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Titolo:
ATOMIC SPECTRA AND INSTABILITIES OF VALENCE
Autore:
CONNERADE JP;
Indirizzi:
UNIV LONDON IMPERIAL COLL SCI & TECHNOL,BLACKETT LAB,PRINCE CONSORT RD LONDON SW7 2BZ ENGLAND
Titolo Testata:
Journal of alloys and compounds
fascicolo: 2, volume: 227, anno: 1995,
pagine: 145 - 153
SICI:
0925-8388(1995)227:2<145:ASAIOV>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPECTROSCOPY; IONIZATION; ELEMENTS; COLLAPSE;
Keywords:
VALENCE; INSTABILITY; ATOMIC SPECTRA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
16
Recensione:
Indirizzi per estratti:
Citazione:
J.P. Connerade, "ATOMIC SPECTRA AND INSTABILITIES OF VALENCE", Journal of alloys and compounds, 227(2), 1995, pp. 145-153

Abstract

The concept of valence is discussed in relation to recent studies of the subvalence spectra of free atoms. It is argued that valence can beprofoundly modified by accidental degeneracies which occur as a result of centrifugal barrier effects. Examples of ''atomic hybridisation''are given, and their effects on observed spectra are discussed. Another kind of valence change occurs when a radial wavefunction is poised on the verge of orbital collapse. An example is given where a change of valence can be triggered in an atomic cluster by varying the clustersize. The origin of the effect is traced to properties of the inner short-range well in the effective atomic potential when the centrifugalterm is included. It is concluded that more account needs to be takenof the underlying atomic effects and especially radial properties when setting up theories of valence for transition elements.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 12:40:19