The Strontium II and Barium II Spectra

Saunders, F. A.; Schneider, E. G.; Buckingham, Emily

doi:10.1073/pnas.20.5.291

Cited by 9 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…39 Wavelengths for Ba II are in Table 4. They include wavelengths observed in emission by Karlsson and Litzén, 2 Saunders et al, 37 and Rasmussen. 36 Intensities are given for lines observed by Karlsson and Litzén, who noted the anamolous intensities of lines observed by Rasmussen.…”

Section: Ba IImentioning

confidence: 99%

Compilation of Wavelengths, Energy Levels, and Transition Probabilities for Ba I and Ba II

Curry

2004

Journal of Physical and Chemical Reference Data

View full text Add to dashboard Cite

Energy levels, wavelengths, and transition probabilities for the first and second spectra of barium, Ba I and Ba II, have been compiled. Wavelengths of observed transitions and energy levels derived from those wavelengths have been obtained from a critical evaluation of the available literature. Measured and calculated transition probabilities for some of the observed transitions have been obtained from the recent compilation of Klose et al.

show abstract

Section: Ba IImentioning

confidence: 99%

Compilation of Wavelengths, Energy Levels, and Transition Probabilities for Ba I and Ba II

Curry

2004

Journal of Physical and Chemical Reference Data

View full text Add to dashboard Cite

show abstract

“…Bimodal solutions were first found to occur naturally in the nf series of Ba + by Connerade and Mansfield (1975). They were shown to account for an anomalous variation of the quantum defect which had initially been described by Saunders et al (1934) as a perturbation of a novel type, but had never properly been accounted for. Another important aspect of bimodal solutions is the ease with which the self-consistent field procedure may 'flip' from one solution to another, leading to ambiguities in the interpretation of Koopman's theorem.…”

Section: Introductionmentioning

confidence: 99%

Controlling orbital collapse from inside and outside a transition element

Connerade

Dolmatov

1998

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

We report a study of bimodal behaviour of atomic wavefunctions for a transition element (Cr) and how this behaviour can be controlled and even turned into single-mode character either by (i) varying the effective nuclear charge for nonintegral values, or (ii) placing the atom in a spherical cavity of adjustable radius. Our conclusions have relevance to the emergence of valence instabilities for transition metals in the solid state. Also it is shown that the very existence of the bimodal wavefunctions provides an explanation for the frequently experienced instability of self-consistent field algorithms when a double-valley potential occurs, and suggestions are made on how to improve the numerical procedure for such calculations.

show abstract

“…I now turn to an experimental effect originally noticed by Saunders et al a very long time ago [5] based on experiments by Rasmussen [6]. What they realized was that there exists, in the nf Rydberg series of Ba + , a very unusual perturbation, despite the absence of any plausible perturber in the vicinity.…”

Section: Discussionmentioning

confidence: 85%