ENTRY 30953 20211116 32033095300000001 SUBENT 30953001 20211116 32033095300100001 BIB 13 44 3095300100002 TITLE Independent yields of krypton and xenon isotopes in 3095300100003 thermal-neutron fission of 235U; observation of an 3095300100004 odd-even effect in the element yield distribution 3095300100005 AUTHOR (B.Ehrenberg,S.Amiel) 3095300100006 INSTITUTE (3ISLSOR) 3095300100007 REFERENCE (J,PR/C,6,618,1972) 3095300100008 (P,IA-1262,77,1972) graph 3095300100009 (P,IA-1218,96,1970) superseded 3095300100010 SAMPLE (92-U-235,ENR=0.93) 9 grams U3O8, enriched: 93% U-235 3095300100011 FACILITY (REAC,3ISLSOR) Swimming pool reactor, 3095300100012 (OLMS,3ISLSOR) on-line isotope separator SOLIS 3095300100013 see: S.Amiel, Arkiv Fysik 36 (1966) 71 3095300100014 INC-SOURCE (REAC) flux from external beam: 5.x 10**8 n/cm2/sec 3095300100015 METHOD (OLMS).Beams collected on alu-foil (0.03 mm thick). 3095300100016 foils cut into sections, each representing an 3095300100017 individual mass. 3095300100018 (BSPEC).Beta decays of each section counted (detector) 3095300100019 decay time to start of counting: about 2 min 3095300100020 DETECTOR (PROPC) Gas-flow proportional counter of Sugarman type 3095300100021 intercalibrated geometrically and energy-wise. 3095300100022 CORRECTION Backscattering factor due to alu-foils was found to be 3095300100023 constant for beta-rays of nuclides measured. 3095300100024 All Kr and Xe atoms were retained in the foil. 3095300100025 No diffusion of implanted atoms was detected. 3095300100026 Contamination: found at distance of 5 mass numbers and 3095300100027 more. Therefore only measured up to Kr-94 and Xe-143.3095300100028 for short lived isotopes, the decay during transfer 3095300100029 through the system was taken into account; this 3095300100030 concerns especially Kr-90,91, Xe-140; method: see 3095300100031 l.Winsberg, Nucl.Instr.Meth. 95 (1971) 19. 3095300100032 ANALYSIS (DECAY).From resolved beta-decay curves, half-lives of 3095300100033 longer lived isobars were obtained (see: decay data).3095300100034 These, together with literature values for half-lives3095300100035 of shorter lived isobars were used to determine the 3095300100036 yields of the noble-gas parents. 3095300100037 ERR-ANALYS (DATA-ERR) No information on sources of uncertainty. 3095300100038 HISTORY (19881017T) From Rider file to exfor90000 series 3095300100039 (19911106) ML converted to regular exfor, completed 3095300100040 (19920305U) ML: small corrections 3095300100041 (20090729A) SD:Updated to new date formats,lower case. 3095300100042 (20211014A) VS. Units corrected in 002-003. 3095300100043 STATUS deleted and code added to SAMPLE in 001. 3095300100044 New entry 006. 3095300100045 REFERENCE INDC(SEC)-61,183,1977 and 007 added. 3095300100046 ENDBIB 44 0 3095300100047 COMMON 1 3 3095300100048 EN-DUMMY 3095300100049 EV 3095300100050 0.0253 3095300100051 ENDCOMMON 3 0 3095300100052 ENDSUBENT 51 0 3095300199999 SUBENT 30953002 20211116 32033095300200001 BIB 7 29 3095300200002 REACTION ((92-U-235(N,F)ELEM/MASS,IND,FY,,MXW)/ 3095300200003 (92-U-235(N,F)36-KR-91,IND,FY,,MXW)) 3095300200004 METHOD Short irradiations of 2-25 sec for: Kr-87 to 91 3095300200005 long irradiations of 1-15 min for: Kr-91 to 94 3095300200006 DECAY-DATA ((1.)36-KR-87,76.31MIN) +- 0.62 min, own measurement 3095300200007 ((2.)36-KR-88,171.6MIN) +- 1.0 min, own measurement 3095300200008 ((3.)36-KR-89,2.97MIN) +- 0.07 min, own measurement 3095300200009 ((3.)37-RB-89,15.6MIN) +- 0.09 min, own measurement 3095300200010 ((4.)37-RB-90,3.15MIN) +- 0.03 min, own measurement 3095300200011 failed to observe 2 isomers (see comment) 3095300200012 36-KR-90 decay data not available 3095300200013 ((5.)37-RB-91,66.6SEC) +- 1.4 sec, own measurement 3095300200014 ((5.)38-SR-91,9.75HR) +- 0.07 hr, own measurement 3095300200015 ((7.)38-SR-93,8.22MIN) +- 0.14 min, own measurement 3095300200016 37-RB-93 decay data not available 3095300200017 ((7.)39-Y-93-G,9.56HR) +- 0.19 hr, own measurement 3095300200018 ((8.)36-KR-94,0.20SEC) +- 0.01 sec; from: Amiel et al 3095300200019 Phys.Rev. C 5 (1972) 270 3095300200020 ((8.)39-Y-94,19.4MIN) +- 0.5 min, own measurement 3095300200021 37-RB-94 and 38-SR-94 decay data not available 3095300200022 REL-REF (R,,G.C.Carlson+,J,NP/A,125,267,1969) 3095300200023 Decay data used in the present work 3095300200024 COMMENT Rb-90: although 2 isomers were known with half lives 3095300200025 of 2.6 and 4.2 min, the authors observed only one 3095300200026 component of 3.15 min, assumed that it corresponded 3095300200027 to the 2.6 min isomer and suggested a lower limit 3095300200028 of 15 for the isomeric ratio to the 4.2 min isomer. 3095300200029 STATUS (TABLE) Table III from PR/C,6,618,1972 3095300200030 HISTORY (20211014A) VS. ARB-UNITS -> NO-DIM. 3095300200031 ENDBIB 29 0 3095300200032 COMMON 1 3 3095300200033 ELEMENT 3095300200034 NO-DIM 3095300200035 36. 3095300200036 ENDCOMMON 3 0 3095300200037 DATA 4 8 3095300200038 MASS DATA DATA-ERR DECAY-FLAG 3095300200039 NO-DIM NO-DIM NO-DIM NO-DIM 3095300200040 87. 0.113 0.008 1. 3095300200041 88. 0.409 0.030 2. 3095300200042 89. 1.010 0.052 3. 3095300200043 90. 1.146 0.151 4. 3095300200044 91. 1. 5. 3095300200045 92. 0.457 0.020 3095300200046 93. 0.165 0.009 7. 3095300200047 94. 0.079 0.008 8. 3095300200048 ENDDATA 10 0 3095300200049 ENDSUBENT 48 0 3095300299999 SUBENT 30953003 20211116 32033095300300001 BIB 5 23 3095300300002 REACTION ((92-U-235(N,F)ELEM/MASS,IND,FY,,MXW)/ 3095300300003 (92-U-235(N,F)54-XE-139,IND,FY,,MXW)) 3095300300004 DECAY-DATA ((1.)54-XE-137,3.83MIN) +- 0.02 min, own measurement 3095300300005 ((2.)55-CS-138-G,33.41MIN) +- 0.18 min, own measurement3095300300006 54-XE-138 decay data not available 3095300300007 ((3.)55-CS-139,9.76MIN) +- 0.08 min, own measurement 3095300300008 54-XE-139 decay data not available 3095300300009 ((3.)56-BA-139,84.63MIN) +- 0.34 min, own measurement 3095300300010 ((4.)55-CS-140,67.90SEC) +- 0.83 sec, own measurement 3095300300011 ((5.)56-BA-141,18.03MIN) +- 0.19 min, own measurement 3095300300012 55-CS-141 decay data not available 3095300300013 ((5.)57-LA-141,4.03HR) +- 0.04 hr, own measurement 3095300300014 ((6.)56-BA-142,10.80MIN) +- 0.16 min, own measurement 3095300300015 55-CS-142 decay data not available 3095300300016 ((6.)57-LA-142,95.4MIN) +- 1.8 min, own measurement 3095300300017 ((7.)54-XE-143,0.30SEC) +- 0.03 sec; from: Amiel et al 3095300300018 Phys.Rev. C 5 (1972) 270 3095300300019 ((7.)57-LA-143,14.32MIN) +- 0.73 min, own measurement 3095300300020 55-CS-143 and 56-BA-143 decay data not available 3095300300021 REL-REF (R,,G.C.Carlson+,J,NP/A,125,267,1969) 3095300300022 Decay data used in the present work 3095300300023 STATUS (TABLE) Table IV from PR/C,6,618,1972 3095300300024 HISTORY (20211014A) VS. ARB-UNITS -> NO-DIM. 3095300300025 ENDBIB 23 0 3095300300026 COMMON 1 3 3095300300027 ELEMENT 3095300300028 NO-DIM 3095300300029 54. 3095300300030 ENDCOMMON 3 0 3095300300031 DATA 4 7 3095300300032 MASS DATA DATA-ERR DECAY-FLAG 3095300300033 NO-DIM NO-DIM NO-DIM NO-DIM 3095300300034 137. 0.577 0.038 1. 3095300300035 138. 0.974 0.060 2. 3095300300036 139. 1. 3. 3095300300037 140. 0.565 0.041 4. 3095300300038 141. 0.329 0.027 5. 3095300300039 142. 0.122 0.006 6. 3095300300040 143. 0.053 0.014 7. 3095300300041 ENDDATA 9 0 3095300300042 ENDSUBENT 41 0 3095300399999 SUBENT 30953004 20211116 32033095300400001 BIB 11 42 3095300400002 REACTION (92-U-235(N,F)ELEM/MASS,IND,FY,,MXW) 3095300400003 MONITOR (92-U-235(N,F)36-KR-91,IND,FY,,MXW) Calculated 3095300400004 from: fcy(Kr-91) * Y(a=91) - iy(Br-91), where 3095300400005 fcy(Kr-91) = Kr-91 fractional cumulative yield 3095300400006 Y(a=91) = mass 91 chain yield 3095300400007 iy(Br-91) = Br-91 independent yield (predicted) 3095300400008 values used: 3095300400009 FCY(Kr-91) = 0.59+-0.01 3095300400010 Y(a=91) = 5.91+-0.12 pc/fis 3095300400011 iy(Br-91) = 0.257 pc/fis (A.C.Wahl, priv. comm.) 3095300400012 MONIT-REF (,A.C.Wahl,J,JIN,6,263,1958) For: FCY(Kr-91) 3095300400013 (,S.Amiel,C,69VIENNA,,569,196907) for: Y(a=91) 3095300400014 METHOD Short irradiations of 2-25 sec for: Kr-87 to 91 3095300400015 long irradiations of 1-15 min for: Kr-91 to 94 3095300400016 DECAY-MON (36-KR-91) from: Nucl.Phys. A125 (1969) 267 3095300400017 (37-RB-91,66.6SEC) +- 1.4 sec, own measurement 3095300400018 (38-SR-91,9.75HR) +- 0.07 hr, own measurement 3095300400019 DECAY-DATA ((1.)36-KR-87,76.31MIN) +- 0.62 min, own measurement 3095300400020 ((2.)36-KR-88,171.6MIN) +- 1.0 min, own measurement 3095300400021 ((3.)36-KR-89,2.97MIN) +- 0.07 min, own measurement 3095300400022 ((3.)37-RB-89,15.6MIN) +- 0.09 min, own measurement 3095300400023 ((4.)37-RB-90,3.15MIN) +- 0.03 min, own measurement 3095300400024 failed to observe 2 isomers (see comment) 3095300400025 36-KR-90 decay daya not available 3095300400026 ((7.)38-SR-93,8.22MIN) +- 0.14 min, own measurement 3095300400027 37-RB-93 decay daya not available 3095300400028 ((7.)39-Y-93-G,9.56HR) +- 0.19 hr, own measurement 3095300400029 ((8.)36-KR-94,0.20SEC) +- 0.01 sec; from: Amiel et al 3095300400030 Phys.Rev.C 5 (1972) 270 3095300400031 ((8.)39-Y-94,19.4MIN) +- 0.5 min, own measurement 3095300400032 37-RB-94 and 38-SR-94 decay daya not available 3095300400033 REL-REF (R,,G.C.Carlson+,J,NP/A,125,267,1969) 3095300400034 Decay data used in the present work 3095300400035 COMMENT Rb-90: although 2 isomers were known with half lives 3095300400036 of 2.6 and 4.2 min, the authors observed only one 3095300400037 component of 3.15 min, assumed that it corresponded 3095300400038 to the 2.6 min isomer and suggested a lower limit 3095300400039 of 15 for the isomeric ratio. 3095300400040 ADD-RES (Z-DIS).For Kr isotopic distribution: 3095300400041 ap=89.96+-0.15, sigma-a=1.32+-0.18 3095300400042 STATUS (TABLE) Table III from PR/C,6,618,1972 3095300400043 HISTORY (20211014A) VS. Upper lower cases corrections. 3095300400044 ENDBIB 42 0 3095300400045 COMMON 3 3 3095300400046 ELEMENT MONIT MONIT-ERR 3095300400047 NO-DIM PC/FIS PC/FIS 3095300400048 36. 3.23 0.09 3095300400049 ENDCOMMON 3 0 3095300400050 DATA 4 7 3095300400051 MASS DATA DATA-ERR DECAY-FLAG 3095300400052 NO-DIM PC/FIS PC/FIS NO-DIM 3095300400053 87. 0.36 0.03 1. 3095300400054 88. 1.32 0.10 2. 3095300400055 89. 3.26 0.19 3. 3095300400056 90. 3.70 0.48 4. 3095300400057 92. 1.48 0.07 3095300400058 93. 0.53 0.03 7. 3095300400059 94. 0.26 0.02 8. 3095300400060 ENDDATA 9 0 3095300400061 ENDSUBENT 60 0 3095300499999 SUBENT 30953005 20211116 32033095300500001 BIB 9 27 3095300500002 REACTION (92-U-235(N,F)ELEM/MASS,IND,FY,,MXW) 3095300500003 MONITOR (92-U-235(N,F)54-XE-141,IND,FY,,MXW) 3095300500004 MONIT-REF (,K.Wolfsberg+,J,JIN,12,201,1960) 3095300500005 DECAY-MON (54-XE-141) from: Nucl.Phys. A125 (1969) 267 3095300500006 (56-BA-141,18.03MIN) +- 0.19 min, own measurement 3095300500007 55-CS-141 decay data not available 3095300500008 (57-LA-141,4.03HR) +- 0.04 hr, own measurement 3095300500009 DECAY-DATA ((1.)54-XE-137,3.83MIN) +- 0.02 min, own measurement 3095300500010 ((2.)55-CS-138-G,33.41MIN) +- 0.18 min, own measurement3095300500011 54-XE-138 decay data not available 3095300500012 ((3.)55-CS-139,9.76MIN) +- 0.08 min, own measurement 3095300500013 54-XE-139 decay data not available 3095300500014 ((3.)56-BA-139,84.63MIN) +- 0.34 min, own measurement 3095300500015 ((4.)55-CS-140,67.90SEC) +- 0.83 SEC, own measurement 3095300500016 ((6.)56-BA-142,10.80MIN) +- 0.16 min, own measurement 3095300500017 ((6.)57-LA-142,95.4MIN) +- 1.8 min, own measurement 3095300500018 55-CS-142 decay data not available 3095300500019 ((7.)54-XE-143,0.30SEC) +- 0.03 sec; from: Amiel et al 3095300500020 Phys.Rev.C 5 (1972) 270 3095300500021 ((7.)57-LA-143,14.32MIN) +- 0.73 min, own measurement 3095300500022 55-CS-143 and 56-BA-143 decay data not available 3095300500023 REL-REF (R,,G.C.Carlson+,J,NP/A,125,267,1969) 3095300500024 Decay data used in the present work 3095300500025 ADD-RES (Z-DIS).For Xe isotopic distribution: 3095300500026 ap=138.50+-0.15, sigma-a=1.51+-0.17 3095300500027 STATUS (TABLE) Table IV from PR/C,6,618,1972 3095300500028 HISTORY (20211014A) VS. Upper lower cases corrections. 3095300500029 ENDBIB 27 0 3095300500030 COMMON 4 3 3095300500031 ELEMENT MONIT +MONIT-ERR -MONIT-ERR 3095300500032 NO-DIM PC/FIS PC/FIS PC/FIS 3095300500033 54. 1.19 0.19 0.13 3095300500034 ENDCOMMON 3 0 3095300500035 DATA 5 6 3095300500036 MASS DATA +DATA-ERR -DATA-ERR DECAY-FLAG 3095300500037 NO-DIM PC/FIS PC/FIS PC/FIS NO-DIM 3095300500038 137. 2.97 0.40 0.32 1. 3095300500039 138. 5.03 0.62 0.50 2. 3095300500040 139. 5.16 0.50 0.40 3. 3095300500041 140. 2.92 0.43 0.31 4. 3095300500042 142. 0.63 0.10 0.07 6. 3095300500043 143. 0.27 0.08 0.07 7. 3095300500044 ENDDATA 8 0 3095300500045 ENDSUBENT 44 0 3095300599999 SUBENT 30953006 20211116 32033095300600001 BIB 3 5 3095300600002 REACTION (92-U-235(N,F)ELEM,CHG,FY,,MXW) 3095300600003 STATUS (TABLE) Table VI from PR/C,6,618,1972 3095300600004 (DEP,30953004) IFY of Kr isotopes 3095300600005 (DEP,30953005) IFY of Xe isotopes 3095300600006 HISTORY (20211014C) VS. 3095300600007 ENDBIB 5 0 3095300600008 NOCOMMON 0 0 3095300600009 DATA 5 2 3095300600010 ELEMENT DATA DATA-ERR +DATA-ERR -DATA-ERR 3095300600011 NO-DIM PC/FIS PC/FIS PC/FIS PC/FIS 3095300600012 36. 14.1 1.0 3095300600013 54. 20.0 2.3 1.8 3095300600014 ENDDATA 4 0 3095300600015 ENDSUBENT 14 0 3095300699999 SUBENT 30953007 20211116 32033095300700001 BIB 5 6 3095300700002 REACTION (92-U-235(N,F)ELEM/MASS,CUM,FY,,MXW) 3095300700003 REFERENCE (P,INDC(SEC)-61,183,1977) Same data for the IFY of 3095300700004 87,88,89Kr and 137,138,139Xe isotopes. 3095300700005 AUTHOR (H.Feldstein,S.Amiel) 3095300700006 STATUS (TABLE) Table 3 from INDC(SEC)-61,183,1977 3095300700007 HISTORY (20211014C) VS. 3095300700008 ENDBIB 6 0 3095300700009 NOCOMMON 0 0 3095300700010 DATA 6 6 3095300700011 ELEMENT MASS DATA DATA-ERR +DATA-ERR -DATA-ERR 3095300700012 NO-DIM NO-DIM PC/FIS PC/FIS PC/FIS PC/FIS 3095300700013 35. 87. 1.96 0.01 0.06 3095300700014 35. 88. 2.405 0.16 0.23 3095300700015 35. 89. 1.17 0.5 3095300700016 53. 137. 4.66 0.10 0.245 3095300700017 53. 138. 1.06 0.16 0.28 3095300700018 53. 139. 0.44 0.08 0.08 3095300700019 ENDDATA 8 0 3095300700020 ENDSUBENT 19 0 3095300799999 ENDENTRY 7 0 3095399999999