ENTRY 41667 20190513 41824166700000001 SUBENT 41667001 20190513 41824166700100001 BIB 12 30 4166700100002 REFERENCE (J,JNE,6,155,1957) Engl.translation of: 4166700100003 (J,AE,2,240,1957) Issue 3. 4166700100004 (J,SJA,2,291,1957) Engl. translation of AE,2,240,1957 4166700100005 AUTHOR (P.A.Krupchinsky) 4166700100006 TITLE The thermal neutron absorption cross-section and 4166700100007 resonance absorption integral of 240PU 4166700100008 INSTITUTE (4RUSRUS) 4166700100009 FACILITY (REAC,4RUSRUS) Heavy water reactor 4166700100010 (OSCIP,4RUSRUS) 4166700100011 METHOD Pile-oscillator method 4166700100012 INC-SOURCE Boron shutter was used for V=2200 m/sec neutrons. 4166700100013 INC-SPECT Thermal neutron flux was measured by gold foils to be 4166700100014 1.6E+7 /sec/cm2 . 4166700100015 to be (3.3+-0.2)*10**14 /sec/cm2. 4166700100016 DETECTOR (IOCH) BF3-fillled ionoization chamber for flux 4166700100017 variation measurement. 4166700100018 SAMPLE Heavy water solution of Pu(SO(4))(2), placed at in the4166700100019 central thermal column and in the lattice region of 4166700100020 reactor. 4166700100021 Three samples in three groups : 4166700100022 - Pu-239 - 98.44+-0.03 %, Pu-240 - 1.56+- 0.03 % , 4166700100023 weights -17.73, 35,95, 53,92 mg ; 4166700100024 - Pu-239 - 91.87+-0.06 %, Pu-240 - 7.13+- 0.06 % , 4166700100025 Pu-241 - 0.97 +-0.02 %, 4166700100026 weights -20.04, 39.89, 59.94 mg; 4166700100027 - Pu-239 - 79.5 +-0.2 %, Pu-240 - 17.2+- 0.2 % , 4166700100028 Pu-241 - 3.14 +-0.05 %, 4166700100029 weights 23.03, 45.85, 58.72 mg . 4166700100030 CORRECTION For background ( measured without Pu samples). 4166700100031 HISTORY (20190513C) M.M. 4166700100032 ENDBIB 30 0 4166700100033 NOCOMMON 0 0 4166700100034 ENDSUBENT 33 0 4166700199999 SUBENT 41667002 20190513 41824166700200001 BIB 6 13 4166700200002 REACTION (94-PU-240(N,ABS),,SIG,,MXW) 4166700200003 METHOD Measurement at thermal column, Maxwellian spectrum of 4166700200004 305 K . 4166700200005 ASSUMED (ASSUM1,94-PU-239(N,ABS),,SIG,,MXW) 4166700200006 (ASSUM2,94-PU-241(N,ABS),,SIG,,MXW) 4166700200007 (ASSUM3,94-PU-239(N,ABS),,ETA,,MXW) 4166700200008 (ASSUM4,94-PU-239(N,ABS),,ETA,,MXW) 4166700200009 REL-REF (R,40804004,A.J.Alikhanov+,C,55GENEVA,4,301(658),1955) 4166700200010 ASSUM3 ref. 4166700200011 ERR-ANALYS (DATA-ERR) Errors determined by discrepancy between two4166700200012 determinations. 4166700200013 STATUS (TABLE) Text on page 159 in 4166700200014 J.of Nucl.Ener.,v.6,p.155,1957 4166700200015 ENDBIB 13 0 4166700200016 COMMON 5 3 4166700200017 EN-DUMMY ASSUM1 ASSUM2 ASSUM3 ASSUM4 4166700200018 EV B B B B 4166700200019 0.0253 1140. 1290. 2.03 2.2 4166700200020 ENDCOMMON 3 0 4166700200021 DATA 2 1 4166700200022 DATA DATA-ERR 4166700200023 B B 4166700200024 560. 35. 4166700200025 ENDDATA 3 0 4166700200026 ENDSUBENT 25 0 4166700299999 SUBENT 41667003 20190513 41824166700300001 BIB 5 10 4166700300002 REACTION (94-PU-240(N,ABS),,SIG,,SPA) 4166700300003 METHOD Measurement at lattice 4166700300004 ASSUMED (ASSUM1,94-PU-239(N,ABS),,SIG,,SPA) 4166700300005 (ASSUM2,94-PU-241(N,ABS),,SIG,,SPA) 4166700300006 (ASSUM3,94-PU-239(N,ABS),,ETA,,SPA) 4166700300007 (ASSUM4,94-PU-239(N,ABS),,ETA,,SPA) 4166700300008 ERR-ANALYS (DATA-ERR) Errors determined by discrepancy between two4166700300009 determinations. 4166700300010 STATUS (TABLE) Text on page 159 in 4166700300011 J.of Nucl.Ener.,v.6,p.155,1957 4166700300012 ENDBIB 10 0 4166700300013 COMMON 5 3 4166700300014 EN-DUMMY ASSUM1 ASSUM2 ASSUM3 ASSUM4 4166700300015 EV B B B B 4166700300016 0.0253 1340. 1520. 1.99 2.2 4166700300017 ENDCOMMON 3 0 4166700300018 DATA 2 1 4166700300019 DATA DATA-ERR 4166700300020 B B 4166700300021 1010. 120. 4166700300022 ENDDATA 3 0 4166700300023 ENDSUBENT 22 0 4166700399999 SUBENT 41667004 20190513 41824166700400001 BIB 4 19 4166700400002 REACTION (94-PU-240(N,ABS),,SIG,,MXW) 4166700400003 Thermal neutron absorption cross section 4166700400004 ANALYSIS SIGt at Maxwellian spectrum of 380 K was derived from 4166700400005 formulas : 4166700400006 SIGlattice = SIGt + 0.055*I, 4166700400007 SIGwell = SIGt + 0.010*I, 4166700400008 where I - resonance absorption integral with 0.2 cutoff4166700400009 energy, 4166700400010 coefficients 0.010 and 0.055 were determined in 4166700400011 additional measuremnt by In foils with and without Cd 4166700400012 ( 0.25mm, cut of 0.4 eV, counting 30-60 min ), taking 4166700400013 0.2 eV as point of transition between the Maxwellian 4166700400014 spectrum and dE/E spectrum. 4166700400015 ERR-ANALYS (DATA-ERR) Type of error is not explained in the 4166700400016 article . 4166700400017 STATUS (TABLE) Text of abstract and text on page 161 in 4166700400018 J.of Nucl.Ener.,v.6,p.155,1957 4166700400019 (DEP,41667002) Directly measured CS (spectrum averaged)4166700400020 (DEP,41667003) Directly measured CS (spectrum averaged)4166700400021 ENDBIB 19 0 4166700400022 NOCOMMON 0 0 4166700400023 DATA 3 1 4166700400024 EN-DUMMY DATA DATA-ERR 4166700400025 EV B B 4166700400026 0.025 460. 45. 4166700400027 ENDDATA 3 0 4166700400028 ENDSUBENT 27 0 4166700499999 SUBENT 41667005 20190513 41824166700500001 BIB 4 11 4166700500002 REACTION (94-PU-240(N,ABS),,RI) 4166700500003 REL-REF (A,41668001,B.G.Erozolimsky+,J,JNE,4,86,1957) 4166700500004 9000+-3000 barn 4166700500005 ERR-ANALYS (DATA-ERR) Type of error is not explained in the 4166700500006 article . 4166700500007 STATUS (TABLE) Text of abstract and text on page 161 in 4166700500008 J.of Nucl.Ener.,v.6,p.155,1957 4166700500009 (DEP,41667002) Directly measured CS (spectrum averaged)4166700500010 (DEP,41667003) Directly measured CS (spectrum averaged)4166700500011 used to derive res.integral ( see also ANALYSIS in 4166700500012 Subent 004 4166700500013 ENDBIB 11 0 4166700500014 NOCOMMON 0 0 4166700500015 DATA 3 1 4166700500016 EN-MIN DATA DATA-ERR 4166700500017 EV B B 4166700500018 0.2 10000. 2800. 4166700500019 ENDDATA 3 0 4166700500020 ENDSUBENT 19 0 4166700599999 ENDENTRY 5 0 4166799999999