ENTRY 23139 20130110 22342313900000001 SUBENT 23139001 20130110 22342313900100001 BIB 14 82 2313900100002 TITLE Transmission and capture measurement for 241Am at 2313900100003 GELINA 2313900100004 AUTHOR (C.Lampoudis, S.Kopecky, A.Plompen, P.Schillebeeckx, 2313900100005 P.Siegler, F.Gunsing, C.Sage, O.Bouland) 2313900100006 INSTITUTE (2ZZZGEL,2FR SAC,2FR CAD) 2313900100007 REFERENCE (J,KPS,59,1785,2011) ND2010 Conf.Proc. paper #1310, 2313900100008 REL-REF (M,,D.B.Syme,J,NIM,198,357,1982) 2313900100009 Details of black resonances technique 2313900100010 (I,,A.Borella+,J,NIM/A,577,626,2007) 2313900100011 Details of C6D6 detectors and pulse-height-weighting 2313900100012 technique 2313900100013 (M,,D.Ene+,J,NIM/A,618,54,201006) 2313900100014 #doi:10.1016/j.nima.2010.03.005 2313900100015 Details of Monte-Carlo simulation of spectrometer 2313900100016 setup 2313900100017 FACILITY (LINAC,2ZZZGEL) GELINA at IRMM . 2313900100018 INC-SOURCE (PHOTO) Electrons hits a mercury cooled uranium target 2313900100019 and Bremsstrahlung is produced. 2313900100020 Consequently neutrons with energies of a few 2313900100021 MeV are created by (gamma,xn)-reactions and 2313900100022 photofission. 2313900100023 Two beryllium containers,filled with water, mounted 2313900100024 above and below the neutron production target, are used2313900100025 as moderator. 2313900100026 SAMPLE Sol-gel technique was used for sample preparation. 2313900100027 In approximately 3 g of Y2O3, which was used as the 2313900100028 sol-gel matrix, approximately 320 mg of Am was infused.2313900100029 Much higher degree of homogeneity will be achieved with2313900100030 such a sample type. 2313900100031 METHOD Background was estimated using the black resonance 2313900100032 technique (Ag, Co and Na filters). 2313900100033 (TOF) Flight path length was calibrated using the 2313900100034 energy of the 6.674 eV resonance of U-238 resonance 2313900100035 as given in ENDF/B-VII evaluated data file. 2313900100036 Effective flight path length of (26.444+-0.006) m. 2313900100037 1(TRN) Transmission measurement. 2313900100038 - Flight path 2 of GELINA, moderator at an angle of 2313900100039 9 degrees with its normal, flight path length 26.45m. 2313900100040 Beam diameter approximately 2 cm, using combination of 2313900100041 lithium-carbonate, copper and nickel collimators. 2313900100042 Sample was positioned at a distance of approximately 2313900100043 10 m from the neutron source. 2313900100044 (COINC) To separate a valid neutron event from the 2313900100045 photomultiplier noise, coincidence between the signals 2313900100046 of both tubes was imposed. 2313900100047 Time resolution of 0.5 ns. 2313900100048 Measurements of the sample and open beam were cycled 2313900100049 every 20 minutes. 2313900100050 2 Capture measurement. 2313900100051 -Flight path length of 10 m with the beam diameter at 2313900100052 the sample station approximately 75 mm using lithium- 2313900100053 carbonate plus resin, copper and lead collimators. 2313900100054 Pulse height weighing technique was used to create 2313900100055 detector response proportional to the energy of the 2313900100056 registered gammas. 2313900100057 Am sample was shielded from the detectors by cylinder 2313900100058 of inner diameter approximately 13 cm, length 20 cm, 2313900100059 thickness of approximately 1 cm, produced of antimony 2313900100060 free lead. 2313900100061 DETECTOR Neutron energy dependence of the resolution function 2313900100062 was determined in a Monte Carlo simulation of the 2313900100063 spectrometer setup. 2313900100064 (BF3) Neutron flux is monitored by BF3 counters . 2313900100065 1(GLASD) 1.27 cm thick lithium-glass scintillator with 2313900100066 diameter of approximately 10 cm viewed by two 2313900100067 photomultiplier tubes EMI9823QKB - for neutron 2313900100068 detection. 2313900100069 2(SCIN) Two cylindrical C6D6 detectors (NE230), mounted 2313900100070 at an angle of 125degrees directly on quartz-windowed 2313900100071 photomultipliers. 2313900100072 ANALYSIS The software code AGS (Analysis of Geel Spectra, 2313900100073 C. Bastian+. Physor-2006, ANS Topical Meeting on 2313900100074 Reactor Physics, Vancouver, Canada,2006, paper C013, 2313900100075 was used to derive the transmission and the capture 2313900100076 yields from the registered data. 2313900100077 CORRECTION Dead-time correction, background subtraction and other 2313900100078 by AGS code (see ANALYSIS). 2313900100079 STATUS (PRELM) Preliminary data 2313900100080 HISTORY (20110722C) M.M. 2313900100081 Request of data sent 22-07-2011 to Peter Schillebeeckx2313900100082 peter.schillebeeckx@e.europa.eu . 2313900100083 (20130110U) On. INC-SOURCE: BRST removed 2313900100084 ENDBIB 82 0 2313900100085 NOCOMMON 0 0 2313900100086 ENDSUBENT 85 0 2313900199999 SUBENT 23139002 20110722 22282313900200001 BIB 3 4 2313900200002 REACTION (95-AM-241(N,TOT),,TRN) Transmission. 2313900200003 STATUS Data are on Fig.3 of J,KPS,58,1785,2011. 2313900200004 ADD-RES (COMP) Comparison with REFIT code (M.Moxon) 2313900200005 calculations. 2313900200006 ENDBIB 4 0 2313900200007 NOCOMMON 0 0 2313900200008 NODATA 0 0 2313900200009 ENDSUBENT 8 0 2313900299999 SUBENT 23139003 20130110 22342313900300001 BIB 4 4 2313900300002 REACTION (95-AM-241(N,G)95-AM-242,,RYL) Capture yields 2313900300003 STATUS (UNOBT) Figs.2,4 of J,Kor.Phys.Soc.58(2011)1785 2313900300004 ADD-RES (COMP) Comparison with REFIT code calculations 2313900300005 HISTORY (20130110A) On. REACTION: ,TRN,,RYL -> ,RYL 2313900300006 ENDBIB 4 0 2313900300007 NOCOMMON 0 0 2313900300008 NODATA 0 0 2313900300009 ENDSUBENT 8 0 2313900399999 SUBENT 23139004 20110722 22282313900400001 BIB 3 9 2313900400002 REACTION 1(95-AM-241(N,0),,EN) Resonance energy. 2313900400003 2(95-AM-241(N,TOT),,WID) 2313900400004 REL-REF (A,,M.Jandel+,J,PR/C,78,034609,2008) 2313900400005 Energies are in good agreement with the values of 2313900400006 M.Jandel+ (0.308, 0.574 and 1.276 eV). 2313900400007 Total widths are slightly smaller than the values of 2313900400008 M.Jandel+ (46.9,47.3 and 47.9 meV). 2313900400009 STATUS (TABLE) Text, last page of J,KPS,58,1785,2011. 2313900400010 (PRELM) Preliminary results. 2313900400011 ENDBIB 9 0 2313900400012 NOCOMMON 0 0 2313900400013 DATA 2 3 2313900400014 DATA 1DATA 2 2313900400015 EV MILLI-EV 2313900400016 0.306 42. 2313900400017 0.574 41. 2313900400018 1.272 42. 2313900400019 ENDDATA 5 0 2313900400020 ENDSUBENT 19 0 2313900499999 ENDENTRY 4 0 2313999999999