ENTRY 20175 20110827 22272017500000001 SUBENT 20175001 20110827 22272017500100001 BIB 13 55 2017500100002 TITLE -An experimental study of the prompt fission neutron 2017500100003 spectrum induced by 0.5 MeV incident neutrons on 2017500100004 U-235.- 2017500100005 AUTHOR (P.I.Johansson, B.Holmqvist, T.Wiedling) 2017500100006 INSTITUTE (2SWDAE ) At the moment 2SWDSWR, Studsvik Science 2017500100007 Research Laboratory 2017500100008 REFERENCE (J,NSE,62,(4),695,197704) Main reference. 2017500100009 ((P,EANDC(OR)-115,28,197207)= 2017500100010 (P,INDC(SWD)-4/G,28,197207)) 2017500100011 (P,S-455,21,197210) Prog.Rep. of nuclear phys. lab. 2017500100012 (W,Johansson,197301) Numerical value of fission 2017500100013 neutron spectra. 2017500100014 FACILITY (VDG,2SWDAE ) Studsvik Van de Graaff accelerator. 2017500100015 INC-SOURCE (P-LI7) Proton-lithium 7. 2017500100016 SAMPLE (92-U-235,0.9315) 2017500100017 (92-U-238,0.0685)Cylindric uranium sample, 3 cm height,2017500100018 1.8 cm outer diam. and 0.95 inner diam. 2017500100019 METHOD (TOF) Time of flight, path = 300 cm. 2017500100020 (PSD) Pulse-shape discrimination 2017500100021 DETECTOR (SCIN) Large liquid scintillator using pulse shape 2017500100022 discrimination, with large shielding of lithium, 2017500100023 paraffin, iron and lead. 2017500100024 (LONGC) Direction sensitive long counter as flux 2017500100025 monitoring of incident neutron. 2017500100026 .Relative detector efficiency was determined by N-P 2017500100027 scattering at 0.9 to 15 MeV and T(P,N)He3 reaction 2017500100028 for low energy up to 0.5 MeV. 2017500100029 .Energy calibration of the neutron spectrometer was 2017500100030 done with the T(P,N)He-3, the T(D,N)He-4 and the 2017500100031 Be-9(D,N)B-10 reactions. 2017500100032 .Detection angle for fission neutron was 90 degree 2017500100033 relative to incident neutron beam. 2017500100034 CORRECTION .Contributions to fission spectra caused by high-energy2017500100035 tail of elastic peak were subtracted by neutron 2017500100036 scattering spectra recorded with Ta-181 sample, 2017500100037 .Corrections for flux attenuation in U-sample were done2017500100038 by MONTE CARLO technique, 2017500100039 .Effect of neutron multiple scattering was to be small 2017500100040 and neglected. 2017500100041 ERR-ANALYS .Uncertainties in detector efficiency,time calibration,2017500100042 counting statistics and background at different ener- 2017500100043 gies are given in Table II in main reference. 2017500100044 .Total uncertainty varies between 3 and about 25 per- 2017500100045 cent. 2017500100046 STATUS .Data taken from main reference. 2017500100047 HISTORY (19730124C) 2017500100048 (19740521E) 2017500100049 (19790809A) Updated with main reference. 2017500100050 (19790827E) 2017500100051 (20110707A) Date is corrected. Upper case in comments 2017500100052 is to low case changed. 2017500100053 (20110827A) BIB information in SAN 001 modified. 2017500100054 Data SUBENTs were re-compiled to introduce 2017500100055 additional data and data-errors. 2017500100056 New SUBENT 20175004 added 2017500100057 ENDBIB 55 0 2017500100058 COMMON 1 3 2017500100059 EN 2017500100060 MEV 2017500100061 5.3E-01 2017500100062 ENDCOMMON 3 0 2017500100063 ENDSUBENT 62 0 2017500199999 SUBENT 20175002 20110827 22272017500200001 BIB 6 31 2017500200002 REACTION 1(92-U-235(N,F)0-NN-1,PR,KEM,,,DERIV) Temperature of 2017500200003 2(92-U-235(N,F)0-NN-1,PR,KEM,,,DERIV) the Maxwell 2017500200004 distribution of prompt neutrons 2017500200005 3(92-U-235(N,F)0-NN-1,PR,KE,,,DERIV) Average neutron 2017500200006 4(92-U-235(N,F)0-NN-1,PR,KE,,,DERIV) kinetic energy 2017500200007 ANALYSIS .Fission neutron spectrum data were fitted to a 2017500200008 Maxwellian spectrum, N(E)=C*SQRT(E)*exp(-E/T). 2017500200009 Average energy is (3/2)*T 2017500200010 1.Secondary neutron energy interval used for fitting 2017500200011 is 0.6 - 15 MeV 2017500200012 2.Secondary neutron energy interval used for fitting 2017500200013 is 2.0 - 15 MeV 2017500200014 3.Secondary neutron energy interval used for fitting 2017500200015 is 0.6 - 15 MeV 2017500200016 4.Secondary neutron energy interval used for fitting 2017500200017 is 2.0 - 15 MeV 2017500200018 REL-REF (A,,T.W.Bonner,J,NP,23,116,1961) 2017500200019 (A,20616001,H.Werle+,J,JNE,26,165,1972) 2017500200020 (A,13824001,L.Cranberg+,J,PR,103,662,1956) 2017500200021 (A,,A.B.Smith,J,NSE,44,439,1971) 2017500200022 (A,,E.Barnard+,J,NP,71,228,1965) 2017500200023 (D,20575001,H.Conde+,J,AF,29,313,1965) 2017500200024 (A,20385001,M.M.Islam+,J,NSE,50,108,1973) 2017500200025 (A,20394001,H.-H.Knitter+,J,ZP,257,108,1972) 2017500200026 (D,,Yu.A.Vasil'ev+,J,ZET,11,483,1960) 2017500200027 MISC-COL (MISC1) Lower energy of the spectrum fitting 2017500200028 (MISC2) Upper energy of the spectrum fitting 2017500200029 STATUS (TABLE) Data taken from Table IV in NSE,62,(4),695,19772017500200030 journal 2017500200031 (DEP,20175003) 2017500200032 ERR-ANALYS (DATA-ERR) No further explanation. 2017500200033 ENDBIB 31 0 2017500200034 NOCOMMON 0 0 2017500200035 DATA 16 1 2017500200036 DATA 1DATA-ERR 1MISC1 1MISC2 1DATA 2DATA-ERR 22017500200037 MISC1 2MISC2 2DATA 3DATA-ERR 3MISC1 3MISC2 32017500200038 DATA 4DATA-ERR 4MISC1 4MISC2 4 2017500200039 MEV MEV MEV MEV MEV MEV 2017500200040 MEV MEV MEV MEV MEV MEV 2017500200041 MEV MEV MEV MEV 2017500200042 1.331 0.028 0.6 15. 1.290 0.30 2017500200043 2.0 15. 1.980 0.040 0.6 15. 2017500200044 1.936 0.040 2.0 15. 2017500200045 ENDDATA 9 0 2017500200046 ENDSUBENT 45 0 2017500299999 SUBENT 20175003 20110827 22272017500300001 BIB 4 12 2017500300002 REACTION (92-U-235(N,F),PR,NU/DE,,REL) Reference quantity absent2017500300003 ERR-ANALYS (ERR-T) Maximal total error equal to the quadratic 2017500300004 sum of partial errors given below 2017500300005 (ERR-S,0.2,15.) Statistical error 2017500300006 (ERR-1,0.2,20.) Uncertainty of time calibration 2017500300007 (ERR-2,3.,10.) Uncertainty in detector efficiency 2017500300008 (ERR-3,0.1,10.) Uncertainty in background 2017500300009 STATUS (TABLE) Data taken from Table III and errors taken 2017500300010 from Table II in NSE,62,(4),695,1977 journal 2017500300011 HISTORY (20110827A) REACTION code "PR,NU/DE,N" changed to 2017500300012 "PR,NU/DE,,REL". DATA-ERR heading changed to ERR-T 2017500300013 and error structure specified 2017500300014 ENDBIB 12 0 2017500300015 NOCOMMON 0 0 2017500300016 DATA 3 54 2017500300017 E DATA ERR-T 2017500300018 MEV ARB-UNITS PER-CENT 2017500300019 0.625 1.8720E+06 10. 2017500300020 0.675 1.8300E+06 10. 2017500300021 0.725 1.7710E+06 10. 2017500300022 0.775 1.7300E+06 10. 2017500300023 0.825 1.7310E+06 10. 2017500300024 0.875 1.7540E+06 10. 2017500300025 0.925 1.7610E+06 5. 2017500300026 0.975 1.7510E+06 5. 2017500300027 1.025 1.7100E+06 5. 2017500300028 1.075 1.7090E+06 5. 2017500300029 1.125 1.6960E+06 3. 2017500300030 1.175 1.6970E+06 3. 2017500300031 1.240 1.6600E+06 3. 2017500300032 1.320 1.6080E+06 3. 2017500300033 1.400 1.5620E+06 3. 2017500300034 1.480 1.5270E+06 3. 2017500300035 1.560 1.4950E+06 3. 2017500300036 1.640 1.4410E+06 3. 2017500300037 1.720 1.3950E+06 3. 2017500300038 1.800 1.3580E+06 3. 2017500300039 1.880 1.3090E+06 3. 2017500300040 1.960 1.2690E+06 3. 2017500300041 2.074 1.1980E+06 3. 2017500300042 2.224 1.1150E+06 3. 2017500300043 2.374 1.0390E+06 3. 2017500300044 2.524 9.6440E+05 3. 2017500300045 2.674 8.9110E+05 3. 2017500300046 2.824 8.1680E+05 3. 2017500300047 2.974 7.3520E+05 3. 2017500300048 3.123 6.7330E+05 3. 2017500300049 3.274 6.0580E+05 3. 2017500300050 3.424 5.5190E+05 3. 2017500300051 3.621 4.8360E+05 3. 2017500300052 3.871 4.1330E+05 3. 2017500300053 4.122 3.5410E+05 3. 2017500300054 4.372 3.0260E+05 3. 2017500300055 4.621 2.5840E+05 3. 2017500300056 4.871 2.1730E+05 3. 2017500300057 5.194 1.7520E+05 3. 2017500300058 5.592 1.3390E+05 3. 2017500300059 5.989 1.0200E+05 3. 2017500300060 6.390 7.6900E+04 3. 2017500300061 6.792 5.9190E+04 4. 2017500300062 7.187 4.4650E+04 4. 2017500300063 7.591 3.3430E+04 4. 2017500300064 7.992 2.5350E+04 4. 2017500300065 8.386 1.8520E+04 7. 2017500300066 8.791 1.3530E+04 7. 2017500300067 9.442 8.1480E+03 7. 2017500300068 10.43 3.8420E+03 27. 2017500300069 11.43 1.9140E+03 27. 2017500300070 12.43 6.7700E+02 27. 2017500300071 13.46 3.8600E+02 27. 2017500300072 14.45 2.2500E+02 27. 2017500300073 ENDDATA 56 0 2017500300074 ENDSUBENT 73 0 2017500399999 SUBENT 20175004 20110827 22272017500400001 BIB 5 12 2017500400002 REACTION (92-U-235(N,F)0-NN-1,PR,KE,,,DERIV) 2017500400003 ANALYSIS .Fission neutron spectrum data were fitted to a 2017500400004 Watt spectrum: N(E)= K(exp(-E/A))*(sinh(SQRT(B*E))), 2017500400005 where A=(1.020+-0.012) MeV, B=(2.319+-0.137) 1/(MeV). 2017500400006 E-avg = (3/2+B/4/A)/A 2017500400007 REL-REF (A,14099002,B.E.Watt,J,PR,87,1037,1952) 2017500400008 (A,20385002,M.M.Islam+,J,NSE,50,108,1973) 2017500400009 (D,13824001,L.Cranberg+,J,PR,103,662,1956) 2017500400010 STATUS (TABLE) Data taken from Table IV in the journal 2017500400011 NSE,62,(4),695,1977 2017500400012 (DEP,20175003) 2017500400013 ERR-ANALYS (DATA-ERR) No further explanation. 2017500400014 ENDBIB 12 0 2017500400015 NOCOMMON 0 0 2017500400016 DATA 2 1 2017500400017 DATA DATA-ERR 2017500400018 MEV MEV 2017500400019 2.028 0.030 2017500400020 ENDDATA 3 0 2017500400021 ENDSUBENT 20 0 2017500499999 ENDENTRY 4 0 2017599999999