ENTRY 10988 20130523 13921098800000001 SUBENT 10988001 20130523 13921098800100001 BIB 14 44 1098800100002 TITLE Angular distribution of fission fragments from fast 1098800100003 fission of U-235 1098800100004 AUTHOR (S.T.Hsue,G.F.Knoll,J.Meadows) 1098800100005 REFERENCE (J,NSE,66,24,197804) 1098800100006 INSTITUTE (1USAANL,1USAMHG) 1098800100007 FACILITY (DYNAM,1USAANL) 1098800100008 INC-SOURCE (P-LI7) 1098800100009 DETECTOR (TRD) Polyester track detector. 1098800100010 SAMPLE (92-U-235,ENR=0.9986) A 235U target 99.86 percent 1098800100011 (isotopically pure) with a deposit thickness of 0.937 1098800100012 mg/cm2 backed by a 0.127-mm-thick platinum foil. 1098800100013 METHOD (EXTB,CHSEP) After the exposure, the polyester film 1098800100014 detector was etched in a solution of KOH. Fragment 1098800100015 tracks for angles of 1, 15, 30, 60, 75 and 90 were 1098800100016 counted. The experiments were carried out using 1098800100017 average neutron energies of 265, 770, and 964 keV, 1098800100018 corresponding to the median energies of 1098800100019 sodium-deuterium, lanthan-beryllium, and 1098800100020 sodium-beryllium photoneutron sources. 1098800100021 CORRECTION Data were corrected for: 1. solid angle; 2. 1098800100022 thermal-neutron fission; 3. For low-energy neutrons 1098800100023 in the 7Li(p,n)7Be reaction; 4. scattering; 1098800100024 ANALYSIS With s-wave neutron capture, the fission 1098800100025 angular distribution is expected to be isotropic. 1098800100026 Small deviations from isotropic yield were observed 1098800100027 in the thermal-neutron data. After normalization by 1098800100028 the thermal-neutron run, the corrected data for each 1098800100029 neutron energy were least-square fitted with the 1098800100030 expression W(theta) = 1 + A2 x cos2 theta, where A2 is 1098800100031 defined as the anisotropy factor. 1098800100032 ERR-ANALYS (ERR-T) The estimated error values are based on the 1098800100033 uncertainties in the corrections as well as from 1098800100034 counting statistics and an assumed possible 1098800100035 systematic error. 1098800100036 (ERR-1) 1.5 % for all corrections. 1098800100037 (ERR-2) 1.0 % systematic error in the normal counting 1098800100038 process. 1098800100039 STATUS Data from private communication J.W.Meadows 82/10/13 1098800100040 (APRVD) approved by J.W.Meadows, 82/11/17. 1098800100041 HISTORY (19821021C) 1098800100042 (20130523A) BP: Updated to new date formats,lower 1098800100043 case. corrections according last EXFOR rules and Dict. 1098800100044 Corrected subentries according to the NSE article data,1098800100045 digitized Fig. 2-4. 1098800100046 ENDBIB 44 0 1098800100047 COMMON 4 3 1098800100048 EN-RSL ANG-RSL ERR-1 ERR-2 1098800100049 MEV ADEG PER-CENT PER-CENT 1098800100050 0.035 6. 1.5 1.0 1098800100051 ENDCOMMON 3 0 1098800100052 ENDSUBENT 51 0 1098800199999 SUBENT 10988002 20130523 13921098800200001 BIB 3 4 1098800200002 REACTION (92-U-235(N,F),,DA,FF,COS/RSD) 1098800200003 STATUS (TABLE) Table I, page 26. 1098800200004 HISTORY (20130523A) Corrected data according to Table I and 1098800200005 Fig. 5 of the published NSE article. 1098800200006 ENDBIB 4 0 1098800200007 COMMON 1 3 1098800200008 NUMBER 1098800200009 NO-DIM 1098800200010 2. 1098800200011 ENDCOMMON 3 0 1098800200012 DATA 3 3 1098800200013 EN DATA ERR-T 1098800200014 MEV NO-DIM NO-DIM 1098800200015 0.265 -0.010 0.014 1098800200016 0.770 0.137 0.016 1098800200017 0.964 0.157 0.026 1098800200018 ENDDATA 5 0 1098800200019 ENDSUBENT 18 0 1098800299999 SUBENT 10988003 20130523 13921098800300001 BIB 2 2 1098800300002 REACTION (92-U-235(N,F),,DA,FF,RSD) 1098800300003 STATUS (CURVE) Fig. 2, page 26. 1098800300004 ENDBIB 2 0 1098800300005 COMMON 1 3 1098800300006 EN 1098800300007 KEV 1098800300008 265.0 1098800300009 ENDCOMMON 3 0 1098800300010 DATA 3 6 1098800300011 ANG DATA ERR-T 1098800300012 ADEG NO-DIM NO-DIM 1098800300013 1.000E+00 9.947E-01 1.283E-02 1098800300014 1.500E+01 9.692E-01 1.283E-02 1098800300015 3.000E+01 9.957E-01 1.283E-02 1098800300016 6.000E+01 9.916E-01 1.282E-02 1098800300017 7.500E+01 9.882E-01 1.211E-02 1098800300018 9.000E+01 1.000E+00 1.354E-02 1098800300019 ENDDATA 8 0 1098800300020 ENDSUBENT 19 0 1098800399999 SUBENT 10988004 20130523 13921098800400001 BIB 2 2 1098800400002 REACTION (92-U-235(N,F),,DA,FF,RSD) 1098800400003 STATUS (CURVE) Fig. 3, page 26. 1098800400004 ENDBIB 2 0 1098800400005 COMMON 1 3 1098800400006 EN 1098800400007 KEV 1098800400008 770.0 1098800400009 ENDCOMMON 3 0 1098800400010 DATA 3 6 1098800400011 ANG DATA ERR-T 1098800400012 ADEG NO-DIM NO-DIM 1098800400013 1.000E+00 1.123E+00 1.564E-02 1098800400014 1.500E+01 1.115E+00 1.493E-02 1098800400015 3.000E+01 1.091E+00 1.493E-02 1098800400016 6.000E+01 1.026E+00 1.422E-02 1098800400017 7.500E+01 1.007E+00 1.422E-02 1098800400018 9.000E+01 1.000E+00 1.422E-02 1098800400019 ENDDATA 8 0 1098800400020 ENDSUBENT 19 0 1098800499999 SUBENT 10988005 20130523 13921098800500001 BIB 2 2 1098800500002 REACTION (92-U-235(N,F),,DA,FF,RSD) 1098800500003 STATUS (CURVE) Fig. 4, page 26. 1098800500004 ENDBIB 2 0 1098800500005 COMMON 1 3 1098800500006 EN 1098800500007 KEV 1098800500008 964.0 1098800500009 ENDCOMMON 3 0 1098800500010 DATA 3 6 1098800500011 ANG DATA ERR-T 1098800500012 ADEG NO-DIM NO-DIM 1098800500013 1.000E+00 1.131E+00 1.769E-02 1098800500014 1.500E+01 1.148E+00 1.769E-02 1098800500015 3.000E+01 1.123E+00 1.769E-02 1098800500016 6.000E+01 1.058E+00 1.627E-02 1098800500017 7.500E+01 1.012E+00 1.627E-02 1098800500018 9.000E+01 1.000E+00 1.557E-02 1098800500019 ENDDATA 8 0 1098800500020 ENDSUBENT 19 0 1098800599999 ENDENTRY 5 0 1098899999999