ENTRY 23085 20090921 22182308500000001 SUBENT 23085001 20090921 22182308500100001 BIB 12 40 2308500100002 TITLE .Determination of the neutron resonance parameters 2308500100003 for 209Bi from new capture and transmission 2308500100004 measurements at GELINA 2308500100005 AUTHOR (A.Borella, F.Gunsing, S.Kopecky, P.Mutti, 2308500100006 P.Schillebeeckx, P.Siegler, R.Wynants) 2308500100007 INSTITUTE (2FR SAC) CEA DAPNIA/SPhN F-91911 Gif-sur-Yvette 2308500100008 Cedex, France. A.Borella, corresponding author, 2308500100009 Email alessandroborella@yahoo.it; F.Gunsing. 2308500100010 (2ZZZGEL) EC-JRC-IRMM, Geel, Belgium. S.Kopecky, 2308500100011 P.Schillebeeckx, P.Siegler, R.Wynants. 2308500100012 (2FR ILL) Institut Laue-Langevin, Grenoble, France. 2308500100013 P.Mutti. 2308500100014 REFERENCE (C,2006VANCOU,,(B043),200606) Main reference 2308500100015 REL-REF (R,23084001,A.Borella+,C,2006VANCOU,,(B042),200606) 2308500100016 (I,,D.Tronc+,J,NIM/A,228,217,1985) GELINA - the new 2308500100017 pulse compression system for intense relativistic 2308500100018 electron beams 2308500100019 FACILITY (LINAC,2ZZZGEL) Linear accelerator GELINA of the 2308500100020 Institute for Reference Materials and Measurements 2308500100021 at Geel in Belgium. Bunched electrons of 1 ns width, 2308500100022 repetition rate 800 Hz, 70 microA average electron 2308500100023 current, average electron energy 100 MeV 2308500100024 INC-SOURCE (PHOTO) Gamma-n and gamma-fission reactions 2308500100025 METHOD (TOF) Time of flight. Transmission measurements were 2308500100026 carried out at 30 m and 50 m flight paths. 2308500100027 The capture measurements were performed at a 30 m 2308500100028 and 60 m flight path 2308500100029 (PHD) The sample dependent pulse height weighting 2308500100030 function applied to ensure that the efficiency for 2308500100031 a neutron capture event was independent from the 2308500100032 gamma-ray cascade 2308500100033 DETECTOR (IOCH) B-10 ionization chamber was used to determine 2308500100034 the shape of the neutron flux. 2308500100035 ANALYSIS (SHAPE) The resonance shape analysis was performed 2308500100036 with the most recent version of the REFIT code 2308500100037 CORRECTION .Direct correction for the neutron sensitivity of the 2308500100038 capture detection system and accounts for the 2308500100039 influence of the neutron attenuation in the sample 2308500100040 on the weighted response. 2308500100041 HISTORY (20090921C) S.M. 2308500100042 ENDBIB 40 0 2308500100043 NOCOMMON 0 0 2308500100044 ENDSUBENT 43 0 2308500199999 SUBENT 23085002 20090921 22182308500200001 BIB 5 21 2308500200002 REACTION (83-BI-209(N,TOT),,TRN) Transmission 2308500200003 METHOD (TOF) Transmission measurements at 26.5 m and 49.6 m 2308500200004 flight path 2308500200005 (FNB) 2308500200006 1.A 0.0129 at/b thick B-10 anti-overlap filter. 2308500200007 "Black" resonance filters (S, Na, Bi and Co) were 2308500200008 used in order to deduce the background 2308500200009 2.A 0.04 at/b thick B-10 anti-overlap filter together 2308500200010 with a thick lead sample 10 m from neutron producing 2308500200011 target. S and Na black resonance filters for 2308500200012 background estimation 2308500200013 DETECTOR (BF3) Two BF3 proportional counters were used to 2308500200014 monitor the neutron flux of the accelerator and to 2308500200015 normalize the spectra. 2308500200016 (GLASD) Li-6 glass scintillator NE 912 2308500200017 1-110 mm effective diameter 12.7 mm thick mounted in an2308500200018 AL canning 2308500200019 2-101.6 effective diameter 6.35 mm thick 2308500200020 SAMPLE .Metallic bismuth sample 2308500200021 STATUS (UNOBT) Data not present. Request sent to A.Borella 2308500200022 2009-09-04 2308500200023 ENDBIB 21 0 2308500200024 COMMON 2 3 2308500200025 EN-MIN EN-MAX 2308500200026 EV KEV 2308500200027 800. 150. 2308500200028 ENDCOMMON 3 0 2308500200029 NODATA 0 0 2308500200030 ENDSUBENT 29 0 2308500299999 SUBENT 23085003 20090921 22182308500300001 BIB 5 14 2308500300002 REACTION (83-BI-209(N,G)83-BI-210,,SIG) Capture cross section 2308500300003 METHOD (TOF) Capture measurements, flight path is 28.7 2308500300004 and 58.6 m 2308500300005 (FNB) "Black" sulfur 102.7 keV resonance filter to 2308500300006 monitor amplitude of the background 2308500300007 DETECTOR (SCIN) Four C6D6 scintillation detectors NE230 for 2308500300008 capture gamma measurements 2308500300009 SAMPLE -Metallic bismuth sample 2308500300010 1.Disc of 19.95 mm diameter 1 mm thick (2.76E-3 at/b) 2308500300011 for flight path 28.7 m 2308500300012 2.Disc of 80 mm diameter, 3.0 mm thick (8.34E-3 at/b) 2308500300013 for flight path 58.6 m. 2308500300014 STATUS (UNOBT) Data not present. Request sent to A.Borella 2308500300015 2009-09-04 2308500300016 ENDBIB 14 0 2308500300017 NOCOMMON 0 0 2308500300018 NODATA 0 0 2308500300019 ENDSUBENT 18 0 2308500399999 SUBENT 23085004 20090921 22182308500400001 BIB 5 29 2308500400002 REACTION 1(83-BI-209(N,EL),,WID) 2308500400003 2(83-BI-209(N,G),,ARE) 2308500400004 METHOD (TOF) Transmission measurements at 26.5 m and 49.6 m 2308500400005 flight path 2308500400006 (FNB) 2308500400007 1.A 0.0129 at/b thick B-10 anti-overlap filter. 2308500400008 "Black" resonance filters (S, Na, Bi and Co) were 2308500400009 used in order to deduce the background 2308500400010 2.A 0.04 at/b thick B-10 anti-overlap filter together 2308500400011 with a thick lead sample 10 m from neutron producing 2308500400012 target. S and Na black resonance filters for 2308500400013 background estimation 2308500400014 DETECTOR (BF3) Two BF3 proportional counters were used to 2308500400015 monitor the neutron flux of the accelerator and to 2308500400016 normalize the spectra. 2308500400017 (GLASD) Li-6 glass scintillator NE 912 2308500400018 1-110 mm effective diameter 12.7 mm thick mounted in an 2308500400019 AL canning 2308500400020 2-101.6 effective diameter 6.35 mm thick 2308500400021 SAMPLE .Metallic bismuth sample 2308500400022 1-0.3 mm thick (8.84E-4 atoms/barn) placed at 9.1 m from2308500400023 the neutron producing target in an automatic sample 2308500400024 changer, flight path 26.5 m 2308500400025 2-4. mm thick (1.08E-2 at/b) placed at 25 m from neutron2308500400026 producing target, flight path 49.6 m. 2308500400027 STATUS (TABLE) .Text of 2006VANCOU,,(B043), page 2 2308500400028 (PRELM) By the authors. Request sent to A.Borella 2308500400029 2009-09-04 2308500400030 (DEP,23085002) 2308500400031 ENDBIB 29 0 2308500400032 COMMON 1 3 2308500400033 EN-RES-MAX 2308500400034 KEV 2308500400035 40. 2308500400036 ENDCOMMON 3 0 2308500400037 NODATA 0 0 2308500400038 ENDSUBENT 37 0 2308500499999 SUBENT 23085005 20090921 22182308500500001 BIB 5 25 2308500500002 REACTION (83-BI-209(N,G),,ARE) Resonance area 2308500500003 METHOD (TOF) capture measurements, flight path is 28.7 2308500500004 and 58.6 m 2308500500005 (FNB) "Black" sulfur 102.7 keV resonance filter to 2308500500006 monitor amplitude of the background 2308500500007 1.A 0.018 at/b thick B-10 anti-overlap filter. 2308500500008 - for 28.7 flight path 2308500500009 2.A 0.0416 at/b thick B-10 anti-overlap filter to 2308500500010 - for 58.6 m flight path 2308500500011 DETECTOR (SCIN) Four C6D6 scintillation detectors NE230 for 2308500500012 capture gamma measurements 2308500500013 (IOCH) Frisch-gridded ionization chamber for 2308500500014 neutron spectrum shape determination. 2308500500015 1.Loaded with two back-to-back layers of 40E-6 gram/cm2 2308500500016 B-10 layers each - for 28.7 m flight path 2308500500017 2.Triple chamber loaded with three back-to-back layers 2308500500018 of 40E-6 gram/cm2 B-10 each - for 58.6 m flight path 2308500500019 SAMPLE -Metallic bismuth sample 2308500500020 1.Disc of 19.95 mm diameter 1 mm thick (2.76E-3 at/b) 2308500500021 for flight path 28.7 m 2308500500022 2.Disc of 80 mm diameter, 3.0 mm thick (8.34E-3 at/b) 2308500500023 for flight path 58.6 m. 2308500500024 STATUS (UNOBT) Data not present. Request sent to A.Borella 2308500500025 2009-09-04 2308500500026 (DEP,23085003) 2308500500027 ENDBIB 25 0 2308500500028 NOCOMMON 0 0 2308500500029 NODATA 0 0 2308500500030 ENDSUBENT 29 0 2308500599999 ENDENTRY 5 0 2308599999999