ENTRY B0095 20011220 0000B009500000001 SUBENT B0095001 20011220 0000B009500100001 BIB 8 36 B009500100002 TITLE Absolute Cross Section For the C-12(P,PN)C-11 Reaction B009500100003 At 50 MeV B009500100004 AUTHOR (J.B.CUMMING) B009500100005 INSTITUTE (1USABNL).Chemistry Department B009500100006 REFERENCE (J,NP,49,417,1963) B009500100007 FACILITY (LINAC,1USABNL) B009500100008 METHOD (EXTB,BCINT,SITA,EDEG) B009500100009 Stacks of Several Target Foils were Used, Where the B009500100010 Outermost Foils Served to Compensate For Recoil Losses,B009500100011 The Inner Ones to Evaluate Nonuniformity. Energy B009500100012 Degradation was Performed by Means of Cu-Discs of KnownB009500100013 Thicknesses. Though It is not Explicitly Stated, the B009500100014 Compiler Assumes That Only One Data Point was Obtained B009500100015 Per Irradiation and not Data For Several Energies from B009500100016 One Single Stack (COMMENT BY THE COMPILER). B009500100017 Energy Degradation For Copper and Aluminium was B009500100018 Calculated According to H.Bichsel, Linear Accelerator B009500100019 Group, Dept. Of Physics, Technical Report 2, Univ.Of B009500100020 Southern California (1961). B009500100021 For Polyethylene, Carbon-Data of Sternheimer, Phys.Rev.B009500100022 115,137(1959) And Author'S Own Hydrogen Data were B009500100023 Combined Assuming Additivity. B009500100024 When Calculating Cross Sections at the B009500100025 Reduced Energies, Corrections For the Loss of Protons B009500100026 By Nuclear Interactions have Been Made with an Assumed B009500100027 Cross Section of 1 Barn For Copper. B009500100028 The Faraday Cup was Attached Directly to the End of B009500100029 The Beam Pipe Without Using a Foil Window For B009500100030 Separation. This Avoided Erroneous Results by EnergeticB009500100031 Knock on Electrons. B009500100032 DETECTOR (NAICR) Well Crystal B009500100033 HISTORY (19780419C)Lakw B009500100034 (19940711A) Some Corrections have Been Included by B009500100035 CAJAD B009500100036 (19980611A) Some Reactions are Corrected. Lower Case. B009500100037 (20011010U) Last checking has been done. B009500100038 ENDBIB 36 0 B009500100039 NOCOMMON 0 0 B009500100040 ENDSUBENT 39 0 B009500199999 SUBENT B0095002 20011220 0000B009500200001 BIB 7 27 B009500200002 REACTION (6-C-12(P,X)6-C-11,IND,SIG,,,EXP) B009500200003 RAD-DET (6-C-11,AR) B009500200004 DECAY-DATA (6-C-11,,AR).Data are Missing (COMMENT BY THE COMPILER)B009500200005 SAMPLE Stack Consisting of 4 Polyethylene Foils, Thickness B009500200006 About 10 Mg/Cm**2, Determined by Weighing Each Single B009500200007 Foil and of Cu-Discs For Energy Reduction. B009500200008 See Also Under Method. B009500200009 CORRECTION The Activities Measured were Corrected For a 12+-2% B009500200010 Loss of C-11 by Diffusion. No Corrections For the 1.1% B009500200011 Abundance of C-13 were Made. The Production of C-11 by B009500200012 Secondary Neutrons Via (N,2N) Reaction was Negligible B009500200013 As Experimentally Shown. The Correction For N-13 B009500200014 Produced by C-13(P,N) Reaction was Estimated to be B009500200015 Always Less Than 0.1 Mb from the Peak Cross Section of B009500200016 The C-13(P,N) Reaction, the Small Natural C-13 B009500200017 Abundance, and the Faster Decay of N-13 in Respect to B009500200018 C-11. B009500200019 ERR-ANALYS (EN-ERR) Resulting from a +-0.5 MeV Uncertainty in the B009500200020 Energy of the Incident Beam. B009500200021 (ERR-T) Standard Error Which Includes an Estimated B009500200022 C-11 Counting Efficiency (1.5), Accuracy of the CurrentB009500200023 Integrator and Faraday Cup (1.5), Absolute Value of B009500200024 The C-11 Gas Loss of the Foil (2.). The Numbers in B009500200025 Parentheses are % Values Valid For the Cross Section atB009500200026 50.5 MeV. B009500200027 FLAG (1.) This Value is the Average of Seven Measurements B009500200028 At Proton Energies Between 50.1 and 51.2 MeV B009500200029 ENDBIB 27 0 B009500200030 NOCOMMON 0 0 B009500200031 DATA 5 9 B009500200032 EN EN-ERR DATA ERR-T FLAG B009500200033 MEV MEV MB MB NO-DIM B009500200034 20.7 1. 38. 1.3 B009500200035 21.1 1. 32.9 1.1 B009500200036 30.1 89.1 3. B009500200037 33.3 92.5 3.1 B009500200038 37.7 90. 3. B009500200039 42. 89.4 3. B009500200040 42.8 91. 3. B009500200041 44.2 88.8 3. B009500200042 50.5 86.4 2.6 1. B009500200043 ENDDATA 11 0 B009500200044 ENDSUBENT 43 0 B009500299999 SUBENT B0095003 20011220 0000B009500300001 BIB 6 17 B009500300002 REACTION (13-AL-27(P,X)11-NA-24,CUM,SIG,,,EXP) B009500300003 RAD-DET (11-NA-24-G,DG) B009500300004 DECAY-DATA (11-NA-24-G,,DG) Data are Missing; Comment by Compiler B009500300005 Of Kachapag. B009500300006 (11-NA-24-M,20.E-3SEC) About 100% Isomeric Transition;B009500300007 Comment by the Compiler of Kachapag B009500300008 SAMPLE Al-Foils, Thickness 0.07 mm, Purity 99.99%. B009500300009 CORRECTION A Substantial Contribution to the Na-24 Production by B009500300010 Secondary Neutrons Via the (N,A)-Reaction Could be B009500300011 Observed. Therefore the Cross Sections have Been B009500300012 Reduced by 0.5+-0.3 Mb to Correct For this Effect. B009500300013 ERR-ANALYS (ERR-T) Standard Error Compounded from the B009500300014 Statistical Error, a 1.5% Absolute Accuracy of the B009500300015 Current Integration and a +-1.5 Per Cent Uncertainty inB009500300016 The Counting Efficiency. B009500300017 The Major Source of Error is the Somewhat Uncertain B009500300018 Correction For the (N,ALPHA) Reaction. B009500300019 ENDBIB 17 0 B009500300020 NOCOMMON 0 0 B009500300021 DATA 3 4 B009500300022 EN DATA ERR-T B009500300023 MEV MB MB B009500300024 37.4 0.9 0.3 B009500300025 44.1 2.8 0.3 B009500300026 50.1 6.2 0.3 B009500300027 50.6 6.5 0.3 B009500300028 ENDDATA 6 0 B009500300029 ENDSUBENT 28 0 B009500399999 SUBENT B0095004 20011220 0000B009500400001 BIB 6 13 B009500400002 REACTION (13-AL-27(P,X)11-NA-22,CUM,SIG,,,EXP) B009500400003 RAD-DET (11-NA-22,DG) B009500400004 DECAY-DATA (11-NA-22,,DG) Since Only Events Above 0.6 MeV were B009500400005 Measured, a Contribution of the Annihilation Radiation B009500400006 Can be Excluded. No Further Details are Given (COMMENT B009500400007 BY THE COMPILER OF KACHAPAG) B009500400008 SAMPLE Al-Foils, Thickness 0.07 mm, Purity 99.99%. B009500400009 COMMENT As Shown Experimentally Secondary Particles do not B009500400010 Contribute Appreciably to the Production of Na-22 B009500400011 ERR-ANALYS (ERR-T) Standard Error Compounded from the B009500400012 Statistical Error, a 1.5% Absolute Accuracy of the B009500400013 Current Integration and a +-2% Uncertainty in the B009500400014 Counting Efficiency. B009500400015 ENDBIB 13 0 B009500400016 NOCOMMON 0 0 B009500400017 DATA 3 5 B009500400018 EN DATA ERR-T B009500400019 MEV MB MB B009500400020 29.7 2.4 0.2 B009500400021 37.4 34.2 0.9 B009500400022 44.1 46.8 1.2 B009500400023 50.1 38.4 1. B009500400024 50.6 36.4 3.6 B009500400025 ENDDATA 7 0 B009500400026 ENDSUBENT 25 0 B009500499999 ENDENTRY 4 0 B009599999999