CONTRIBUTION TO CYCLOTRON TARGETRY .2. TESTING OF THE TARGET CONSTRUCTION MATERIALS FOR F-18 PRODUCTION VIA NE-20(D, ALPHA)F-18 - RECOVERY OF F-18 FROM VARIOUS METAL-SURFACES

In a previous article(1) we reported results on the distribution of F- 18 activity in the gas target. The present paper continues to report o n experimental studies of physicochemical effects involved in the Ne-2 0(d, alpha)F-18 reaction, with the aim to improve the recovery of F-18 in both chemical forms i.e. Fe-18-F-2 and F-18-F- from the target, wi thout adding fluorine carrier. The choice of optimum target constructi on;on material is a very important factor for achieving a high extract ion rate and high specific activity of the product. Recovery and desor ption of the F-18-activity from the surfaces of various metal foils in the liquid and gas phases have been investigated. This study is of in terest from both the practical and theoretical point of view.