Title :
Measurement of h/MRb with ultracold atoms
Author :
Battesti, R. ; Clade, P. ; Schwob, C. ; Gremaud, B. ; Guellati, Souad ; Nez, F. ; Julien, L. ; Biraben, F.
Author_Institution :
Lab. Kasller Brorrel, Ecole Normale Superieure, CNRS, Paris, France
Abstract :
We present the development of a new experiment with ultracold atoms. Its purpose is to measure the atomic recoil frequency shift of photons absorbed or emitted by an atom. One can deduce the ratio h/MRb Rb between the Planck constant and the mass of the atom, leading to the determination of the fine structure constant (α).
Keywords :
constants; current comparators; measurement by laser beam; measurement standards; power measurement; sensors; Avogadro constant; Josephson DC voltage; Watt balances; cryogenic current comparators; fountains; frequency standards; fundamental constants; high voltage measurements; lasers; power measurements; quantum Hall resistance; sensors; single electron tunneling; time standards; voltage scaling; Atom lasers; Atom optics; Atomic beams; Atomic measurements; Cooling; Electrons; Gravity; Neutrons; Optical interferometry; Stimulated emission;
Conference_Titel :
Precision Electromagnetic Measurements, 2002. Conference Digest 2002 Conference on
Conference_Location :
Ottawa, Ontario, Canada
Print_ISBN :
0-7803-7242-5
DOI :
10.1109/CPEM.2002.1034844
