ENTRY 30398 20090105 31343039800000001 SUBENT 30398001 20090105 31343039800100001 BIB 14 33 3039800100002 INSTITUTE (3BULBLA) 3039800100003 (2GERZFK) 1st author's address. 3039800100004 REFERENCE (J,KE,20,(1),23,197701) in German. 3039800100005 (J,IP,13,(1),15,197701) Detail of method, in German. 3039800100006 AUTHOR (G.Pfrepper,M.Michailov,C.Raitshev) 3039800100007 TITLE -Determination of the cross section of K-41(n,a)Cl-38 3039800100008 for fission neutrons.- 3039800100009 FACILITY (REAC,3BULBLA) 3039800100010 INC-SOURCE (REAC) IRT-1000 Research Reactor at Institut fuer Kern-3039800100011 forschung U. Kernenergetik in Sofia. 3039800100012 n-flux = 4. x 10**12 n/s/cm2. 3039800100013 INC-SPECT The ratio of thermal and fast component in the neutron 3039800100014 flux was determined to be ' 5.4 ' using the reaction of3039800100015 S-32(n,p)P-32 (=69 mb for fission neutrons) and 3039800100016 P-31(n,g)P-32(=190mb for thermal neutrons) and their 3039800100017 Cd-ratios. 3039800100018 SAMPLE K(2)-SO(4) or K-NO(3),100 to 150mg, used together with 3039800100019 NH(4)-Cl as the standard sample. 3039800100020 METHOD (CHSEP,MOMIX) 3039800100021 K(2)-SO(4) or K-NO(3) was irradiated together with 3039800100022 NH(4)-Cl as chlorine standard in the neutron flux 90min3039800100023 after radiochemical separation of Cl-38 from KNO(3) and3039800100024 K(2)-SO(4), 1.64- and 2.17-MeV gamma peaks from Cl-38 3039800100025 was measured by Ge(Li) detector. 3039800100026 DETECTOR (GELI) 18 cm3 Ge(Li) detector with DIDAC 4000 multi- 3039800100027 channel analyzer. 3039800100028 PART-DET (DG) Decay gamma of 1.64 and 2.17 MeV from Cl-38. 3039800100029 STATUS (APRVD) Approved by Pfrepper(through Seeliger,78/04/25)3039800100030 HISTORY (19770701C) KO.- 3039800100031 (19790925U) KO.-'Aprvd' added.- 3039800100032 (20090115A) BIB section updated 3039800100033 ERR-ANALYS (DATA-ERR) Standard deviation of the mean value of 10 3039800100034 different experimental runs. 3039800100035 ENDBIB 33 0 3039800100036 NOCOMMON 0 0 3039800100037 ENDSUBENT 36 0 3039800199999 SUBENT 30398002 20090105 31343039800200001 BIB 6 16 3039800200002 REACTION (19-K-41(N,A)17-CL-38,,SIG,,FIS) 3039800200003 ANALYSIS For detail see G.Pfrepper in 'Isotopenpraxis',13(1977)3039800200004 15. 3039800200005 Cadmium ratios for Cl-37(n,g)Cl-38 and for K-41(n,a) 3039800200006 Cl-38 were determined to be 97.7 and 1, respectively. 3039800200007 MONITOR ((MONIT1)17-CL-37(N,G)17-CL-38,,SIG,,MXW) = 430 mb. 3039800200008 ((MONIT2)16-S-32(N,P)15-P-32,,SIG,,FIS) = 69 mb. 3039800200009 ((MONIT3)15-P-31(N,G)15-P-32,,SIG,,MXW) = 190 mb. 3039800200010 .S-32(n,p)P-32 and P-31(n,g)P-32 reactions were used 3039800200011 for determination of flux ratio of thermal and fission 3039800200012 neutrons. 3039800200013 MONIT-REF ((MONIT1),R.Sher,R,IAEA-156,1,1974) 3039800200014 ((MONIT2),A.Fabry,R,BLG-465,1972) 3039800200015 ((MONIT3),R.Sher,R,IAEA-156,1,1974) 3039800200016 DECAY-DATA (17-CL-38,37.2MIN,DG,1640.,,DG,2170.) 3039800200017 STATUS (TABLE) Data taken from Kernenergie,20(1)(1977)23. 3039800200018 ENDBIB 16 0 3039800200019 COMMON 3 3 3039800200020 MONIT1 MONIT2 MONIT3 3039800200021 MB MB MB 3039800200022 4.3000E+02 6.9000E+01 1.9000E+02 3039800200023 ENDCOMMON 3 0 3039800200024 DATA 3 1 3039800200025 EN-DUMMY DATA DATA-ERR 3039800200026 MEV MB MB 3039800200027 2.0000E+00 6.6200E-01 2.6000E-02 3039800200028 ENDDATA 3 0 3039800200029 ENDSUBENT 28 0 3039800299999 ENDENTRY 2 0 3039899999999