ENTRY 40190 20150625 41694019000000001 SUBENT 40190001 20150625 41694019000100001 BIB 10 43 4019000100002 INSTITUTE (4RUSKUR) 4019000100003 REFERENCE (J,SJA,30,452,1971) Eng.transl.of AE,30,369,1971 4019000100004 (J,AE,30,(4),369,1971) Data given 4019000100005 AUTHOR (N.I.Ivanova,A.N.Kobzev,N.G.Krylov,A.A.Lbov, 4019000100006 N.P.Martynov,A.E.Trikanov,A.I.Shelamkov) 4019000100007 TITLE Cross section of the Am-241(n,gamma)Am-242 reaction 4019000100008 for a neutron spectrum similar to the fission spectrum 4019000100009 INC-SPECT Neutron spectrum was close to fission spectrum and 4019000100010 had following energy distribution 4019000100011 energy (MeV) per-cent 4019000100012 0 - 0.1 3.8 4019000100013 0.1-0.4 19.3 4019000100014 0.4-0.9 26.9 4019000100015 0.9-1.4 15.0 4019000100016 1.4-3.0 23.8 4019000100017 above 3.0 11.2 4019000100018 SAMPLE ~ 1 mg of Am-241 chloride, alpha-activity ~7.2E+2 4019000100019 decay/min, gamma-activity ~2.7E+3 quanta/min. 4019000100020 In quartz cassettes, placed in Cd sheets of 0.5 mm 4019000100021 thickness. 4019000100022 With each Cd sheet Au-197 foil of ~2mg - for neutron 4019000100023 flux control. 4019000100024 DETECTOR (SCIN) Scintillation plastic detector 53 x 1 mm in size4019000100025 and an FEU-11B photomultiplier was used to measure 4019000100026 beta-activity. 4019000100027 Different registration thresholds, corresponding to 4019000100028 beta energy ~150-300 keV. 4019000100029 Calibration by Sr-90 (E-beta 0.54 MeV), Tl( 0.765 MeV),4019000100030 Au-198( 0.963 MeV). 4019000100031 Efficiency for Am-242 was 13.7 and 11 % depending from 4019000100032 threshold value. 4019000100033 PART-DET (B-) Decay beta 4019000100034 CORRECTION For background. 4019000100035 For decay at activation. 4019000100036 For decay scheme. 4019000100037 HISTORY (19740117C) Compiled at the centre 4019000100038 (19750210U) the number of subentry 40190002 corrected 4019000100039 (20150109A) SD: Updated to new date formats,lower case.4019000100040 Ref. on Engl.transl. of AE added. REACTION code moved4019000100041 to Subent 2. DATA-ERR -> ERR-T. ERR-ANALYS updated. 4019000100042 (20150625A) M.M. Article was checked, BIB information 4019000100043 was updated. SPA -> FIS. STATUS was added. 4019000100044 Subents 003,004 ( primarily measured data) were added. 4019000100045 ENDBIB 43 0 4019000100046 NOCOMMON 0 0 4019000100047 ENDSUBENT 46 0 4019000199999 SUBENT 40190002 20150625 41694019000200001 BIB 5 15 4019000200002 REACTION (95-AM-241(N,G)95-AM-242-G,,SIG,,FIS) 4019000200003 Average of six measurements. 4019000200004 DECAY-DATA (95-AM-242-G,16.01HR) 4019000200005 ERR-ANALYS (ERR-T) Total error is given, it consists of 4019000200006 (ERR-1,2.,4.) Uncertainty in activity measurement(2-4%)4019000200007 (ERR-2) Uncertainty in half-life Am-242 (2%) 4019000200008 (ERR-3) Error of neutron flux determination (7%) 4019000200009 (ERR-4) Error of number of atoms in sample (4%) 4019000200010 (ERR-5) Error of detector efficiency (3%) 4019000200011 STATUS (TABLE) Table of J,AE,30,(4),369,1971 4019000200012 (DEP,40190003) In Subent 003 - primarily measured data 4019000200013 for each of 6 samples. 4019000200014 HISTORY (20150109A) SD: REACTION code added from Sub.1. 4019000200015 DECAY-DATA was added. 4019000200016 (20150625A) M.M. -G wa added in SF4. 4019000200017 ENDBIB 15 0 4019000200018 COMMON 4 3 4019000200019 ERR-2 ERR-3 ERR-4 ERR-5 4019000200020 PER-CENT PER-CENT PER-CENT PER-CENT 4019000200021 2. 7. 4. 3. 4019000200022 ENDCOMMON 3 0 4019000200023 DATA 3 1 4019000200024 EN-DUMMY DATA ERR-T 4019000200025 MEV MB MB 4019000200026 1. 240. 30. 4019000200027 ENDDATA 3 0 4019000200028 ENDSUBENT 27 0 4019000299999 SUBENT 40190003 20150109 41694019000300001 BIB 10 41 4019000300002 REACTION 1(95-AM-241(N,G)95-AM-242-G,,SIG,,FIS) 4019000300003 2(95-AM-241(N,G)95-AM-242-G,,SIG,,FIS) 4019000300004 3(95-AM-241(N,G)95-AM-242-G,,SIG,,FIS) 4019000300005 4(95-AM-241(N,G)95-AM-242-G,,SIG,,FIS) 4019000300006 5(95-AM-241(N,G)95-AM-242-G,,SIG,,FIS) 4019000300007 6(95-AM-241(N,G)95-AM-242-G,,SIG,,FIS) 4019000300008 DECAY-DATA (95-AM-242-G,16.01HR,B,667.,,B,625.) 4019000300009 40.% of 667 keV, 60.% of 625 keV. 4019000300010 Beta decay - 83.6 %, electron capture (16.4+-0.3)%. 4019000300011 SAMPLE 1 Am-241 atoms 2.32E+18 4019000300012 2 1.23E+18 4019000300013 3 2.06E+18 4019000300014 4 4.9E+17 4019000300015 5 1.89E+18 4019000300016 6 1.22E+17 4019000300017 DETECTOR (IOCH) Number of Am-241 atoms was defined by 4019000300018 alpha-activity measurement in integral ionization 4019000300019 chamber. 4019000300020 METHOD (ACTIV) Beta activity measurement during 4-5 HL of 4019000300021 Am-242. 4019000300022 (CHSEP) Am was separated chemically and purified from 4019000300023 fission products during 20 hr. 4019000300024 ANALYSIS CS were calculated to 6 samples as: 4019000300025 (A*HL)/(N*Q*0.693) , where 4019000300026 A - absolute Am-242 activity at the end of activation 4019000300027 taking into account registration efficiency and 4019000300028 corrections; 4019000300029 HL - Am-242 half-life; 4019000300030 N - Am-241 atoms on sample; 4019000300031 Q - neutron flux. 4019000300032 MISC-COL (MISC1) Integral flux, neutron/cm2 , measured by fis. 4019000300033 chambers. 4019000300034 (MISC2) Am-242 absolute activity, decay/min . 4019000300035 ERR-ANALYS Total error consists of 4019000300036 (ERR-1,2.,4.) Uncertainty in activity measurement(2-4%)4019000300037 (ERR-2) Uncertainty in half-life Am-242 (2%) 4019000300038 (ERR-3) Error of neutron flux determination (7%) 4019000300039 (ERR-4) Error of number of atoms in sample (4%) 4019000300040 (ERR-5) Error of detector efficiency (3%) 4019000300041 STATUS (TABLE) Table of J,AE,30,(4),369,1971 4019000300042 HISTORY (20150625C) M.M. 4019000300043 ENDBIB 41 0 4019000300044 COMMON 5 3 4019000300045 EN-DUMMY ERR-2 ERR-3 ERR-4 ERR-5 4019000300046 MEV PER-CENT PER-CENT PER-CENT PER-CENT 4019000300047 1. 2. 7. 4. 3. 4019000300048 ENDCOMMON 3 0 4019000300049 DATA 18 1 4019000300050 DATA 1MISC1 1MISC2 1DATA 2MISC1 2MISC2 24019000300051 DATA 3MISC1 3MISC2 3DATA 4MISC1 4MISC2 44019000300052 DATA 5MISC1 5MISC2 5DATA 6MISC1 6MISC2 64019000300053 MB SEE TEXT SEE TEXT MB SEE TEXT SEE TEXT 4019000300054 MB SEE TEXT SEE TEXT MB SEE TEXT SEE TEXT 4019000300055 MB SEE TEXT SEE TEXT MB SEE TEXT SEE TEXT 4019000300056 228. 1.96E+15 7.4E+5 232. 1.96E+15 4.0E+54019000300057 233. 1.97E+15 6.8E+5 273. 1.97E+15 1.9E+54019000300058 235. 2.0E+15 6.4E+5 248. 2.0E+15 1.5E+54019000300059 ENDDATA 9 0 4019000300060 ENDSUBENT 59 0 4019000399999 SUBENT 40190004 20150625 41694019000400001 BIB 4 8 4019000400002 REACTION (79-AU-197(N,G)79-AU-198,,SIG,,FIS) 4019000400003 METHOD Au-197 capture c-s was measured by plastic scintillator4019000400004 for checking possible systematic errors in measurement 4019000400005 method. Obtained value of C-S agrees with value 150mb 4019000400006 from I.V.Gordeev+,Yaderno-fizicheskie konstanty,M., 4019000400007 Atomizdat,p.316, 1963 year. 4019000400008 STATUS (TABLE) Text, page 372 of J,AE,30,(4),369,1971 4019000400009 HISTORY (20150625C) M.M. 4019000400010 ENDBIB 8 0 4019000400011 NOCOMMON 0 0 4019000400012 DATA 3 1 4019000400013 EN-DUMMY DATA ERR-T 4019000400014 MEV MB MB 4019000400015 1. 140. 15. 4019000400016 ENDDATA 3 0 4019000400017 ENDSUBENT 16 0 4019000499999 ENDENTRY 4 0 4019099999999