ENTRY 41255 20190520 41824125500000001 SUBENT 41255001 20190520 41824125500100001 BIB 14 49 4125500100002 TITLE Measurement of the effective number of secondary 4125500100003 neutrons from Pu239 in the incident neutron energy 4125500100004 region from 7 to 30 eV. 4125500100005 AUTHOR (I.V.Kirpichnikov, V.V.Okorokov, S.I.Sukhoruchkin) 4125500100006 INSTITUTE (4RUSITE) 4125500100007 REFERENCE (J,AE,2,247,1957) Main Reference.Data are given.Issue 34125500100008 (J,SJA,2,299,1957) Engl.translation of AE,2,(3),247 4125500100009 #doi:10.1007/BF01514611 4125500100010 (J,JNE,6,163,1957) Engl.translation of AE,2,(3),247 4125500100011 FACILITY (CYCLO,4RUSITE) Cyclotron with intrinsic Be target 4125500100012 INC-SOURCE (THCOL) Paraffin cube 4125500100013 DETECTOR (BF3) 15 proportional counters for slow neutron 4125500100014 registration. Filled by BF3. Diameter 3.5 cm, length 4125500100015 15 cm. Placed at the end of collimator. 4125500100016 4 BF3 gas counters of 2.5 cm diameter, 19 cm length, 4125500100017 placed before sample - to measure neutron flux on 4125500100018 sample and for normalization. 4125500100019 (SCIN) For fission neutrons registration. 4125500100020 SAMPLE Pu-239 10[20 cm**2, thickness 0.5g/cm**2. 4125500100021 ASSUMED (ASSUM1,94-PU-239(N,F),PR,NU) 4125500100022 Was set constant in whole energy region. 4125500100023 Used for normalization. 4125500100024 (ASSUM2,94-PU-239(N,F),,SIG) At thermal energy. 4125500100025 (ASSUM3,94-PU-239(N,ABS),,SIG) At thermal energy. 4125500100026 METHOD (TRN) Transmission. 4125500100027 (TOF) 15.6m, 2m and 1 m flight paths. 4125500100028 ANALYSIS Absorption c-s was defined as: 4125500100029 SIGabs=-(1/n)*ln(T) - SIGsct , where 4125500100030 SIGsct - potential scattering C-S, 4125500100031 T - transmission, 4125500100032 n- number of atoms for 1 cm**2 in sample. 4125500100033 Fission C-S was defined as: 4125500100034 SIGf= Nf*SIGabs/(N*sqrt(E)*(1-T)), 4125500100035 Nf - fission counts, 4125500100036 N*sqrt(E) - slow neutron flux. 4125500100037 NUeff =Nf*EPS/(N*sqrt(E)*(1-T)) , 4125500100038 EPS - registration efficiency. 4125500100039 CORRECTION For background ( measured). 4125500100040 ERR-ANALYS (ERR-S) Statistical error. 4125500100041 (ERR-1,,15.) Normalization error. 4125500100042 HISTORY (19970702C) + + Compiled at the Center - CJD (S.M.) + 4125500100043 (20010326A) . . Date Corrected. Reaction Code in 4125500100044 San 003 Changed 4125500100045 (20010326U) Last checking has been done. 4125500100046 (20140814A) M.M. Upper -> lower case correction. 4125500100047 Ref. of Engl.translation was added. 4125500100048 BIB information was updated. 4125500100049 DATA-ERR -> ERR-S, ERR-1 was added. 4125500100050 (20190520U) Ref. J,JNE,6,163,1957 was added. 4125500100051 ENDBIB 49 0 4125500100052 COMMON 3 3 4125500100053 ASSUM1 ASSUM2 ASSUM3 4125500100054 PRT/FIS B B 4125500100055 2.9 729. 1032. 4125500100056 ENDCOMMON 3 0 4125500100057 ENDSUBENT 56 0 4125500199999 SUBENT 41255002 20140814 41644125500200001 BIB 3 6 4125500200002 REACTION 1(94-PU-239(N,F),,WID) 4125500200003 2(94-PU-239(N,G),,WID) 4125500200004 3(94-PU-239(N,TOT),,WID) 4125500200005 STATUS (TABLE) Table of AE,2,(3),247,1957 4125500200006 HISTORY (19970702T) * * Converted from Subent 80386002 4125500200007 (20010326U) Last checking has been done. 4125500200008 ENDBIB 6 0 4125500200009 NOCOMMON 0 0 4125500200010 DATA 7 10 4125500200011 EN-RES DATA 1ERR-S 1DATA 2ERR-S 2DATA 34125500200012 ERR-S 3 4125500200013 MEV MILLI-EV MILLI-EV MILLI-EV MILLI-EV MILLI-EV 4125500200014 MILLI-EV 4125500200015 3.E-07 5.6E+01 5. 4.4E+01 4.5 1.E+024125500200016 2. 4125500200017 7.8E-06 1.9E+01 3. 2.3E+01 5. 4.2E+014125500200018 6. 4125500200019 1.095E-05 7.7E+01 1.E+01 5.3E+01 1.1E+01 1.3E+024125500200020 1.5E+01 4125500200021 1.19E-05 2.6E+01 4. 2.6E+01 9. 5.2E+014125500200022 5. 4125500200023 1.43E-05 1.7E+01 5. 4.3E+01 1.1E+01 6.E+014125500200024 1.E+01 4125500200025 1.47E-05 4.E+01 9. 4.E+01 7. 8.E+014125500200026 1.5E+01 4125500200027 1.55E-05 1.55E+02 8. 2.E+024125500200028 7.E+01 4125500200029 1.765E-05 2.7E+01 5. 5.5E+01 8. 8.2E+014125500200030 8. 4125500200031 2.23E-05 3.1E+01 8. 2.4E+01 6. 5.5E+014125500200032 5. 4125500200033 2.61E-05 3.1E+01 1.9E+01 8.4E+01 2.5E+01 1.15E+024125500200034 1.7E+01 4125500200035 ENDDATA 24 0 4125500200036 ENDSUBENT 35 0 4125500299999 SUBENT 41255003 20140814 41644125500300001 BIB 3 6 4125500300002 REACTION ((94-PU-239(N,NON),,ETA)// 4125500300003 (94-PU-239(N,NON),,ETA)) Here ETA == Nu-Eff=Nu* 4125500300004 Sigma(FISSION)/Sigma(ABSORPTION) 4125500300005 STATUS (TABLE) Table of AE,2,(3),247,1957 4125500300006 HISTORY (20010326A) . . REACTION code changed to ratio 4125500300007 . . REACTION quantity changed to ETA 4125500300008 ENDBIB 6 0 4125500300009 COMMON 1 3 4125500300010 EN-DN 4125500300011 EV 4125500300012 2.53E-02 4125500300013 ENDCOMMON 3 0 4125500300014 DATA 3 10 4125500300015 EN-NM DATA ERR-S 4125500300016 EV NO-DIM NO-DIM 4125500300017 0.3 .8 .05 4125500300018 7.8 .5 .03 4125500300019 10.95 .78 .03 4125500300020 11.9 .48 .04 4125500300021 14.3 .41 .08 4125500300022 14.7 .6 .04 4125500300023 15.5 1.12 .22 4125500300024 17.65 .48 .05 4125500300025 22.3 .79 .08 4125500300026 26.1 .39 .18 4125500300027 ENDDATA 12 0 4125500300028 ENDSUBENT 27 0 4125500399999 ENDENTRY 3 0 4125599999999