ENTRY C2481 20200225 C191C248100000001 SUBENT C2481001 20200225 C191C248100100001 BIB 10 25 C248100100002 TITLE Excitation Function for the 235U(alpha,3n) 236Pu C248100100003 Reaction C248100100004 AUTHOR (G.R.Bethune,H.C.Britt,B.H.Erkkila) C248100100005 REFERENCE (J,PR/C,6,1087,1972) C248100100006 #doi:10.1103/PhysRevC.6.1087 C248100100007 INSTITUTE (1USALAS) C248100100008 FACILITY (CYCLO,1USALAS) The Los Alamos variable energy C248100100009 cyclotron. C248100100010 SAMPLE (92-U-235,ENR=0.9973) The targets were 140-190 C248100100011 microg/cm2 UO2, deposits evaporated on carbon C248100100012 backings. The isotopic purity of 235U was 99.73%. C248100100013 DETECTOR (SIBAR) for offline decay alpha detection. C248100100014 The counting system was a 100-microm gold C248100100015 surface-barrier semiconductor detector whose solid C248100100016 angle was calibrated with a standardized C248100100017 alpha-particle source. C248100100018 (SOLST) for online fission fragment detection C248100100019 PART-DET (FF) C248100100020 METHOD (EXTB) Following each irradiation the target was C248100100021 removed from the beam and placed in a counting C248100100022 chamber to count the a activity which had been C248100100023 produced in the target. During each irradiation the C248100100024 prompt-fission yield was measured by using a C248100100025 semiconductor detector to count fission fragments. C248100100026 HISTORY (20200225C) BP C248100100027 ENDBIB 25 0 C248100100028 COMMON 1 3 C248100100029 EN-ERR C248100100030 MEV C248100100031 0.2 C248100100032 ENDCOMMON 3 0 C248100100033 ENDSUBENT 32 0 C248100199999 SUBENT C2481002 20200225 C191C248100200001 BIB 3 8 C248100200002 REACTION (92-U-235(A,F),,SIG) C248100200003 ERR-ANALYS (DATA-ERR) The absolute fission cross sections were C248100200004 measured to an over-all accuracy of +-10%. This error C248100200005 includes the uncertainty in the beam-current C248100200006 integration, the uncertainty in measured target C248100200007 thicknesses, and the uncertainty in the detector C248100200008 solid angle. C248100200009 STATUS (TABLE) Table I, page 1088. C248100200010 ENDBIB 8 0 C248100200011 COMMON 1 3 C248100200012 DATA-ERR C248100200013 PER-CENT C248100200014 10.0 C248100200015 ENDCOMMON 3 0 C248100200016 DATA 2 9 C248100200017 EN DATA C248100200018 MEV MB C248100200019 24.46 282.0 C248100200020 25.32 384.0 C248100200021 25.66 438.0 C248100200022 26.17 506.0 C248100200023 26.51 537.0 C248100200024 26.76 605.0 C248100200025 27.10 594.0 C248100200026 27.36 668.0 C248100200027 27.94 756.0 C248100200028 ENDDATA 11 0 C248100200029 ENDSUBENT 28 0 C248100299999 SUBENT C2481003 20200225 C191C248100300001 BIB 4 6 C248100300002 REACTION ((92-U-235(A,X)94-PU-236,CUM,SIG)/(92-U-235(A,F),,SIG))C248100300003 RAD-DET (94-PU-236,A) C248100300004 ERR-ANALYS (DATA-ERR) Systematic errors have been minimized in C248100300005 the ratios presented here, and the majority of C248100300006 reported errors are statistical in nature. C248100300007 STATUS (TABLE) Table I, page 1088. C248100300008 ENDBIB 6 0 C248100300009 NOCOMMON 0 0 C248100300010 DATA 3 10 C248100300011 EN DATA DATA-ERR C248100300012 MEV NO-DIM NO-DIM C248100300013 24.46 1.18E-4 0.08E-4 C248100300014 25.32 3.79E-4 0.11E-4 C248100300015 25.66 6.26E-4 0.24E-4 C248100300016 25.95 10.3E-4 0.5E-4 C248100300017 26.17 12.1E-4 0.8E-4 C248100300018 26.51 16.8E-4 0.8E-4 C248100300019 26.76 20.9E-4 1.0E-4 C248100300020 27.10 25.4E-4 1.0E-4 C248100300021 27.36 28.9E-4 1.1E-4 C248100300022 27.94 42.2E-4 2.0E-4 C248100300023 ENDDATA 12 0 C248100300024 ENDSUBENT 23 0 C248100399999 SUBENT C2481004 20200225 C191C248100400001 BIB 4 9 C248100400002 REACTION ((92-U-235(A,3N)94-PU-236,,SIG)/(92-U-235(A,F),,SIG)) C248100400003 ANALYSIS (DECAY) Separation of 236Pu and 236Np production C248100400004 contribution to the measured decay alpha activity C248100400005 ERR-ANALYS (DATA-ERR) Systematic errors have been minimized in C248100400006 the ratios presented here, and the majority of C248100400007 reported errors are statistical in nature. C248100400008 STATUS (TABLE) Table I, page 1088. C248100400009 (DEP,C2481003) 246Pu production cumulative cross C248100400010 section C248100400011 ENDBIB 9 0 C248100400012 NOCOMMON 0 0 C248100400013 DATA 3 9 C248100400014 EN DATA DATA-ERR C248100400015 MEV NO-DIM NO-DIM C248100400016 25.32 1.40E-4 0.50E-4 C248100400017 25.66 3.10E-4 0.60E-4 C248100400018 25.95 6.42E-4 0.53E-4 C248100400019 26.17 8.33E-4 0.39E-4 C248100400020 26.51 11.0E-4 1.4E-4 C248100400021 26.76 12.8E-4 2.0E-4 C248100400022 27.10 16.2E-4 1.0E-4 C248100400023 27.36 20.7E-4 2.8E-4 C248100400024 27.94 31.7E-4 2.6E-4 C248100400025 ENDDATA 11 0 C248100400026 ENDSUBENT 25 0 C248100499999 SUBENT C2481005 20200225 C191C248100500001 BIB 5 10 C248100500002 REACTION ((92-U-235(A,X)93-NP-236-M,,SIG)/(92-U-235(A,F),,SIG)) C248100500003 ANALYSIS (DECAY) Separation of 236Pu and 236Np production C248100500004 contribution to the measured decay alpha activity C248100500005 ERR-ANALYS (DATA-ERR) Systematic errors have been minimized in C248100500006 the ratios presented here, and the majority of C248100500007 reported errors are statistical in nature. C248100500008 DECAY-DATA (93-NP-236-M,22.0HR,B-) C248100500009 STATUS (TABLE) Table I, page 1088. C248100500010 (DEP,C2481003) 246Pu production cumulative cross C248100500011 section C248100500012 ENDBIB 10 0 C248100500013 NOCOMMON 0 0 C248100500014 DATA 3 7 C248100500015 EN DATA DATA-ERR C248100500016 MEV NO-DIM NO-DIM C248100500017 25.95 4.40E-4 0.63E-4 C248100500018 26.17 4.09E-4 0.48E-4 C248100500019 26.51 6.29E-4 1.74E-4 C248100500020 26.76 7.98E-4 2.00E-4 C248100500021 27.10 9.19E-4 0.80E-4 C248100500022 27.36 9.36E-4 3.38E-4 C248100500023 27.94 10.6E-4 3.4E-4 C248100500024 ENDDATA 9 0 C248100500025 ENDSUBENT 24 0 C248100599999 ENDENTRY 5 0 C248199999999