ENTRY 30425 20211108 32033042500000001 SUBENT 30425001 20211108 32033042500100001 BIB 13 55 3042500100002 TITLE Independent yields of fast-neutron fission of 232Th: 3042500100003 Observation of proton odd-even effect and neutron 3042500100004 shell effect on the yields 3042500100005 AUTHOR (T.Izak-Biran,S.Amiel) 3042500100006 INSTITUTE (3ISLSOR) 3042500100007 REFERENCE (J,PR/C,16,266,1977) 3042500100008 (J,JIN,40,757,1978) Same exp. Kr,Rb,Xe,Cs + 'FCY' 3042500100009 (J,JIN,40,937,1978) Same exp. Sn,Sb. 3042500100010 (P,INDC(SEC)-61,181,1977) Report, no data. 3042500100011 FACILITY (REAC,3ISLSOR) Israel research reactor IRR-1 3042500100012 INC-SOURCE (REAC) 3042500100013 INC-SPECT Fast neutron flux of 4.x 10**11 neutrons/cm2/sec. 3042500100014 Cadmium shield to thorium was used to minimize thermal 3042500100015 neutron capture. 3042500100016 SAMPLE 2 gram of Th-232 in the form of thorium nitrate. 3042500100017 METHOD (CHSEP) Separation of the fission-produced Kr and Xe 3042500100018 from the other elements by sweeping with a stream of 3042500100019 helium. 3042500100020 Fission-produced tin and antimony were chemically 3042500100021 separated as hydrides, using Na-B-H(4). 3042500100022 (GSPEC) The gamma ray spectra of these noble gases and 3042500100023 their daughters were measured and the corresponding 3042500100024 independent yields were calculated. 3042500100025 The gamma tin and antimony ray spectra were measured 3042500100026 and the corresponding independent yields were 3042500100027 calculated directly besides for Sn-131 which was 3042500100028 calculated by comparing the measurements from Th-232 3042500100029 to those from U-235. 3042500100030 ASSUMED (ASSUM,90-TH-232(N,F)MASS,CHN,FY) Cited chain yields. 3042500100031 All the data available for each mass chain were 3042500100032 averaged. The references are given in REL-REF. 3042500100033 REL-REF (R,,T.J.Kennett+,J,CJP,35,969,1957) 3042500100034 (R,30947001,R.H.Iyer+,J,JIN,25,465,1963) 3042500100035 (R,13095001,K.M.Broom,J,PR,133,B874,1964) 3042500100036 (R,,A.Wyttenbach+,J,RCA,3,118,1964) 3042500100037 (R,22791001,M.Bresesti+,J,JIN,29,1189,1967) 3042500100038 (R,,I.F.Croall,R,AERE-R-5086,1967) 3042500100039 (R,13234001,J.W.Harvey+,J,CJC,46,2911,1968) 3042500100040 (R,,S.J.Lyle+,J,RCA,9,90,1968) 3042500100041 (R,,D.L.Swindle+,J,JIN,33,3643,1971) 3042500100042 (R,,C.Chauvin,T,CHAUVIN,1973) 3042500100043 Ph.D.Thesis,University of Grenoble 3042500100044 (R,,M.Lammer+,C,73PARIS,1,505,1973) 3042500100045 STATUS (APRVD) Talma Izak-Biran with additional note in 3042500100046 METHOD, 1979/05/03. 3042500100047 HISTORY (19771130C) KO. 3042500100048 (19780921A) KO.-2nd,3rd refs.added. New data added in 3042500100049 subent. .002.- 3042500100050 (19790925U) KO. -APRVD and note to METHOD added.- 3042500100051 (20090310A) SD: Updated to new date formats,lower case.3042500100052 (20101216U) On. BIB updated 3042500100053 (20110812A) VS. TITLE corrected. 3042500100054 (20211015A) VS. Reference INDC(SEC),61,181,1977 added. 3042500100055 002 IFY kept and 003 added with CFY. 3042500100056 REACTION corrected. SF8 FIS->EPI 3042500100057 ENDBIB 55 0 3042500100058 COMMON 1 3 3042500100059 EN-MIN 3042500100060 EV 3042500100061 0.55 3042500100062 ENDCOMMON 3 0 3042500100063 ENDSUBENT 62 0 3042500199999 SUBENT 30425002 20211108 32033042500200001 BIB 6 28 3042500200002 REACTION (90-TH-232(N,F)ELEM/MASS,IND,FY,,FRC/EPI) 3042500200003 Fractional independent fission yield (FIY) 3042500200004 ANALYSIS The fractional independent yields were calculated by 3042500200005 dividing the measured independent yields by the 3042500200006 respective chain yields. 3042500200007 The independent yields were determined absolutely using3042500200008 the known absolute gamma-ray abundances. 3042500200009 FLAG (1.) Derived from the measured 'FIY' of the parent, 3042500200010 appeared in Table 1 of Phys.Rev.C16(1977)266. 3042500200011 (2.) Derived from the measured 'FIY' of the parent, but3042500200012 the daughter contributes a few percent and its yield, 3042500200013 estimated as the (1.0+-0.3) normal yield (D.R.Nathaway3042500200014 and A.W.Barton, UCRL-51458(1973) was subtracted. 3042500200015 (3.) Derived from the measured 'FIY' of the parent, but3042500200016 the daughter contributes a few percent and its yield, 3042500200017 estimated as the (1.0+-0.3) normal yield (K.Wolfsberg,3042500200018 private communication) was subtracted. 3042500200019 (4.) Derived from the measured 'FIY' of the parent, 3042500200020 appeared in Table 4 of J.Inorg.Nucl.Chem.40(1978)757. 3042500200021 STATUS (TABLE) Table 1 of Phys.Rev.C16(1977)266, and 3042500200022 Table 3 of J.Inorg.Nucl.Chem.40(1978)937 3042500200023 HISTORY (19780921A) KO.-Collection of results from 3 refs.- 3042500200024 (20101216A) On. ASSUM(-ERR): PER-CENT -> PC/FIS 3042500200025 (20211015A) VS. 002 split into 002 for IFY and 3042500200026 003 for CFY. REACTION ratio -> SF8=FRC and FIS-EPI 3042500200027 FLAF (5.) and (6.) and corresponding data deleted: 3042500200028 not experimental data. 3042500200029 ERR-ANALYS (DATA-ERR) Weighted mean value. 3042500200030 ENDBIB 28 0 3042500200031 NOCOMMON 0 0 3042500200032 DATA 8 18 3042500200033 MASS ELEMENT DATA DATA-ERR DATA-MAX FLAG 3042500200034 ASSUM ASSUM-ERR 3042500200035 NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM 3042500200036 PC/FIS PC/FIS 3042500200037 90. 36. 0.762 0.114 3042500200038 7.20 0.21 3042500200039 91. 36. 0.74 0.064 3042500200040 6.80 0.30 3042500200041 91. 37. 0.163 0.066 1. 3042500200042 6.80 0.30 3042500200043 91. 37. 0.160 0.046 4. 3042500200044 6.80 0.30 3042500200045 131. 50. 0.71 0.202 3042500200046 1.73 0.08 3042500200047 131. 51. 0.221 0.202 2. 3042500200048 1.73 0.08 3042500200049 131. 51. 0.230 0.208 3. 3042500200050 1.73 0.08 3042500200051 132. 50. 0.529 0.085 3042500200052 2.87 0.14 3042500200053 132. 50. 0.550 0.1340 2. 3042500200054 2.87 0.14 3042500200055 132. 50. 0.524 0.140 3. 3042500200056 2.87 0.14 3042500200057 132. 51. 0.330 0.132 3042500200058 2.87 0.14 3042500200059 132. 51. 0.345 0.096 2. 3042500200060 2.87 0.14 3042500200061 132. 51. 0.319 0.097 3. 3042500200062 2.87 0.14 3042500200063 133. 51. 0.465 3042500200064 3.80 0.30 3042500200065 139. 54. 0.755 0.078 3042500200066 6.99 0.27 3042500200067 140. 54. 0.773 0.0560 3042500200068 7.76 0.36 3042500200069 140. 55. 0.146 0.068 1. 3042500200070 7.76 3.6 3042500200071 140. 55. 0.146 0.040 4. 3042500200072 7.76 0.36 3042500200073 ENDDATA 40 0 3042500200074 ENDSUBENT 73 0 3042500299999 SUBENT 30425003 20211108 32033042500300001 BIB 4 6 3042500300002 REACTION (90-TH-232(N,F)ELEM/MASS,CUM,FY,,FRC/EPI) 3042500300003 Fractional cumulative fission yield (FCY) 3042500300004 STATUS (TABLE) Table 3,3B of J.Inorg.Nucl.Chem.40(1978)757 3042500300005 HISTORY (20211015C) VS. Extracted from 002. 3042500300006 Derived datum deleted. SF8: FIS->EPI. 3042500300007 ERR-ANALYS (DATA-ERR) Weighted mean value. 3042500300008 ENDBIB 6 0 3042500300009 NOCOMMON 0 0 3042500300010 DATA 6 4 3042500300011 MASS ELEMENT DATA DATA-ERR ASSUM ASSUM-ERR 3042500300012 NO-DIM NO-DIM NO-DIM NO-DIM PC/FIS PC/FIS 3042500300013 90. 36. 1.02 0.065 7.20 0.21 3042500300014 91. 36. 0.841 0.045 6.80 0.30 3042500300015 139. 54. 0.98 0.037 6.99 0.27 3042500300016 140. 54. 0.854 0.039 7.76 0.36 3042500300017 ENDDATA 6 0 3042500300018 ENDSUBENT 17 0 3042500399999 ENDENTRY 3 0 3042599999999