ENTRY 31634 20120925 31573163400000001 SUBENT 31634001 20120925 31573163400100001 BIB 15 58 3163400100002 TITLE Measurement of neutron capture cross-section of the 3163400100003 71Ga(n,gamma)72Ga reaction at 0.0536 eV energy 3163400100004 AUTHOR (M.S.Uddin, M.H.Chowdhury, S.M.Hossain, Sk.A.Latif, 3163400100005 M.A.Hafiz,M.A.Islam,A.K.M.Zakaria,S.M.Yunus, 3163400100006 S.M.Azharul Islam) 3163400100007 INSTITUTE (3BANSAV) 3163400100008 (3BANBAN) Jahangirnagar University, Savar, Dhaka 3163400100009 REFERENCE (J,NIM/B,266,3341,2008) 3163400100010 FACILITY (REAC,3BANSAV) 3 MW TRIGA Mark-II research reactor 3163400100011 INC-SOURCE (REAC) The neutron fluxes 1.85x10**5 +/- 5500 and 3163400100012 1.60x10**5 +/- 4700 n/cm2/s were obtained 3163400100013 individually from two Au-foils at front and back of 3163400100014 gallium oxide pellet, respectively. 3163400100015 SAMPLE The powder sample of gallium oxide (Ga2O3; 99.99% 3163400100016 purity) used as gallium target of natural isotopic 3163400100017 composition: 69Ga(60.108%) and 71Ga (39.892%) were 3163400100018 sandwiched with two pure gold foils (25 mu-m thick 3163400100019 and 8 mm diameter) for irradiation. 3163400100020 The powder of Ga2O3 was in pressed with a pressure of 3163400100021 5 tons/cm2 using a hydraulic press to prepare pellet. 3163400100022 The pellet of 1.27 g has the diameter 1.2 cm and 3163400100023 thickness 0.13 cm. 3163400100024 DETECTOR (HPGE) The high-purity germanium (HPGe) gamma-ray 3163400100025 spectroscopy (Canberra, 15% relative efficiency, 3163400100026 1.8 keV resolution at 1332.5 keV of 60Co) coupled 3163400100027 with digital gamma spectrometry system and Maestro 3163400100028 data acquisition software were used to measure the 3163400100029 radioactivity of the residual nuclei in the activated 3163400100030 pellet and monitor foils without chemical separation. 3163400100031 METHOD (CHRFL) Incident neutrons have been monochromatized 3163400100032 by Bragg reflection from a Cu(200) monochromator 3163400100033 using a suitable single crystal. 3163400100034 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 3163400100035 The neutron beam intensity was determined from the 3163400100036 measured activities induced in gold monitor foils 3163400100037 using the 197Au(n,gamma)198Au monitor reaction. 3163400100038 The monitor foils were measured with the same detector 3163400100039 and in a comparable geometry as the gallium oxide 3163400100040 target. 3163400100041 DECAY-MON (79-AU-198,2.695D,DG,411.8,0.955) 3163400100042 MONIT-REF The cross-section of the monitor reaction was evaluated3163400100043 from the trend line of experimental data reported by 3163400100044 (22370001,S.Yamamoto+,J,NST,33,815,1996) 3163400100045 (40464001,E.A.Pavlenko+,C,75KIEV,3,171,197506) 3163400100046 (12196001,E.Haddad+,J,NIM,31,125,1964) 3163400100047 ERR-ANALYS (ERR-T) The total uncertainty includes: 3163400100048 (ERR-1) Neutron flux (3%) 3163400100049 (ERR-2) Efficiency calibration (3%) 3163400100050 (ERR-3) Sample mass (0.01%) 3163400100051 (ERR-4) Half-life (0.01%) 3163400100052 (ERR-5) Self-shielding factor (0.01%) 3163400100053 (ERR-6) Isotopic abundance (0.016%) 3163400100054 (ERR-S,1.,2.) gamma counting statistics (1-2%) 3163400100055 (ERR-7,0.5,0.7) Decay branching ratio (0.5-0.7%) 3163400100056 STATUS (TABLE) Table 3 of Nucl.Instrum.Meth.B266(2008)3341 3163400100057 (APRVD) Entry approved by Dr.M.S.Uddin (2008-02-01) 3163400100058 HISTORY (20080731C) SD 3163400100059 (20120925A) On. ERR-3 to ERR-6 added. METHOD added. 3163400100060 ENDBIB 58 0 3163400100061 COMMON 8 6 3163400100062 EN EN-ERR ERR-1 ERR-2 ERR-3 ERR-4 3163400100063 ERR-5 ERR-6 3163400100064 EV EV PER-CENT PER-CENT PER-CENT PER-CENT 3163400100065 PER-CENT PER-CENT 3163400100066 0.0536 0.00026 3. 3. 0.01 0.01 3163400100067 0.01 0.016 3163400100068 ENDCOMMON 6 0 3163400100069 ENDSUBENT 68 0 3163400199999 SUBENT 31634002 20120925 31573163400200001 BIB 3 4 3163400200002 REACTION (31-GA-71(N,G)31-GA-72,,SIG) 3163400200003 DECAY-DATA (31-GA-72,14.1HR,DG,834.03,0.9563, 3163400200004 DG,629.96,0.248) 3163400200005 HISTORY (20120925A) On. T(1/2) corrected (141 hr -> 14.1 hr) 3163400200006 ENDBIB 4 0 3163400200007 NOCOMMON 0 0 3163400200008 DATA 4 1 3163400200009 DATA ERR-T MONIT MONIT-ERR 3163400200010 B B B B 3163400200011 2.75 0.14 68.5 1.7 3163400200012 ENDDATA 3 0 3163400200013 ENDSUBENT 12 0 3163400299999 ENDENTRY 2 0 3163499999999