ENTRY 23025 20131213 22382302500000001 SUBENT 23025001 20131213 22382302500100001 BIB 17 48 2302500100002 TITLE Measurement of thermal neutron cross-section and 2302500100003 resonance integral for the 174Yb(n,gamma)175Yb 2302500100004 reaction by the cadmium ratio method 2302500100005 AUTHOR (M.Karadag, H.Yuecel) 2302500100006 INSTITUTE (2TUKGZU) Gazi University, Gazi Education Faculty, 2302500100007 Ankara, Turkey. M.Karadag, corresponding author, 2302500100008 Email: mkaradag@gazi.edu.tr 2302500100009 (2TUKTUK) Turkish Atomic Energy Authority, Besevler 2302500100010 Yerleskesi, Ankara, Turkey. H.Yuecel 2302500100011 REFERENCE (J,NIM/B,266,2549,2008) Main reference, data and 2302500100012 error structure are given 2302500100013 REL-REF (I,,H.Yuecel+,J,PR/C,76,034610,2007) H.Yuecel et al., 2302500100014 experimental details 2302500100015 (M,,H.Yuecel+,J,ANE,31,681,2004) - Determination of 2302500100016 thermal and epithermal neutron fluxes at the sample 2302500100017 irradiation position 2302500100018 METHOD (ACTIV) Activation 2302500100019 (CADMB) Cadmium ratio method 2302500100020 (SITA) Intermittent sample/monitor irradiation 2302500100021 MONITOR (25-MN-55(N,G)25-MN-56,,SIG) Obtained online from 2302500100022 evaluated data files JENDL-3.3 and ENDF/B-VI 2302500100023 MONIT-REF (,,3,JENDL-3.3,,2001) 2302500100024 DECAY-MON (25-MN-56,2.5789HR,DG,846.754,0.989) 2302500100025 DECAY-DATA (70-YB-175,4.185D,B-,470.,0.79, 2302500100026 DG,113.8,0.0387, 2302500100027 DG,282.5,0.0613, 2302500100028 DG,396.3,0.132) 2302500100029 INC-SOURCE (AM-BE) Three Am241-Be sources immersed in a large 2302500100030 paraffin block 2302500100031 INC-SPECT .Thermal neutron spectrum, mean energy not given 2302500100032 Thermal and epithermal neutron fluxes at the sample 2302500100033 irradiation position of the 241Am-Be neutron irradiator2302500100034 were measured to be (1.5 +- 0.2) x 10**4 and 2302500100035 (1.4 +- 0.1) x 10**3 /cm2/s, respectively 2302500100036 SAMPLE .Yb2-O3 and Mn-O2 oxides finely grained samples 2302500100037 diluted in AL2-O3 powder, filled in polystyrene tubes 2302500100038 with wall thickness 1 mm. 10 samples for manganese 2302500100039 and ten samples for ytterbium were prepared. 2302500100040 Content - 96.0% AL2-O3 + 4.0% Yb2-O3, and 2302500100041 96.6% AL2-O3 + 3.4% Mn-O2. Yb174 isotopic abundance 2302500100042 31.8% 2302500100043 CORRECTION .For particles attenuation and self-shielding in 2302500100044 samples 2302500100045 ERR-ANALYS (ERR-T) Total error 2302500100046 STATUS (TABLE) From Table 5 of NIM/B,266,2549,2008 2302500100047 HISTORY (20080705C) SM 2302500100048 (20130203U) SD: INC-SOURCE was corrected. 2302500100049 (20131213U) SD: DECAY-MON = 1.5789HR -> 2.5789HR 2302500100050 ENDBIB 48 0 2302500100051 NOCOMMON 0 0 2302500100052 ENDSUBENT 51 0 2302500199999 SUBENT 23025002 20080705 22012302500200001 BIB 3 29 2302500200002 REACTION (70-YB-174(N,G)70-YB-175,,SIG) Value for 2200 m/sec 2302500200003 neutron velocity 2302500200004 REL-REF (A,,S.I.KAFALA+,J,JRN,215,193,1997) 2302500200005 (A,,F.DE CORTE+,J,JRN,133,43,1989) 2302500200006 (D,,R.Wan Der Linden+,J,JRC,20,695,1974) R. Van Der 2302500200007 Linden et al., J.Radioanal.Nucl.Chem. 20 (1974) 695. 2302500200008 ERR-ANALYS .Total error is composed of the quadratic sum of 2302500200009 partial errors listed below 2302500200010 (ERR-S) Yb-174 statistical uncertainty at one sigma 2302500200011 confidence level 0.16 2302500200012 Uncertainty sources due to Uncertainties (%) 2302500200013 (ERR-1) Detection efficiency for Yb-174 2.6 2302500200014 (ERR-2) Mass of sample for Yb-174 0.01 2302500200015 (ERR-3) Half-life for Yb-174 0.03 2302500200016 (ERR-4) Isotopic abundance for Yb-174 sample 1.26 2302500200017 (ERR-5) Gamma-ray emission probability 2302500200018 for Yb-174 3.1 2302500200019 (ERR-6) Thermal neutron self-shielding factor 2302500200020 for Yb-174 0.8 2302500200021 (ERR-7) Statistical uncertainty for 55Mn 0.24 2302500200022 (ERR-8) Detection efficiency for 55Mn 2.8 2302500200023 (ERR-9) Mass of sample for 55Mn 0.01 2302500200024 (ERR-10) Half-life for 55Mn 0.004 2302500200025 (ERR-11) Gamma-ray emission probability 2302500200026 for 55Mn 0.3 2302500200027 (ERR-12) Thermal neutron self-shielding factor 2302500200028 for 55Mn 0.1 2302500200029 (ERR-13) Monitor thermal neutron cross-section 2302500200030 for 55Mn 0.75 2302500200031 ENDBIB 29 0 2302500200032 COMMON 15 9 2302500200033 ERR-S MONIT-ERR ERR-1 ERR-2 ERR-3 ERR-4 2302500200034 ERR-5 ERR-6 ERR-7 ERR-8 ERR-9 ERR-10 2302500200035 ERR-11 ERR-12 ERR-13 2302500200036 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2302500200037 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2302500200038 PER-CENT PER-CENT PER-CENT 2302500200039 0.16 2.92 2.6 0.01 0.03 1.26 2302500200040 3.1 0.8 0.24 2.8 0.01 0.004 2302500200041 0.3 0.1 0.75 2302500200042 ENDCOMMON 9 0 2302500200043 DATA 4 1 2302500200044 EN DATA ERR-T ERR-T 2302500200045 EV B B PER-CENT 2302500200046 0.025 126.5 6.6 4.31 2302500200047 ENDDATA 3 0 2302500200048 ENDSUBENT 47 0 2302500299999 SUBENT 23025003 20080705 22012302500300001 BIB 3 44 2302500300002 REACTION (70-YB-174(N,G)70-YB-175,,RI) 2302500300003 REL-REF (A,,S.I.KAFALA+,J,JRN,215,193,1997) 2302500300004 (A,,F.DE CORTE+,J,JRN,133,43,1989) 2302500300005 (D,,W.BOTHE,J,ZN,1,179,1946) W. Bothe, Z. Naturforsch. 2302500300006 1 (1946) 179. 2302500300007 ERR-ANALYS .Total error is quadratic sum of its constituents 2302500300008 listed below. Errors are the products of the Relative 2302500300009 uncertainty a1 and error propagation factor, a2. 2302500300010 a1(%) a2(%) Error=a1*a2,% 2302500300011 ------ ------ -------------- 2302500300012 a: 19.27 0.3575 6.89 2302500300013 b: 15.0 0.0533 0.80 2302500300014 c: 1.60 1.5774 2.52 2302500300015 d: 1.32 1.5315 2.02 2302500300016 e: 0.10 1.4844 0.15 2302500300017 f: 0.80 1.4844 1.19 2302500300018 g: 5.00 1.4844 7.42 2302500300019 h: 5.00 1.4844 7.42 2302500300020 i: 2.14 1.2326 2.64 2302500300021 j: 0.75 1.2326 0.92 2302500300022 k: 5.21 1.0000 5.21 2302500300023 l: 10.9 0.0606 0.66 2302500300024 m: 7.97 0.0073 0.06 2302500300025 (ERR-1) a: Alpha-shape parameter 2302500300026 (ERR-2) b: Cadmium cut-off energy 2302500300027 (ERR-3) c: Cadmium ratio of 56Mn 2302500300028 (ERR-4) d: Cadmium ratio of 175Yb 2302500300029 (ERR-5) e: Thermal neutron self-shielding factor 2302500300030 for Mn sample 2302500300031 (ERR-6) f: Thermal neutron self-shielding factor 2302500300032 for Yb sample 2302500300033 (ERR-7) g: Epithermal neutron self-shielding factor 2302500300034 for Mn sample 2302500300035 (ERR-8) h: Epithermal neutron self-shielding factor 2302500300036 for Yb sample 2302500300037 (ERR-9) i: Reference resonance integral cross-section 2302500300038 of 55Mn 2302500300039 (ERR-10) j: Reference thermal neutron cross section 2302500300040 of 55Mn 2302500300041 (ERR-11) k: Reference thermal neutron cross section 2302500300042 of 174Yb 2302500300043 (ERR-12) l: Effective resonance energy of 55Mn 2302500300044 (ERR-13) m: Effective resonance energy of 174Yb 2302500300045 .Total uncertainty, 14.33% 2302500300046 ENDBIB 44 0 2302500300047 COMMON 13 9 2302500300048 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 2302500300049 ERR-7 ERR-8 ERR-9 ERR-10 ERR-11 ERR-12 2302500300050 ERR-13 2302500300051 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2302500300052 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2302500300053 PER-CENT 2302500300054 6.89 0.80 2.52 2.02 0.15 1.19 2302500300055 7.42 7.42 2.64 0.92 5.21 0.66 2302500300056 0.06 2302500300057 ENDCOMMON 9 0 2302500300058 DATA 4 1 2302500300059 EN-MIN DATA ERR-T ERR-T 2302500300060 EV B B PER-CENT 2302500300061 0.55 59.6 8.5 14.3 2302500300062 ENDDATA 3 0 2302500300063 ENDSUBENT 62 0 2302500399999 ENDENTRY 3 0 2302599999999