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AC 227 [1 record]
Record 1 - internal organization data 2001-01-12
Record 1, English
Record 1, Subject field(s)
- Chemistry
- Atomic Physics
Record 1, Main entry term, English
- actinium 227
1, record 1, English, actinium%20227
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- actinium-227 2, record 1, English, actinium%2D227
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Actinium-227, a decay product of uranium-235, is a beta emitter with a 21.6-year half-life. Its principal decay products are thorium-227 ..., radium-223 ..., and a number of short-lived products including radon, bismuth, polonium, and lead isotopes. In equilibrium with its decay products, it is a powerful source of alpha rays. 2, record 1, English, - actinium%20227
Record 1, Key term(s)
- Ac 227
- Ac-227
Record 1, French
Record 1, Domaine(s)
- Chimie
- Physique atomique
Record 1, Main entry term, French
- actinium 227
1, record 1, French, actinium%20227
correct, masculine noun
Record 1, Abbreviations, French
- Ac 227 2, record 1, French, Ac%20227
correct
Record 1, Synonyms, French
- actinium-227 3, record 1, French, actinium%2D227
correct, masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Radioélément de période d'une durée de 21,6 ans. 4, record 1, French, - actinium%20227
Record number: 1, Textual support number: 1 CONT
Dès le début de son séjour au laboratoire Curie, Marguerite Perey avait été amenée à étudier un élément encore peu connu, l'actinium 227. Ce radioélément naturel accompagne toujours les terres rares dont il est très difficile à séparer en raison de l'analogie des propriétés chimiques. [...] Elle découvre [...] une faible anomalie dans l'évolution de l'activité P de l'actinium fraîchement purifié de ses descendants. Le rayonnement P de l'actinium 227 a une énergie si faible qu'il n'avait jamais été observé et le descendant immédiat, le thorium 237, ne devait se former qu'avec une période d'une vingtaine de jours. 5, record 1, French, - actinium%20227
Record number: 1, Textual support number: 1 OBS
On le trouve à l'état naturel. 4, record 1, French, - actinium%20227
Record 1, Key term(s)
- Ac-227
Record 1, Spanish
Record 1, Textual support, Spanish
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