ENTRY 14292 20120411 13791429200000001 SUBENT 14292001 20120411 13791429200100001 BIB 11 43 1429200100002 TITLE Surrogate measurement of the 238Pu(n,f) cross section 1429200100003 AUTHOR (J.J.Ressler,J.T.Burke,J.E.Escher,C.T.Angell, 1429200100004 M.S.Basunia,C.W.Beausang,L.A.Bernstein,D.L.Bleuel, 1429200100005 R.J.Casperson,B.L.Goldblum,J.Gostic,R.Hatarik, 1429200100006 R.Henderson,R.O.Hughes,J.Munson,L.W.Phair,T.J.Ross, 1429200100007 N.D.Scielzo,E.Swanberg,I.J.Thompson,M.Wiedeking) 1429200100008 INSTITUTE (1USALRL,1USABRK,2UK SUR) 1429200100009 (1USAUSA) University of Richmond, Richmond, Virginia 1429200100010 REFERENCE (J,PR/C,83,054610,2011) Main reference 1429200100011 (J,KPS,59,1892,2011) Preliminary data 1429200100012 FACILITY (CYCLO,1USABRK)Experiment performed at the 88-Inch 1429200100013 Cyclotron at Lawrence Berkeley National Laboratory. 1429200100014 SAMPLE (94-PU-239,ENR=0.99) with thickness of 140 mu-g/cm2 1429200100015 (92-U-235,ENR=0.99)with thickness of 416 mu-g/cm2 1429200100016 (92-U-236,ENR=0.99)with thickness of 322 mu-g/cm2 1429200100017 DETECTOR (TELES,SISD,SISD) Emitted particles and fission 1429200100018 fragments were detected in the Silicon Telescope 1429200100019 Array for Reaction Studies (STARS). 1429200100020 The STARS array is comprised of a series of 1429200100021 double-sided, annular Si detectors for particle 1429200100022 detection. Each detector is segmented into 48 rings 1429200100023 and 16 sectors; adjacent rings and sectors are 1429200100024 combined for a total of 24 rings and 8 sectors. The 1429200100025 array consisted of two detector telescopes downstream 1429200100026 of the target for reaction channel identification, 1429200100027 and a third telescope, upstream from the target, for 1429200100028 fission tagging. The downstream detectors consisted 1429200100029 of 150mu-m and 1003 mu-m thick detectors, 1429200100030 respectively. This telescope array covered a range of 1429200100031 31deg to 61deg at forward angles, relative to the 1429200100032 beam axis. The third detector, 140 mu-m thick, was 1429200100033 placed 8.9-mm upstream of the target for fission 1429200100034 tagging. This detector subtended angles of 142deg to 1429200100035 165deg relative to the beam axis. 1429200100036 METHOD (EDE) Particle identification using E-dE method 1429200100037 MONITOR 1(92-U-234(A,A+F),,SIG) 1429200100038 2(92-U-235(A,A+F),,SIG) 1429200100039 HISTORY (20110608C) Compiled by S.H. 1429200100040 (20111107A) OS. Heading corrected in sub.2 1429200100041 (20120325A) S.H. Reference with preliminary data added 1429200100042 Status of subs. 2,3 updated 1429200100043 ERR-ANALYS (ERR-T) Total uncertainty 1429200100044 (EN-ERR) Energy uncertainty 1429200100045 ENDBIB 43 0 1429200100046 COMMON 1 3 1429200100047 EN-ERR 1429200100048 KEV 1429200100049 126.0 1429200100050 ENDCOMMON 3 0 1429200100051 ENDSUBENT 50 0 1429200199999 SUBENT 14292002 20120503 13791429200200001 BIB 4 19 1429200200002 REACTION 1(94-PU-238(N,F),,SIG) XS determined using monitor 1 1429200200003 2(94-PU-238(N,F),,SIG) XS determined using monitor 2 1429200200004 STATUS (TABLE) Data presented in fig. 10 of the main reference1429200200005 sent by author (J.J.R) 1429200200006 ANALYSIS (SURGT) Fission cross section of 238Pu was determined 1429200200007 using the surrogate ratio method. The (n,f) cross 1429200200008 section was deduced from inelastic alpha induced 1429200200009 fission reaction on 239Pu(a,af) (which served as 1429200200010 surrogate reaction) with 235U(a,af) and 1429200200011 236U(a,af) used as references. Cross section ratios 1429200200012 239Pu(a,af)/235U(a,af) and 239Pu(a,af)/236U(a,af) 1429200200013 were determined experimentally. Experimental ratios 1429200200014 were multiplied by compound nucleus formation cross 1429200200015 section and reference 234U(n,f),235U(n,f) cross 1429200200016 section. Reference cross sections were calculated 1429200200017 using the statistical reactions code STAPRE. The 1429200200018 formation cross sections were calculated using the 1429200200019 optical-model potential Flap2.2. 1429200200020 HISTORY (20111107A) OS. Error heading corrected 1429200200021 ENDBIB 19 0 1429200200022 NOCOMMON 0 0 1429200200023 DATA 5 75 1429200200024 EN DATA 1ERR-T 1DATA 2ERR-T 2 1429200200025 MEV B B B B 1429200200026 5.0 2.16 0.15 1.94 0.10 1429200200027 5.2 2.35 0.16 2.28 0.12 1429200200028 5.4 2.40 0.17 2.36 0.13 1429200200029 5.6 2.50 0.18 2.40 0.13 1429200200030 5.8 2.45 0.18 2.38 0.13 1429200200031 6.0 2.59 0.18 2.49 0.14 1429200200032 6.2 2.68 0.20 2.44 0.13 1429200200033 6.4 2.85 0.21 2.73 0.15 1429200200034 6.6 3.10 0.22 2.85 0.15 1429200200035 6.8 3.09 0.21 2.86 0.15 1429200200036 7.0 2.81 0.19 2.73 0.14 1429200200037 7.2 3.28 0.21 3.06 0.15 1429200200038 7.4 3.21 0.21 2.80 0.14 1429200200039 7.6 3.31 0.22 2.85 0.14 1429200200040 7.8 3.16 0.20 2.74 0.13 1429200200041 8.0 3.08 0.19 2.80 0.13 1429200200042 8.2 3.22 0.20 2.89 0.14 1429200200043 8.4 3.23 0.20 2.81 0.13 1429200200044 8.6 2.80 0.18 2.58 0.13 1429200200045 8.8 2.92 0.19 2.65 0.13 1429200200046 9.0 3.19 0.20 2.73 0.13 1429200200047 9.2 3.24 0.21 2.93 0.14 1429200200048 9.4 2.86 0.18 2.85 0.14 1429200200049 9.6 2.80 0.17 2.93 0.14 1429200200050 9.8 2.70 0.16 2.75 0.13 1429200200051 10.0 2.81 0.18 2.55 0.12 1429200200052 10.2 3.13 0.20 2.71 0.13 1429200200053 10.4 2.92 0.18 2.84 0.14 1429200200054 10.6 2.58 0.16 2.73 0.14 1429200200055 10.8 2.85 0.18 2.93 0.14 1429200200056 11.0 2.83 0.18 2.99 0.15 1429200200057 11.2 2.88 0.19 2.95 0.15 1429200200058 11.4 3.04 0.20 2.88 0.14 1429200200059 11.6 2.89 0.19 2.82 0.14 1429200200060 11.8 2.93 0.19 2.89 0.15 1429200200061 12.0 2.93 0.19 2.89 0.14 1429200200062 12.2 2.98 0.20 2.89 0.15 1429200200063 12.4 2.85 0.19 2.78 0.14 1429200200064 12.6 2.94 0.20 2.85 0.14 1429200200065 12.8 3.16 0.21 3.14 0.16 1429200200066 13.0 2.82 0.19 3.02 0.15 1429200200067 13.2 3.01 0.20 3.09 0.16 1429200200068 13.4 3.18 0.22 3.09 0.15 1429200200069 13.6 2.82 0.19 2.89 0.14 1429200200070 13.8 2.88 0.19 2.98 0.14 1429200200071 14.0 3.06 0.20 3.09 0.15 1429200200072 14.2 3.27 0.22 3.27 0.16 1429200200073 14.4 3.22 0.22 3.12 0.15 1429200200074 14.6 3.08 0.20 3.07 0.15 1429200200075 14.8 3.20 0.21 3.27 0.16 1429200200076 15.0 3.22 0.21 3.03 0.15 1429200200077 15.2 3.45 0.23 3.06 0.15 1429200200078 15.4 3.41 0.22 3.26 0.15 1429200200079 15.6 3.17 0.21 3.03 0.15 1429200200080 15.8 3.59 0.24 3.10 0.15 1429200200081 16.0 3.33 0.22 3.06 0.14 1429200200082 16.2 3.05 0.19 3.12 0.15 1429200200083 16.4 3.10 0.20 3.12 0.15 1429200200084 16.6 3.37 0.22 3.22 0.15 1429200200085 16.8 3.25 0.21 3.20 0.15 1429200200086 17.0 3.19 0.21 3.19 0.15 1429200200087 17.2 2.88 0.19 2.97 0.15 1429200200088 17.4 3.20 0.21 3.17 0.15 1429200200089 17.6 3.15 0.20 2.99 0.14 1429200200090 17.8 3.25 0.21 3.10 0.15 1429200200091 18.0 3.22 0.22 2.97 0.15 1429200200092 18.2 3.13 0.21 3.02 0.15 1429200200093 18.4 3.21 0.21 3.27 0.16 1429200200094 18.6 3.14 0.21 3.26 0.16 1429200200095 18.8 3.25 0.22 3.09 0.15 1429200200096 19.0 3.12 0.21 3.05 0.15 1429200200097 19.2 3.07 0.20 3.12 0.15 1429200200098 19.4 3.07 0.21 3.05 0.15 1429200200099 19.6 3.09 0.21 3.16 0.16 1429200200100 19.8 2.99 0.20 3.04 0.16 1429200200101 ENDDATA 77 0 1429200200102 ENDSUBENT 101 0 1429200299999 SUBENT 14292003 20120503 13791429200300001 BIB 2 4 1429200300002 REACTION (94-PU-238(N,F),,SIG) Weighted average value 1429200300003 from the two surrogate reactions 1429200300004 STATUS (CURVE) data taken from fig. 12 of the main reference 1429200300005 (DEP,14292002) Low energy part not in 14292002 1429200300006 ENDBIB 4 0 1429200300007 NOCOMMON 0 0 1429200300008 DATA 3 95 1429200300009 EN DATA ERR-T 1429200300010 MEV B B 1429200300011 1.01 1.71 0.08 1429200300012 1.22 1.75 0.07 1429200300013 1.42 1.98 0.09 1429200300014 1.61 2.07 0.09 1429200300015 1.82 2.22 0.09 1429200300016 2.01 2.29 0.09 1429200300017 2.21 2.18 0.10 1429200300018 2.40 2.15 0.10 1429200300019 2.60 2.24 0.10 1429200300020 2.82 2.30 0.10 1429200300021 3.03 2.41 0.10 1429200300022 3.22 2.36 0.10 1429200300023 3.41 2.16 0.09 1429200300024 3.61 2.09 0.08 1429200300025 3.81 2.06 0.09 1429200300026 4.02 2.00 0.08 1429200300027 4.22 2.12 0.09 1429200300028 4.40 2.17 0.10 1429200300029 4.63 2.23 0.09 1429200300030 4.81 2.05 0.08 1429200300031 5.02 2.03 0.10 1429200300032 5.22 2.30 0.09 1429200300033 5.41 2.38 0.10 1429200300034 5.63 2.44 0.10 1429200300035 5.80 2.41 0.11 1429200300036 6.01 2.53 0.10 1429200300037 6.23 2.53 0.10 1429200300038 6.41 2.78 0.12 1429200300039 6.62 2.95 0.13 1429200300040 6.83 2.95 0.12 1429200300041 7.01 2.76 0.11 1429200300042 7.22 3.15 0.13 1429200300043 7.43 2.95 0.12 1429200300044 7.63 3.02 0.13 1429200300045 7.81 2.89 0.12 1429200300046 8.02 2.90 0.11 1429200300047 8.23 3.01 0.13 1429200300048 8.44 2.96 0.12 1429200300049 8.63 2.66 0.11 1429200300050 8.81 2.75 0.11 1429200300051 9.03 2.89 0.11 1429200300052 9.23 3.04 0.13 1429200300053 9.42 2.85 0.12 1429200300054 9.63 2.87 0.12 1429200300055 9.83 2.74 0.11 1429200300056 10.03 2.64 0.11 1429200300057 10.22 2.86 0.11 1429200300058 10.43 2.87 0.11 1429200300059 10.61 2.66 0.10 1429200300060 10.83 2.89 0.12 1429200300061 11.04 2.92 0.11 1429200300062 11.22 2.92 0.13 1429200300063 11.43 2.94 0.12 1429200300064 11.62 2.85 0.12 1429200300065 11.84 2.90 0.11 1429200300066 12.03 2.90 0.11 1429200300067 12.22 2.92 0.12 1429200300068 12.41 2.80 0.13 1429200300069 12.61 2.89 0.12 1429200300070 12.83 3.14 0.13 1429200300071 13.02 2.94 0.12 1429200300072 13.22 3.06 0.13 1429200300073 13.43 3.12 0.13 1429200300074 13.62 2.86 0.12 1429200300075 13.83 2.94 0.12 1429200300076 14.03 3.07 0.12 1429200300077 14.21 3.27 0.12 1429200300078 14.42 3.16 0.13 1429200300079 14.63 3.07 0.13 1429200300080 14.83 3.24 0.14 1429200300081 15.02 3.09 0.12 1429200300082 15.23 3.19 0.13 1429200300083 15.43 3.32 0.13 1429200300084 15.63 3.08 0.11 1429200300085 15.81 3.26 0.13 1429200300086 16.03 3.16 0.12 1429200300087 16.21 3.09 0.12 1429200300088 16.42 3.11 0.13 1429200300089 16.63 3.27 0.13 1429200300090 16.81 3.22 0.13 1429200300091 17.02 3.19 0.13 1429200300092 17.23 2.93 0.12 1429200300093 17.43 3.18 0.13 1429200300094 17.62 3.04 0.13 1429200300095 17.82 3.14 0.13 1429200300096 18.00 3.05 0.12 1429200300097 18.23 3.05 0.12 1429200300098 18.43 3.25 0.14 1429200300099 18.62 3.21 0.14 1429200300100 18.82 3.15 0.13 1429200300101 19.02 3.07 0.13 1429200300102 19.23 3.09 0.13 1429200300103 19.43 3.05 0.13 1429200300104 19.62 3.13 0.13 1429200300105 19.85 3.01 0.13 1429200300106 ENDDATA 97 0 1429200300107 ENDSUBENT 106 0 1429200399999 ENDENTRY 3 0 1429299999999