ENTRY 14250 20090609 13581425000000001 SUBENT 14250001 20090609 13581425000100001 BIB 9 31 1425000100002 TITLE Surrogate ratio method in the actinide region using 1425000100003 the (alpha,alpha'f) reaction 1425000100004 AUTHOR (S.R.Lesher,J.T.Burke,L.A.Bernstein,H.Ai, 1425000100005 C.W.Beausang,D.L.Bleuel,R.M.Clark,F.S.Dietrich, 1425000100006 J.E.Escher,P.Fallon,J.Gibelin,B.L.Goldblum,I.Y.Lee, 1425000100007 A.O.Macchiavelli,M.A.Mcmahan,K.J.Moody,E.B.Norman, 1425000100008 L.Phair,E.Rodriguez-Vieitez,N.D.Scielzo,M.Wiedeking) 1425000100009 INSTITUTE (1USALRL,1USAYAL,1USABRK) 1425000100010 (1USAUSA)University of Richmond,Richmond,Virginia 1425000100011 (1USAUSA)University of California,Berkeley,California 1425000100012 REFERENCE (J,PR/C,79,044609,2009) 1425000100013 #doi:10.1103/PhysRevC.79.044609 1425000100014 FACILITY (CYCLO,1USABRK) Alpha-particle beam from the 88-Inch 1425000100015 Cyclotron at Lawrence Berkeley National Laboratory. 1425000100016 SAMPLE Each target was made by electroplating uranium onto 1425000100017 a 2.29 mg/cm2 Ta foil. The 234U fission target had 1425000100018 an areal density of 253+-8 mu-g/cm2 and the 236U 1425000100019 target consisted of 99.68% 236U and 0.32% 234U with 1425000100020 an areal density of 184+-5 mu-g/cm2. 1425000100021 DETECTOR (TELES,SISD,SISD)The Silicon Telescope Array for 1425000100022 Reaction Studies (STARS) was used to detect 1425000100023 scattered alpha particles in coincidence with 1425000100024 outgoing fission fragments.The STARS array consisted 1425000100025 of three double-sided silicon strip detectors, each 1425000100026 segmented into 48 rings and 16 sectors. Each 1425000100027 detector had adjacent rings and sectors bussed 1425000100028 together for a total of 24 rings and 8 sectors. 1425000100029 (TELES,SI,SI)The particle telescope consisted of two 1425000100030 detectors, a 152 mu-m dE and a 994 mu-m E detector. 1425000100031 METHOD (EDE,COINC) 1425000100032 HISTORY (20090609C) Compiled by S.H. 1425000100033 ENDBIB 31 0 1425000100034 NOCOMMON 0 0 1425000100035 ENDSUBENT 34 0 1425000199999 SUBENT 14250002 20090609 13581425000200001 BIB 5 23 1425000200002 REACTION ((92-U-233(N,F),,SIG,,,DERIV)/ 1425000200003 (92-U-235(N,F),,SIG,,,DERIV)) 1425000200004 STATUS (CURVE) Data taken from fig. 6 of the reference 1425000200005 Waiting for data from the author 1425000200006 ERR-ANALYS (ERR-T) Total uncertainty 1425000200007 (ERR-S,3.0,5.0) Statistical uncertainty 1425000200008 (ERR-1) Systematic uncertainty arising from 1425000200009 uncertainty in target thickness 1425000200010 (ERR-2) Systematic uncertainty arising from 1425000200011 the choice of fragment energy threshold1425000200012 (EN-ERR1) Minimal value of energy uncertainty 1425000200013 (EN-ERR2) Maximal value of energy uncertainty, which 1425000200014 is energy dependent 1425000200015 ANALYSIS (SURGT) Ratio of fission probabilities was determined 1425000200016 using the Surrogate Method, based on the assumption 1425000200017 that a direct reaction can be used to form a compound 1425000200018 nucleus and the exit channel is independent of the 1425000200019 entrance channel. 1425000200020 CRITIQUE Weak point of the surrogate method is the assumption, 1425000200021 that a very similar distribution of compound states (in1425000200022 spin (J) x excitation energy (E) plane) is excited in 1425000200023 the neutron capture and surrogate direct reactions. 1425000200024 (Compiler's comment) 1425000200025 ENDBIB 23 0 1425000200026 COMMON 4 3 1425000200027 EN-ERR1 EN-ERR2 ERR-1 ERR-2 1425000200028 KEV KEV PER-CENT PER-CENT 1425000200029 130.0 164.0 4.2 2.2 1425000200030 ENDCOMMON 3 0 1425000200031 DATA 3 148 1425000200032 EN DATA ERR-T 1425000200033 MEV NO-DIM NO-DIM 1425000200034 0.40 1.55 0.10 1425000200035 0.52 1.37 0.09 1425000200036 0.64 1.46 0.09 1425000200037 0.78 1.43 0.10 1425000200038 0.87 1.56 0.10 1425000200039 1.00 1.49 0.10 1425000200040 1.13 1.40 0.09 1425000200041 1.23 1.53 0.11 1425000200042 1.39 1.53 0.10 1425000200043 1.50 1.49 0.10 1425000200044 1.60 1.54 0.10 1425000200045 1.72 1.38 0.10 1425000200046 1.84 1.51 0.11 1425000200047 1.97 1.56 0.11 1425000200048 2.08 1.52 0.10 1425000200049 2.21 1.55 0.10 1425000200050 2.34 1.53 0.11 1425000200051 2.44 1.45 0.10 1425000200052 2.57 1.40 0.09 1425000200053 2.68 1.48 0.10 1425000200054 2.79 1.53 0.10 1425000200055 2.94 1.52 0.10 1425000200056 3.05 1.42 0.10 1425000200057 3.16 1.33 0.10 1425000200058 3.29 1.69 0.12 1425000200059 3.41 1.54 0.11 1425000200060 3.54 1.51 0.11 1425000200061 3.63 1.37 0.09 1425000200062 3.77 1.40 0.09 1425000200063 3.88 1.32 0.09 1425000200064 4.01 1.29 0.09 1425000200065 4.13 1.51 0.10 1425000200066 4.25 1.47 0.10 1425000200067 4.35 1.50 0.10 1425000200068 4.49 1.36 0.10 1425000200069 4.60 1.38 0.10 1425000200070 4.73 1.45 0.10 1425000200071 4.85 1.42 0.10 1425000200072 4.96 1.47 0.11 1425000200073 5.09 1.54 0.11 1425000200074 5.20 1.44 0.11 1425000200075 5.32 1.46 0.10 1425000200076 5.45 1.41 0.10 1425000200077 5.57 1.38 0.10 1425000200078 5.68 1.37 0.11 1425000200079 5.81 1.40 0.10 1425000200080 5.93 1.39 0.11 1425000200081 6.04 1.43 0.10 1425000200082 6.16 1.28 0.09 1425000200083 6.30 1.26 0.09 1425000200084 6.41 1.33 0.09 1425000200085 6.51 1.23 0.09 1425000200086 6.65 1.29 0.09 1425000200087 6.77 1.39 0.09 1425000200088 6.90 1.19 0.08 1425000200089 7.00 1.40 0.09 1425000200090 7.12 1.36 0.09 1425000200091 7.23 1.19 0.08 1425000200092 7.37 1.13 0.08 1425000200093 7.48 1.26 0.08 1425000200094 7.62 1.25 0.09 1425000200095 7.72 1.33 0.09 1425000200096 7.84 1.29 0.08 1425000200097 7.96 1.30 0.09 1425000200098 8.08 1.25 0.09 1425000200099 8.19 1.28 0.08 1425000200100 8.32 1.23 0.08 1425000200101 8.46 1.27 0.09 1425000200102 8.57 1.26 0.07 1425000200103 8.68 1.17 0.08 1425000200104 8.81 1.23 0.08 1425000200105 8.92 1.27 0.09 1425000200106 9.04 1.27 0.09 1425000200107 9.15 1.26 0.09 1425000200108 9.28 1.25 0.09 1425000200109 9.39 1.28 0.08 1425000200110 9.53 1.25 0.09 1425000200111 9.65 1.32 0.09 1425000200112 9.75 1.25 0.08 1425000200113 9.87 1.25 0.08 1425000200114 10.01 1.29 0.08 1425000200115 10.13 1.24 0.08 1425000200116 10.23 1.32 0.09 1425000200117 10.37 1.22 0.08 1425000200118 10.49 1.22 0.08 1425000200119 10.62 1.30 0.09 1425000200120 10.74 1.36 0.09 1425000200121 10.84 1.25 0.09 1425000200122 10.98 1.32 0.09 1425000200123 11.09 1.25 0.09 1425000200124 11.20 1.35 0.09 1425000200125 11.33 1.22 0.08 1425000200126 11.44 1.36 0.09 1425000200127 11.55 1.34 0.09 1425000200128 11.68 1.36 0.09 1425000200129 11.81 1.24 0.08 1425000200130 11.93 1.19 0.08 1425000200131 12.04 1.29 0.08 1425000200132 12.17 1.19 0.08 1425000200133 12.29 1.34 0.08 1425000200134 12.40 1.17 0.07 1425000200135 12.52 1.29 0.09 1425000200136 12.64 1.35 0.09 1425000200137 12.78 1.39 0.09 1425000200138 12.90 1.31 0.09 1425000200139 13.00 1.17 0.08 1425000200140 13.15 1.22 0.08 1425000200141 13.25 1.26 0.08 1425000200142 13.37 1.34 0.08 1425000200143 13.51 1.29 0.07 1425000200144 13.62 1.16 0.08 1425000200145 13.73 1.21 0.07 1425000200146 13.86 1.21 0.08 1425000200147 13.95 1.30 0.08 1425000200148 14.08 1.15 0.07 1425000200149 14.22 1.13 0.07 1425000200150 14.34 1.14 0.07 1425000200151 14.44 1.30 0.08 1425000200152 14.57 1.26 0.08 1425000200153 14.69 1.16 0.08 1425000200154 14.81 1.26 0.08 1425000200155 14.92 1.17 0.07 1425000200156 15.03 1.13 0.07 1425000200157 15.17 1.18 0.07 1425000200158 15.28 1.18 0.07 1425000200159 15.41 1.22 0.08 1425000200160 15.53 1.29 0.08 1425000200161 15.64 1.12 0.07 1425000200162 15.77 1.24 0.07 1425000200163 15.88 1.15 0.07 1425000200164 16.00 1.21 0.08 1425000200165 16.11 1.17 0.07 1425000200166 16.24 1.17 0.08 1425000200167 16.37 1.13 0.07 1425000200168 16.48 1.32 0.09 1425000200169 16.60 1.22 0.08 1425000200170 16.73 1.22 0.07 1425000200171 16.84 1.19 0.08 1425000200172 16.97 1.27 0.08 1425000200173 17.06 1.17 0.07 1425000200174 17.21 1.21 0.07 1425000200175 17.34 1.18 0.07 1425000200176 17.46 1.21 0.08 1425000200177 17.57 1.24 0.08 1425000200178 17.69 1.20 0.08 1425000200179 17.80 1.17 0.08 1425000200180 17.93 1.19 0.07 1425000200181 18.06 1.13 0.07 1425000200182 ENDDATA 150 0 1425000200183 ENDSUBENT 182 0 1425000299999 ENDENTRY 2 0 1425099999999