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Cesium

Dit artikel is gesjreve (of begós) in 't Mofers. Laes hie wie v'r mit de versjillende saorte Limburgs ómgaon.


Cesium.

Cesium of caesium is e sjemisch element mit es symboeal Cs en 't atoeamnómmer 55. 't Is e zilver- toet góldkluuerig alkalimetaal.

Toepassinge

[bewirk | brón bewèrke]

Cesium wuuertj toegepas in atoeamklokke. Saer 1967 wuuertj de sekónd in 't SI-stèlsel gediffenieerdj es 9.192.631.770 cycli vanne straoling die huuertj biejen euvergank tösse twieë enerzjietoestenj (ground state hyperfine splitting frequency) vannen isotoeap 133Cs bie 't absoluut nólpuntj.

Isotoeape

[bewirk | brón bewèrke]
Stabielste isotoeape
Iso RA (%) Halveringstied VV VE (MeV) VP
133Cs 100 stabiel mit 78 neutrone
134Cs syn 2,0648 j β- 2,059 134Ba
135Cs syn 2,3·106 j β- 5,400 135Ba
137Cs syn 30,07 j β- 1,176 137Ba

Veerendertig isotoeape van cesium zeen bekèndj (mit 'n atoeammassa van 112 toet 145); det is 't meiste van alle elemente. Aevel kump inne netuur slechs eine stabielen isotoeap veur: 133Cs. De radioactieven isotoeap 137Cs wuuertj gebroek in hydrologisch óngerzeuk, analoog aan 't gebruik van tritium. 137Cs óntsteitj bie nucleair explosies en wuuertj ouch gevörmp in kerncentrales.

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Cesium
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