ENTRY 14360 20130407 13901436000000001 SUBENT 14360001 20130407 13901436000100001 BIB 12 45 1436000100002 TITLE Determining the 239Np(n,f) cross section using the 1436000100003 surrogate ratio method 1436000100004 AUTHOR (A.Czeszumska,C.T.Angell,J.T.Burke,N.D.Scielzo, 1436000100005 E.B.Norman,R.A.E.Austin,G.Boutoux,R.J.Casperson, 1436000100006 P.Chodash,R.O.Hughes,C.M.Mattoon,V.Meot,J.Munson, 1436000100007 L.Phair,J.J.Ressler,O.Roig,T.J.Ross,E.Swanberg,B.Wang) 1436000100008 INSTITUTE (2JPNJAE,1USALRL,1USAUCX,1USABRK,2FR GRA,2FR BRC, 1436000100009 2FR GRA,2UK SUR) 1436000100010 (1CANCAN) Saint Mary's University, Halifax 1436000100011 (1USAUSA) University of Richmond, Richmond, Virginia 1436000100012 REFERENCE (J,PR/C,87,034613,2013) 1436000100013 FACILITY (CYCLO,1USABRK) The experiment was performed at the 1436000100014 88-Inch Cyclotron at Lawrence Berkeley National 1436000100015 Laboratory 1436000100016 SAMPLE 236U target with areal density of 320 mu-g/cm2 1436000100017 238U target with areal density of 220 mu-g/cm2 1436000100018 DETECTOR (TELES,SI,SI)Two Micron Semiconductor S2 double-sided 1436000100019 silicon detectors stacked together, referred to as 1436000100020 the dE (140 mu-m) and E (1000 mu-m) detectors, were 1436000100021 used to identify the light ions. 1436000100022 (SI) Array of six circular L-series detectors, each 1436000100023 5000 mu-m thick with an active area of 200 mm2 and 1436000100024 pointing concentrically toward the target at 45deg, 1436000100025 was placed behind the E detector to stop protons up 1436000100026 to 30 MeV in energy. 1436000100027 (SI) Upstream from the target, another 140 mu-m thick 1436000100028 S2 silicon detector was placed to detect fission 1436000100029 fragments. The S2 detectors were instrumented into 8 1436000100030 sector channels and 24 ring channels for the 1436000100031 electronics readout. 1436000100032 METHOD (EDE) E-dE method was used to identify charged 1436000100033 particles 1436000100034 (COINC) Coincidence between telescope for light ions 1436000100035 and Si detector for fission fragments was required 1436000100036 MONITOR (93-NP-237(N,F),,SIG) 1436000100037 MONIT-REF (,M.B.Chadwick+,J,NDS,112,2887,2011) 1436000100038 ANALYSIS (SURGT) Cross section determined by surrogate ratio 1436000100039 method. Reactions 236U (3He,p) and 238U(3He,p) 1436000100040 with the reference cross section given by the 1436000100041 well-known 237Np(n,f) cross section. The ratio of 1436000100042 observed fission reactions resulting from the two 1436000100043 formed compound nuclei, and 240Np,was multiplied 238Np 1436000100044 by the directly measured 237Np(n,f) cross section 1436000100045 to determine the 239Np(n,f) cross section. 1436000100046 HISTORY (20130407C) Compiled by S.H. 1436000100047 ENDBIB 45 0 1436000100048 NOCOMMON 0 0 1436000100049 ENDSUBENT 48 0 1436000199999 SUBENT 14360002 20130407 13901436000200001 BIB 3 4 1436000200002 REACTION (93-NP-239(N,F),,SIG) 1436000200003 STATUS (TABLE) Data presented fig. 9 of the reference 1436000200004 sent by author (A.Cz.) 1436000200005 ERR-ANALYS (ERR-S) Statistical uncertainty 1436000200006 ENDBIB 4 0 1436000200007 COMMON 1 3 1436000200008 EN-RSL 1436000200009 KEV 1436000200010 120.0 1436000200011 ENDCOMMON 3 0 1436000200012 DATA 3 62 1436000200013 EN DATA ERR-S 1436000200014 MEV B B 1436000200015 0.481 0.105912 0.0967439 1436000200016 0.781 0.062408 0.0267684 1436000200017 1.081 0.701536 0.211225 1436000200018 1.381 0.742741 0.183922 1436000200019 1.681 0.803565 0.188782 1436000200020 1.981 1.43405 0.286756 1436000200021 2.281 1.19138 0.236167 1436000200022 2.581 1.34449 0.253441 1436000200023 2.881 1.29405 0.235011 1436000200024 3.181 0.902023 0.160629 1436000200025 3.481 0.944947 0.169245 1436000200026 3.781 0.974843 0.158647 1436000200027 4.081 0.809589 0.125575 1436000200028 4.381 1.17263 0.163291 1436000200029 4.681 1.47251 0.196545 1436000200030 4.981 1.13027 0.145536 1436000200031 5.281 0.9357 0.117874 1436000200032 5.581 1.07621 0.131555 1436000200033 5.881 1.28274 0.147677 1436000200034 6.181 1.56492 0.163051 1436000200035 6.481 1.57196 0.151708 1436000200036 6.781 1.66229 0.148905 1436000200037 7.081 1.73091 0.148159 1436000200038 7.381 1.99201 0.160196 1436000200039 7.681 1.85298 0.146504 1436000200040 7.981 1.8688 0.137768 1436000200041 8.281 1.80449 0.125643 1436000200042 8.581 1.97119 0.128212 1436000200043 8.881 1.70704 0.106156 1436000200044 9.181 1.81001 0.106426 1436000200045 9.481 1.68989 0.0945831 1436000200046 9.781 1.71837 0.0917944 1436000200047 10.081 1.65526 0.0858389 1436000200048 10.381 1.60825 0.0807585 1436000200049 10.681 1.69899 0.0830622 1436000200050 10.981 1.74786 0.0835215 1436000200051 11.281 1.66357 0.0782954 1436000200052 11.581 1.65402 0.0767206 1436000200053 11.881 1.73941 0.0798112 1436000200054 12.181 1.65268 0.075926 1436000200055 12.481 1.75631 0.0803149 1436000200056 12.781 1.63893 0.0749236 1436000200057 13.081 1.65362 0.0759819 1436000200058 13.381 1.7204 0.0794847 1436000200059 13.681 1.80576 0.0841327 1436000200060 13.981 1.82268 0.0852658 1436000200061 14.281 1.80194 0.085901 1436000200062 14.581 1.8791 0.0913418 1436000200063 14.881 1.9698 0.0975889 1436000200064 15.181 1.90719 0.0971427 1436000200065 15.481 2.02173 0.106348 1436000200066 15.781 1.8878 0.103602 1436000200067 16.081 1.97598 0.113982 1436000200068 16.381 2.19933 0.131984 1436000200069 16.681 1.77647 0.116454 1436000200070 16.981 2.31876 0.163486 1436000200071 17.281 2.09547 0.158468 1436000200072 17.581 2.02521 0.17595 1436000200073 17.881 1.93519 0.186092 1436000200074 18.181 1.45249 0.17168 1436000200075 18.481 1.78637 0.2291 1436000200076 18.781 1.98852 0.298124 1436000200077 ENDDATA 64 0 1436000200078 ENDSUBENT 77 0 1436000299999 ENDENTRY 2 0 1436099999999