ENTRY 22874 20131222 22382287400000001 SUBENT 22874001 20131222 22382287400100001 BIB 15 52 2287400100002 TITLE Measurement of effective cross section of 2287400100003 Th-233(n,g)Th-234 reaction using the KUR 2287400100004 AUTHOR (H.Chatani) 2287400100005 INSTITUTE (2JPNKTO) 2287400100006 REFERENCE (C,2004SANTA,1,664,2004) 2287400100007 (S,JAERI-C-2004-005,161,2004) 2287400100008 preliminary data for Hyd, Slant(1) and Slant(2) given 2287400100009 REL-REF (I,,H.Chatani,S,JAERI-C-2003-006,241,2003) 2287400100010 Details of irradiation facilities 2287400100011 (R,,E.Browne+,B,BROWNE,,1986) 2287400100012 Decay data of 234Th 2287400100013 FACILITY (REAC,2JPNKTO) Irradiation was done at 2287400100014 - Hyd (hydraulic conveyer, at the centre of the core) 2287400100015 - Pn-2 (pneumatic tube No.2, in the reflectors) 2287400100016 - Slant (slant exposure tube, outside the reflectors) 2287400100017 INC-SPECT The thermal flux (n*v0) and the epithermal index 2287400100018 r*sqrt(T/T0) determined from 197Au(n,g)198Au and 2287400100019 59Co(n,g)60Co are 2287400100020 ----------------------------------------------- 2287400100021 n*v0 (n/s/cm2) r*sqrt(T/T0) 2287400100022 ----------------------------------------------- 2287400100023 Slant(1st) (1.07+/-0.03)E+13 0.0129+/-0.0009 2287400100024 Slant(2nd) (9.90+/-0.03)E+12 0.0118+/-0.0008 2287400100025 Slant(3rd) (1.20+/-0.04)E+13 0.0133+/-0.0009 2287400100026 Hyd (1.08+/-0.03)E+14 0.0322+/-0.0023 2287400100027 Pn-2 (1.97+/-0.06)E+13 0.0401+/-0.0028 2287400100028 ----------------------------------------------- 2287400100029 ASSUMED 59Co(n,g)60Co sigma0 = 37.18 b, RI= 74 b 2287400100030 197Au(n,g)198Au sigma0 = 98.65 b, RI= 1550 b 2287400100031 232Th(n,g)233Th sigma0 = 7.4 b, RI= 84.4 b 2287400100032 SAMPLE Approximately 100 or 200 mg of solid thorium (IV) 2287400100033 nitrate tetrahydrate Th(NO3)4*4H2O irradiated with 2287400100034 0.1143% Au-Al and 0.483% Co-Al alloy foils 2287400100035 DETECTOR (HPGE) low-background (LBG) and low-energy photon 2287400100036 spectrometer (LEPS) 2287400100037 METHOD (ACTIV) Irradiated at 5000 kW for 5 h (Hyd, Slant) or 2287400100038 1 h (Pn-2) 2287400100039 (CHSEP) Solvent extraction and ion-exchange were done 2287400100040 more than 13 days after the irradiation in order to 2287400100041 wait 233Th and 231Th produced by 232Th(n,g) and 2287400100042 (n,2n) to decay out. 2287400100043 ANALYSIS The effective cross section of 233Th(n,g)234Th was 2287400100044 determined from 2287400100045 - activity of 234Th, 2287400100046 - effective cross section of 232Th(n,g)233Th, 2287400100047 - the amount of 232Th recovered after chemical 2287400100048 purification. 2287400100049 DECAY-DATA (90-TH-234,,DG,92.35,0.0273, 2287400100050 DG,92.78,0.0269) Doublet at ~92.57 keV 2287400100051 ERR-ANALYS (DATA-ERR) No information on source of uncertainties 2287400100052 HISTORY (20050815C) SM 2287400100053 (20131222A) On. 002 and 006 deleted; 007 added 2287400100054 ENDBIB 52 0 2287400100055 NOCOMMON 0 0 2287400100056 ENDSUBENT 55 0 2287400199999 NOSUBENT 22874002 20131216 22382287400200001 SUBENT 22874003 20131216 22382287400300001 BIB 4 14 2287400300002 REACTION 1(90-TH-233(N,G)90-TH-234,,SIG,,SPA) Slant (1st) 2287400300003 2(90-TH-233(N,G)90-TH-234,,SIG,,SPA) Slant (2nd) 2287400300004 3(90-TH-233(N,G)90-TH-234,,SIG,,SPA) Slant (3rd) 2287400300005 4(90-TH-233(N,G)90-TH-234,,SIG,,SPA) Hyd 2287400300006 5(90-TH-233(N,G)90-TH-234,,SIG,,SPA) Pn-2 2287400300007 ANALYSIS Derived with the following 5 assumed 232Th(n,g)233Th 2287400300008 effective cross sections (barn): 2287400300009 Slant(1st) 8.58+/-0.08 2287400300010 Slant(2nd) 8.48+/-0.08 2287400300011 Slant(3rd) 8.61+/-0.09 2287400300012 Hyd 10.34+/-0.21 2287400300013 Pn-2 11.07+/-0.26 2287400300014 STATUS (TABLE) Table 1 of 2004SANTA,1,664 2287400300015 HISTORY (20131222A) On. REACTION(SF8): MXW -> SPA 2287400300016 ENDBIB 14 0 2287400300017 COMMON 1 3 2287400300018 EN-DUMMY 2287400300019 EV 2287400300020 0.0253 2287400300021 ENDCOMMON 3 0 2287400300022 DATA 10 1 2287400300023 DATA 1DATA-ERR 1DATA 2DATA-ERR 2DATA 3DATA-ERR 32287400300024 DATA 4DATA-ERR 4DATA 5DATA-ERR 5 2287400300025 B B B B B B 2287400300026 B B B B 2287400300027 1330. 80. 1270. 70. 1250. 70. 2287400300028 1340. 80. 1300. 80. 2287400300029 ENDDATA 6 0 2287400300030 ENDSUBENT 29 0 2287400399999 SUBENT 22874004 20131216 22382287400400001 BIB 3 4 2287400400002 REACTION (90-TH-233(N,G)90-TH-234,,SIG) 2287400400003 STATUS (TABLE) Text (p667) of AIP Conf.Proc.769(2005)664 2287400400004 (DEP,22874003) Effective cross sections given 2287400400005 HISTORY (20131222A) On. ANALYSIS: 232Th(n,g)233 data added. 2287400400006 ENDBIB 4 0 2287400400007 NOCOMMON 0 0 2287400400008 DATA 3 1 2287400400009 EN DATA DATA-ERR 2287400400010 EV B B 2287400400011 0.0253 1270. 50. 2287400400012 ENDDATA 3 0 2287400400013 ENDSUBENT 12 0 2287400499999 SUBENT 22874005 20131216 22382287400500001 BIB 2 4 2287400500002 REACTION (90-TH-233(N,G)90-TH-234,,RI) 2287400500003 STATUS (TABLE) Text (p667) of 2004SANTA,1,664 2287400500004 (DEP,22874004) Thermal cross section 2287400500005 (DEP,22874007) non 1/v-part of resonance integral 2287400500006 ENDBIB 4 0 2287400500007 NOCOMMON 0 0 2287400500008 DATA 3 1 2287400500009 EN-MIN DATA DATA-ERR 2287400500010 EV B B 2287400500011 0.5 1680. 930. 2287400500012 ENDDATA 3 0 2287400500013 ENDSUBENT 12 0 2287400599999 NOSUBENT 22874006 20131216 22382287400600001 SUBENT 22874007 20131216 22382287400700001 BIB 2 4 2287400700002 REACTION (90-TH-233(N,G)90-TH-234,,RI,,RNV) 2287400700003 STATUS (TABLE) Text (p667) of 2004SANTA,1,664 2287400700004 (DEP,22874003) Effective cross section 2287400700005 (DEP,22874004) Thermal cross section 2287400700006 ENDBIB 4 0 2287400700007 NOCOMMON 0 0 2287400700008 DATA 3 1 2287400700009 EN-MIN DATA DATA-ERR 2287400700010 EV B B 2287400700011 0.5 1100. 930. 2287400700012 ENDDATA 3 0 2287400700013 ENDSUBENT 12 0 2287400799999 ENDENTRY 7 0 2287499999999