2.077 104 2(6)	200.410 1(1)	[7]
16	³⁴S	Sulfur	2.077 104 5(12)	200.410 1(2)	[14]
17	Cl	Chlorine	3.612 725(28)	348.575(3)	[15]
18	Ar	Argon	-1.0(2)	-96(20)	est.[3]
19	K	Potassium	0.501 459(13)	48.383(2)	[16]
20	Ca	Calcium	0.024 55(1)	2.37(1)	[17]
21	Sc	Scandium	0.188(20)	18(2)	[18]
22	Ti	Titanium	0.075 54(5)	7.289(5)	[19]
23	V	Vanadium	0.527 66(20)	50.911(20)	[20]
24	Cr	Chromium	0.675 84(12)	65.21(2)	[21]
25	Mn	Manganese	-0.5(2)	-50(19)	est.[3]
26	Fe	Iron	0.153 236(34)	14.785(4)	[22]
27	Co	Cobalt	0.662 26(5)	63.898(5)	[23]
28	Ni	Nickel	1.157 16(12)	111.65(2)	[24]
29	Cu	Copper	1.235 78(4)	119.235(4)	[21]
30	Zn	Zinc	-0.6(2)	-58(20)	est.[3]
31	Ga	Gallium	0.301 20(11)	29.061(12)	[25]
32	Ge	Germanium	1.232 676 4(13)	118.935 2(2)	[26]
33	As	Arsenic	0.804 8(2)	77.65(2)	[27]
34	Se	Selenium	2.020 604 7(12)	194.958 7(2)	[28]
35	Br	Bromine	3.363 588(3)	324.536 9(3)	[9]
36	Kr	Krypton	-1.0(2)	-96(20)	est.[3]
37	Rb	Rubidium	0.485 916(21)	46.884(3)	[29]
38	Sr	Strontium	0.052 06(6)	5.023(6)	[30]
39	Y	Yttrium	0.307(12)	29.6(12)	[18]
40	Zr	Zirconium	0.433 28(9)	41.806(9)	[31]
41	Nb	Niobium	0.917 40(7)	88.516(7)	[32]
42	Mo	Molybdenum	0.747 3(3)	72.10(3)	[21]
43	Tc	Technetium	0.55(20)	53(20)	est.[33]
44	Ru	Ruthenium	1.046 38(25)	100.96(3)	[34]
45	Rh	Rhodium	1.142 89(20)	110.27(2)	[24]
46	Pd	Palladium	0.562 14(12)	54.24(2)	[24]
47	Ag	Silver	1.304 47(3)	125.862(3)	[21]
48	Cd	Cadmium	-0.7(2)	-68(20)	est.[3]
49	In	Indium	0.383 92(6)	37.043(6)	[35]
50	Sn	Tin	1.112 070(2)	107.298 4(3)	[36]
51	Sb	Antimony	1.047 401(19)	101.059(2)	[37]
52	Te	Tellurium	1.970 875(7)	190.161(1)	[38]
53	¹²⁷I	Iodine	3.059 046 5(37)	295.1531(4)	[39]
53	¹²⁸I	Iodine	3.059 052(38)	295.154(4)	[40]
54	Xe	Xenon	-0.8(2)	-77(20)	est.[3]
55	Cs	Caesium	0.471 630(25)	45.505(3)	[11][41]
56	Ba	Barium	0.144 62(6)	13.954(6)	[42]
57	La	Lanthanum	0.557 546(20)	53.795(2)	[43]
58	Ce	Cerium	0.57(2)	55(2)	[44]
59	Pr	Praseodymium	0.109 23(46)	10.539(45)	[45]
60	Nd	Neodymium	0.097 49(33)	9.406(32)	[45]
61	Pm	Promethium	0.129	12.45	[46]
62	Sm	Samarium	0.162	15.63	[46]
63	Eu	Europium	0.116(13)	11.2(13)	[47]
64	Gd	Gadolinium	0.137	13.22	[46]
65	Tb	Terbium	0.131 31(80)	12.670(77)	[45]
66	Dy	Dysprosium	0.352	33.96	min. value[33]
67	Ho	Holmium	0.338	32.61	[46]
68	Er	Erbium	0.312	30.10	[46]
69	Tm	Thulium	1.029(22)	99(3)	[48]
70	Yb	Ytterbium	-0.02	-1.93	est.[33]
71	Lu	Lutetium	0.2388(7)	23.04(7)	[49]
72	Hf	Hafnium	0.1780(7)	17.18(7)	[50]
73	Ta	Tantalum	0.323(12)	31(2)	[51]
74	W	Tungsten	0.816 26(8)	78.76(1)	[52]
75	Re	Rhenium	0.060 396(63)	5.8273(61)	[53]
76	Os	Osmium	1.077 80(13)	103.99(2)	[54]
77	Ir	Iridium	1.564 36(15)	150.94(2)	[55]
78	Pt	Platinum	2.125 10(5)	205.041(5)	[55]
79	Au	Gold	2.308 610(25)	222.747(3)	[56]
80	Hg	Mercury	-0.5(2)	-48(20)	est.[3]
81	Tl	Thallium	0.320 053(19)	30.8804(19)	[57]
82	Pb	Lead	0.356 721(2)	34.4183(3)	[58]
83	Bi	Bismuth	0.942 362(13)	90.924(2)	[59]
84	Po	Polonium	1.40(7)	136(7)	calculated (calc.)[60]
85	At	Astatine	2.415 78(7)	233.087(8)	[61]
86	Rn	Radon	-0.7(2)	-68(20)	est.[3]
87	Fr	Francium	0.486	46.89	est.[62][33]
88	Ra	Radium	0.10	9.6485	est.[63][33]
89	Ac	Actinium	0.35	33.77	est.[33]
90	Th	Thorium	1.17	112.72	est.[64]
91	Pa	Protactinium	0.55	53.03	est.[64]
92	U	Uranium	0.53	50.94	est.[64]
93	Np	Neptunium	0.48	45.85	est.[64]
94	Pu	Plutonium	-0.50	-48.33	est.[64]
95	Am	Americium	0.10	9.93	est.[64]
96	Cm	Curium	0.28	27.17	est.[64]
97	Bk	Berkelium	-1.72	-165.24	est.[64]
98	Cf	Californium	-1.01	-97.31	est.[64]
99	Es	Einsteinium	-0.30	-28.60	est.[64]
100	Fm	Fermium	0.35	33.96	est.[64]
101	Md	Mendelevium	0.98	93.91	est.[64]
102	No	Nobelium	-2.33	-223.22	est.[64]
103	Lr	Lawrencium	-0.31	-30.04	est.[64]
111	Rg	Roentgenium	1.565	151.0	calc.[65]
113	Nh	Nihonium	0.69	66.6	calc.[66]
115	Mc	Moscovium	0.366	35.3	calc.[66]
116	Lv	Livermorium	0.776	74.9	calc.[66]
117	Ts	Tennessine	1.719	165.9	calc.[66]
118	Og	Oganesson	0.056(10)	5.403 18	calc.[67]
119	Uue	Ununennium	0.662	63.87	calc.[62]
120	Ubn	Unbinilium	0.021	2.03	calc.[68]
121	Ubu	Unbiunium	0.57	55	calc.[33]

Molecules

The electron affinities E_ea of some molecules are given in the table below, from the lightest to the heaviest. Many more have been listed by Rienstra-Kiracofe et al. (2002). The electron affinities of the radicals OH and SH are the most precisely known of all molecular electron affinities.

Molecule	Name	E_ea (eV)	E_ea (kJ/mol)	References
Diatomics
¹⁶OH	Hydroxyl	1.827 6488(11)	176.3413(2)	Goldfarb et al. (2005)
¹⁶OD		1.825 53(4)	176.137(5)	Schulz et al. (1982)
C₂	Dicarbon	3.269(6)	315.4(6)	Ervin & Lineberger (1991)
BO	Boron oxide	2.508(8)	242.0(8)	Wenthold et al. (1997)
NO	Nitric oxide	0.026(5)	2.5(5)	Travers, Cowles & Ellison (1989)
O₂	Dioxygen	0.450(2)	43.42(20)	Schiedt & Weinkauf (1995)
³²SH	Sulfhydryl	2.314 7283(17)	223.3373(2)	Chaibi et al. (2006)
F₂	Difluorine	3.08(10)	297(10)	Janousek & Brauman (1979)
Cl₂	Dichlorine	2.35(8)	227(8)	Janousek & Brauman (1979)
Br₂	Dibromine	2.53(8)	244(8)	Janousek & Brauman (1979)
I₂	Diiodine	2.524(5)	243.5(5)	Zanni et al. (1997)
IBr	Iodine bromide	2.512(3)	242.4(4)	Sheps, Miller & Lineberger (2009)
LiCl	Lithium chloride	0.593(10)	57.2(10)	Miller et al. (1986)
FeO	Iron(II) oxide	1.4950(5)	144.25(6)	Kim, Weichman & Neumark (2015)
Triatomics
NO₂	Nitrogen dioxide	2.273(5)	219.3(5)	Ervin, Ho & Lineberger (1988)
O₃	Ozone	2.1028(25)	202.89(25)	Novick et al. (1979)
SO₂	Sulfur dioxide	1.107(8)	106.8(8)	Nimlos & Ellison (1986)
Larger polyatomics
CH₂CHO	Vinyloxy	1.8248(+2-6)	176.07(+3-7)	Rienstra-Kiracofe et al. (2002) after Mead et al. (1984)
C₆H₆	Benzene	-0.70(14)	−68(14)	Ruoff et al. (1995)
C₆H₄O₂	p-Benzoquinone	1.860(5)	179.5(6)	Schiedt & Weinkauf (1999)
BF₃	Boron trifluoride	2.65(10)	256(10)	Page & Goode (1969)
HNO₃	Nitric acid	0.57(15)	55(14)	Janousek & Brauman (1979)
CH₃NO₂	Nitromethane	0.172(6)	16.6(6)	Adams et al. (2009)
POCl₃	Phosphoryl chloride	1.41(20)	136(20)	Mathur et al. (1976)
SF₆	Sulfur hexafluoride	1.03(5)	99.4(49)	Troe, Miller & Viggiano (2012)
C₂(CN)₄	Tetracyanoethylene	3.17(20)	306(20)	Chowdhury & Kebarle (1986)
WF₆	Tungsten hexafluoride	3.5(1)	338(10)	George & Beauchamp (1979)
UF₆	Uranium hexafluoride	5.06(20)	488(20)	NIST chemistry webbook after Borshchevskii et al. (1988)
C₆₀	Buckminsterfullerene	2.6835(6)	258.92(6)	Huang et al. (2014)

Second and third electron affinity

Z	Element	Name	Electron affinity (eV)	Electron affinity (kJ/mol)	References
7	N⁻	Nitrogen	-6.98	-673	[69]
7	N^2-	Nitrogen	-11.09	-1070	[69]
8	O⁻	Oxygen	-7.71	-744	[69]
15	P⁻	Phosphorus	-4.85	-468	[69]
15	P^2-	Phosphorus	-9.18	-886	[69]

Bibliography

Janousek, Bruce K.; Brauman, John I. (1979), "Electron affinities", in Bowers, M. T. (ed.), Gas Phase Ion Chemistry, 2, New York: Academic Press, p. 53.
Rienstra-Kiracofe, J.C.; Tschumper, G.S.; Schaefer, H.F.; Nandi, S.; Ellison, G.B. (2002), "Atomic and molecular electron affinities: Photoelectron experiments and theoretical computations", Chem. Rev., 102 (1), pp. 231–282, doi:10.1021/cr990044u, PMID 11782134.
Updated values can be found in the NIST chemistry webbook for around three dozen elements and close to 400 compounds.

Specific molecules

Adams, C.L.; Schneider, H.; Ervin, K.M.; Weber, J.M. (2009), "Low-energy photoelectron imaging spectroscopy of nitromethane anions: Electron affinity, vibrational features, anisotropies, and the dipole-bound state", J. Chem. Phys., 130 (7): 074307, Bibcode:2009JChPh.130g4307A, doi:10.1063/1.3076892, PMID 19239294
Borshchevskii, A.Ya.; Boltalina, O.V.; Sorokin, I.D.; Sidorov, L.N. (1988), "Thermochemical quantities for gas-phase iron, uranium, and molybdenum fluorides, and their negative ions", J. Chem. Thermodyn., 20 (5): 523, doi:10.1016/0021-9614(88)90080-8
Chaibi, W.; Delsart, C.; Drag, C.; Blondel, C. (2006), "High precision measurement of the ³²SH electron affinity by laser detachment microscopy", J. Mol. Spectrosc., 239 (1): 11, Bibcode:2006JMoSp.239...11C, doi:10.1016/j.jms.2006.05.012
Chowdhury, S.; Kebarle, P. (1986), "Electron affinities of di- and tetracyanoethylene and cyanobenzenes based on measurements of gas-phase electron-transfer equilibria", J. Am. Chem. Soc., 108 (18): 5453, doi:10.1021/ja00278a014
Ervin, K.M.; Ho, J.; Lineberger, W.C. (1988), "Ultraviolet photoelectron spectrum of nitrite anion", J. Phys. Chem., 92 (19): 5405, doi:10.1021/j100330a017
Ervin, K.M.; Lineberger, W.C. (1991), "Photoelectron spectra of C⁻
₂ and C₂H⁻", J. Phys. Chem., 95 (3): 1167, doi:10.1021/j100156a026
George, P.M.; Beauchamp, J.L. (1979), "The electron and fluoride affinities of tungsten hexafluoride by ion cyclotron resonance spectroscopy", Chem. Phys., 36 (3): 345, Bibcode:1979CP.....36..345G, doi:10.1016/0301-0104(79)85018-1
Goldfarb, F.; Drag, C.; Chaibi, W.; Kröger, S.; Blondel, C.; Delsart, C. (2005), "Photodetachment microscopy of the P, Q, and R branches of the OH⁻(v=0) to OH(v=0) detachment threshold", J. Chem. Phys., 122 (1): 014308, Bibcode:2005JChPh.122a4308G, doi:10.1063/1.1824904, PMID 15638660
Huang, Dao-Ling; Dau, Phuong Diem; Liu, Hong-Tao; Wang, Lai-Sheng (2014), "High-resolution photoelectron imaging of cold C⁻
₆₀ anions and accurate determination of the electron affinity of C₆₀", J. Chem. Phys., 140 (22): 224315, Bibcode:2014JChPh.140v4315H, doi:10.1063/1.4881421, PMID 24929396, S2CID 1061364
Kim, J.B.; Weichman, M.L.; Neumark, D.M. (2015), "Low-lying states of FeO and FeO⁻ by slow photoelectron spectroscopy", Mol. Phys., 113 (15–16): 2105, Bibcode:2015MolPh.113.2105K, doi:10.1080/00268976.2015.1005706
Mathur, B.P.; Rothe, E.W.; Tang, S.Y.; Reck, G.P. (1976), "Negative ions from phosphorus halides due to cesium charge exchange", J. Chem. Phys., 65 (2): 565, Bibcode:1976JChPh..65..565M, doi:10.1063/1.433109
Mead, R.D.; Lykke, K.R.; Lineberger, W.C.; Marks, J.; Brauman, J.I. (1984), "Spectroscopy and dynamics of the dipole-bound state of acetaldehyde enolate", J. Chem. Phys., 81 (11): 4883, Bibcode:1984JChPh..81.4883M, doi:10.1063/1.447515
Miller, T.M.; Leopold, D.G.; Murray, K.K.; Lineberger, W.C. (1986), "Electron affinities of the alkali halides and the structure of their negative ions", J. Chem. Phys., 85 (5): 2368, Bibcode:1986JChPh..85.2368M, doi:10.1063/1.451091
Nimlos, Mark R.; Ellison, G. Barney (1986), "Photoelectron spectroscopy of sulfur-containing anions (SO⁻
₂, S⁻
₃, and S₂O⁻)", J. Phys. Chem., 90 (12): 2574, doi:10.1021/j100403a007
Novick, S.E.; Engelking, P.C.; Jones, P.L.; Futrell, J.H.; Lineberger, W.C. (1979), "Laser photoelectron, photodetachment, and photodestruction spectra of O⁻
₃", J. Chem. Phys., 70 (6): 2652, Bibcode:1979JChPh..70.2652N, doi:10.1063/1.437842
Page, F. M.; Goode, G. C. (1969), Negative ions and the magnetron, John Wiley & Sons[70]
Ruoff, R.S.; Kadish, K.M.; Boulas, P.; Chen, E.C.M. (1995), "Relationship between the Electron Affinities and Half-Wave Reduction Potentials of Fullerenes, Aromatic Hydrocarbons, and Metal Complexes", J. Phys. Chem., 99 (21): 8843, doi:10.1021/j100021a060
Schiedt, J.; Weinkauf, R. (1995), "Spin-orbit coupling in the O⁻
₂ anion", Z. Naturforsch. A, 50 (11): 1041, Bibcode:1995ZNatA..50.1041S, doi:10.1515/zna-1995-1110
Schiedt, J.; Weinkauf, R. (1999), "Resonant photodetachment via shape and Feshbach resonances: p-benzoquinone anions as a model system", J. Chem. Phys., 110 (1): 304, Bibcode:1999JChPh.110..304S, doi:10.1063/1.478066
Schulz, P.A.; Mead, R.D.; Jones, P.L.; Lineberger, W.C. (1982), "OH⁻ and OD⁻ threshold photodetachment", J. Chem. Phys., 77 (3): 1153, Bibcode:1982JChPh..77.1153S, doi:10.1063/1.443980
Sheps, L.; Miller, E.M.; Lineberger, W.C. (2009), "Photoelectron spectroscopy of small IBr⁻(CO₂)_n(n=0–3) cluster anions", J. Chem. Phys., 131 (1): 064304, Bibcode:2009JChPh.131a4304G, doi:10.1063/1.3157185, hdl:20.500.11850/209930, PMID 19586102
Travers, M.J.; Cowles, D.C.; Ellison, G.B. (1989), "Reinvestigation of the electron affinities of O₂ and NO", Chem. Phys. Lett., 164 (5): 449, Bibcode:1989CPL...164..449T, doi:10.1016/0009-2614(89)85237-6
Troe, J.; Miller, T.M.; Viggiano, A.A. (2012), "Communication:Revised electron affinity of SF₆ from kinetic data", J. Chem. Phys., 136 (2): 121102, Bibcode:2012JChPh.136b1102G, doi:10.1063/1.3698170, PMID 22462826
Wenthold, P.G.; Kim, J.B.; Jonas, K.-L.; Lineberger, W.C. (1997), "An Experimental and Computational Study of the Electron Affinity of Boron Oxide", J. Phys. Chem. A, 101 (24): 4472, Bibcode:1997JPCA..101.4472W, CiteSeerX 10.1.1.497.1352, doi:10.1021/jp970645u
Zanni, M.T.; Taylor, T.R.; Greenblatt, B.J.; Soep, B.; Neumark, D.M. (1997), "Characterization of the I⁻
₂ anion ground state using conventional and femtosecond photoelectron spectroscopy", J. Chem. Phys., 107 (19): 7613, Bibcode:1997JChPh.107.7613Z, doi:10.1063/1.475110

References

IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version: (2006–) "Electron affinity". doi:10.1351/goldbook.E01977
Lykke, K.R.; Murray, K.K.; Lineberger, W.C. (1991). "Threshold Photodetachment of H⁻". Physical Review A. 43 (11): 6104–7. doi:10.1103/PhysRevA.43.6104. PMID 9904944.
Bratsch, S.G.; Lagowski, J.J. (1986). "Predicted stabilities of monatomic anions in water and liquid ammonia at 298.15 K.". Polyhedron. 5 (11): 1763–1770. doi:10.1016/S0277-5387(00)84854-8.
Haeffler, G.; Hanstorp, D.; Kiyan, I.; Klinkmüller, A.E.; Ljungblad, U.; Pegg, D.J. (1996a). "Electron affinity of Li: A state-selective measurement". Phys. Rev. A. 53 (6): 4127–31. arXiv:physics/9703013. Bibcode:1996PhRvA..53.4127H. doi:10.1103/PhysRevA.53.4127. PMID 9913377.
Scheer, M.; Bilodeau, R.C.; Haugen, H.K. (1998). "Negative ion of boron: An experimental study of the ³P ground state". Phys. Rev. Lett. 80 (12): 2562–65. Bibcode:1998PhRvL..80.2562S. doi:10.1103/PhysRevLett.80.2562.
Bresteau, D.; Drag, C.; Blondel, C. (2016). "Isotope shift of the electron affinity of carbon measured by photodetachment microscopy". Phys. Rev. A. 93 (1): 013414. Bibcode:2016PhRvA..93a3414B. doi:10.1103/PhysRevA.93.013414.
Chaibi, W.; Peláez, R.J.; Blondel, C.; Drag, C.; Delsart, C. (2010). "Effect of a magnetic field in photodetachment microscopy". Eur. Phys. J. D. 58 (1): 29. Bibcode:2010EPJD...58...29C. doi:10.1140/epjd/e2010-00086-7.
Blondel, C.; Delsart, C.; Valli, C.; Yiou, S.; Godefroid, M.R.; Van Eck, S. (2001). "Electron affinities of ¹⁶ O, ¹⁷ O, ¹⁸ O, the fine structure of ¹⁶O⁻, and the hyperfine structure of ¹⁷O⁻". Phys. Rev. A. 64 (5): 052504. doi:10.1103/PhysRevA.64.052504.
Blondel, C.; Cacciani, P.; Delsart, C.; Trainham, R. (1989). "High Resolution Determination of the Electron Affinity of Fluorine and Bromine using Crossed Ion and Laser Beams". Phys. Rev. A. 40 (7): 3698–3701. Bibcode:1989PhRvA..40.3698B. doi:10.1103/PhysRevA.40.3698. PMID 9902584.
Blondel, C.; Delsart, C.; Goldfarb, F. (2001). "Electron spectrometry at the μeV level and the electron affinities of Si and F". Journal of Physics B. 34: L281–88. doi:10.1088/0953-4075/34/9/101.
Hotop, H.; Lineberger, W.C. (1985). "Binding energies in atomic negative ions. II". J. Phys. Chem. Ref. Data. 14 (3): 731. Bibcode:1985JPCRD..14..731H. doi:10.1063/1.555735.
Scheer, M.; Bilodeau, R.C.; Thøgersen, J.; Haugen, H.K. (1998b). "Threshold Photodetachment of Al⁻: Electron Affinity and Fine Structure". Phys. Rev. A. 57 (3): R1493–96. Bibcode:1998PhRvA..57.1493S. doi:10.1103/PhysRevA.57.R1493.
Peláez, R.J.; Blondel, C.; Vandevraye, M.; Drag, C.; Delsart, C. (2011). "Photodetachment microscopy to an excited spectral term and the electron affinity of phosphorus". J. Phys. B: At. Mol. Opt. Phys. 44 (19): 195009. Bibcode:2011JPhB...44s5009P. doi:10.1088/0953-4075/44/19/195009. hdl:10261/62382.
Carette, T.; Drag, C.; Scharf, O.; Blondel, C.; Delsart, C.; Fischer, C. (2000). "F. & Godefroid M. (2010). Isotope shift in the sulfur electron affinity: Observation and theory". Phys. Rev. A. 81: 042522. arXiv:1002.1297. doi:10.1103/PhysRevA.81.042522.
Berzinsh, U.; Gustafsson, M.; Hanstorp, D.; Klinkmüller, A.; Ljungblad, U.; Martensson-Pendrill, A.M. (1995). "Isotope shift in the electron affinity of chlorine". Phys. Rev. A. 51 (1): 231–238. arXiv:physics/9804028. Bibcode:1995PhRvA..51..231B. doi:10.1103/PhysRevA.51.231. PMID 9911578.
Andersson, K.T.; Sandstrom, J.; Kiyan, I.Y.; Hanstorp, D.; Pegg, D.J. (2000). "Measurement of the electron affinity of potassium". Phys. Rev. A. 62 (2): 022503. Bibcode:2000PhRvA..62b2503A. doi:10.1103/PhysRevA.62.022503.
Petrunin, V.V.; Andersen, H.H.; Balling, P.; Andersen, T. (1996). "Structural Properties of the Negative Calcium Ion: Binding Energies and Fine-structure Splitting". Phys. Rev. Lett. 76 (5): 744–47. Bibcode:1996PhRvL..76..744P. doi:10.1103/PhysRevLett.76.744. PMID 10061539.
Feigerle, C.S.; Herman, Z.; Lineberger, W.C. (1981). "Laser Photoelectron Spectroscopy of Sc⁻ and Y⁻: A Determination of the Order of Electron Filling in Transition Metal Anions". J. Electron Spectrosc. 23: 441–50. doi:10.1016/0368-2048(81)85050-5.
Tang, R.; Fu, X.; Ning, C. (2018). "Accurate electron affinity of Ti and fine structures of its anions". J. Chem. Phys. 149 (13): 134304. Bibcode:2018JChPh.149m4304T. doi:10.1063/1.5049629. PMID 30292212.
Fu, X.; Luo, Z.; Chen, X.; Li, J.; Ning, C. (2016). "Accurate electron affinity of V and fine-structure splittings of V⁻ via slow-electron velocity-map imaging". J. Chem. Phys. 145 (16): 164307. Bibcode:2016JChPh.145p4307F. doi:10.1063/1.4965928. PMID 27802620.
Bilodeau, R.C.; Scheer, M.; Haugen, H.K. (1998). "Infrared Laser Photodetachment of Transition Metal Negative Ions: Studies on Cr⁻, Mo⁻, Cu⁻, and Ag⁻". Journal of Physics B. 31: 3885–91. doi:10.1088/0953-4075/31/17/013.
Chen, X.; Luo, Z.; Li, J.; Ning, C. (2016). "Accurate Electron Affinity of Iron and Fine Structures of Negative Iron ions". Sci. Rep. 6: 24996. Bibcode:2016NatSR...624996C. doi:10.1038/srep24996. PMC 4853736. PMID 27138292.
Chen, X.; Ning, C. (2016). "Accurate electron affinity of Co and fine-structure splittings of Co⁻ via slow-electron velocity-map imaging". Phys. Rev. A. 93 (5): 052508. Bibcode:2016PhRvA..93e2508C. doi:10.1103/PhysRevA.93.052508.
Scheer, M.; Brodie, C.A.; Bilodeau, R.C.; Haugen, H.K. (1998c). "Laser spectroscopic measurements of binding energies and fine-structure splittings of Co⁻, Ni⁻, Rh⁻, and Pd⁻". Phys. Rev. A. 58 (3): 2051–62. doi:10.1103/PhysRevA.58.2051.
Gibson, N.D.; Walter, C.W; Crocker, C.; Wang, J.; Nakayama, W.; Yukich, J.; Eliav, E.; Kaldor, U. (2019). "Electron affinity of gallium and fine structure of Ga⁻: Experiment and theory". Phys. Rev. A. 100: 052512. doi:10.1103/PhysRevA.100.052512.
Bresteau, D.; Babilotte, Ph.; Drag, C.; Blondel, C. (2015). "Intra-cavity photodetachment microscopy and the electron affinity of germanium". J. Phys. B: At. Mol. Opt. Phys. 48 (12): 125001. Bibcode:2015JPhB...48l5001B. doi:10.1088/0953-4075/48/12/125001.
Walter, C. W.; Gibson, N. D.; Field, R. L.; Snedden, A. P.; Shapiro, J. Z.; Janczak, C. M.; Hanstorp, D. (2009). "Electron affinity of arsenic and the fine structure of As⁻ measured using infrared photodetachment threshold spectroscopy". Phys. Rev. A. 80 (1): 014501. Bibcode:2009PhRvA..80a4501W. doi:10.1103/physreva.80.014501.
Vandevraye, M.; Drag, C.; Blondel, C. (2012). "Electron affinity of selenium measured by photodetachment microscopy". Phys. Rev. A. 85 (1): 015401. Bibcode:2012PhRvA..85a5401V. doi:10.1103/PhysRevA.85.015401.
Frey, P.; Breyer, F.; Hotop, H. (1978). "High Resolution Photodetachment from the Rubidium Negative Ion around the Rb(5p_1/2) Threshold. Journal of Physics BJ. Phys. B: At. Mol. Phys". Chinese Journal of Chemical Physics. 11: L589–94. doi:10.1088/0022-3700/11/19/005.
Andersen, H.H.; Petrunin, V.V.; Kristensen, P.; Andersen, T. (1997). "Structural properties of the negative strontium ion: Binding energy and fine-structure splitting". Phys. Rev. A. 55 (4): 3247–49. Bibcode:1997PhRvA..55.3247A. doi:10.1103/PhysRevA.55.3247.
Fu, X.; Li, J.; Luo, Z.; Chen, X.; Ning, C. (2017). "Precision measurement of electron affinity of Zr and fine structures of its negative ions. Journal of Chemical Physics J. Chem. Phys". The Journal of Chemical Physics. 147 (6): 064306. doi:10.1063/1.4986547. PMID 28810756.
Luo Z., Chen X., Li J. & Ning C. (2016). Precision measurement of the electron affinity of niobium. Phys. Rev. A 93, 020501(R) doi:10.1103/PhysRevA.93.020501
CRC Handbook of Chemistry and Physics 92nd Edn. (2011–2012); W. M. Haynes. Boca Raton, FL: CRC Press. "Section 10, Atomic, Molecular, and Optical Physics; Electron Affinities".
Norquist, P.L.; Beck, D.R.; Bilodeau, R.C.; Scheer, M.; Srawley, R.A.; Haugen, H.K. (1999). "Theoretical and experimental binding energies for the d⁷s² ⁴F levels in Ru⁻, including calculated hyperfine structure and M1 decay rates". Phys. Rev. A. 59 (3): 1896–1902. Bibcode:1999PhRvA..59.1896N. doi:10.1103/PhysRevA.59.1896.
Walter, C.W.; Gibson, N.D.; Carman, D.J.; Li, Y.-G.; Matyas, D.J. (2010). "Electron affinity of indium and the fine structure of In⁻ measured using infrared photodetachment threshold spectroscopy". Phys. Rev. A. 82 (3): 032507. Bibcode:2010PhRvA..82c2507W. doi:10.1103/PhysRevA.82.032507.
Vandevraye, M.; Drag, C.; Blondel, C. (2013). "Electron affinity of tin measured by photodetachment microscopy". Journal of Physics B: Atomic, Molecular and Optical Physics. 46 (12): 125002. Bibcode:2013JPhB...46l5002V. doi:10.1088/0953-4075/46/12/125002.
Scheer, M.; Haugen, H.K.; Beck, D.R. (1997). "Single- and Multiphoton Infrared Laser Spectroscopy of Sb⁻: A Case Study". Phys. Rev. Lett. 79 (21): 4104–7. Bibcode:1997PhRvL..79.4104S. doi:10.1103/PhysRevLett.79.4104.
Haeffler, G.; Klinkmüller, A.E.; Rangell, J.; Berzinsh, U.; Hanstorp, D. (1996b). "The Electron Affinity of Tellurium. Zeitschrift für Physik D Z. Phys. D". Journal of Physical and Chemical Reference Data. 38: 211. arXiv:physics/9703012. doi:10.1007/s004600050085.
Peláez R.J., Blondel C., Delsart C. and Drag C. (2009) J. Phys. B 42 125001 doi:10.1088/0953-4075/42/12/125001
Rothe, S.; Sundberg, J.; Welander, J.; Chrysalidis, K.; Goodacre, T. (2017). "D., Fedosseev V., ... & Kron T. (2017). Laser photodetachment of radioactive ¹²⁸I⁻". J. Phys. G: Nucl. Part. Phys. 44: 104003. doi:10.1088/1361-6471/aa80aa.
Scheer, M.; Thøgersen, J.; Bilodeau, R.C.; Brodie, C.A.; Haugen, H.K. (1998d). "Experimental Evidence that the 6s6p ³P_J States of Cs⁻ are Shape Resonances". Phys. Rev. Lett. 80 (4): 684–87. Bibcode:1998PhRvL..80..684S. doi:10.1103/PhysRevLett.80.684.
Petrunin, V.V.; Volstad, J.D.; Balling, P.; Kristensen, K.; Andersen, T. (1995). "Resonant Ionization Spectroscopy of Ba⁻: Metastable and Stable Ions". Phys. Rev. Lett. 75 (10): 1911–14. Bibcode:1995PhRvL..75.1911P. doi:10.1103/PhysRevLett.75.1911. PMID 10059160.
Blondel, C (2020). "Comment on "Measurement of the electron affinity of the lanthanum atom"". Phys. Rev. A. 101 (1): 016501. Bibcode:2020PhRvA.101a6501B. doi:10.1103/PhysRevA.101.016501.
Felton, J.; Ray, M.; Jarrold, C.C. (2014). "Measurement of the electron affinity of atomic Ce". Phys. Rev. A. 89 (3): 033407. Bibcode:2014PhRvA..89c3407F. doi:10.1103/PhysRevA.89.033407.
Fu, X.; Lu, Y.; Tang, R.; Ning, C. (2020). "Electron affinity measurements of lanthanide atoms: Pr, Nd, and Tb". Phys. Rev. A. 101: 022502. doi:10.1103/PhysRevA.101.022502.
Felfli, Z.; Msezane, A.; Sokolovski, D. (2009). "Resonances in low-energy electron elastic cross sections for lanthanide atoms". Phys. Rev. A. 79 (1): 012714. Bibcode:2009PhRvA..79a2714F. doi:10.1103/PhysRevA.79.012714.
Cheng, S.B.; Castleman, A. W. Jr (2015). "Direct experimental observation of weakly-bound character of the attached electron in europium anion". Sci. Rep. 5: 12414. Bibcode:2015NatSR...512414C. doi:10.1038/srep12414. PMC 4510523. PMID 26198741.
Davis, V.T.; Thompson, J.S. (2002b). "Measurement of the electron affinity of thulium". Phys. Rev. A. 65 (1): 010501. Bibcode:2002PhRvA..65a0501D. doi:10.1103/PhysRevA.65.010501.
Fu, X. X.; Tang, R. L.; Lu, Y. Z.; Ning, C. G. (2019). "Measurement of electron affinity of atomic lutetium via the cryo-SEVI Method". Chinese J. Chem. Phys. 32 (2): 187. Bibcode:2019ChJCP..32..187F. doi:10.1063/1674-0068/cjcp1812293.
Tang R., Chen X., Fu X., Wang H. and Ning C. (2018). Electron affinity of the hafnium atom. Phys. Rev. A 98 020501(R) doi:10.1103/PhysRevA.98.020501.
Feigerle, C.S.; Corderman, R.R.; Bobashev, S.V.; Lineberger, W.C. (1981). "Binding energies and structure of transition metal negative ions". J. Chem. Phys. 74 (3): 1580. Bibcode:1981JChPh..74.1580F. doi:10.1063/1.441289.
Lindahl, A.O.; et al. (2010). "The electron affinity of tungsten". Eur. Phys. J. D. 60 (2): 219. Bibcode:2010EPJD...60..219L. doi:10.1140/epjd/e2010-00199-y.
Chen, X.L.; Ning, C.G. (2017). "Observation of Rhenium Anion and Electron Affinity of Re". J. Phys. Chem. Lett. 8 (12): 2735–2738. doi:10.1021/acs.jpclett.7b01079. PMID 28581753.
Bilodeau, R.C.; Haugen, H.K. (2000). "Experimental studies of Os⁻: Observation of a bound-bound electric dipole transition in an atomic negative ion". Phys. Rev. Lett. 85 (3): 534–37. Bibcode:2000PhRvL..85..534B. doi:10.1103/PhysRevLett.85.534. PMID 10991333.
Bilodeau, R.C.; Scheer, M.; Haugen, H.K.; Brooks, R.L. (1999). "Near-threshold Laser Spectroscopy of Iridium and Platinum Negative Ions: Electron Affinities and the Threshold Law". Phys. Rev. A. 61: 012505. doi:10.1103/PhysRevA.61.012505.
Andersen, T.; Haugen, H.K.; Hotop, H. (1999). "Binding Energies in Atomic Negative Ions: III". J. Phys. Chem. Ref. Data. 28 (6): 1511. Bibcode:1999JPCRD..28.1511A. doi:10.1063/1.556047.
Walter, C.W.; Gibson, N.D.; Spielman, S.E. (2020). "Electron affinity of thallium measured with threshold spectroscopy". Phys. Rev. A. 101: 052511. doi:10.1103/PhysRevA.101.052511.
Bresteau, D.; Drag, C.; Blondel, C. (2019). "Electron affinity of lead". J. Phys. B: At. Mol. Opt. Phys. 52 (6): 065001. Bibcode:2019JPhB...52f5001B. doi:10.1088/1361-6455/aaf685.
Bilodeau, R.C.; Haugen, H.K. (2001). "Electron affinity of Bi using infrared laser photodetachment threshold spectroscopy". Phys. Rev. A. 64 (2): 024501. Bibcode:2001PhRvA..64b4501B. doi:10.1103/PhysRevA.64.024501.
Junqin, Li; Zilong, Zhao; Martin, Andersson; Xuemei, Zhang; Chongyang, Chen (2012). "Theoretical study for the electron affinities of negative ions with the MCDHF method". J. Phys. B: At. Mol. Opt. Phys. 45 (16): 165004. Bibcode:2012JPhB...45p5004L. doi:10.1088/0953-4075/45/16/165004.
Leimbach, D.; et al. (2020). "The electron affinity of astatine". Nat. Commun. 11: 3824. doi:10.1038/s41467-020-17599-2.
Landau, A.; Eliav, E.; Ishikawa, Y.; Kaldor, U. (2001). "Benchmark calculations of electron affinities of the alkali atoms sodium to eka-francium (element 119)". J. Chem. Phys. 115 (6): 2389. Bibcode:2001JChPh.115.2389L. doi:10.1063/1.1386413.
Andersen, T. (2004). "Atomic negative ions: Structure, dynamics and collisions". Physics Reports. 394 (4–5): 157–313. Bibcode:2004PhR...394..157A. doi:10.1016/j.physrep.2004.01.001.
Guo, Y.; Whitehead, M.A. (1989). "Electron affinities of alkaline-earth element calculated with the local-spin-density-functional theory". Physical Review A. 40 (1): 28–34. doi:10.1103/PhysRevA.40.28. PMID 9901864.
Eliav, Ephraim; Fritzsche, Stephan; Kaldor, Uzi (2015). "Electronic structure theory of the superheavy elements". Nucl. Phys. A. 944: 518–550. Bibcode:2015NuPhA.944..518E. doi:10.1016/j.nuclphysa.2015.06.017.
Borschevsky, Anastasia; Pershina, Valeria; Kaldor, Uzi; Eliav, Ephraim. "Fully relativistic ab initio studies of superheavy elements" (PDF). www.kernchemie.uni-mainz.de. Johannes Gutenberg University Mainz. Archived from the original (PDF) on 15 January 2018. Retrieved 15 January 2018.
Eliav, Ephraim; Kaldor, Uzi; Ishikawa, Y; Pyykkö, P (1996). "Element 118: The First Rare Gas with an Electron Affinity". Phys. Rev. Lett. 77 (27): 5350–5352. Bibcode:1996PhRvL..77.5350E. doi:10.1103/PhysRevLett.77.5350. PMID 10062781.
Borschevsky, A.; Pershina, V.; Eliav, E.; Kaldor, U. (2013). "Ab initio predictions of atomic properties of element 120 and its lighter group-2 homologues". Phys. Rev. A. 87 (2): 022502–1–8. Bibcode:2013PhRvA..87b2502B. doi:10.1103/PhysRevA.87.022502.
Rayner-Canham Appendix 5: Data summarised from J. E. Huheey et al., Inorganic Chemistry, 4th ed. (New York: HarperCollins, 1993)
According to NIST as concerns Boron trifluoride, the Magnetron method, lacking mass analysis, is not considered reliable.