ENTRY 40190 20150625 416940190 0 1 SUBENT 40190001 20150625 416940190 1 1 BIB 10 43 40190 1 2 INSTITUTE (4RUSKUR) 40190 1 3 REFERENCE (J,SJA,30,452,1971) Eng.transl.of AE,30,369,1971 40190 1 4 (J,AE,30,(4),369,1971) Data given 40190 1 5 AUTHOR (N.I.Ivanova,A.N.Kobzev,N.G.Krylov,A.A.Lbov, 40190 1 6 N.P.Martynov,A.E.Trikanov,A.I.Shelamkov) 40190 1 7 TITLE Cross section of the Am-241(n,gamma)Am-242 reaction 40190 1 8 for a neutron spectrum similar to the fission spectrum 40190 1 9 INC-SPECT Neutron spectrum was close to fission spectrum and 40190 1 10 had following energy distribution 40190 1 11 energy (MeV) per-cent 40190 1 12 0 - 0.1 3.8 40190 1 13 0.1-0.4 19.3 40190 1 14 0.4-0.9 26.9 40190 1 15 0.9-1.4 15.0 40190 1 16 1.4-3.0 23.8 40190 1 17 above 3.0 11.2 40190 1 18 SAMPLE ~ 1 mg of Am-241 chloride, alpha-activity ~7.2E+2 40190 1 19 decay/min, gamma-activity ~2.7E+3 quanta/min. 40190 1 20 In quartz cassettes, placed in Cd sheets of 0.5 mm 40190 1 21 thickness. 40190 1 22 With each Cd sheet Au-197 foil of ~2mg - for neutron 40190 1 23 flux control. 40190 1 24 DETECTOR (SCIN) Scintillation plastic detector 53 x 1 mm in size40190 1 25 and an FEU-11B photomultiplier was used to measure 40190 1 26 beta-activity. 40190 1 27 Different registration thresholds, corresponding to 40190 1 28 beta energy ~150-300 keV. 40190 1 29 Calibration by Sr-90 (E-beta 0.54 MeV), Tl( 0.765 MeV),40190 1 30 Au-198( 0.963 MeV). 40190 1 31 Efficiency for Am-242 was 13.7 and 11 % depending from 40190 1 32 threshold value. 40190 1 33 PART-DET (B-) Decay beta 40190 1 34 CORRECTION For background. 40190 1 35 For decay at activation. 40190 1 36 For decay scheme. 40190 1 37 HISTORY (19740117C) Compiled at the centre 40190 1 38 (19750210U) the number of subentry 40190002 corrected 40190 1 39 (20150109A) SD: Updated to new date formats,lower case.40190 1 40 Ref. on Engl.transl. of AE added. REACTION code moved40190 1 41 to Subent 2. DATA-ERR -> ERR-T. ERR-ANALYS updated. 40190 1 42 (20150625A) M.M. Article was checked, BIB information 40190 1 43 was updated. SPA -> FIS. STATUS was added. 40190 1 44 Subents 003,004 ( primarily measured data) were added. 40190 1 45 ENDBIB 43 0 40190 1 46 NOCOMMON 0 0 40190 1 47 ENDSUBENT 46 0 40190 199999 SUBENT 40190002 20150625 416940190 2 1 BIB 5 15 40190 2 2 REACTION (95-AM-241(N,G)95-AM-242-G,,SIG,,FIS) 40190 2 3 Average of six measurements. 40190 2 4 DECAY-DATA (95-AM-242-G,16.01HR) 40190 2 5 ERR-ANALYS (ERR-T) Total error is given, it consists of 40190 2 6 (ERR-1,2.,4.) Uncertainty in activity measurement(2-4%)40190 2 7 (ERR-2) Uncertainty in half-life Am-242 (2%) 40190 2 8 (ERR-3) Error of neutron flux determination (7%) 40190 2 9 (ERR-4) Error of number of atoms in sample (4%) 40190 2 10 (ERR-5) Error of detector efficiency (3%) 40190 2 11 STATUS (TABLE) Table of J,AE,30,(4),369,1971 40190 2 12 (DEP,40190003) In Subent 003 - primarily measured data 40190 2 13 for each of 6 samples. 40190 2 14 HISTORY (20150109A) SD: REACTION code added from Sub.1. 40190 2 15 DECAY-DATA was added. 40190 2 16 (20150625A) M.M. -G wa added in SF4. 40190 2 17 ENDBIB 15 0 40190 2 18 COMMON 4 3 40190 2 19 ERR-2 ERR-3 ERR-4 ERR-5 40190 2 20 PER-CENT PER-CENT PER-CENT PER-CENT 40190 2 21 2. 7. 4. 3. 40190 2 22 ENDCOMMON 3 0 40190 2 23 DATA 3 1 40190 2 24 EN-DUMMY DATA ERR-T 40190 2 25 MEV MB MB 40190 2 26 1. 240. 30. 40190 2 27 ENDDATA 3 0 40190 2 28 ENDSUBENT 27 0 40190 299999 SUBENT 40190003 20150109 416940190 3 1 BIB 10 41 40190 3 2 REACTION 1(95-AM-241(N,G)95-AM-242-G,,SIG,,FIS) 40190 3 3 2(95-AM-241(N,G)95-AM-242-G,,SIG,,FIS) 40190 3 4 3(95-AM-241(N,G)95-AM-242-G,,SIG,,FIS) 40190 3 5 4(95-AM-241(N,G)95-AM-242-G,,SIG,,FIS) 40190 3 6 5(95-AM-241(N,G)95-AM-242-G,,SIG,,FIS) 40190 3 7 6(95-AM-241(N,G)95-AM-242-G,,SIG,,FIS) 40190 3 8 DECAY-DATA (95-AM-242-G,16.01HR,B,667.,,B,625.) 40190 3 9 40.% of 667 keV, 60.% of 625 keV. 40190 3 10 Beta decay - 83.6 %, electron capture (16.4+-0.3)%. 40190 3 11 SAMPLE 1 Am-241 atoms 2.32E+18 40190 3 12 2 1.23E+18 40190 3 13 3 2.06E+18 40190 3 14 4 4.9E+17 40190 3 15 5 1.89E+18 40190 3 16 6 1.22E+17 40190 3 17 DETECTOR (IOCH) Number of Am-241 atoms was defined by 40190 3 18 alpha-activity measurement in integral ionization 40190 3 19 chamber. 40190 3 20 METHOD (ACTIV) Beta activity measurement during 4-5 HL of 40190 3 21 Am-242. 40190 3 22 (CHSEP) Am was separated chemically and purified from 40190 3 23 fission products during 20 hr. 40190 3 24 ANALYSIS CS were calculated to 6 samples as: 40190 3 25 (A*HL)/(N*Q*0.693) , where 40190 3 26 A - absolute Am-242 activity at the end of activation 40190 3 27 taking into account registration efficiency and 40190 3 28 corrections; 40190 3 29 HL - Am-242 half-life; 40190 3 30 N - Am-241 atoms on sample; 40190 3 31 Q - neutron flux. 40190 3 32 MISC-COL (MISC1) Integral flux, neutron/cm2 , measured by fis. 40190 3 33 chambers. 40190 3 34 (MISC2) Am-242 absolute activity, decay/min . 40190 3 35 ERR-ANALYS Total error consists of 40190 3 36 (ERR-1,2.,4.) Uncertainty in activity measurement(2-4%)40190 3 37 (ERR-2) Uncertainty in half-life Am-242 (2%) 40190 3 38 (ERR-3) Error of neutron flux determination (7%) 40190 3 39 (ERR-4) Error of number of atoms in sample (4%) 40190 3 40 (ERR-5) Error of detector efficiency (3%) 40190 3 41 STATUS (TABLE) Table of J,AE,30,(4),369,1971 40190 3 42 HISTORY (20150625C) M.M. 40190 3 43 ENDBIB 41 0 40190 3 44 COMMON 5 3 40190 3 45 EN-DUMMY ERR-2 ERR-3 ERR-4 ERR-5 40190 3 46 MEV PER-CENT PER-CENT PER-CENT PER-CENT 40190 3 47 1. 2. 7. 4. 3. 40190 3 48 ENDCOMMON 3 0 40190 3 49 DATA 18 1 40190 3 50 DATA 1MISC1 1MISC2 1DATA 2MISC1 2MISC2 240190 3 51 DATA 3MISC1 3MISC2 3DATA 4MISC1 4MISC2 440190 3 52 DATA 5MISC1 5MISC2 5DATA 6MISC1 6MISC2 640190 3 53 MB SEE TEXT SEE TEXT MB SEE TEXT SEE TEXT 40190 3 54 MB SEE TEXT SEE TEXT MB SEE TEXT SEE TEXT 40190 3 55 MB SEE TEXT SEE TEXT MB SEE TEXT SEE TEXT 40190 3 56 228. 1.96E+15 7.4E+5 232. 1.96E+15 4.0E+540190 3 57 233. 1.97E+15 6.8E+5 273. 1.97E+15 1.9E+540190 3 58 235. 2.0E+15 6.4E+5 248. 2.0E+15 1.5E+540190 3 59 ENDDATA 9 0 40190 3 60 ENDSUBENT 59 0 40190 399999 SUBENT 40190004 20150625 416940190 4 1 BIB 4 8 40190 4 2 REACTION (79-AU-197(N,G)79-AU-198,,SIG,,FIS) 40190 4 3 METHOD Au-197 capture c-s was measured by plastic scintillator40190 4 4 for checking possible systematic errors in measurement 40190 4 5 method. Obtained value of C-S agrees with value 150mb 40190 4 6 from I.V.Gordeev+,Yaderno-fizicheskie konstanty,M., 40190 4 7 Atomizdat,p.316, 1963 year. 40190 4 8 STATUS (TABLE) Text, page 372 of J,AE,30,(4),369,1971 40190 4 9 HISTORY (20150625C) M.M. 40190 4 10 ENDBIB 8 0 40190 4 11 NOCOMMON 0 0 40190 4 12 DATA 3 1 40190 4 13 EN-DUMMY DATA ERR-T 40190 4 14 MEV MB MB 40190 4 15 1. 140. 15. 40190 4 16 ENDDATA 3 0 40190 4 17 ENDSUBENT 16 0 40190 499999 ENDENTRY 4 0 4019099999999