ENTRY 21731 20200520 22882173100000001 SUBENT 21731001 20200520 22882173100100001 BIB 13 44 2173100100002 INSTITUTE (2UK KEN) University Chemical Laboratory. 2173100100003 REFERENCE (J,RCA,11,108,1969) 2173100100004 (J,RCA,16,103,1971) Data were revised 2173100100005 AUTHOR (O.Birgul,S.J.Lyle) 2173100100006 TITLE Radiochemical studies of 3 and 14 MeV neutron 2173100100007 induced fission of Pa-231 2173100100008 REL-REF (O,23706001,O.Birgul+,J,RCA,16,103,1971) 2173100100009 Data for U-235 thermal neutron fission. 2173100100010 (O,22062001,O.Birgul+,J,RCA,16,103,1971) 2173100100011 Data for U-238 at 3.MeV. 2173100100012 FACILITY (CCW,2UK KEN) T type electrostatic rotary neutron 2173100100013 generator. 2173100100014 INC-SOURCE (D-D) For 3 MeV neutrons. 2173100100015 (D-T) For 14.8 MeV neutrons. 2173100100016 An electrostatically accelerated deuterium beam 2173100100017 on a solid titanium tritide or deuteride target. 2173100100018 SAMPLE .Thin sample of Pa-231, details given in RCA,6,16,66. 2173100100019 METHOD (ACTIV) Measurement of activity of selected fission 2173100100020 products. 2173100100021 .The fission fragments were collected on an aluminum 2173100100022 foil, 7 mg/cm2 thick, following recoil from the 2173100100023 fissionable target sample. 2173100100024 (CHSEP) Well-established radiochemical methods of 2173100100025 separation were used to isolate the elements of 2173100100026 interest after dissolution of the catcher foil 2173100100027 in hydrochloric acid. Recovery yields were determined 2173100100028 by weighing or by titrometry (Pr) or by 2173100100029 spectrophotometry (Ru). 2173100100030 DETECTOR (PROPC) End-window gas flow proportional counter 2173100100031 of the Sugarman type. To reduce background the 2173100100032 counter was shielded with Geiger-Muller counters 2173100100033 operated in anti-coincidence. 2173100100034 CORRECTION .Corrections for independent yields of nuclides 2173100100035 succeeding that isolated were made on the basis 2173100100036 of the equal charge displacement hypothesis. 2173100100037 ERR-ANALYS (ERR-S) Standard deviations from counting statistics 2173100100038 HISTORY (19810127C) 2173100100039 (19810213E) 2173100100040 (20200520A) Ref. RCA,16,103,1971 was added. 2173100100041 Subents .004-.005 were added. 2173100100042 Upper -> lower case correction. 2173100100043 Dates were corrected for 4-digits year. 2173100100044 BIB information was updated. 2173100100045 DATA-ERR -> ERR-S. 2173100100046 ENDBIB 44 0 2173100100047 NOCOMMON 0 0 2173100100048 ENDSUBENT 47 0 2173100199999 SUBENT 21731002 20200520 22882173100200001 BIB 4 5 2173100200002 REACTION (91-PA-231(N,F)MASS,CHN,FY) 2173100200003 ANALYSIS .Absolute values are taken as the mean of several 2173100200004 measurements normalized to mass 99 as 2.57 % . 2173100200005 MONITOR (91-PA-231(N,F)42-MO-99,CHN,FY) Value taken as 2.57 % 2173100200006 STATUS (TABLE) Table 1 in Radiochimica Acta,v.11,p.108,1969 2173100200007 ENDBIB 5 0 2173100200008 COMMON 4 3 2173100200009 EN EN-RSL-HW MONIT MASS-NRM 2173100200010 MEV MEV PC/FIS NO-DIM 2173100200011 3.0 0.4 2.57 99. 2173100200012 ENDCOMMON 3 0 2173100200013 DATA 3 9 2173100200014 MASS DATA ERR-S 2173100200015 NO-DIM PC/FIS PC/FIS 2173100200016 8.3000E+01 2.5800E+00 2.4000E-01 2173100200017 8.4000E+01 3.9100E+00 1.4000E-01 2173100200018 9.1000E+01 5.8900E+00 8.0000E-02 2173100200019 9.7000E+01 3.9600E+00 1.2000E-01 2173100200020 1.0500E+02 2.4000E-01 2.0000E-02 2173100200021 1.1300E+02 7.2000E-02 1.0000E-02 2173100200022 1.2900E+02 8.1000E-01 5.0000E-02 2173100200023 1.4300E+02 5.1900E+00 9.0000E-02 2173100200024 1.4500E+02 3.2200E+00 2.0000E-02 2173100200025 ENDDATA 11 0 2173100200026 ENDSUBENT 25 0 2173100299999 SUBENT 21731003 20200520 22882173100300001 BIB 5 17 2173100300002 REACTION (91-PA-231(N,F),,SIG,,,DERIV) 2173100300003 ANALYSIS .The 14 MeV cross section was derived from the 2173100300004 product of the ratios... 2173100300005 - Mo-99 activity from Pa-231 and U-238 at 14 MeV; 2173100300006 - Mo-99 activity from Pa-231 and U-238 at 3 MeV; 2173100300007 - 99 mass chain yield at 14 MeV 2173100300008 from U-238 (5.6%) and Pa-231 (3.2%); 2173100300009 - 99 mass chain yield at 3 MeV 2173100300010 from Pa-231 (2.6%,this work) and U-238 (6.3%); 2173100300011 - U-238 fission cross section at 14 (1.25b) and 2173100300012 at 3 MeV (0.540b); 2173100300013 - Pa-231 fission cross section at 3 MeV (1.12 b). 2173100300014 Average value of 4 measurements - 2173100300015 1.75, 1.19, 1.47, 1.33 b. 2173100300016 MONITOR (92-U-238(N,F),,SIG) Value taken as 1.25 b at 14 MeV 2173100300017 MONIT-REF (,,R,BNL-325,1958) 2173100300018 STATUS (TABLE) Table 2 in Radiochimica Acta,v.11,p.108,1969 2173100300019 ENDBIB 17 0 2173100300020 NOCOMMON 0 0 2173100300021 DATA 5 1 2173100300022 EN EN-RSL-HW MONIT DATA ERR-S 2173100300023 MEV MEV B B B 2173100300024 1.4800E+01 3.0000E-01 1.25 1.43 0.12 2173100300025 ENDDATA 3 0 2173100300026 ENDSUBENT 25 0 2173100399999 SUBENT 21731004 20200520 22882173100400001 BIB 3 3 2173100400002 REACTION (91-PA-231(N,F)ELEM/MASS,CUM,FY) 2173100400003 STATUS (TABLE) Table 1 of Radiochimica Acta,v.16,p.103,1971 2173100400004 HISTORY (20200520C) Subent was added. 2173100400005 ENDBIB 3 0 2173100400006 COMMON 2 3 2173100400007 EN EN-RSL-HW 2173100400008 MEV MEV 2173100400009 3.0 0.4 2173100400010 ENDCOMMON 3 0 2173100400011 DATA 4 1 2173100400012 ELEMENT MASS DATA ERR-S 2173100400013 NO-DIM NO-DIM PC/FIS PC/FIS 2173100400014 51. 129. 0.92 0.05 2173100400015 ENDDATA 3 0 2173100400016 ENDSUBENT 15 0 2173100499999 SUBENT 21731005 20200520 22882173100500001 BIB 3 4 2173100500002 REACTION (91-PA-231(N,F)MASS,CHN,FY) 2173100500003 STATUS (TABLE) Table 1 of Radiochimica Acta,v.16,p.103,1971 2173100500004 Subent .005 supersedes data of Subent 002 for mass 1292173100500005 HISTORY (20200520C) Subent was added. 2173100500006 ENDBIB 4 0 2173100500007 COMMON 2 3 2173100500008 EN EN-RSL-HW 2173100500009 MEV MEV 2173100500010 3.0 0.4 2173100500011 ENDCOMMON 3 0 2173100500012 DATA 3 1 2173100500013 MASS DATA ERR-S 2173100500014 NO-DIM PC/FIS PC/FIS 2173100500015 129. 1.00 0.06 2173100500016 ENDDATA 3 0 2173100500017 ENDSUBENT 16 0 2173100599999 ENDENTRY 5 0 2173199999999