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Search for variations of fundamental constants using atomic fountain clocks.
Marion, H; Pereira Dos Santos, F; Abgrall, M; Zhang, S; Sortais, Y; Bize, S; Maksimovic, I; Calonico, D; Grünert, J; Mandache, C; Lemonde, P; Santarelli, G; Laurent, Ph; Clairon, A; Salomon, C.
Afiliação
  • Marion H; BNM-SYRTE, Observatoire de Paris, 61 Avenue de l'Observatoire, 75014 Paris, France.
Phys Rev Lett ; 90(15): 150801, 2003 Apr 18.
Article em En | MEDLINE | ID: mdl-12732023
Over five years, we have compared the hyperfine frequencies of 133Cs and 87Rb atoms in their electronic ground state using several laser-cooled 133Cs and 87Rb atomic fountains with an accuracy of approximately 10(-15). These measurements set a stringent upper bound to a possible fractional time variation of the ratio between the two frequencies: d/dt ln([(nu(Rb))/(nu(Cs))]=(0.2+/-7.0)x 10(-16) yr(-1) (1sigma uncertainty). The same limit applies to a possible variation of the quantity (mu(Rb)/mu(Cs))alpha(-0.44), which involves the ratio of nuclear magnetic moments and the fine structure constant.
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Base de dados: MEDLINE Idioma: En Ano de publicação: 2003 Tipo de documento: Article
Buscar no Google
Base de dados: MEDLINE Idioma: En Ano de publicação: 2003 Tipo de documento: Article