ENTRY 23707 20200505 22882370700000001 SUBENT 23707001 20200505 22882370700100001 BIB 11 17 2370700100002 TITLE Identification of new arsenic isotopes in fission: 2370700100003 83As and 84As 2370700100004 AUTHOR (P.del Marmol) 2370700100005 REFERENCE (J,JIN,30,2873,1968) 2370700100006 INSTITUTE (2BLGMOL) 2370700100007 REL-REF (I,23708001,P.del Marmol+,J,JIN,29,273,1967) 2370700100008 Irradiation facility and As separation method 2370700100009 FACILITY (REAC,2BLGMOL) BR2 reactor 2370700100010 INC-SOURCE (REAC) 2370700100011 INC-SPECT Thermal neutrons. Flux ~1.E+9 n/(cm2*sec), 2370700100012 was normalized by U-235 fission chamber monitor. 2370700100013 SAMPLE Solution containing ~1 g of 90%-enriched U-235, 2370700100014 As-76 tracer, 0.5 mg As+5, 5 mg Sb+5, 1 mg SeO(3)-- 2370700100015 carriers in 30% H(2)SO(4). 2370700100016 METHOD (CHSEP) 2370700100017 Irradiation time - 20 sec for As-83, 10 sec for As-84. 2370700100018 HISTORY (20200520C) M.M. 2370700100019 ENDBIB 17 0 2370700100020 COMMON 1 3 2370700100021 EN-DUMMY 2370700100022 EV 2370700100023 0.0253 2370700100024 ENDCOMMON 3 0 2370700100025 ENDSUBENT 24 0 2370700199999 SUBENT 23707002 20200520 22882370700200001 BIB 5 13 2370700200002 REACTION (92-U-235(N,F)ELEM/MASS,CUM,FY,,FRC) 2370700200003 DECAY-DATA (33-AS-83,14.1SEC) 14.1+-1.1 sec 2370700200004 (34-SE-83-M,70.SEC) 2370700200005 (33-AS-84,5.8SEC) 5.8+-0.5 sec 2370700200006 ANALYSIS Cumulative fractional chain yield ( ratio of cumulative2370700200007 yield to total chain yield) was determined by 2370700200008 formulas (1) and (2) in J,JIN,30,2873,1968 . 2370700200009 For As-84 - the contribution ~5% from neutron-decay of2370700200010 As-85 was taken into account. 2370700200011 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 2370700200012 article. 2370700200013 STATUS (TABLE) Text page 2876 of 2370700200014 J.of Inorganic and Nuclear Chemistry,v.30,p.2873,1968 2370700200015 ENDBIB 13 0 2370700200016 COMMON 1 3 2370700200017 ELEMENT 2370700200018 NO-DIM 2370700200019 33. 2370700200020 ENDCOMMON 3 0 2370700200021 DATA 3 2 2370700200022 MASS DATA DATA-ERR 2370700200023 NO-DIM NO-DIM NO-DIM 2370700200024 83. 0.80 0.08 2370700200025 84. 0.17 0.02 2370700200026 ENDDATA 4 0 2370700200027 ENDSUBENT 26 0 2370700299999 SUBENT 23707003 20200520 22882370700300001 BIB 5 11 2370700300002 REACTION (92-U-235(N,F)MASS,SEC,ZP) 2370700300003 DECAY-DATA (33-AS-83,14.1SEC) 14.1+-1.1 sec 2370700300004 (34-SE-83-M,70.SEC) 2370700300005 (33-AS-84,5.8SEC) 5.8+-0.5 sec 2370700300006 ANALYSIS Calculated using Gaussian distribution for fractional 2370700300007 chain yields and empirical constant 0.86+-0.15 for 2370700300008 formula (4) 2370700300009 ERR-ANALYS (DATA-ERR) Includes uncertainty of fractional chain 2370700300010 yield and empirical constant. 2370700300011 STATUS (TABLE) Text page 2878 of 2370700300012 J.of Inorganic and Nuclear Chemistry,v.30,p.2873,1968 2370700300013 ENDBIB 11 0 2370700300014 NOCOMMON 0 0 2370700300015 DATA 3 2 2370700300016 MASS DATA DATA-ERR 2370700300017 NO-DIM NO-DIM NO-DIM 2370700300018 83. 32.96 0.24 2370700300019 84. 34.04 0.10 2370700300020 ENDDATA 4 0 2370700300021 ENDSUBENT 20 0 2370700399999 SUBENT 23707004 20200520 22882370700400001 BIB 6 15 2370700400002 REACTION (92-U-235(N,F)ELEM/MASS,IND,FY,,FRC) 2370700400003 DECAY-DATA (34-SE-83-M,70.SEC) 2370700400004 (34-SE-83-G,22.6MIN) 2370700400005 ANALYSIS Independent fractional yields were obtained from 2370700400006 contribution of chain through Se-83m 0.59+-0.04 2370700400007 ( obtained from two measurements, see REL-REFs) and 2370700400008 measured cumulative fission yield of As-83. 2370700400009 REL-REF (R,,J.R.Arnold+,J,JCP,15,703,1947) 0.78+-0.08 Se-83g/m 2370700400010 (R,,I.F.Croall+,J,JIN,25,1213,1963) 0.62+-0.05 Se-83g/m2370700400011 ERR-ANALYS (DATA-ERR) Large errors are due to the inherent errors 2370700400012 of the method, to the high cumulative yield of As-83, 2370700400013 to the closeness of the branching ratios of As-83 and 2370700400014 of the fission chain. 2370700400015 STATUS (TABLE) Text page 2880 of 2370700400016 J.of Inorganic and Nuclear Chemistry,v.30,p.2873,1968 2370700400017 ENDBIB 15 0 2370700400018 COMMON 2 3 2370700400019 ELEMENT MASS 2370700400020 NO-DIM NO-DIM 2370700400021 34. 83. 2370700400022 ENDCOMMON 3 0 2370700400023 DATA 4 2 2370700400024 ISOMER DATA +DATA-ERR -DATA-ERR 2370700400025 NO-DIM NO-DIM NO-DIM NO-DIM 2370700400026 0. 0.12 0.08 0.08 2370700400027 1. 0.08 0.09 0.08 2370700400028 ENDDATA 4 0 2370700400029 ENDSUBENT 28 0 2370700499999 ENDENTRY 4 0 2370799999999