a micro-pige ( proton-induced gamma-ray emission ) technique based on the delayed 5/2+ -- -- 1/2+ nuclear transition of fluorine ( e gamma = 197 kev , t1/2 = 87 ns ) emitted after 19f ( p , p ' , gamma ) 19f reaction was used to detect and study the distribution of fluorine in the developing enamel organ during pre-eruptive stages , i.e. , the transitional to early maturation stages of enamel formation in neonatal hamsters administered a single ip dose of sodium fluoride ( 20 mg naf/kg body weight ) .
C0016327
fluorine
C0037508
naf