ENTRY 30269 20081203 31323026900000001 SUBENT 30269001 20081203 31323026900100001 BIB 14 36 3026900100002 INSTITUTE (3RUMBUC) 3026900100003 REFERENCE (R,IFA-NR-41,1972) Theoretical paper, graph only. 3026900100004 AUTHOR (I.M.Mihailescu,M.Petrascu) 3026900100005 TITLE Excitation function of the U-235 fission cross-section 3026900100006 in the energy range 0.017 eV to 0.15 eV. 3026900100007 EXP-YEAR (1972) 3026900100008 INC-SOURCE (REAC) VVR-S reactor at Bucharest 3026900100009 METHOD (TOF) Time of flight. 3026900100010 For each energy group of neutrons, the ratio 3026900100011 n-fis(E)/n-gam(E) was determined, where= 3026900100012 .N-fis(E) is the number of events detected by the 3026900100013 fission chamber, 3026900100014 .N-gam(E) is the number of events detected by the NaI3026900100015 spectrometer which counted the 447.4 keV gamma 3026900100016 rays of Li-7 (from B-10(n,alfa)Li-7). 3026900100017 The fission cross-section sig(E) for each energy group3026900100018 was determined using the following relation= 3026900100019 sig(E) = sig(0)*(n-fis(E)/n-gam(E))/(n-fis(0)/n-gam(0))3026900100020 where sig(0), n-fis(0) and n-gam(0) are the values at 3026900100021 2200 m/sec. 3026900100022 DETECTOR (FISCH) Fission chamber 3026900100023 (NAICR) Na-I spectrometer 3026900100024 MONITOR (92-U-235(N,F),,SIG) 3026900100025 For the absolute determination of the 3026900100026 U-235 fission cross-section for 2200m/sec neutrons used3026900100027 here as standard, see IFA-NR-47-1973 and entry 30140. 3026900100028 MONIT-REF (30140002,C.Borcea+,R,IFA-NR-47-1973,1973) 3026900100029 PART-DET (FF) Fission fragments 3026900100030 COMMENT A single-fission channel multilevel fit to the fission 3026900100031 cross-section was performed 3026900100032 STATUS (TABLE) Data from private communication 3026900100033 (Mihailescu's letter from September 1973) 3026900100034 (APRVD) Approved by Mihailescu (29 Nov 1974) 3026900100035 HISTORY (19740614C) CA. 3026900100036 (19741218U) CA. -Status 'Aprvd' added. 3026900100037 (20080423A) BIB section updated 3026900100038 ENDBIB 36 0 3026900100039 COMMON 2 3 3026900100040 EN-NRM MONIT 3026900100041 EV B 3026900100042 0.0253 5.8170E+02 3026900100043 ENDCOMMON 3 0 3026900100044 ENDSUBENT 43 0 3026900199999 SUBENT 30269002 20081203 31323026900200001 BIB 2 2 3026900200002 REACTION (92-U-235(N,F),,SIG) 3026900200003 HISTORY (20080430S) Dataset was restored. 3026900200004 ENDBIB 2 0 3026900200005 NOCOMMON 0 0 3026900200006 DATA 2 40 3026900200007 EN DATA 3026900200008 EV B 3026900200009 0.1528 195.64 3026900200010 0.1384 200.67 3026900200011 0.1259 217.17 3026900200012 0.1150 235.40 3026900200013 0.1055 247.95 3026900200014 0.0969 257.26 3026900200015 0.0897 267.23 3026900200016 0.0891 283.85 3026900200017 0.0772 300.40 3026900200018 0.0719 319.03 3026900200019 0.0671 311.16 3026900200020 0.0628 340.76 3026900200021 0.0589 360.90 3026900200022 0.0554 374.00 3026900200023 0.0532 383.91 3026900200024 0.0492 401.06 3026900200025 0.0464 405.71 3026900200026 0.0439 423.67 3026900200027 0.0416 435.44 3026900200028 0.0395 455.75 3026900200029 0.0375 466.86 3026900200030 0.0357 465.83 3026900200031 0.0340 488.04 3026900200032 0.0324 513.29 3026900200033 0.0310 495.55 3026900200034 0.0296 538.38 3026900200035 0.0283 555.36 3026900200036 0.0267 569.64 3026900200037 0.0260 575.27 3026900200038 0.0249 552.70 3026900200039 0.0239 596.90 3026900200040 0.0230 614.09 3026900200041 0.0221 625.53 3026900200042 0.0213 656.81 3026900200043 0.0205 657.26 3026900200044 0.0198 694.26 3026900200045 0.0191 689.23 3026900200046 0.0184 720.02 3026900200047 0.0178 711.38 3026900200048 0.0172 725.83 3026900200049 ENDDATA 42 0 3026900200050 ENDSUBENT 49 0 3026900299999 SUBENT 30269003 20081203 31323026900300001 BIB 3 3 3026900300002 REACTION (92-U-235(N,F),,SIG,,RTE) 3026900300003 ERR-ANALYS (ERR-S) Statistical errors 3026900300004 HISTORY (20080430S) Dataset was restored. 3026900300005 ENDBIB 3 0 3026900300006 NOCOMMON 0 0 3026900300007 DATA 3 40 3026900300008 EN DATA ERR-S 3026900300009 EV B*RT-EV B*RT-EV 3026900300010 0.1528 76.02 1.89 3026900300011 0.1384 74.20 1.72 3026900300012 0.1259 76.59 1.56 3026900300013 0.1150 79.36 1.46 3026900300014 0.1055 80.06 1.36 3026900300015 0.0969 79.60 1.27 3026900300016 0.0897 79.55 1.21 3026900300017 0.0891 81.33 1.18 3026900300018 0.0772 82.96 1.16 3026900300019 0.0719 85.03 1.15 3026900300020 0.0671 80.14 1.10 3026900300021 0.0628 84.90 1.14 3026900300022 0.0589 87.08 1.14 3026900300023 0.0554 87.48 1.16 3026900300024 0.0532 88.03 1.18 3026900300025 0.0492 88.39 1.19 3026900300026 0.0464 86.91 1.21 3026900300027 0.0439 88.28 1.23 3026900300028 0.0416 88.33 1.25 3026900300029 0.0395 90.05 1.30 3026900300030 0.0375 89.92 1.33 3026900300031 0.0357 87.52 1.36 3026900300032 0.0340 89.49 1.41 3026900300033 0.0324 91.91 1.47 3026900300034 0.0310 86.70 1.47 3026900300035 0.0296 92.09 1.57 3026900300036 0.0283 92.91 1.62 3026900300037 0.0267 93.24 1.70 3026900300038 0.0260 92.21 1.75 3026900300039 0.0249 86.77 1.75 3026900300040 0.0239 91.82 1.83 3026900300041 0.0230 92.60 1.91 3026900300042 0.0221 92.50 1.99 3026900300043 0.0213 95.28 2.10 3026900300044 0.0205 93.57 2.18 3026900300045 0.0198 97.02 2.32 3026900300046 0.0191 94.59 2.35 3026900300047 0.0184 97.07 2.49 3026900300048 0.0178 94.25 2.55 3026900300049 0.0172 94.52 2.68 3026900300050 ENDDATA 42 0 3026900300051 ENDSUBENT 50 0 3026900399999 ENDENTRY 3 0 3026999999999