ENTRY 40552 20230303 4055200000001 SUBENT 40552001 20230303 20231011 4055200100001 BIB 13 33 4055200100002 TITLE Absolute measurements of fission cross-sections for 4055200100003 U-233, Np-237 and Pu-239 by 14.8 MeV neutrons 4055200100004 AUTHOR (I.D.Alknazov,S.S.Kovalenko,O.I.Kostochkin,L.Z.Malkin, 4055200100005 K.A.Petrzhak,A.M.Sokolov,A.V.Fomichev,V.I.Shpakov, 4055200100006 V.M.Adamov,B.M.Alexandrov,L.V.Drapchinsky, 4055200100007 G.Yu.Kudriavsev,D.A.Pleskachevsky) 4055200100008 V.I.Shapakov (misprint in 77NBS) = V.I.Shpakov 4055200100009 INSTITUTE (4RUSRI) 4055200100010 REFERENCE ((C,77KIEV,3,155,1977)= 4055200100011 (R,INDC(CCP)-118,(3),155,1977)) Data given 4055200100012 (C,77NBS,,313,1977) First author V.M.Adamov. 4055200100013 Same 237Np(n,f) cross section given. 4055200100014 MONITOR Absolute measurements 4055200100015 METHOD (ASSOP) 4055200100016 FACILITY (CCW) 4055200100017 DETECTOR (FISCH) Ionization and scintillation gas chambers 4055200100018 for fission fragments 4055200100019 (SOLST) Plastic scintillator for alpha-particles 4055200100020 INC-SOURCE (D-T) 4055200100021 PART-DET (FF,A) 4055200100022 CORRECTION on ionization chamber efficiency (0.8+-0.2 %), 4055200100023 on fission fragment absorption in target (1.19+-0.12 %)4055200100024 on neutron flux absorption (10.8+-0.2 %) 4055200100025 COMMENT Data are compared with another authors data.4055200100026 HISTORY (19780909C) Compiled at the centre 4055200100027 (19861021A) Data in SAN 002, 004 deleted on the reason4055200100028 of the data repetition in SANS 40547003, 4055200100029 40547009 4055200100030 (20200311A) M.M. Refs. 77NBS,,313,1977, INDC(CCP)-118 4055200100031 were added. 4055200100032 Upper -> lower case correction. 4055200100033 Dates were corrected for 4-digits year. 4055200100034 (20230303U) Subent 003 was corrected. 4055200100035 ENDBIB 33 0 4055200100036 COMMON 1 3 4055200100037 EN 4055200100038 MEV 4055200100039 14.8 4055200100040 ENDCOMMON 3 0 4055200100041 ENDSUBENT 40 0 4055200199999 NOSUBENT 40552002 20200311 41864055200200001 SUBENT 40552003 20230303 20231011 4055200300001 BIB 6 43 4055200300002 REACTION (93-NP-237(N,F),,SIG) 4055200300003 DECAY-DATA (93-NP-237,2.11E+06YR) (2.11+-0.01)*10**6 yr HL was 4055200300004 used to define number of nuclei in the sample. 4055200300005 ERR-ANALYS (ERR-1) Error in the solid angle arising at the 4055200300006 weighing of the sample in the small-solid- 4055200300007 angle camera 4055200300008 (ERR-2) Statistical error arising at the sample 4055200300009 weighing in the small-solid-angle camera 4055200300010 (ERR-3) Error of the isotope fraction determination 4055200300011 at the sample weighing 4055200300012 (ERR-4) Error of the fissionable isotope half-life 4055200300013 influencing on the sample weighing 4055200300014 (ERR-5) Statistical error arising by the number-of- 4055200300015 fissions determination of isotope under study 4055200300016 (ERR-6) Error due to the random coincidence number 4055200300017 by the fission number determination 4055200300018 (ERR-7) Error due to the neutron flux losses by the 4055200300019 fission number determination 4055200300020 (ERR-8) Error due to the extrapolation of the 4055200300021 fission-fragments-spectrum to zero-energy 4055200300022 arising by the number-of-fission determination4055200300023 (ERR-9) Error due to the correction on neutron 4055200300024 absorption in the layer by the number-of- 4055200300025 fissions determination 4055200300026 (ERR-10) Error due to the fission of the admixture 4055200300027 isotopes 4055200300028 (ERR-11) Error due to the associated-particles 4055200300029 number determination 4055200300030 (ERR-T) Total error ( 0.047 b absolute value) 4055200300031 (ERR-S) Statistical error of fission counts 4055200300032 STATUS (TABLE) Table 1 - uncertainties, Table 2 - CS 4055200300033 of INDC(CCP)-118,v.3,p.155,1977. 4055200300034 The same CS in Conf.Proc.77BNS,,313,1977 4055200300035 REL-REF (A,,P.H.White+,R,EANDC(UK)-77S,1966) 4055200300036 2.36+-0.09 b at 14.1 MeV 4055200300037 (A,,A.Moat,W,MOAT,1969) Ref.in review of W.Hart 4055200300038 2.50+-0.07 b at 14.0 MeV 4055200300039 (A,,A.N.Protopopov+,J,JNE/B,9,157,1959) 4055200300040 2.40+-0.03 b at 14.0 MeV 4055200300041 (O,40553002,V.M.Adamov+,C,77NBS,,313,1977) 4055200300042 Data for incident neutrons of Cf-252 spectrum 4055200300043 HISTORY (20230303U) ERR-T=0.047 b was deleted from Data block 4055200300044 according to memo CP-D/1070. 4055200300045 ENDBIB 43 0 4055200300046 COMMON 11 6 4055200300047 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 4055200300048 ERR-7 ERR-8 ERR-9 ERR-10 ERR-11 4055200300049 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 4055200300050 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 4055200300051 .3 .45 .1 .47 1.4 .2 4055200300052 1.0 .30 .30 .15 .05 4055200300053 ENDCOMMON 6 0 4055200300054 DATA 3 1 4055200300055 DATA ERR-S ERR-T 4055200300056 B PER-CENT PER-CENT 4055200300057 2.430 1.4 1.94 4055200300058 ENDDATA 3 0 4055200300059 ENDSUBENT 58 0 4055200399999 NOSUBENT 40552004 20200311 41864055200400001 ENDENTRY 4 0 4055299999999