Ionization energies of quadruply ionized rare earths

Jack Sugar

doi:10.1364/JOSA.65.001366

Journal of the Optical Society of America
Vol. 65,
Issue 11,
pp. 1366-1367
(1975)
•https://doi.org/10.1364/JOSA.65.001366

Ionization energies of quadruply ionized rare earths

Jack Sugar

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Jack Sugar, "Ionization energies of quadruply ionized rare earths," J. Opt. Soc. Am. 65, 1366-1367 (1975)

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Abstract

Values for the ionization energies of four-times-ionized lanthanides are derived from interpolated spectroscopic properties of the 4f^N⁻¹ ns Ryberg series.

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Ion	SD 4f^N⁻¹5d–4f^N	ΔE 4f^N⁻¹6s–4f^N⁻¹5d	δ	ΔT 4f^N⁻¹6s–4f^N⁻¹7s	T f^N⁻¹6s	Ionization energy
Ion	SD 4f^N⁻¹5d–4f^N	ΔE 4f^N⁻¹6s–4f^N⁻¹5d	δ	ΔT 4f^N⁻¹6s–4f^N⁻¹7s	T f^N⁻¹6s	(cm⁻¹)	(eV)
Pr v	115 052.3^a	63 918.8^a	0	125 540.4^a	285 000	464 000 (400)	57.53(5)
Nd v	127 500(1000)	66 300 (1000)	239	128 400	289 900	483 900(2200)	60.00(27)
Pm v	136 400(1400)	66 200 (1500)	478	131 100	294 500	497 600(2700)	61.69(33)
Sm v	139 600(1800)	65 800 (2000)	717	133 900	299 300	505 400(3200)	62.66(40)
Eu v	140 000(2400)	65 300 (2000)	956	136 500	303 700	510 000(3600)	63.23(45)
Gd v	148 100(1800)	64 900 (2000)	1195	139 100	308 100	522 300(3200)	64.76(40)
Tb v	158 100(1000)	64 400 (1500)	1238	141 600	312 300	536 000(2500)	66.46(31)
Dy v	121 200(1400)	61 500 (1500)	1673	144 000	316 300	500 700(2700)	62.08(33)
Ho v	132 600(1400)	61 300 (1500)	1434	146 400	320 300	515 600(2700)	63.93(33)
Er v	140 500(1800)	59 100 (2000)	1195	148 800	324 300	525 100(3200)	65.10(40)
Tm v	141 700(1800)	57 000 (1000)	956	151 000	328 000	527 700(2700)	65.42(33)
Yb v	140 600(1400)	56 000 (1500)	717	153 200	331 600	528 900(2700)	65.58(33)
Lu v	146 500(1400)	56 500 (1500)	478	155 400	335 200	538 700(2700)	66.79(33)
Hf v	156 785.9^b	55 747.9^b	239	157 319^b	338 550	551 320(300)^b	68.356(25)
Ta v	0^c	47 052^c	0	159 494.2^c	342 290	389 340(100)^c	48.273(10)

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