id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
x920ft86t31	Keith G. Calkins	Absolute Optical Frequency Measurements of the Cesium D1 Transitions and Their Effect on Alpha, The Fine-Structure Constant	2005		.txt	text/plain	343	14	52	Although known precisely via experiments in each subfield, there is disagreement within and between subfields. These new neutral 133Cs 6s2Så_→6p2På_ transition (D1) frequencies, when combined with the 2002 CODATA values of the Rydberg, proton/electron mass ratio, cesium atomic mass, and cesium recoil frequency, provide an almost QED-free value of alpha: αe=1/137.036 0000(11) or 7.7 ppb.	cache/x920ft86t31.txt	txt/x920ft86t31.txt