ENTRY 30798 20180524 31853079800000001 SUBENT 30798001 20180524 31853079800100001 BIB 10 21 3079800100002 TITLE Cumulative yields of short-lived ruthenium isotopes in 3079800100003 thermal neutron-induced fission of 241Pu 3079800100004 AUTHOR (A.G.C.Nair, S.K.Das, B.S.Tomar, A.Goswami, 3079800100005 B.K.Srivastava, S.Prakash) 3079800100006 INSTITUTE (3INDTRM) 3079800100007 REFERENCE (J,RCA,42,7,1987) 3079800100008 FACILITY (REAC,3INDTRM) CIRUS pneumatic carrier facility 3079800100009 INC-SPECT Thermal neutron flux of about 10E+13 n/cm2/sec 3079800100010 SAMPLE ~1 ug of 241Pu in 1M HNO3 encapsuled in a 3079800100011 polypropylene tube 3079800100012 METHOD (ACTIV) Irradiated for 120 sec 3079800100013 (CHSEP) Ru was separated as RuO4 by fast radiochemical 3079800100014 technique using a distillation method. 3079800100015 The distillate was collected in a vial containing 5 ml 3079800100016 ice-cold 1M HCl. 3079800100017 The residual distillation liquid was collected and 3079800100018 assayed for monitors 97Zr and 104Tc. 3079800100019 (GSPEC) All samples were counted in fixed geometry. 3079800100020 DETECTOR (GE-IN) 45 cm3, resolution of 1.8 keV at 1332 keV 3079800100021 HISTORY (20010702C) ML 3079800100022 (20180524U) On. BIB updated. 3079800100023 ENDBIB 21 0 3079800100024 COMMON 1 3 3079800100025 EN-DUMMY 3079800100026 EV 3079800100027 0.0253 3079800100028 ENDCOMMON 3 0 3079800100029 ENDSUBENT 28 0 3079800199999 SUBENT 30798002 20180524 31853079800200001 BIB 9 28 3079800200002 REACTION (94-PU-241(N,F)ELEM/MASS,CUM,FY,,SPA) 3079800200003 MONITOR (94-PU-241(N,F)40-ZR-97,CUM,FY,,SPA) 3079800200004 (94-PU-241(N,F)43-TC-104,CUM,FY,,SPA) 3079800200005 MONIT-REF (,B.F.Rider,R,NEDO-12154-3(C),1981) 3079800200006 ANALYSIS Gamma-spectrum photopeak analysis; decay of samples was3079800200007 checked for correct half lives and radiochemical 3079800200008 purity. Standard equations were used for calculation 3079800200009 of activities from photopeak areas and for buildup and3079800200010 decay. 3079800200011 ERR-ANALYS The total error of an individual measurement including 3079800200012 detector efficiency, irradiation and separation times,3079800200013 chemical yield and fission rate is about 10%. 3079800200014 (ERR-S) 1 standard deviation for the average of 4 3079800200015 determinations. 3079800200016 DECAY-DATA ((1.)42-MO-107,2.9SEC) 3079800200017 ((1.)43-TC-107,21.SEC) 3079800200018 ((1.)44-RU-107,3.8MIN,DG,194.,0.143) 3079800200019 ((1.)45-RH-107,21.7MIN) 3079800200020 ((2.)42-MO-108,1.3SEC) 3079800200021 ((2.)43-TC-108,5.SEC) 3079800200022 ((2.)44-RU-108,4.5MIN,DG,165.,0.320) 3079800200023 ((2.)45-RH-108-G,16.8SEC) 3079800200024 ((3.)43-TC-109,1.4SEC) 3079800200025 ((3.)44-RU-109,34.5SEC,DG,206.,0.330) 3079800200026 ((3.)45-RH-109,80.SEC,DG,327.,0.641) 3079800200027 REL-REF (R,,U.Reus+,J,AND,29,1,1983) Decay data 3079800200028 STATUS (TABLE) Table 2 of Radiochim.Acta 42(1987)7 3079800200029 HISTORY (20180524U) On. MONIT-REF corrected 3079800200030 ENDBIB 28 0 3079800200031 NOCOMMON 0 0 3079800200032 DATA 5 3 3079800200033 ELEMENT MASS DATA ERR-S DECAY-FLAG 3079800200034 NO-DIM NO-DIM PC/FIS PC/FIS NO-DIM 3079800200035 44. 107. 4.88 0.41 1. 3079800200036 44. 108. 3.89 0.31 2. 3079800200037 44. 109. 2.73 0.01 3. 3079800200038 ENDDATA 5 0 3079800200039 ENDSUBENT 38 0 3079800299999 SUBENT 30798003 20020322 00003079800300001 BIB 7 31 3079800300002 REACTION (94-PU-241(N,F)MASS,CHN,FY,,SPA) 3079800300003 ANALYSIS Chain yields were derived from cumulative yields using 3079800300004 Wahl's charge distribution systematics (A.C.Wahl et al,3079800300005 2nd IAEA Symposium on Physics and Chemistry of Fission,3079800300006 Vienna, Austria, 28 July-1 August 1969, proceedings, 3079800300007 page 813). 3079800300008 Zp and the Gaussian width parameter SIGz of the 3079800300009 distribution were calculated according to: 3079800300010 Zp(A) = A/(1+(N/Z)p) 3079800300011 SIGz(A) = 0.04A/((1+N/Z)p)**2 3079800300012 where: (N/Z)p = (N/Z)f-0.05 3079800300013 derived in: A.Goswami et al, J.Phys.26(1986)179 3079800300014 ERR-ANALYS (ERR-S) The error given in the DATA table for the chain3079800300015 yield is the same as that of the cumulative yield which3079800300016 is given as 1 standard deviation of 4 determinations. 3079800300017 ASSUMED (ASSUM,94-PU-241(N,F)MASS,,ZP,,SPA) Zp value 3079800300018 MISC-COL (MISC) the Gaussian distribution width SIGz(A) 3079800300019 CRITIQUE by compiler: it is not appropriate to assign the 3079800300020 statistical errors derived for the cumulative yields 3079800300021 also to the chain yields, since they were derived from 3079800300022 charge dispersion systematics using rather crude 3079800300023 estimates for Zp and the width parameter SIGz. Instead,3079800300024 an overall error should have been estimated. Whereas 3079800300025 the difference is probably insignificant for A=107 (the3079800300026 Ru-107 cumulative yield is almost equal to the A=107 3079800300027 chain yield), it is certainly significant for A=108, 3079800300028 and particularly for A=109 where the difference is 3079800300029 fairly large, and the statistical error is unusually 3079800300030 small and unrealistic for the chain yield. 3079800300031 STATUS (TABLE) Data taken from Table 2 of main publication. 3079800300032 (DEP,30798002) derived from cumulative yields. 3079800300033 ENDBIB 31 0 3079800300034 NOCOMMON 0 0 3079800300035 DATA 5 3 3079800300036 MASS DATA ERR-S ASSUM MISC 3079800300037 NO-DIM PC/FIS PC/FIS NO-DIM NO-DIM 3079800300038 107. 4.94 0.41 42.91 0.68 3079800300039 108. 4.08 0.31 43.31 0.69 3079800300040 109. 3.14 0.01 43.71 0.70 3079800300041 ENDDATA 5 0 3079800300042 ENDSUBENT 41 0 3079800399999 ENDENTRY 3 0 3079899999999