ENTRY C2489 20200303 C192C248900000001 SUBENT C2489001 20200303 C192C248900100001 BIB 10 23 C248900100002 TITLE Fission Product Yields in Helium Ion-Induced Fission C248900100003 of Au197, Pb204, and Pb206 Targets C248900100004 AUTHOR (E.F.Neuzil,A.W.Fairhall) C248900100005 REFERENCE (J,PR,129,2705,1963) C248900100006 #doi:10.1103/PhysRev.129.2705 C248900100007 INSTITUTE (1USAWAU) C248900100008 FACILITY (CYCLO,1USAWAU) The University of Washington 60-in. C248900100009 cyclotron. C248900100010 DETECTOR (GEMUC) A set of four end-window Geiger-Muller C248900100011 counters. C248900100012 METHOD (CHSEP) Mass-yield curves have been measured C248900100013 radiochemically. C248900100014 ANALYSIS (DECAY) The decay curves were plotted and analyzed in C248900100015 the usual way, and the half-lives of the component C248900100016 species always agreed closely with the values for C248900100017 known fission product species of the elements being C248900100018 counted. C248900100019 CORRECTION Corrections for absorption of the radiations by air, C248900100020 polystyrene, and counter window; and for scattering C248900100021 by Scotch tape, filter paper, polystyrene, air, and C248900100022 counter housing. Sample absorption and scattering C248900100023 corrections were made. C248900100024 HISTORY (20200303C) BP C248900100025 ENDBIB 23 0 C248900100026 COMMON 1 3 C248900100027 EN C248900100028 MEV C248900100029 41.9 C248900100030 ENDCOMMON 3 0 C248900100031 ENDSUBENT 30 0 C248900199999 SUBENT C2489002 20200303 C192C248900200001 BIB 4 10 C248900200002 REACTION (79-AU-197(A,F)MASS,CHN,FY) C248900200003 SAMPLE Pure gold was readily available in 4 in.x4 in. sheets, C248900200004 ~2.6 mg/cm2 thick, as dental gold foil. The gold C248900200005 target consisted of several thicknesses of this foil C248900200006 cut into a strip approximately 1cm by 8cm. It was C248900200007 bombarded between two pure aluminum foils, each about C248900200008 3 mg/cm2 thick, which served to catch fission C248900200009 fragments escaping from the target foil. C248900200010 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C248900200011 STATUS (CURVE) Fig. 3, page 2709. C248900200012 ENDBIB 10 0 C248900200013 NOCOMMON 0 0 C248900200014 DATA 4 12 C248900200015 MASS DATA DATA-ERR DATA-MIN C248900200016 NO-DIM PC/FIS PC/FIS PC/FIS C248900200017 71.770 1.815E+00 C248900200018 76.899 1.926E+00 1.162E-01 C248900200019 82.904 2.569E+00 C248900200020 90.781 5.092E+00 6.592E-01 C248900200021 91.965 3.637E+00 C248900200022 92.504 5.882E+00 C248900200023 96.641 5.372E+00 9.775E-01 C248900200024 104.570 5.523E+00 4.061E-01 C248900200025 108.708 5.073E+00 6.316E-01 C248900200026 110.660 5.145E+00 9.836E-01 C248900200027 111.835 3.365E+00 4.768E-01 C248900200028 113.114 1.853E+00 C248900200029 ENDDATA 14 0 C248900200030 ENDSUBENT 29 0 C248900299999 SUBENT C2489003 20200303 C192C248900300001 BIB 4 8 C248900300002 REACTION (82-PB-206(A,F)MASS,CHN,FY) C248900300003 SAMPLE A Pb206 target 2.55 mg/cm2 thick plated on gold foil C248900300004 was bombarded between two aluminum foils. C248900300005 (82-PB-206,ENR=0.895) C248900300006 (82-PB-207,ENR=0.081) C248900300007 (82-PB-208,ENR=0.024) C248900300008 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C248900300009 STATUS (CURVE) Fig. 1, page 2707. C248900300010 ENDBIB 8 0 C248900300011 NOCOMMON 0 0 C248900300012 DATA 3 12 C248900300013 MASS DATA DATA-ERR C248900300014 NO-DIM PC/FIS PC/FIS C248900300015 77.103 4.992E-01 C248900300016 83.004 1.106E+00 1.389E-01 C248900300017 90.730 3.451E+00 2.797E-01 C248900300018 91.803 3.947E+00 5.805E-01 C248900300019 92.661 6.023E+00 C248900300020 96.845 5.674E+00 1.292E+00 C248900300021 98.777 8.156E+00 1.095E+00 C248900300022 104.678 7.239E+00 C248900300023 108.755 6.083E+00 C248900300024 110.901 4.961E+00 C248900300025 111.974 3.850E+00 5.003E-01 C248900300026 112.940 3.627E+00 3.919E-01 C248900300027 ENDDATA 14 0 C248900300028 ENDSUBENT 27 0 C248900399999 SUBENT C2489004 20200303 C192C248900400001 BIB 4 13 C248900400002 REACTION (82-PB-204(A,F)MASS,CHN,FY) C248900400003 SAMPLE The sample of Pb204 was first made into an C248900400004 electroplating solution from which targets were C248900400005 prepared by electrodeposition on thin (2.6 mg/cm2) C248900400006 gold foil. The amount of lead in each target was about C248900400007 1 mg, deposited over approximately 1.5 cm2 of gold C248900400008 foil. C248900400009 (82-PB-204,ENR=0.391) C248900400010 (82-PB-206,ENR=0.308) C248900400011 (82-PB-207,ENR=0.125) C248900400012 (82-PB-208,ENR=0.177) C248900400013 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C248900400014 STATUS (CURVE) Fig. 2, page 2708. C248900400015 ENDBIB 13 0 C248900400016 NOCOMMON 0 0 C248900400017 DATA 4 10 C248900400018 MASS DATA DATA-ERR DATA-MIN C248900400019 NO-DIM PC/FIS PC/FIS PC/FIS C248900400020 76.952 1.189E+00 2.319E-01 C248900400021 82.925 2.516E+00 3.706E-01 C248900400022 90.969 3.229E+00 C248900400023 91.855 5.781E+00 C248900400024 93.003 4.296E+00 1.712E+00 C248900400025 96.913 5.107E+00 C248900400026 99.050 5.891E+00 6.276E-01 C248900400027 108.922 4.257E+00 1.718E+00 C248900400028 111.137 3.297E+00 C248900400029 112.871 2.345E+00 C248900400030 ENDDATA 12 0 C248900400031 ENDSUBENT 30 0 C248900499999 SUBENT C2489005 20200303 C192C248900500001 BIB 4 20 C248900500002 REACTION (82-PB-204(A,F)39-Y-93,(CUM),SIG) C248900500003 SAMPLE The sample of Pb204 was first made into an C248900500004 electroplating solution from which targets were C248900500005 prepared by electrodeposition on thin (2.6 mg/cm2) C248900500006 gold foil. The amount of lead in each target was about C248900500007 1 mg, deposited over approximately 1.5 cm2 of gold C248900500008 foil. C248900500009 (82-PB-204,ENR=0.391) C248900500010 (82-PB-206,ENR=0.308) C248900500011 (82-PB-207,ENR=0.125) C248900500012 (82-PB-208,ENR=0.177) C248900500013 ANALYSIS Targets of each of the four enriched lead isotopes C248900500014 were bombarded with 41.9-MeV helium ions and the C248900500015 cross-sectional yields for formation of Y93 were C248900500016 determined radiochemically. From the knowledge of the C248900500017 isotopic composition of each target it was possible C248900500018 to solve four simultaneous equations in four unknowns C248900500019 for the formation cross section of Y93 of each of the C248900500020 four lead isotopes separately. C248900500021 STATUS (TABLE) page 2707. C248900500022 ENDBIB 20 0 C248900500023 NOCOMMON 0 0 C248900500024 DATA 1 1 C248900500025 DATA C248900500026 MB C248900500027 0.34 C248900500028 ENDDATA 3 0 C248900500029 ENDSUBENT 28 0 C248900599999 SUBENT C2489006 20200303 C192C248900600001 BIB 4 15 C248900600002 REACTION (82-PB-206(A,F)39-Y-93,(CUM),SIG) C248900600003 SAMPLE A Pb206 target 2.55 mg/cm2 thick plated on gold foil C248900600004 was bombarded between two aluminum foils. C248900600005 (82-PB-206,ENR=0.895) C248900600006 (82-PB-207,ENR=0.081) C248900600007 (82-PB-208,ENR=0.024) C248900600008 ANALYSIS Targets of each of the four enriched lead isotopes C248900600009 were bombarded with 41.9-MeV helium ions and the C248900600010 cross-sectional yields for formation of Y93 were C248900600011 determined radiochemically. From the knowledge of the C248900600012 isotopic composition of each target it was possible C248900600013 to solve four simultaneous equations in four unknowns C248900600014 for the formation cross section of Y93 of each of the C248900600015 four lead isotopes separately. C248900600016 STATUS (TABLE) page 2707. C248900600017 ENDBIB 15 0 C248900600018 NOCOMMON 0 0 C248900600019 DATA 1 1 C248900600020 DATA C248900600021 MB C248900600022 0.049 C248900600023 ENDDATA 3 0 C248900600024 ENDSUBENT 23 0 C248900699999 SUBENT C2489007 20200303 C192C248900700001 BIB 4 14 C248900700002 REACTION (82-PB-207(A,F)39-Y-93,(CUM),SIG) C248900700003 SAMPLE (82-PB-204,ENR=0.002) C248900700004 (82-PB-206,ENR=0.035) C248900700005 (82-PB-207,ENR=0.715) C248900700006 (82-PB-208,ENR=0.250) C248900700007 ANALYSIS Targets of each of the four enriched lead isotopes C248900700008 were bombarded with 41.9-MeV helium ions and the C248900700009 cross-sectional yields for formation of Y93 were C248900700010 determined radiochemically. From the knowledge of the C248900700011 isotopic composition of each target it was possible C248900700012 to solve four simultaneous equations in four unknowns C248900700013 for the formation cross section of Y93 of each of the C248900700014 four lead isotopes separately. C248900700015 STATUS (TABLE) page 2707. C248900700016 ENDBIB 14 0 C248900700017 NOCOMMON 0 0 C248900700018 DATA 1 1 C248900700019 DATA C248900700020 MB C248900700021 0.092 C248900700022 ENDDATA 3 0 C248900700023 ENDSUBENT 22 0 C248900799999 SUBENT C2489008 20200303 C192C248900800001 BIB 4 14 C248900800002 REACTION (82-PB-208(A,F)39-Y-93,(CUM),SIG) C248900800003 SAMPLE (82-PB-204,ENR=0.0007) C248900800004 (82-PB-206,ENR=0.020) C248900800005 (82-PB-207,ENR=0.100) C248900800006 (82-PB-208,ENR=0.880) C248900800007 ANALYSIS Targets of each of the four enriched lead isotopes C248900800008 were bombarded with 41.9-MeV helium ions and the C248900800009 cross-sectional yields for formation of Y93 were C248900800010 determined radiochemically. From the knowledge of the C248900800011 isotopic composition of each target it was possible C248900800012 to solve four simultaneous equations in four unknowns C248900800013 for the formation cross section of Y93 of each of the C248900800014 four lead isotopes separately. C248900800015 STATUS (TABLE) page 2707. C248900800016 ENDBIB 14 0 C248900800017 NOCOMMON 0 0 C248900800018 DATA 1 1 C248900800019 DATA C248900800020 MB C248900800021 0.015 C248900800022 ENDDATA 3 0 C248900800023 ENDSUBENT 22 0 C248900899999 ENDENTRY 8 0 C248999999999