ENTRY 20430 20161206 22552043000000001 SUBENT 20430001 20161206 22552043000100001 BIB 11 31 2043000100002 INSTITUTE (2ZZZGEL) 2043000100003 REFERENCE (C,75WASH,2,733,197503) 2043000100004 AUTHOR (F.Corvi, G.Rohr, H.Weigmann) 2043000100005 TITLE -P-wave assignment of U-238 neutron resonances.- 2043000100006 FACILITY (LINAC,2ZZZGEL) Linear accelerator at Geel. 2043000100007 SAMPLE .For measuring gammas above 4.3 and 1.5 MeV two runs 2043000100008 made: one with 13.9 g/cm**2 U-238 plate (0.4 % 2043000100009 U-235) of size 10x10 cm and inclined 45 degree to 2043000100010 n-beam, the second with 4.64 g/cm**2 U-238 disc 2043000100011 (0.2 % U-235) 12 cm diam. placed perpendicular to 2043000100012 n-beam. 2043000100013 .Capture cross-sections measured with 2.5 g/cm**2 2043000100014 U-238(0.2 % U-235) 2043000100015 METHOD (TOF) 50 m flight path. 2043000100016 DETECTOR (NAICR) Two 7 x 6 inch NaI(Tl) detectors for measuring 2043000100017 gammas above 4.3 and 1.5 MeV. 2043000100018 Resolution 8.5% at 137-Cs line. 2043000100019 (SCIN) Liquid scintillator. 2043000100020 .C(6)-F(6) capture gamma-ray detectors applying 2043000100021 Maier-Leibnitz weighting method to obtain 2043000100022 independence of the capture gamma-ray cascade. 2043000100023 PART-DET (G) Gamma-rays. 2043000100024 COMMENT .New method for determining p-wave assignment of U-238 2043000100025 resonances presented consisting of measuring the 2043000100026 fraction of capture gamma-rays above 4.3 MeV. 2043000100027 HISTORY (19750308C) 2043000100028 (19750925E) 2043000100029 (20161206A) M.M. Rel.ref. R,INDC(NDS)-0129,151,1981 was2043000100030 added. BIB information was updated. 2043000100031 Upper -> lower case correction. 2043000100032 Dates were corrected for 4-digits year. 2043000100033 ENDBIB 31 0 2043000100034 NOCOMMON 0 0 2043000100035 ENDSUBENT 34 0 2043000199999 SUBENT 20430002 20161206 22552043000200001 BIB 8 39 2043000200002 REACTION 1(92-U-238(N,0),,EN) 2043000200003 2(92-U-238(N,EL),,WID/RED,,G) 2043000200004 REL-REF (C,23333002,M.S.Moore+,R,INDC(NDS)-0129,151,1981) 2043000200005 In this rel.ref. some of resonances assigned as p-wave2043000200006 in this experiment were not confirmed: 2043000200007 63.51, 977.36, 1252.0, 1332.0, 1387.1, 1550.6 eV. 2043000200008 (R,,,R,BNL-325,1973) Vol.I 2043000200009 (A,10274001,F.Rahn+,J,PR/C,6,1854,1972) 2043000200010 Agree for resonances with Gn > 0.5meV 2043000200011 (A,20505001,G.Carraro+,C,71KNOX,1,701,1971) 2043000200012 Agree for resonances with Gn > 0.5meV 2043000200013 (D,10274001,F.Rahn+,J,PR/C,6,1854,1972) 2043000200014 For smaller resonances - measured values > than that 2043000200015 of F.Rahn+. 2043000200016 MISC-COL (MISC) Ratio R, defined as R=A(4.3)/A(1.5) where 2043000200017 A(4.3) and A(1.5) are resonance areas at the high 2043000200018 energy run ( threshold 4.3 MeV) and at the calibration 2043000200019 run ( threshold 1.5 MeV), respectively. 2043000200020 ANALYSIS (AREA) Area analysis. Program with Monte Carlo 2043000200021 subroutine used for correcting multiple scattering 2043000200022 contribution to area of resonance. 2043000200023 Re-normalization factor was applied to the data such 2043000200024 that the exp. areas for 14 strong s-wave resonances 2043000200025 in the range 100-1700 eV are in agreement with the 2043000200026 capture areas calculated with area analysis code from 2043000200027 known resonance parameters of BNL-325,1973; 2043000200028 the effective scattering radius 8.74 Fm was used. 2043000200029 - R-values were divided into two groups: 2043000200030 1) g*Gn/sqrt(En) > 0.15 meV 2043000200031 2) gGn/sqrt(En) < 0.15 meV. 2043000200032 It was assumed that first group contains only s-wave 2043000200033 resonances, while the 2nd group contains mostly p-wave 2043000200034 but also a small number of s-wave resonances. 2043000200035 ASSUMED (ASSUM,92-U-238(N,EL)92-U-238,,RAD) 2043000200036 ERR-ANALYS (DATA-ERR) Error given. No other details. 2043000200037 STATUS (TABLE) Table 1 of C,75WASH,2,733,1975 2043000200038 HISTORY (19750308C) 2043000200039 (19750925E) 2043000200040 (20161206A) M.M. MISC,REL-REFs,ASSUM were added 2043000200041 ENDBIB 39 0 2043000200042 COMMON 2 3 2043000200043 MOMENTUM L ASSUM 2043000200044 NO-DIM FERMI 2043000200045 1. 8.74 2043000200046 ENDCOMMON 3 0 2043000200047 DATA 6 57 2043000200048 DATA 1DATA-ERR 1DATA 2DATA-ERR 2MISC MISC-ERR 2043000200049 EV EV MILLI-EV MILLI-EV NO-DIM NO-DIM 2043000200050 6.3510E+01 1.0000E-01 3.7000E+00 7.0000E-01 0.10 0.02 2043000200051 8.3670E+01 1.0000E-01 3.8000E+00 6.0000E-01 0.32 0.03 2043000200052 8.9250E+01 1.0000E-01 3.1700E+01 2.6000E+00 0.106 0.003 2043000200053 1.2497E+02 1.2000E-01 4.5000E+00 6.0000E-01 0.12 0.02 2043000200054 2.0073E+02 1.0000E-01 4.8000E+00 7.0000E-01 0.090 0.020 2043000200055 2.0310E+02 1.0000E-01 2.6000E+00 6.0000E-01 0.085 0.028 2043000200056 2.1490E+02 1.0000E-01 3.9000E+00 6.0000E-01 0.28 0.03 2043000200057 2.1842E+02 1.0000E-01 2.4000E+00 8.0000E-01 0.14 0.04 2043000200058 2.4275E+02 1.0000E-01 1.2600E+01 1.1000E+00 0.18 0.01 2043000200059 2.5393E+02 1.0000E-01 8.3000E+00 1.1000E+00 0.25 0.01 2043000200060 2.6400E+02 1.0000E-01 1.7300E+01 1.5000E+00 0.11 0.01 2043000200061 2.7520E+02 2.0000E-01 8.3000E+00 2.4000E+00 0.061 0.004 2043000200062 2.8255E+02 1.5000E-01 6.0000E+00 1.0000E+00 0.26 0.02 2043000200063 3.3740E+02 2.0000E-01 5.0000E+00 1.0000E+00 0.16 0.03 2043000200064 3.5190E+02 2.0000E-01 1.0200E+01 1.2000E+00 0.29 0.02 2043000200065 3.7300E+02 3.0000E-01 1.5000E+00 5.0000E-01 0.15 0.08 2043000200066 4.3990E+02 2.0000E-01 9.4000E+00 9.0000E-01 0.15 0.01 2043000200067 4.9910E+02 3.0000E-01 2.1000E+00 8.0000E-01 0.31 0.08 2043000200068 5.2350E+02 2.0000E-01 6.3000E+00 9.0000E-01 0.18 0.02 2043000200069 5.4250E+02 1.4000E-01 2.1000E+00 6.0000E-01 0.14 0.03 2043000200070 5.5110E+02 4.0000E-01 1.5000E+00 5.0000E-01 0.16 0.09 2043000200071 5.5640E+02 3.0000E-01 1.8300E+01 1.4000E+00 0.07 0.01 2043000200072 6.1600E+02 3.0000E-01 2.8000E+00 6.0000E-01 0.11 0.05 2043000200073 6.2445E+02 2.0000E-01 1.4900E+01 1.2000E+00 0.064 0.006 2043000200074 6.6880E+02 3.0000E-01 3.3000E+00 6.0000E-01 0.16 0.05 2043000200075 6.7800E+02 2.0000E-01 1.1800E+01 1.5000E+00 0.14 0.02 2043000200076 6.9840E+02 3.0000E-01 4.7000E+00 1.0000E+00 0.15 0.04 2043000200077 7.1080E+02 4.0000E-01 1.7100E+01 2.9000E+00 0.16 0.02 2043000200078 7.1400E+02 3.0000E-01 4.3000E+00 9.0000E-01 0.23 0.04 2043000200079 7.3280E+02 2.0000E-01 3.1400E+01 2.7000E+00 0.105 0.006 2043000200080 7.7960E+02 3.0000E-01 2.7300E+01 2.5000E+00 0.074 0.006 2043000200081 7.8750E+02 4.0000E-01 9.4000E+00 1.0000E+00 0.16 0.002 2043000200082 8.2890E+02 4.0000E-01 1.8000E+00 6.0000E-01 0.12 0.04 2043000200083 9.6470E+02 4.0000E-01 2.9000E+00 7.0000E-01 0.08 0.02 2043000200084 9.7760E+02 4.0000E-01 7.2000E+00 1.0000E+00 0.09 0.02 2043000200085 1.0295E+03 3.0000E-01 1.9200E+01 1.7000E+00 0.12 0.01 2043000200086 1.0474E+03 4.0000E-01 3.4000E+00 8.0000E-01 0.17 0.06 2043000200087 1.0681E+03 4.0000E-01 7.4000E+00 1.6000E+00 0.16 0.01 2043000200088 1.0746E+03 4.0000E-01 7.2000E+00 1.1000E+00 0.10 0.02 2043000200089 1.0822E+03 3.0000E-01 1.2500E+01 1.4000E+00 0.09 0.01 2043000200090 1.0956E+03 4.0000E-01 1.7900E+01 2.2000E+00 0.17 0.02 2043000200091 1.1033E+03 3.0000E-01 1.9200E+01 2.2000E+00 0.12 0.02 2043000200092 1.1319E+03 2.0000E-01 3.2700E+01 3.6000E+00 0.09 0.01 2043000200093 1.1529E+03 6.0000E-01 3.9000E+00 1.2000E+00 0.63 0.10 2043000200094 1.1556E+03 3.0000E-01 6.3000E+00 1.4000E+00 0.25 0.09 2043000200095 1.2203E+03 3.0000E-01 4.1000E+00 1.0000E+00 0.28 0.06 2043000200096 1.2305E+03 4.0000E-01 2.5000E+00 1.0000E+00 0.10 0.03 2043000200097 1.2520E+03 3.0000E-01 4.0000E+00 6.0000E-01 0.09 0.03 2043000200098 1.2774E+03 4.0000E-01 2.7000E+00 1.8000E+00 0.24 0.05 2043000200099 1.3177E+03 3.0000E-01 2.9600E+01 3.0000E+00 0.35 0.01 2043000200100 1.3320E+03 3.0000E-01 7.8000E+00 1.4000E+00 0.10 0.02 2043000200101 1.3871E+03 4.0000E-01 3.0000E+00 6.0000E-01 0.13 0.05 2043000200102 1.4175E+03 6.0000E-01 2.0300E+01 4.1000E+00 0.10 0.02 2043000200103 1.4484E+03 6.0000E-01 7.9000E+00 1.5000E+00 0.14 0.03 2043000200104 1.5112E+03 5.0000E-01 5.3000E+00 9.0000E-01 0.13 0.04 2043000200105 1.5356E+03 4.0000E-01 3.4000E+00 7.0000E-01 0.16 0.05 2043000200106 1.5480E+03 5.0000E-01 1.9100E+01 2.2000E+00 0.07 0.01 2043000200107 ENDDATA 59 0 2043000200108 ENDSUBENT 107 0 2043000299999 SUBENT 20430003 20161206 22552043000300001 BIB 5 8 2043000300002 REACTION (92-U-238(N,EL),,WID,,G/AV) 2043000300003 ANALYSIS Porter-Thomas distribution was used for fitting. 2043000300004 63 resonances with g*Gn1 > 2 meV were used. 2043000300005 ERR-ANALYS (DATA-ERR) Error given. No other details. 2043000300006 STATUS (TABLE) Text, page 736 of C,75WASH,2,733,1975 2043000300007 HISTORY (19750308C) 2043000300008 (19750925E) 2043000300009 (20161206A) ANALYSIS was added 2043000300010 ENDBIB 8 0 2043000300011 COMMON 1 3 2043000300012 MOMENTUM L 2043000300013 NO-DIM 2043000300014 1. 2043000300015 ENDCOMMON 3 0 2043000300016 DATA 5 1 2043000300017 EN-MAX EN-MIN DATA +DATA-ERR -DATA-ERR 2043000300018 EV EV MILLI-EV MILLI-EV MILLI-EV 2043000300019 1.5500E+03 6.3500E+01 5.42 1.11 0.86 2043000300020 ENDDATA 3 0 2043000300021 ENDSUBENT 20 0 2043000399999 SUBENT 20430004 20161206 22552043000400001 BIB 6 15 2043000400002 REACTION (92-U-238(N,EL),,STF) S0 2043000400003 REL-REF (R,20505001,G.Carraro+,C,71KNOX,1,701,1971) 2043000400004 (N,,H.I.Liou+,J,PR/C,6,435,1972) 2043000400005 Error determination method 2043000400006 ANALYSIS Data from this experiment for Gn< 10 meV and data of 2043000400007 G.Carraro+ for Gn> 10 meV were used in analysis. 2043000400008 ERR-ANALYS (DATA-ERR) Errors were determined according to H.Liou+ 2043000400009 STATUS (TABLE) Text, page 736 of C,75WASH,2,733,1975 2043000400010 HISTORY (19750308C) 2043000400011 (19750925E) 2043000400012 (20161206A) ANALYSIS,REL-REFs, ERR-ANALYS were added . 2043000400013 EN-MAX/MIN -> EN-RES-MAX/MIN , values corrected: 2043000400014 1550 -> 1600. , 63.5 -> 0. ( as mentioned in the 2043000400015 article page 736 the resonances in the range 0-1600 eV2043000400016 were used in analysis. 2043000400017 ENDBIB 15 0 2043000400018 COMMON 1 3 2043000400019 MOMENTUM L 2043000400020 NO-DIM 2043000400021 0. 2043000400022 ENDCOMMON 3 0 2043000400023 DATA 5 1 2043000400024 EN-RES-MAX EN-RES-MIN DATA +DATA-ERR -DATA-ERR 2043000400025 EV EV NO-DIM NO-DIM NO-DIM 2043000400026 1600. 0. 1.0 E-04 1.9 E-05 1.5 E-05 2043000400027 ENDDATA 3 0 2043000400028 ENDSUBENT 27 0 2043000499999 SUBENT 20430005 20161206 22552043000500001 BIB 6 25 2043000500002 REACTION (92-U-238(N,EL),,STF) S1 2043000500003 ANALYSIS Average value was obtained from two independent 2043000500004 estimates: 2043000500005 - (2.42 +0.5 -0.86) *10**-4 2043000500006 assuming that p-wave level spacing D1 is 1/3 of the 2043000500007 s-wave spacing. 2043000500008 - (2.16 +0.5 -0.4) *10**-4 2043000500009 influence of the effects which reduce the number of 2043000500010 assigned p-wave resonances was estimated. 2043000500011 REL-REF (D,10274010,F.Rahn+,J,PR/C,6,1854,1972) 1.4E-4 2043000500012 (N,,H.I.Liou+,J,PR/C,6,435,1972) 2043000500013 Error determination method 2043000500014 ERR-ANALYS (DATA-ERR) Error given. 2043000500015 For 1st estimate the errors were determined according 2043000500016 to H.Liou+ . 2043000500017 STATUS (TABLE) Text, page 737 of C,75WASH,2,733,1975 2043000500018 (DEP,20430003) Average reduced width for p-wave 2043000500019 resonances . 2043000500020 HISTORY (19750308C) 2043000500021 (19750925E) 2043000500022 (20161206A) ANALYSIS,REL-REFs, ERR-ANALYS were added 2043000500023 EN-MAX/MIN -> EN-RES-MAX/MIN , values corrected: 2043000500024 1550 -> 1600. , 63.5 -> 10. ( as mentioned in the 2043000500025 article page 736 the resonances in the range 0-1600 eV2043000500026 were used in analysis. 2043000500027 ENDBIB 25 0 2043000500028 COMMON 1 3 2043000500029 MOMENTUM L 2043000500030 NO-DIM 2043000500031 1. 2043000500032 ENDCOMMON 3 0 2043000500033 DATA 5 1 2043000500034 EN-RES-MAX EN-RES-MIN DATA +DATA-ERR -DATA-ERR 2043000500035 EV EV NO-DIM NO-DIM NO-DIM 2043000500036 1550. 63.5 2.3 E-04 5. E-05 4. E-05 2043000500037 ENDDATA 3 0 2043000500038 ENDSUBENT 37 0 2043000599999 SUBENT 20430006 20161206 22552043000600001 BIB 5 12 2043000600002 REACTION (92-U-238(N,0),,D) D0 2043000600003 ANALYSIS Best fit was obtained for the part of g*Gn/sqrt(En) 2043000600004 distribution ( Fig.5 ) with Gn0 > 0.25meV. 2043000600005 ERR-ANALYS (DATA-ERR) Error given. No other details. 2043000600006 STATUS (TABLE) Text, page 736 of C,75WASH,2,733,1975 2043000600007 HISTORY (19750308C) 2043000600008 (19750925E) 2043000600009 (20161206A) ANALYSIS was added 2043000600010 EN-MAX/MIN -> EN-RES-MAX/MIN , values corrected: 2043000600011 1550 -> 1600. , 63.5 -> 0. ( as mentioned in the 2043000600012 article page 736 the resonances in the range 0-1600 eV2043000600013 were used in analysis. 2043000600014 ENDBIB 12 0 2043000600015 COMMON 1 3 2043000600016 MOMENTUM L 2043000600017 NO-DIM 2043000600018 0. 2043000600019 ENDCOMMON 3 0 2043000600020 DATA 4 1 2043000600021 EN-RES-MAX EN-RES-MIN DATA DATA-ERR 2043000600022 EV EV EV EV 2043000600023 1600. 0. 22.4 1.0 2043000600024 ENDDATA 3 0 2043000600025 ENDSUBENT 24 0 2043000699999 ENDENTRY 6 0 2043099999999