ENTRY 40018 20220220 42044001800000001 SUBENT 40018001 20220220 42044001800100001 BIB 13 35 4001800100002 TITLE The cross section for fission of Np237 by slow neutrons4001800100003 AUTHOR (K.A.Gavrilov,K.K.Koshaeva,S.N.Kraitor,L.B.Pikel'ner) 4001800100004 REFERENCE (J,AE,28,362,1970) Issue 4. Tabulated data and graphs 4001800100005 (J,SJA,28,464,1970) English translation of Atomnaja 4001800100006 Energija 4001800100007 (R,YFI-9,24,1969) Numerical data identical with 4001800100008 Atomnaja Energija 4001800100009 (R,INDC(CCP)-9,31,1970) 4001800100010 Engl.translation of YFI-9,24,1969 4001800100011 INSTITUTE (4ZZZDUB) 4001800100012 FACILITY (REAC,4ZZZDUB) JINR fast pulsed reactor with microtron 4001800100013 SAMPLE Neptunium oxide with layer thickness < 50. mugram/cm**24001800100014 on aluminum foil, final thickness of target 0.5 mg/cm2 4001800100015 of Np oxide. 4E+19 nuclei of neptunium. 4001800100016 Pu-239 content < 2E-3 %. 4001800100017 U-235 content (1.5-2.)*10**-2%. 4001800100018 METHOD (TOF) Flight path 16.3 m. 4001800100019 Resolution 0.25 microsec/m 4001800100020 DETECTOR (SCIN) Scintillation detector Luminophor FS-1, on base 4001800100021 of ZnS. See REL-REF of S.N.Kraitor. 4001800100022 FF detection efficiency (40+-5) %. 4001800100023 REL-REF (I,,S.N.Kraitor,J,PTE,,(3),63,1968) 4001800100024 Detector details 4001800100025 MONITOR Absolute measurements. Efficiency of registration of 4001800100026 fission events was determined on spontaneous fission 4001800100027 of curium-244 and on neptunium fission with neutrons 4001800100028 from plutonium-beryllium source. Calibrated boron 4001800100029 counter was used for determination of neutron flux. 4001800100030 PART-DET (FF) 4001800100031 ADD-RES Table 2 - calculated value of ETA,% (formula 3) for 4001800100032 different spectra. 4001800100033 HISTORY (19730403C) Data compiled at the centre 4001800100034 (19750210A) ISO-QUANT in SUBENTRY 002 corrected 4001800100035 (20210622U) M.M. Update for current rules. 4001800100036 (20220120A) REL-REFs were added. STATUS was updated. 4001800100037 ENDBIB 35 0 4001800100038 NOCOMMON 0 0 4001800100039 ENDSUBENT 38 0 4001800199999 SUBENT 40018002 20220220 42044001800200001 BIB 7 14 4001800200002 REACTION (93-NP-237(N,F),,WID,,S0) 4001800200003 REL-REF (A,20447001,D.Paya+,C,66PARIS,2,128,1966) 4001800200004 Nucl.Data For Reactors. Vienna,IAEA,v.2,p.128,(1967) 4001800200005 STI/PUB/140 4001800200006 COMMENT Of compiler. 4001800200007 Data of D.Paya+ were not found in REL-REF and in 4001800200008 Entry 20447, so they are given in MISC as presented in 4001800200009 Table 1 of R,INDC(CCP)-9,31,1970 4001800200010 MISC-COL (MISC) SIG*GAMMAfission of D.Paya+ 4001800200011 ANALYSIS (AREA) 4001800200012 ERR-ANALYS (DATA-ERR) Total error 4001800200013 STATUS (TABLE) Table 1 of Sov.Atom.Energy,v.28,p.464,1970 4001800200014 = Table 1 of R,INDC(CCP)-9,31,1970 - 4001800200015 Engl.translation of YFI-9,24,1969 4001800200016 ENDBIB 14 0 4001800200017 NOCOMMON 0 0 4001800200018 DATA 5 7 4001800200019 EN-RES DATA DATA-ERR MISC MISC-ERR 4001800200020 EV MB*EV MB*EV MB*EV MB*EV 4001800200021 0.49 2.9 0.7 4001800200022 1.32 3.8 1.0 2.5 0.6 4001800200023 1.48 3.5 1.0 2. 0.5 4001800200024 1.97 1.9 1.0 4001800200025 3.88 16. 4. 8.9 1.2 4001800200026 5.80 46. 9. 19. 3. 4001800200027 7.5 12. 6. 4001800200028 ENDDATA 9 0 4001800200029 ENDSUBENT 28 0 4001800299999 SUBENT 40018003 20220220 42044001800300001 BIB 6 16 4001800300002 REACTION (93-NP-237(N,F),,WID) 4001800300003 ANALYSIS Dependent data.Data are obtained on base of data of 4001800300004 SUBENT 40018002 in assumption that gamma-width was 4001800300005 equal 40. meV and data for G*NEUTRON-WIDTH were 4001800300006 taken from REL-REFs: 4001800300007 REL-REF (R,,D.Paya+,C,66PARIS,2,128,1966) 4001800300008 Nucl.Data For Reactors. Vienna,IAEA,v.2,p.128,(1967) 4001800300009 STI/PUB/140 4001800300010 (R,20447001,A.Fubini+,J,PRL,20,1373,1968) 4001800300011 ASSUMED (ASSUM,93-NP-237(N,EL),,WID,,G) 4001800300012 G*NEUTR-WIDTH.See free text under ANALYSIS. 4001800300013 STATUS (TABLE) Table 1 of Sov.Atom.Energy,v.28,p.464,1970 4001800300014 = Table 1 of R,INDC(CCP)-9,31,1970 - 4001800300015 Engl.translation of YFI-9,24,1969 4001800300016 (DEP,40018002) See analysis 4001800300017 HISTORY (20210622A) MISC -> ASSUM 4001800300018 ENDBIB 16 0 4001800300019 NOCOMMON 0 0 4001800300020 DATA 3 7 4001800300021 EN-RES DATA ASSUM 4001800300022 EV MICRO-EV MILLI-EV 4001800300023 0.49 1.3 0.016 4001800300024 1.32 4.1 0.0187 4001800300025 1.48 1.1 0.0725 4001800300026 1.97 8.4 0.0083 4001800300027 3.88 7.8 0.122 4001800300028 5.80 13. 0.311 4001800300029 7.5 19. 0.073 4001800300030 ENDDATA 9 0 4001800300031 ENDSUBENT 30 0 4001800399999 ENDENTRY 3 0 4001899999999