ENTRY 23342 20180119 22602334200000001 SUBENT 23342001 20180119 22602334200100001 BIB 14 70 2334200100002 TITLE Fission fragment yield distribution in the heavy-mass 2334200100003 region from the 239Pu (nth,f) reaction 2334200100004 AUTHOR (Y.K.Gupta,D.C.Biswas,O.Serot,D.Bernard,O.Litaize, 2334200100005 S.Julien-Laferriere,A.Chebboubi,G.Kessedjian,C.Sage, 2334200100006 A.Blanc,H.Faust,U.Koester,A.Ebran,L.Mathieu, 2334200100007 A.Letourneau,T.Materna,S.Panebianco) 2334200100008 REFERENCE (J,PR/C,96,014608,2017) 2334200100009 Three independent experiments described. 2334200100010 INSTITUTE (2FR ILL) A.Blanc,H.Faust,U.Koester 2334200100011 (3INDTRM) Y.K.Gupta,D.C.Biswas 2334200100012 (2FR CAD) O.Serot,D.Bernard,O.Litaize 2334200100013 (2FR GRE) S.Julien-Laferriere,A.Chebboubi,G.Kessedjian,2334200100014 C.Sage 2334200100015 (2FR BRC) A.Ebran 2334200100016 (2FR GRA) L.Mathieu 2334200100017 (2FR SAC) A.Letourneau,T.Materna,S.Panebianco 2334200100018 FACILITY (REAC,2FR ILL) High-flux reactor 2334200100019 INC-SOURCE (REAC) Thermal neutron flux 5.E+14 n/(cm2*sec) . 2334200100020 SAMPLE Thickness Size Ni foil 2334200100021 microg/cm2 cm2 micrometer 2334200100022 1. 107. 0.8 x 7. 0.25 2334200100023 2. 300. 0.8 x 7. 0.25 2334200100024 3. 103. 1. x 7. 0.25 2334200100025 (94-PU-239,ENR=0.995) Pu-239 oxide on Ti backing of 2334200100026 70mm x 10mm x 0.5mm . Mass 103 - 300 microg. 2334200100027 It was covered by a diaphragm, holding Ni foil, to 2334200100028 reduce the self-sputtering. 2334200100029 Typical mass resolution A/deltaA ~=400 2334200100030 METHOD (EDE) 2334200100031 DETECTOR (TELES) Gas-ionization dE-E telescope at the exit slit 2334200100032 of spectrometer. 2334200100033 (SPEC) Lohengrin recoil-mass spectrometer for fission 2334200100034 fragments. 2334200100035 REL-REF (I,,P.Ambruster+,J,NIM,139,213,1976) 2334200100036 (I,,G.Fioni+,J,NIM,332,175,1993) 2334200100037 Details of Lohengrin spectrometer . 2334200100038 ANALYSIS The yield, Y(A,q,Ek), corresponding to a particular 2334200100039 mass number A, ionic charge q, and kinetic energy Ek, 2334200100040 is extracted from the two-dimensional plot of dE vs E. 2334200100041 Two approaches were used: 2334200100042 - experiments 1 and 2 : 2334200100043 kinetic energy distribution was assumed to be 2334200100044 independent from ionic charge distribution; 2334200100045 q distribution was obtained at optimal Ek using 2334200100046 formula (1); 2334200100047 Y(a) was obtained by formula (2); 2334200100048 Gaussians fits to the data were applied; 2334200100049 - experiment 3 : 2334200100050 pure statistical analysis (instead of Gaussian fits);2334200100051 the correlation between kinetic energy distributions 2334200100052 and ionic charge distributions is deduced from the 2334200100053 data and taken into account in the uncertainty 2334200100054 analysis; 2334200100055 typically from 2 up to 4 scans across ionic charge 2334200100056 at different Ek were performed and from 2 up to 4 2334200100057 mass measurements have been obtained and compared in 2334200100058 order to deduce a mean value per mass with a reduced 2334200100059 uncertainty. 2334200100060 Burn-up was taken into account using results of 2334200100061 measurement of the mass 136 yield, carried out 2334200100062 periodically (~ every 8hr), resulting in burn-up curve.2334200100063 CORRECTION Contributions from other Pu isotopes were negligible. 2334200100064 ERR-ANALYS (ERR-T) Total uncertainty, includes statistical error 2334200100065 and systematical components: 2334200100066 (ERR-1) Normalization 2334200100067 (ERR-2,,3.) The burn-up (strongly dependent of the 2334200100068 sample behavior); mainly governed by the uncertainty of2334200100069 the fit performed to reproduce the burnup curve. 2334200100070 HISTORY (20170710C) M.M. 2334200100071 (20180119U) On. FACILITY: (SPECM,2FR ILL) deleted. 2334200100072 ENDBIB 70 0 2334200100073 COMMON 1 3 2334200100074 ERR-1 2334200100075 PER-CENT 2334200100076 1. 2334200100077 ENDCOMMON 3 0 2334200100078 ENDSUBENT 77 0 2334200199999 SUBENT 23342002 20170710 22602334200200001 BIB 6 10 2334200200002 REACTION (94-PU-239(N,F)MASS,SEC,FY) Mass yields, normalized 2334200200003 with a corresponding sum on JEFF-3.1.1. 2334200200004 EXP-YEAR (2009) 2334200200005 REFERENCE (J,PR/C,84,034605,2011) First author A.Bail 2334200200006 METHOD Measured using the ionization chamber placed at the 2334200200007 focal plane of the Lohengrin spectrometer. 2334200200008 ERR-ANALYS (ERR-3,,2.) Uncertainty due to the assumption that Ek 2334200200009 and q distributions are independent of each other. 2334200200010 STATUS (TABLE) Table II of PR/C,96,014608,2017 2334200200011 This Subent superseds Subent 22984.005 2334200200012 ENDBIB 10 0 2334200200013 COMMON 1 3 2334200200014 EN-DUMMY 2334200200015 EV 2334200200016 0.0253 2334200200017 ENDCOMMON 3 0 2334200200018 DATA 3 25 2334200200019 MASS DATA ERR-T 2334200200020 NO-DIM PC/FIS PC/FIS 2334200200021 126. 0.298 0.015 2334200200022 127. 0.545 0.026 2334200200023 128. 0.953 0.045 2334200200024 129. 1.691 0.079 2334200200025 130. 2.726 0.128 2334200200026 131. 3.830 0.180 2334200200027 132. 5.073 0.238 2334200200028 133. 7.182 0.373 2334200200029 134. 6.844 0.335 2334200200030 135. 7.550 0.393 2334200200031 136. 7.272 0.451 2334200200032 137. 6.874 0.419 2334200200033 138. 6.058 0.285 2334200200034 139. 5.680 0.273 2334200200035 140. 4.785 0.435 2334200200036 141. 5.103 0.464 2334200200037 142. 4.586 0.463 2334200200038 143. 4.049 0.328 2334200200039 144. 4.019 0.326 2334200200040 145. 3.243 0.230 2334200200041 146. 2.636 0.137 2334200200042 147. 2.248 0.205 2334200200043 148. 1.641 0.149 2334200200044 149. 1.174 0.106 2334200200045 150. 0.877 0.107 2334200200046 ENDDATA 27 0 2334200200047 ENDSUBENT 46 0 2334200299999 SUBENT 23342003 20170710 22602334200300001 BIB 4 13 2334200300002 REACTION (94-PU-239(N,F)MASS,SEC,FY) Mass yields, normalized 2334200300003 with a corresponding sum on JEFF-3.1.1. 2334200300004 EXP-YEAR (2011) 2334200300005 ERR-ANALYS (ERR-3,,2.) Uncertainty due to the assumption that Ek 2334200300006 and q distributions are independent of each other. 2334200300007 STATUS (TABLE) Table II of PR/C,96,014608,2017 2334200300008 See also Fig.2 on page 403 in: 2334200300009 Y.K.Gupta,D.C.Biswas,U.Koester,O.Serot,A.Chatterjee,2334200300010 S.Kailas,in Proceedings of the Department of Atomic 2334200300011 Energy Symposium on Nucl. Phys., edited by S.R.Jain, 2334200300012 P.Shukla,A.Chatterjee,V.M.Datar (Department of Atomic 2334200300013 Energy,Mumbai, 2012), Vol. 57, p. 402, 2334200300014 www.sympnp.org/proceedings. 2334200300015 ENDBIB 13 0 2334200300016 COMMON 1 3 2334200300017 EN-DUMMY 2334200300018 EV 2334200300019 0.0253 2334200300020 ENDCOMMON 3 0 2334200300021 DATA 3 14 2334200300022 MASS DATA ERR-T 2334200300023 NO-DIM PC/FIS PC/FIS 2334200300024 132. 5.470 0.259 2334200300025 133. 7.213 0.337 2334200300026 134. 7.827 0.366 2334200300027 135. 7.496 0.349 2334200300028 136. 6.630 0.315 2334200300029 137. 6.908 0.322 2334200300030 138. 6.053 0.285 2334200300031 139. 5.659 0.270 2334200300032 140. 5.374 0.262 2334200300033 141. 5.341 0.257 2334200300034 142. 4.310 0.216 2334200300035 143. 4.330 0.211 2334200300036 144. 3.416 0.170 2334200300037 145. 2.940 0.149 2334200300038 ENDDATA 16 0 2334200300039 ENDSUBENT 38 0 2334200399999 SUBENT 23342004 20170710 22602334200400001 BIB 3 9 2334200400002 REACTION (94-PU-239(N,F)MASS,SEC,FY) Mass yields, normalized 2334200400003 with a corresponding sum on JEFF-3.1.1. 2334200400004 EXP-YEAR (2014) 2334200400005 STATUS (TABLE) Table II of PR/C,96,014608,2017 2334200400006 See also fig.on page 12 in : 2334200400007 A.Chebboubi,G.Kessedjian,S.Julien-Laferriere,C.Sage, 2334200400008 O.Meplan,H.Faust,U.Koester,A.Blanc,P.Mutti,O.Serot et a2334200400009 JEF/DOC 1717 (OECD/NEA, Paris, 2015), 2334200400010 JEFF-NEEDS workshop, Nov 30 - Dec 1 2015, Paris. 2334200400011 ENDBIB 9 0 2334200400012 COMMON 1 3 2334200400013 EN-DUMMY 2334200400014 EV 2334200400015 0.0253 2334200400016 ENDCOMMON 3 0 2334200400017 DATA 3 13 2334200400018 MASS DATA ERR-T 2334200400019 NO-DIM PC/FIS PC/FIS 2334200400020 130. 2.328 0.094 2334200400021 131. 3.496 0.138 2334200400022 132. 5.431 0.205 2334200400023 133. 7.153 0.278 2334200400024 134. 8.123 0.278 2334200400025 135. 8.112 0.444 2334200400026 136. 7.200 0.266 2334200400027 137. 7.537 0.389 2334200400028 138. 5.753 0.301 2334200400029 140. 4.465 0.326 2334200400030 141. 5.200 0.264 2334200400031 142. 3.741 0.146 2334200400032 143. 4.165 0.155 2334200400033 ENDDATA 15 0 2334200400034 ENDSUBENT 33 0 2334200499999 SUBENT 23342005 20170710 22602334200500001 BIB 4 11 2334200500002 REACTION (94-PU-239(N,F)MASS,SEC,FY) Mass yields mean values , 2334200500003 weighted by their standard deviations. 2334200500004 ANALYSIS Average values of three independent measurements. 2334200500005 MISC-COL (MISC) CHI**2 values calculated when two or three sets 2334200500006 of exp. data are available, showing that within three 2334200500007 standard deviations (confidence level at 99.5%), data 2334200500008 from the 3 experiments are consistent each other. 2334200500009 STATUS (TABLE) Table II of PR/C,96,014608,2017 2334200500010 (DEP,23342002) Experiment 1 2334200500011 (DEP,23342003) Experiment 2 2334200500012 (DEP,23342004) Experiment 3 2334200500013 ENDBIB 11 0 2334200500014 COMMON 1 3 2334200500015 EN-DUMMY 2334200500016 EV 2334200500017 0.0253 2334200500018 ENDCOMMON 3 0 2334200500019 DATA 4 25 2334200500020 MASS DATA ERR-T MISC 2334200500021 NO-DIM PC/FIS PC/FIS NO-DIM 2334200500022 126. 0.298 0.015 2334200500023 127. 0.545 0.026 2334200500024 128. 0.953 0.045 2334200500025 129. 1.691 0.079 2334200500026 130. 2.468 0.076 6.24 2334200500027 131. 3.619 0.109 2.16 2334200500028 132. 5.330 0.133 1.69 2334200500029 133. 7.178 0.186 0.02 2334200500030 134. 7.659 0.185 8.89 2334200500031 135. 7.672 0.225 1.34 2334200500032 136. 7.015 0.185 2.30 2334200500033 137. 7.089 0.214 1.91 2334200500034 138. 5.962 0.167 0.70 2334200500035 139. 5.669 0.192 0.00 2334200500036 140. 4.975 0.185 4.96 2334200500037 141. 5.249 0.171 0.26 2334200500038 142. 3.962 0.117 6.71 2334200500039 143. 4.201 0.117 0.64 2334200500040 144. 3.546 0.151 2.69 2334200500041 145. 3.029 0.125 1.22 2334200500042 146. 2.636 0.137 2334200500043 147. 2.248 0.205 2334200500044 148. 1.641 0.149 2334200500045 149. 1.174 0.106 2334200500046 150. 0.877 0.107 2334200500047 ENDDATA 27 0 2334200500048 ENDSUBENT 47 0 2334200599999 ENDENTRY 5 0 2334299999999