ENTRY 23311 20230219 2331100000001 SUBENT 23311001 20230219 20231011 2331100100001 BIB 12 45 2331100100002 TITLE Harwell pile oscillator measurements on the relative 2331100100003 neutron yields of uranium 233, uranium 235 and 2331100100004 plutonium 239 2331100100005 AUTHOR (M.J.Cabell, H.Rose, R.B.Tattersall) 2331100100006 INSTITUTE (2UK HAR) 2331100100007 REFERENCE ((R,AERE-R-4946,1965)=(R,TNCC(UK)-77,1960)) 2331100100008 (C,58GENEVA,16,34,1958) Preliminary values tabulated 2331100100009 (R,AERE-R/R-2457,1958) Preliminary values tabulated 2331100100010 FACILITY (OSCIP,2UK HAR) installed in reactors Dimple and Gleep 2331100100011 INC-SPECT Dimple: T=20 deg-C and virtually a pure Maxwellian 2331100100012 (epithermal index r<0.001) 2331100100013 Gleep: T=66+/-5 deg-C and epithermal index 2331100100014 r=0.042+/-0.002 (the latter being measured by Cd 2331100100015 ratio of thin Au foils). 2331100100016 SAMPLE Solution in D2O in polythene bottles (~2.5 cm diam, 2331100100017 30 cm long, ~150 ml). 2331100100018 Impurity contributions were calculated from the 2331100100019 chemical and mass analyses of the solutions. 2331100100020 ANALYSIS =[1-sig(eff,x)/sig(abs,x)]/ 2331100100021 [1-sig(eff,y)/sig(abs,y)], 2331100100022 where x and y are 233U, 235U or 239Pu, and the 2331100100023 absorption cross sections are taken from BNL-325. 2331100100024 <...> means ratio in the reactor., which is converted 2331100100025 to the 2200 m/s ratio: 2331100100026 eta(x)/eta(y)=* 2331100100027 [(g(abs,x)+r*s(abs,x))/(g(fis,x)+r*s(fis,x))]/2331100100028 [(g(abs,y)+r*s(abs,y))/(g(fis,y)+r*s(fis,y))],2331100100029 where g and r are the Westcott's g-factor and 2331100100030 epithermal index, respectively. 2331100100031 ASSUMED (ASSUM1,92-U-233(N,ABS),,SIG) 233U(nth,abs) = 578+/-4 b2331100100032 (ASSUM2,92-U-235(N,ABS),,SIG) 233U(nth,abs) = 683+/-3 b2331100100033 (ASSUM3,94-PU-239(N,ABS),,SIG)239Pu(nth,abs)=1028+/-8 b2331100100034 REL-REF (R,,D.J.Hughes+,R,BNL-325,1960) 2nd ed. Supplement No.12331100100035 2200 m/s absorption cross sections given 2331100100036 (R,,C.H.Westcott,R,CRRP-787,1958) 2331100100037 g-factors given 2331100100038 ERR-ANALYS (DATA-ERR) Standard deviation considering due to 2331100100039 - Pile oscillator measurements (~1%) 2331100100040 - Chemical determination of fissile material mass 2331100100041 - Boron cross section (0.5%) 2331100100042 - Absorption cross sections 2331100100043 See Eq.(I.2.5) for the error propagation to the eta 2331100100044 ratio. 2331100100045 HISTORY (20160921C) On 2331100100046 (20230219U) SD: Ref. AERE-R/R-2457 added. 2331100100047 ENDBIB 45 0 2331100100048 COMMON 6 3 2331100100049 ASSUM1 ASSUM1-ERR ASSUM2 ASSUM2-ERR ASSUM3 ASSUM3-ERR 2331100100050 B B B B B B 2331100100051 578. 4. 683. 3. 1028. 8. 2331100100052 ENDCOMMON 3 0 2331100100053 ENDSUBENT 52 0 2331100199999 SUBENT 23311002 20160921 22562331100200001 BIB 2 4 2331100200002 REACTION ((92-U-233(N,ABS),,ETA,,MXW)/ 2331100200003 (92-U-235(N,ABS),,ETA,,MXW)) 2331100200004 STATUS (TABLE) Table X (Dimple) of AERE-R-4946 (1965) 2331100200005 (COREL,23311003) Result from Gleep reactor 2331100200006 ENDBIB 4 0 2331100200007 NOCOMMON 0 0 2331100200008 DATA 3 1 2331100200009 KT-K DATA DATA-ERR 2331100200010 DEG-C NO-DIM NO-DIM 2331100200011 20. 1.102 0.020 2331100200012 ENDDATA 3 0 2331100200013 ENDSUBENT 12 0 2331100299999 SUBENT 23311003 20160921 22562331100300001 BIB 2 4 2331100300002 REACTION ((92-U-233(N,ABS),,ETA,,SPA)/ 2331100300003 (92-U-235(N,ABS),,ETA,,SPA)) 2331100300004 STATUS (TABLE) Table X (Gleep) of AERE-R-4946 (1965) 2331100300005 (COREL,23311002) Result from Dimple reactor 2331100300006 ENDBIB 4 0 2331100300007 NOCOMMON 0 0 2331100300008 DATA 3 1 2331100300009 KT-K DATA DATA-ERR 2331100300010 DEG-C NO-DIM NO-DIM 2331100300011 66. 1.106 0.018 2331100300012 ENDDATA 3 0 2331100300013 ENDSUBENT 12 0 2331100399999 SUBENT 23311004 20160921 22562331100400001 BIB 2 4 2331100400002 REACTION ((94-PU-239(N,ABS),,ETA,,MXW)/ 2331100400003 (92-U-235(N,ABS),,ETA,,MXW)) 2331100400004 STATUS (TABLE) Table X (Dimple) of AERE-R-4946 (1965) 2331100400005 (COREL,23311005) Result from Gleep reactor 2331100400006 ENDBIB 4 0 2331100400007 NOCOMMON 0 0 2331100400008 DATA 3 1 2331100400009 KT-K DATA DATA-ERR 2331100400010 DEG-C NO-DIM NO-DIM 2331100400011 20. 0.977 0.016 2331100400012 ENDDATA 3 0 2331100400013 ENDSUBENT 12 0 2331100499999 SUBENT 23311005 20160921 22562331100500001 BIB 2 4 2331100500002 REACTION ((94-PU-239(N,ABS),,ETA,,SPA)/ 2331100500003 (92-U-235(N,ABS),,ETA,,SPA)) 2331100500004 STATUS (TABLE) Table X (Gleep) of AERE-R-4946 (1965) 2331100500005 (COREL,23311004) Result from Dimple reactor 2331100500006 ENDBIB 4 0 2331100500007 NOCOMMON 0 0 2331100500008 DATA 3 1 2331100500009 KT-K DATA DATA-ERR 2331100500010 DEG-C NO-DIM NO-DIM 2331100500011 66. 0.963 0.013 2331100500012 ENDDATA 3 0 2331100500013 ENDSUBENT 12 0 2331100599999 SUBENT 23311006 20160921 22562331100600001 BIB 4 12 2331100600002 REACTION ((92-U-233(N,ABS),,ETA)/ 2331100600003 (92-U-235(N,ABS),,ETA)) 2331100600004 ANALYSIS Average of two 2200 m/s values: 2331100600005 1.099+/-0.020 (Dimple) 2331100600006 1.105+/-0.018 (Gleep) 2331100600007 converted from their reactor values. 2331100600008 ERR-ANALYS No allowance has been made for errors in the 2331100600009 conversion factor from reactor values to the 2331100600010 2200 m/s values. 2331100600011 STATUS (TABLE) Table XI of AERE-R-4946 (1965) 2331100600012 (DEP,23311002) Reactor value from Dimple 2331100600013 (DEP,23311003) Reactor value from Gleep 2331100600014 ENDBIB 12 0 2331100600015 NOCOMMON 0 0 2331100600016 DATA 3 1 2331100600017 EN DATA DATA-ERR 2331100600018 EV NO-DIM NO-DIM 2331100600019 0.0253 1.102 0.014 2331100600020 ENDDATA 3 0 2331100600021 ENDSUBENT 20 0 2331100699999 SUBENT 23311007 20160921 22562331100700001 BIB 4 12 2331100700002 REACTION ((94-PU-239(N,ABS),,ETA)/ 2331100700003 (92-U-235(N,ABS),,ETA)) 2331100700004 ANALYSIS Average of two 2200 m/s values: 2331100700005 0.999+/-0.016 (Dimple) 2331100700006 1.013+/-0.014 (Gleep) 2331100700007 converted from their reactor values. 2331100700008 ERR-ANALYS No allowance has been made for errors in the 2331100700009 conversion factor from reactor values to the 2331100700010 2200 m/s values. 2331100700011 STATUS (TABLE) Table XI of AERE-R-4946 (1965) 2331100700012 (DEP,23311004) Reactor value from Dimple 2331100700013 (DEP,23311005) Reactor value from Gleep 2331100700014 ENDBIB 12 0 2331100700015 NOCOMMON 0 0 2331100700016 DATA 3 1 2331100700017 EN DATA DATA-ERR 2331100700018 EV NO-DIM NO-DIM 2331100700019 0.0253 1.006 0.011 2331100700020 ENDDATA 3 0 2331100700021 ENDSUBENT 20 0 2331100799999 ENDENTRY 7 0 2331199999999