ENTRY 22719 20011118 00002271900000001 SUBENT 22719001 20011118 00002271900100001 BIB 10 28 2271900100002 TITLE Measurement of 14N(n,p)14C cross section for kT=25.3keV2271900100003 Maxwellian neutrons useing gridded ionization chamber 2271900100004 AUTHOR (T.SANAMI,M.BABA,I.MATSUYAMA,S.MATSUYAMA,T.KIYOSUMI, 2271900100005 Y.NAUCHI,N.HIRAKAWA) 2271900100006 INSTITUTE (2JPNTOH) 2271900100007 REFERENCE (J,NIM/A,394,368,1997) 2271900100008 INC-SOURCE (P-LI7) Neutrons were produced by bombarding a thick 2271900100009 7Li target with a proton beam whose energy Ep=1.912 MeV2271900100010 is above the reaction threshold of the 7Li(p,n)7Be. 2271900100011 The thick 7Li target as prepared by evaporating 2271900100012 metallic Li on a Pt plate in a Cu target assembly 2271900100013 which has 10 mm diam. The target was cooled by an 2271900100014 air-jet during the experiment. 2271900100015 SAMPLE The 14N sample was a thin melamine film (C3H6N6) 2271900100016 prepared by vacuum evaporation on a 0.01 mm thick 2271900100017 Al foil. From weight of the sample, its thickness was 2271900100018 determined to 212+-1.2mu-g/cm2. 2271900100019 MONITOR (3-LI-6(N,T)2-HE-4,,SIG) To measure the neutron 2271900100020 flux on the melamine sample, it was replaced with a 2271900100021 6LiF film which was evaporated on an Al foil 2271900100022 (0.01 mm) and 289+-1.2mu-g/cm2 thick. 2271900100023 An unevaporated Al foil was used for background 2271900100024 measurement. 2271900100025 DETECTOR (IOCH) The gridded ionization chamber was filled with 2271900100026 Ar+2.5%CO2 as a counter gas. The gas pressure was 2271900100027 7.8x10**4Pa (0.8kgf/cm2). 2271900100028 FACILITY (DYNAM) 2271900100029 HISTORY (20011102C) 2271900100030 ENDBIB 28 0 2271900100031 NOCOMMON 0 0 2271900100032 ENDSUBENT 31 0 2271900199999 SUBENT 22719002 20011118 00002271900200001 BIB 2 2 2271900200002 REACTION (7-N-14(N,P)6-C-14,,SIG,,MXW) 2271900200003 ERR-ANALYS (DATA-ERR) Statistical and systematic errors 2271900200004 ENDBIB 2 0 2271900200005 NOCOMMON 0 0 2271900200006 DATA 3 1 2271900200007 KT DATA DATA-ERR 2271900200008 KEV MB MB 2271900200009 25.00 1.700 0.8000E-01 2271900200010 ENDDATA 3 0 2271900200011 ENDSUBENT 10 0 2271900299999 ENDENTRY 2 0 2271999999999