ENTRY 20675 19840127 00002067500000001 SUBENT 20675001 19840127 00002067500100001 BIB 15 43 2067500100002 INSTITUTE (2AUSIRK) 2067500100003 REFERENCE (J,ZP/A,276,(1),75,760128) 2067500100004 AUTHOR (H.FELBER,H.FRIEDMANN) 2067500100005 TITLE -DETERMINATION OF THE CROSS SECTION 14N(N,P)14C FOR 2067500100006 14.7 MEV NEUTRONS BY A MEASUREMENT OF THE ACTIVITY 2067500100007 OF 14C- 2067500100008 FACILITY (CCW ) COCKCROFT-WALTON TYPE ACCELERATOR (200 KEV) OF 2067500100009 THE INSTITUT FUER RADIUMFORSCHUNG UND KERNPHYSIK OF 2067500100010 THE UNIVERSITY OF VIENNA. 2067500100011 INC-SOURCE (D-T ) THE REACTION T(D,N)4HE PRODUCES 14.7 MEV 2067500100012 NEUTRONS IN A TRITIUM-TARGET,BLANKETED ON TITANIUM. 2067500100013 SAMPLE .NATURAL NITROGEN AS UREA-COMPOUND (NH2CONH2) (15G). 2067500100014 METHOD (ACTIV) THE ACTIVITY OF THE BETA-DECAY OF C14 TO N14 2067500100015 WAS MEASURED AFTER IRRADIATION. 2067500100016 DETECTOR (PROPC) LOW-LEVEL PROPORTIONAL COUNTER WAS USED 2067500100017 (HOUTERMANS-OESCHGER TYPE TUBE). 2067500100018 .SUPRESSION OF COSMIC RAY COMPONENT BY SHIELDING 2067500100019 (24T IRON). 2067500100020 .SUPRESSION OF MESON COMPONENT BY ANTICOINCIDENCE 2067500100021 WITH A MULTI-WIRE SHIELDING COUNTER ASSEMBLY. 2067500100022 .EFFICIENCY WAS DETERMINED BY USING OXALIC ACID 2067500100023 STANDARD, SUPPLIED BY NBS(10.96+-0.03 COUNTS/MIN.). 2067500100024 MONITOR .REACTION CROSS SECTION FOR 27AL(N,ALPHA)24NA. 2067500100025 .FOR DETAILS SEE H.FRIEDMANN S THESIS,1975. 2067500100026 COMMENT .AGREEMENT WITH PREVIOUS DATA NOT ACHIEVED (J.CSIKAI 2067500100027 AND S.NAGY,NP A91,222(1967)).STATISTICAL MODEL 2067500100028 CALCULATIONS OF CROSS SECTION AND EXCITATION 2067500100029 FUNCTION CARRIED OUT.REASONABLE AGREEMENT WITH THE 2067500100030 PRESENTED EXPERIMENTAL DATA OF THE CROSS SECTION. 2067500100031 STATUS .14N(N,P)14C CROSS SECTION AT 14.7 MEV TAKEN FROM 2067500100032 REFERENCE. 2067500100033 HISTORY (761012C) 2067500100034 (770504E) 2067500100035 CORRECTION .FOR SCATTERED NEUTRONS FROM THE ACCELERATOR ROOM, 2067500100036 FROM THE TARGET CONSTRUCTION AND FROM D(D,N)3HE 2067500100037 REACTIONS.DETAILS SEE H.FRIEDMANN,THESIS,VIENNA 2067500100038 1975. 2067500100039 ERR-ANALYS .ERROR INCLUDES THE MEAN OF THE UNCERTAINTIES OF THE 2067500100040 FOLLOWING CONTRIBUTIONS- 2067500100041 STATISTICAL UNCERTAINTIES,BACKGROUND,EFFICIENCY 2067500100042 (DETERMINED BY THE UNCERTAINTY IN THE OXALIC ACID 2067500100043 STANDARD),PHYSICAL CONSTANTS,FLUX DETERMINATION, 2067500100044 CORRECTION FOR SCATTERED NEUTRONS. 2067500100045 ENDBIB 43 0 2067500100046 NOCOMMON 0 0 2067500100047 ENDSUBENT 46 0 2067500199999 SUBENT 20675002 19840127 00002067500200001 BIB 2 3 2067500200002 REACTION (7-N-14(N,P)6-C-14,,SIG) 2067500200003 HISTORY (761012C) 2067500200004 (770504E) 2067500200005 ENDBIB 3 0 2067500200006 NOCOMMON 0 0 2067500200007 DATA 4 1 2067500200008 EN EN-ERR DATA DATA-ERR 2067500200009 MEV MEV MB MB 2067500200010 1.4700E+01 1.0000E-01 3.8000E+01 3.0000E+00 2067500200011 ENDDATA 3 0 2067500200012 ENDSUBENT 11 0 2067500299999 ENDENTRY 2 0 2067599999999