ENTRY 22861 20180125 22652286100000001 SUBENT 22861001 20180125 22652286100100001 BIB 12 46 2286100100002 TITLE Measurement of thermal neutron cross-sections and 2286100100003 resonance integrals for Ga-71(n,gamma)Ga-72 and 2286100100004 As-75(n,gamma)As-76 by using Am-241-Be isotopic 2286100100005 neutron source 2286100100006 AUTHOR (M.Karadag,H.Yucel,M.Tan,A.Ozmen) 2286100100007 INSTITUTE (2TUKANR) 2286100100008 (2TUKTUK) Cazi University, Turkey. 2286100100009 REFERENCE (J,NIM/A,501,524,2003) 2286100100010 SAMPLE The irradiations of the samples were carried out within2286100100011 and without a cylindrical cadmium shield case. The 2286100100012 irradiations for eight samples for each element, which 2286100100013 are individually prepared from the fresh stocks, were 2286100100014 repeated four time, that is, a set of four, with and 2286100100015 without Cd-irradiation data for MnO(2), Ga(2)O(3), 2286100100016 As(2)O(3) are obtained. The samples were diluted to 2286100100017 minimize self-shielding during irradiation. For this, 2286100100018 the samples were mechanically mixed with finely grained2286100100019 Al(2)O(3) powder by 98.6-96%, since Al-27 isotope has 2286100100020 low neutron absorption cross section. 2286100100021 The irradiation times for the (n,gamma) reactions of 2286100100022 Mn-55, Ga-71, As-75 were chosen for a period of 2286100100023 3-6 half-lives, yielding enough activity to be measured2286100100024 in gamma-ray counting system. 2286100100025 ADD-RES (COMP) The results are discussed and compared with 2286100100026 previous measurements and the evaluated data in 2286100100027 ENDF/B-VI and JENDL-3.2. 2286100100028 Using the nuclear data and the measured cadmium ratios 2286100100029 for W- and Au-, alpha-epithermal neutron spectrum shape2286100100030 factor has been found to be 0.116+-0.006 for the sample2286100100031 irradiation position. 2286100100032 DETECTOR A reverse-electrode germanium detector with a total 2286100100033 active volume of 100-cm*3. 2286100100034 INC-SPECT *EN-RSL* the energy resolution N-type Ge-detector with 2286100100035 be-window was 1.80-keV for 1332.5-keV of Co-60 and 2286100100036 0.97-keV for 122-keV of Co-57 and its relative 2286100100037 efficiency was 22.6%. 2286100100038 INC-SOURCE (AM-BE) The three 592-GBq Am-241-Be isotopic neutron 2286100100039 sources immersed in paraffin moderator shielded with 2286100100040 lead. 2286100100041 METHOD (ACTIV) 2286100100042 STATUS (TABLE) Tables 6,7 of NIM/A,501,524 2286100100043 HISTORY (20041127C) 2286100100044 (20041222U) Last checking has been done. 2286100100045 (20170824A) SD: FACILITY deleted. INC-SOURCE update. 2286100100046 ERR-ANALYS re-compiled. BIB update in all Subents. 2286100100047 (20180125A) On. Major revision in 004. 2286100100048 ENDBIB 46 0 2286100100049 NOCOMMON 0 0 2286100100050 ENDSUBENT 49 0 2286100199999 SUBENT 22861002 20170824 22652286100200001 BIB 7 27 2286100200002 REACTION (31-GA-71(N,G)31-GA-72,,SIG) 2286100200003 MONITOR (25-MN-55(N,G)25-MN-56,,SIG) 2286100200004 DECAY-DATA (31-GA-72,14.10HR,DG,834.03,0.9563,DG,629.96,0.248) 2286100200005 REL-REF (A,,G.Gleason,J,RRL,23,317,1975) 2286100200006 (A,,T.B.Ryves,J,NE,25,129,1971) 2286100200007 (D,,L.Koester+,J,ZP/A,318,347,1984) 2286100200008 (D,,W.S.Lyon,J,NSE,8,378,1960) 2286100200009 CORRECTION The thermal neutron self-shielding factor is 0.998. 2286100200010 ERR-ANALYS (ERR-T) Total uncertainty includes: 2286100200011 (ERR-S) Statistical error (statistics of +-1.65sigma). 2286100200012 (ERR-1) Error in detector efficiency 2286100200013 (ERR-2) Error in mass sample 2286100200014 (ERR-3) Error in half-life 2286100200015 (ERR-4) Error in branching ratio 2286100200016 (ERR-5) Error in self-shielding factor 2286100200017 (ERR-6) Error in isotopic abundance 2286100200018 (ERR-7) total uncertainty of Mn production includes: 2286100200019 * statistical error - 0.39% 2286100200020 * Error in detector efficiency is 2.75%. 2286100200021 * Error in mass sample is 0.01%. 2286100200022 * Error in half-life is 0.004%. 2286100200023 * Error in branching ratio is 0.30%. 2286100200024 * Error in self-shielding factor is 0.01%. 2286100200025 * Error in monitor thermal neutr. cross-sect. is 0.75%2286100200026 HISTORY (20170824A) SD: ERR-ANALYS re-compiled. BIB update. 2286100200027 MONIT deleted. SF8=MXW deleted. (sigma0 is corrected 2286100200028 for the Westcott factor). COMMENT -> CORRECTION. 2286100200029 ENDBIB 27 0 2286100200030 COMMON 6 3 2286100200031 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 2286100200032 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2286100200033 2.71 0.01 0.14 0.07 0.01 0.016 2286100200034 ENDCOMMON 3 0 2286100200035 DATA 5 1 2286100200036 EN-MEAN DATA ERR-T ERR-S ERR-7 2286100200037 EV B B PER-CENT PER-CENT 2286100200038 0.0253 4.41 0.18 0.42 0.1 2286100200039 ENDDATA 3 0 2286100200040 ENDSUBENT 39 0 2286100299999 SUBENT 22861003 20180125 22652286100300001 BIB 8 23 2286100300002 REACTION (31-GA-71(N,G)31-GA-72,,RI) 2286100300003 DECAY-DATA (31-GA-72,14.10HR,DG,834.03,0.9563,DG,629.96,0.248) 2286100300004 MONITOR (25-MN-55(N,G)25-MN-56,,RI) 2286100300005 DECAY-MON (25-MN-56,2.5789HR,DG,846.75,0.989) 2286100300006 REL-REF (A,,A.Simonits+,J,JRN,81,397,1984) 2286100300007 (D,,R.Van Der Linden+,J,JRC,11,133,1972) Less on 58% 2286100300008 THAN present measurement. 2286100300009 (D,,S.P.Harris+,J,PR,79,11,1950) 2286100300010 CORRECTION The epithermal self-shielding factors is 0.907. 2286100300011 ERR-ANALYS (ERR-T) Total uncertainty includes: 2286100300012 (ERR-1) error in cadmium ratio is 1.67% 2286100300013 (ERR-2) Error in self-shielding factor 0.15% 2286100300014 (ERR-3) Error in reference thermal neutron cross-sect. 2286100300015 (ERR-4) Error in alpha-shape parameter is 3.02%. 2286100300016 (ERR-5) Error in normalization: 2286100300017 * Error in cadmium ratio is 1.60%. 2286100300018 * Error in self-shielding factor 0.20%. 2286100300019 * Error in reference thermal neutron cross-sect. 0.75%2286100300020 * Error in alpha-shape parameter is 3.61%. 2286100300021 * Monitor resonance integral cross-section 2.14% 2286100300022 HISTORY (20170824A) SD: ERR-ANALYS re-compiled. BIB update. 2286100300023 MONIT deleted. 2286100300024 (20180125U) On. COMMENT->CORRECTION. 2286100300025 ENDBIB 23 0 2286100300026 COMMON 4 3 2286100300027 ERR-1 ERR-2 ERR-3 ERR-4 2286100300028 PER-CENT PER-CENT PER-CENT PER-CENT 2286100300029 1.67 0.15 4.12 3.02 2286100300030 ENDCOMMON 3 0 2286100300031 DATA 4 1 2286100300032 EN-MIN DATA ERR-T ERR-5 2286100300033 EV B B B 2286100300034 0.55 32.3 2.3 0.3 2286100300035 ENDDATA 3 0 2286100300036 ENDSUBENT 35 0 2286100399999 SUBENT 22861004 20180125 22652286100400001 BIB 8 27 2286100400002 REACTION (33-AS-75(N,G)33-AS-76,,SIG) 2286100400003 DECAY-DATA (33-AS-76,25.87HR,DG,559.10,0.45) 2286100400004 REL-REF (D,,W.S.Lyon,J,NSE,8,378,1960) About 61% than the 2286100400005 present measurement. 2286100400006 MONITOR (25-MN-55(N,G)25-MN-56,,SIG) 2286100400007 DECAY-MON (25-MN-56,2.5789HR,DG,846.75,0.989) 2286100400008 CORRECTION The thermal neutron self-shielding factors is 0.997. 2286100400009 ERR-ANALYS (ERR-T) Total uncertainty includes: 2286100400010 (ERR-S) Statistical error (statistics of +-1.65sigma). 2286100400011 (ERR-1) Error in detector efficiency 2286100400012 (ERR-2) Error in mass sample 2286100400013 (ERR-3) Error in half-life 2286100400014 (ERR-4) Error in branching ratio 2286100400015 (ERR-5) Error in self-shielding factor 2286100400016 (ERR-6) Error in isotopic abundance 2286100400017 (ERR-7) Normalization error: 2286100400018 * statistical error - 0.39% 2286100400019 * Error in detector efficiency is 2.75%. 2286100400020 * Error in mass sample is 0.01%. 2286100400021 * Error in half-life is 0.004%. 2286100400022 * Error in branching ratio is 0.30%. 2286100400023 * Error in self-shielding factor is 0.01%. 2286100400024 * Error in monitor thermal neutr. cross-sect. is 0.75%2286100400025 HISTORY (20170824A) SD: ERR-ANALYS re-compiled. BIB update. 2286100400026 MONIT deleted. SF8=MXW deleted. (sigma0 is corrected 2286100400027 for the Westcott factor). 2286100400028 (20180125A) On. MONIT-ERR->ERR-7. COMMENT->CORRECTION. 2286100400029 ENDBIB 27 0 2286100400030 COMMON 6 3 2286100400031 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 2286100400032 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2286100400033 2.23 0.01 0.19 4.44 0.01 0.016 2286100400034 ENDCOMMON 3 0 2286100400035 DATA 5 1 2286100400036 EN-MEAN DATA ERR-T ERR-S ERR-7 2286100400037 EV B B PER-CENT B 2286100400038 0.0253 4.15 0.24 0.26 0.1 2286100400039 ENDDATA 3 0 2286100400040 ENDSUBENT 39 0 2286100499999 SUBENT 22861005 20180125 22652286100500001 BIB 8 22 2286100500002 REACTION (33-AS-75(N,G)33-AS-76,,RI) 2286100500003 DECAY-DATA (33-AS-76,25.87HR,DG,559.10,0.45) 2286100500004 REL-REF (A,,S.I.Kafala,J,JRN,215,193,1997) 2286100500005 (D,,R.Van Der Linden+,J,JRC,11,133,1972) Less on 35% 2286100500006 than the present measurement. 2286100500007 MONITOR (25-MN-55(N,G)25-MN-56,,RI) 2286100500008 DECAY-MON (25-MN-56,2.5789HR,DG,846.75,0.989) 2286100500009 CORRECTION The epithermal self-shielding factor is 0.900. 2286100500010 ERR-ANALYS (ERR-T) Total uncertainty in As-75 includes: 2286100500011 (ERR-1) error in cadmium ratio is 1.70% 2286100500012 (ERR-2) Error in self-shielding factor 0.50% 2286100500013 (ERR-3) Error in reference thermal neutron cross-sect. 2286100500014 (ERR-4) Error in alpha-shape parameter is 2.77%. 2286100500015 (ERR-5) Normalization error: 2286100500016 * Error in cadmium ratio is 1.60%. 2286100500017 * Error in self-shielding factor 0.20%. 2286100500018 * Error in reference thermal neutron cross-sect. 0.75%2286100500019 * Error in alpha-shape parameter is 3.61%. 2286100500020 * Monitor resonance integral cross-section 2.14% 2286100500021 HISTORY (20170824A) SD: ERR-ANALYS re-compiled. BIB update. 2286100500022 MONIT deleted. COMMENT -> CORRECTION. 2286100500023 (20180125U) On. PART-DET deleted. 2286100500024 ENDBIB 22 0 2286100500025 COMMON 4 3 2286100500026 ERR-1 ERR-2 ERR-3 ERR-4 2286100500027 PER-CENT PER-CENT PER-CENT PER-CENT 2286100500028 1.70 0.50 2.22 2.77 2286100500029 ENDCOMMON 3 0 2286100500030 DATA 4 1 2286100500031 EN-MIN DATA ERR-T ERR-5 2286100500032 EV B B B 2286100500033 0.55 63.5 3.8 0.3 2286100500034 ENDDATA 3 0 2286100500035 ENDSUBENT 34 0 2286100599999 ENDENTRY 5 0 2286199999999