ENTRY B0151 20011220 20020122 B015100000001 SUBENT B0151001 20011220 20020122 B015100100001 BIB 6 11 B015100100002 TITLE Yield and Production of F-18 by He-3 Irradiation of B015100100003 Water. B015100100004 AUTHOR (J.FITSCHEN, R.BECKMANN, U.HOLM, H.NEUERT) B015100100005 INSTITUTE (2GERHAM) Institut Fuer Experimentalphysik. B015100100006 REFERENCE (J,ARI,28,781,1977) B015100100007 FACILITY (ISOCY,2GERHAM) B015100100008 HISTORY (19800625C)Lane B015100100009 (19940727A) Some Corrections have Been Included by B015100100010 CAJAD B015100100011 (19981124A) Converted to Lower Case. B015100100012 (20011010U) Last checking has been done. B015100100013 ENDBIB 11 0 B015100100014 NOCOMMON 0 0 B015100100015 ENDSUBENT 14 0 B015100199999 SUBENT B0151002 20011220 20020122 B015100200001 BIB 11 55 B015100200002 REACTION 1(8-O-16(HE3,P)9-F-18,CUM,SIG,,,EXP) B015100200003 2(8-O-16(HE3,P)9-F-18,CUM,TTY,,,EXP) B015100200004 RAD-DET (9-F-18,AR) B015100200005 DECAY-DATA (9-F-18,109.87MIN,AR,511.,0.97) B015100200006 METHOD (EXTB,BCINT) B015100200007 (ACTIV) B015100200008 1(EXTB,STTA,EDEG,BCINT) B015100200009 Energy Degradation was Calculated According to B015100200010 C.F.Williamson Et Al.,Cea-R 3042(1966). B015100200011 Irradiation Times were About 80 Min.Decay Curves and B015100200012 Activities of All Foils of One Stack were Measured B015100200013 Simultaneously Using an Automatic Sample Changer. B015100200014 2(EXTB,SITA,BCINT) B015100200015 SAMPLE 1Stack of Foils Composed of Five Sets. Each Set was MadeB015100200016 Of Three Mylar Foils Each 11.7+-0.2 Micrometer Thick B015100200017 And of One Al-Foil For Energy Degradation, Thickness B015100200018 27.3 Micrometer. The Outer Mylar Foils Served As RecoilB015100200019 Catchers, the Middle Foil was the Target with Oxygen B015100200020 Of Natural Isotopic Composition. B015100200021 2Water Kept in a Cylindrical Water Cooled Titanium B015100200022 Cavity, 50 mm in Diameter and 2 mm Thick. The Beam B015100200023 Entered Through a 15 Micrometer Tantal Foil in Front B015100200024 Of the Cylinder. During Bombardment the Water is B015100200025 Decomposed Into Hydrogen and Oxygen. To Avoid B015100200026 Overpressure a Small Vessel Filled with Palladium was B015100200027 Connected to the Target Which Acts As a Catalist to B015100200028 Reform the Water. B015100200029 DETECTOR 1(COIN,NAICR,NAICR) B015100200030 2(GELI) B015100200031 ANALYSIS (DECAY) B015100200032 CORRECTION1The Coincidence Rates have Been Corrected For B015100200033 Background Radiation, Random Coincidences and Dead B015100200034 Times. B015100200035 COMMENT 1The Strongest Impurity (C-11,HALF-LIVE = 20.3 MIN) B015100200036 After Four Hours was 0.5% of the F-18 Activity. B015100200037 2Small Impurities of C-11, N-13 and be-7 were Produced. B015100200038 After an Irradiation Time of 3 Hours the Ratio of be-7 B015100200039 To F-18 is 2.5E-4. C-11 and N-13 are Permissible For B015100200040 Medical Use Because of Their Short Half-Lives. These B015100200041 Possible Activities Should be Much Less Than B015100200042 1 Nanocurie. B015100200043 ERR-ANALYS1(ERR-T) The Error Given is the Total Error. It IncludesB015100200044 The Following Uncertainties - Beam Current - 0.4%, B015100200045 Detection Probability-2.7%, Number of Target B015100200046 Nuclei-1.2%, Determination of the Initial Activities byB015100200047 Fitting the Decay Curves-2.3 to 5.1% Including B015100200048 Statistics in the Counting Rates. B015100200049 The Following Uncertainties Contribute to the Error B015100200050 Of Energy- Uncertainty of the Primary Beam Energy B015100200051 -0.2%, Thickness Spreads of the Preceding Foils-2% B015100200052 Each, Air Distances 2.To 4.%. B015100200053 2Information is Missing. B015100200054 STATUS 2(CURVE) By Kachapag B015100200055 Yield Given in Dps/Microampere was Converted Into B015100200056 Microcurie/Microampere by the Compiler of Kachapag. B015100200057 ENDBIB 55 0 B015100200058 NOCOMMON 0 0 B015100200059 DATA 4 19 B015100200060 EN DATA 1ERR-T 1DATA 2 B015100200061 MEV MB MB MUCI/MUA B015100200062 7.7 5500. B015100200063 9.8 11200. B015100200064 13.9 135.9 6.5 B015100200065 14.3 19400. B015100200066 17.1 87.7 4. B015100200067 19.9 61.2 2.9 B015100200068 20. 25300. B015100200069 22.4 50.8 2.3 B015100200070 24.7 43.3 2. B015100200071 26.9 36.9 1.6 B015100200072 28.9 32.5 1.4 B015100200073 29.9 32400. B015100200074 31.6 29. 1.2 B015100200075 33.6 26.8 1.1 B015100200076 35.6 23.9 1.1 B015100200077 37.2 22.7 1.1 B015100200078 38.8 20.8 1.1 B015100200079 40. 37300. B015100200080 40.3 20.5 1.2 B015100200081 ENDDATA 21 0 B015100200082 ENDSUBENT 81 0 B015100299999 ENDENTRY 2 0 B015199999999