PRODUCTION OF F-18 BY MEANS OF PHOTO-NUCLEAR REACTIONS AND PREPARATION OF ANHYDROUS-H F-18

Fluorine-18 is the only radioisotope of fluorine with long enough half-life for practical uses as a tracer. In the studies described here the production rates of **1**8F by the photonuclear reactions were determined at energies between 30 and 60 Mev in order to study fundamentally the larger scale production of carrier-free or non-carrier-free **1**8F. In addition, a production method of anhydrous H**1**8F with a high specific activity was also studied to prepare some fluorinated compounds labeled with **1**8F.