Abstract

The ionization energies of the neutral rare earths have been derived by means of interpolated values for the energy differences between the 4fN6s2, 4fN6s7s, and 4fN6s8s configurations and the difference in the effective quantum numbers of the 4fN6s7s and 4fN6s8s configurations. In Ce i the 4f5d2ns series was used. The results in eV are:

Ce i5.65
Pr i5.42
Nd i5.49
Pm i5.55
Sm i5.63
Eu i5.68
Dy i5.93
Ho i6.02
Er i6.10
Tm i6.18
Yb i6.25.
The uncertainty is estimated to be ±0.02 eV in all cases but Ce i for which the estimated uncertainty is ±0.06 eV. Values for La i and Gd i obtained spectroscopically by other workers are also tabulated. The present results are compared with those obtained by means of surface ionization. The calculated result for Tb i was inconclusive because of the lack of sufficient knowledge of the energy-level structure.

© 1966 Optical Society of America

Full Article  |  PDF Article
Related Articles
Spectrum and energy levels of singly ionized cesium: I. Revision and extension of the Cs ii energy levels

Craig J. Sansonetti and Kenneth L. Andrew
J. Opt. Soc. Am. B 3(3) 386-397 (1986)

Analysis of the third spectrum of dysprosium (Dy iii)

Nissan Spector, Jack Sugar, and Jean-François Wyart
J. Opt. Soc. Am. B 14(3) 511-521 (1997)

Spectra of Doubly and Triply Ionized Ytterbium, Yb iii and Yb iv†

B. W. Bryant
J. Opt. Soc. Am. 55(7) 771-779 (1965)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (3)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (7)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription