ENTRY 22906 20080317 21962290600000001 SUBENT 22906001 20080317 21962290600100001 BIB 13 55 2290600100002 TITLE Neutron capture and transmission measurements on 2290600100003 Rh-103 down to thermal energies. 2290600100004 INSTITUTE (2ZZZGEL) Brusegan, Borella, Sieglert, Schillebeeckx 2290600100005 (2FR SAT) Berthoumieux, Gunsing 2290600100006 (2UK UK ) Moxon, Hyde Copse, Marcham, United Kingdom 2290600100007 REFERENCE (C,2004SANTA,1,953,200410) 2290600100008 REL-REF (N,,D.Tronc+,J,NIM/A,228,217,1985) A more detailed 2290600100009 description of GELINA. 2290600100010 AUTHOR (A.Brusegan, E.Berthoumieux, A.Borella, F.Gunsing, 2290600100011 M.Moxon, P.Siegler, P.Schillebeeckx) 2290600100012 FACILITY (LINAC,2ZZZGEL) Spectrometer GELINA. 2290600100013 INC-SOURCE A Cd-filter was used to eliminate the neutrons of 2290600100014 previous bursts. 2290600100015 SAMPLE Two discs of metallic rhodium with thickness of 2290600100016 3.37E-04 at/b and 1.87E-03 at/b - for transmission. 2290600100017 1.87E-03 at/b thick metallic Rh-103 disc -for capture.2290600100018 METHOD (TOF) 2290600100019 Capture experiments, the flight path was 14.5 m. 2290600100020 Fixed Bi and Na 'black' resonance filters were used to2290600100021 reduce gamma background from source and background 2290600100022 could be monitored using 'black' resonance minima at 2290600100023 802. eV and 2.85 keV. 2290600100024 (TRN) Transmission experiments, flight path was 50 m. 2290600100025 Background was measured at 'black' resonances of 2290600100026 permanent filters of Cd, Au, Co and Na placed in 2290600100027 neutron beam.Signal to background ratio 85:1 at 4.9eV,2290600100028 115:1 at 130 eV, 30:1 at 2.85 keV. 2290600100029 MONITOR (45-RH-103(N,0),,EN) The data have been normalized 2290600100030 to the well-isolated and saturated Rh-103 2290600100031 resonance at 1.26-eV. 2290600100032 DETECTOR (SCIN) For the capture measurements-two C(6)D(6) 2290600100033 liquid scintillators NE230 of 10.0-cm diameter 2290600100034 and 7.5 cm height, placed at 90-degree with respect 2290600100035 to the direction of the neutron beam; 2290600100036 (IOCH) The shape of the neutron spectrum was measured 2290600100037 with a double Frisch-gridded ionization chamber 2290600100038 with two back-to-back layers of 43.5 microgram/cm**2 2290600100039 Boron-10 each. 2290600100040 (GLASD) For the transmission measurements - 2290600100041 The neutrons were detected by 6-mm-thick NE912 2290600100042 Li-6 glass scintillator; 2290600100043 (BF3) Two BF3 proportional counters were used to 2290600100044 monitor the stability of the accelerator and to 2290600100045 normalize the spectra to the total neutron intensity.2290600100046 CORRECTION Corrections for self-shielding in the ionization 2290600100047 chamber, and for the difference in neutron flux at the2290600100048 target positions, and for the ionization chamber were 2290600100049 carried out. Maximum dead-time correction for the 2290600100050 capture measurements are 10%. Correction to dead time 2290600100051 less 1.25% below 2.85 keV for transmission measurement.2290600100052 Correction for background. 2290600100053 HISTORY (20051021C) 2290600100054 (20051112A) Last corrections have been done. 2290600100055 (20080317A) M.M. Data units in SUBENT 002 were 2290600100056 corrected MEV into MILLI-EV.BIB information was added.2290600100057 ENDBIB 55 0 2290600100058 COMMON 1 3 2290600100059 MONIT 2290600100060 EV 2290600100061 1.26 2290600100062 ENDCOMMON 3 0 2290600100063 ENDSUBENT 62 0 2290600199999 SUBENT 22906002 20080317 21962290600200001 BIB 5 17 2290600200002 REACTION 1(45-RH-103(N,0),,EN) 2290600200003 2(45-RH-103(N,EL),,WID) S-wave resonance parameters. 2290600200004 ANALYSIS (SHAPE) The resonance parameters for Rh-103 were 2290600200005 obtained from a simultaneous shape analysis of the 2290600200006 capture (from 300 eV to 10millieV) and transmission 2290600200007 (from 300 eV to 0.5 eV) data using the REFIT-code. 2290600200008 The resonance energy and neutron width for each 2290600200009 resonance were determined in the simultaneous fit, 2290600200010 as well as an average radiation width average 2290600200011 =161.0+-0.2 milli-eV for all resonances, 2290600200012 independent of the resonance spin. 2290600200013 ERR-ANALYS (DATA-ERR) Not specified .The uncertainty as reported 2290600200014 by authors in table. 2290600200015 COMMENT Of Authors. Poor value of negative energy resonance are2290600200016 due to fact, that the resonance at 1.26 eV dominates 2290600200017 the cross section below about 1 eV. 2290600200018 STATUS (TABLE) Data taken from Table 1 of main reference. 2290600200019 ENDBIB 17 0 2290600200020 NOCOMMON 0 0 2290600200021 DATA 4 10 2290600200022 DATA 1DATA-ERR 1DATA 2DATA-ERR 2 2290600200023 EV EV MILLI-EV MILLI-EV 2290600200024 -16.1 52.8 1.8 10.2 2290600200025 1.25993 0.00006 0.4820 0.0004 2290600200026 48.829 0.005 0.583 0.013 2290600200027 68.347 0.012 0.189 0.007 2290600200028 95.712 0.008 2.59 0.052 2290600200029 154.243 0.007 64.7 0.47 2290600200030 187.070 0.010 38.8 0.35 2290600200031 253.861 0.016 36.4 0.54 2290600200032 272.203 0.017 61.3 0.68 2290600200033 289.810 0.022 19.8 0.50 2290600200034 ENDDATA 12 0 2290600200035 ENDSUBENT 34 0 2290600299999 SUBENT 22906003 20080317 21962290600300001 BIB 3 5 2290600300002 REACTION (45-RH-103(N,G)45-RH-104,,SIG) 2290600300003 ERR-ANALYS (DATA-ERR) Uncertainty mainly from systematic effects 2290600300004 such as normalization and shape of B-10(n,a) in 2290600300005 thermal-energy region. 2290600300006 STATUS Data taken from the text of main reference,p.956. 2290600300007 ENDBIB 5 0 2290600300008 NOCOMMON 0 0 2290600300009 DATA 3 1 2290600300010 EN DATA DATA-ERR 2290600300011 EV B B 2290600300012 0.0253 142.5 1.5 2290600300013 ENDDATA 3 0 2290600300014 ENDSUBENT 13 0 2290600399999 SUBENT 22906004 20080317 21962290600400001 BIB 4 9 2290600400002 REACTION (45-RH-103(N,G),,WID,,AV) 2290600400003 ANALYSIS (SHAPE) The resonance parameters for Rh-103 were 2290600400004 obtained from a simultaneous shape analysis of the 2290600400005 capture and transmission data using the REFIT-code. 2290600400006 The resonance energy and gamma width for each 2290600400007 resonance were determined in the simultaneous fit, 2290600400008 for all resonances, independent of the resonance spin.2290600400009 ERR-ANALYS (DATA-ERR) Not specified 2290600400010 STATUS Data taken from the text of main reference,p.955. 2290600400011 ENDBIB 9 0 2290600400012 NOCOMMON 0 0 2290600400013 DATA 3 1 2290600400014 EN-MAX DATA DATA-ERR 2290600400015 EV MILLI-EV MILLI-EV 2290600400016 300. 161.0 0.2 2290600400017 ENDDATA 3 0 2290600400018 ENDSUBENT 17 0 2290600499999 SUBENT 22906005 20080317 21962290600500001 BIB 3 5 2290600500002 REACTION (45-RH-103(N,G)45-RH-104,,SIG,,MXW,DERIV) 2290600500003 INC-SPECT Maxwell energy distribution 2290600500004 STATUS Data taken from the text of main reference, p.956. 2290600500005 (DEP,22906002) 2290600500006 (DEP,22906003) 2290600500007 ENDBIB 5 0 2290600500008 NOCOMMON 0 0 2290600500009 DATA 2 1 2290600500010 EN-MEAN DATA 2290600500011 EV B 2290600500012 0.0253 145.2 2290600500013 ENDDATA 3 0 2290600500014 ENDSUBENT 13 0 2290600599999 ENDENTRY 5 0 2290699999999