ENTRY 20462 20131120 22382046200000001 SUBENT 20462001 20131120 22382046200100001 BIB 13 42 2046200100002 INSTITUTE (2UK HAR) 2046200100003 REFERENCE (J,JNE,24,323,197010) 2046200100004 (C,70HELSINKI,1,161,197006) Same as above.No data given2046200100005 (R,AERE-R-6316,197003) Same as JNE,24,323,1970. 2046200100006 AUTHOR (M.G.Sowerby, B.H.Patrick, C.A.Uttley, K.M.Diment) 2046200100007 TITLE The ratio of the 3-Li-6(n,alpha) to 5-B-10(n,alpha) 2046200100008 cross-sections from 10 eV to 80 keV and recommended 2046200100009 values of the 5-B-10(n,alpha) cross-section 2046200100010 FACILITY (LINAC,2UK HAR) 45 MeV Harwell Linear Accelerator 2046200100011 time-of-flight spectrometer. 2046200100012 INC-SOURCE (PHOTO) Neutron pulse width (unmoderated) = 220 ns. 2046200100013 ADD-RES The B(n,alpha) cross-section has been written in terms 2046200100014 of an analytical expression, the form of which has 2046200100015 been derived from theoretical arguments. This 2046200100016 expression has been fitted to all the cross-section 2046200100017 data and the result is given by equation. It was 2046200100018 concluded that equation describes the 10B(n,alpha) 2046200100019 cross-section up to 200 keV within an accuracy ranging2046200100020 from 1% up to 1 keV, 2% at 10 keV, 3% at 100 keV and 2046200100021 5% at 200 keV and it is recommended that this equation2046200100022 be used where neutron fluxes are determined with 2046200100023 detectors based on the 10B(n,alpha) reaction. 2046200100024 SAMPLE The 10B sample had a total mass of 3.38 g and was 2046200100025 7.6 cm in diameter. 2046200100026 PART-DET (A) Alphas 2046200100027 COMMENT The numbers given in the quantity column are 2046200100028 ratios of average cross sections, averaged 2046200100029 over an energy range (E - E+0.15*E). The value 2046200100030 in the energy column represents the average energy of 2046200100031 the range, i.e. (E+0.075*E). 2046200100032 .Two measurements covering the ranges 10 eV- 2 keV 2046200100033 and 50 eV- 80 keV respectively have been performed. 2046200100034 FLAG (1.) The results are affected by the resonances in 2046200100035 the detector structural materials. 2046200100036 STATUS (TABLE) Data from table 5, page 327 of the Journal of 2046200100037 Nuclear Energy, v.24, p.323, 1970 2046200100038 HISTORY (19700128C) 2046200100039 (19710115A) Comments adapted. 2046200100040 (19760112E) 2046200100041 (20131120A) SD:Updated to new date formats,lower case. 2046200100042 Corrected according to last EXFOR rules and Dict. 2046200100043 REACTION code was changed in Subents 002,003. 2046200100044 ENDBIB 42 0 2046200100045 NOCOMMON 0 0 2046200100046 ENDSUBENT 45 0 2046200199999 SUBENT 20462002 20131120 22382046200200001 BIB 7 25 2046200200002 REACTION ((3-LI-6(N,T)2-HE-4,,SIG)/(5-B-10(N,A)3-LI-7,,SIG)) 2046200200003 METHOD (TOF) Flight path length = 34.9 m with resolution 2046200200004 of 7.2 ns/m for lithium glass detector and 35.97 m 2046200200005 with resolution of 7.0 ns/m for B10-F(3) detector. 2046200200006 MONITOR ((3-LI-6(N,T)2-HE-4,,SIG)/(5-B-10(N,A)3-LI-7,,SIG)) 2046200200007 .Low energy experiment normalized to a value of 0.2450 2046200200008 in the energy range 10-20 eV. 2046200200009 DETECTOR (SCIN ) 1/8 inch thick lithium glass detector (NE905).2046200200010 (PROPC) B10-F(3) proportional counter of 2046200200011 2 inches diameter. 2046200200012 COMMENT From the lower energy experiment. 2046200200013 ERR-ANALYS (ERR-T) Total uncertainty includes: 2046200200014 (MONIT-ERR) The error in the normalizing value 2046200200015 By normalizing the experiments the magnitudes of the 2046200200016 systematic errors are reduced in the vicinity of the 2046200200017 normalizing regions. 2046200200018 (ERR-1,0.,0.8) Error due to background uncertainties 2046200200019 (ERR-2,0.,0.5) Error due to BF3 counter efficiency 2046200200020 (ERR-3,0.,0.82) Error due to Li glass efficiency 2046200200021 (ERR-S) Statistical error 2046200200022 HISTORY (19710115A) Comments adapted. 2046200200023 (20131116A) SD: REACTION code was changed according to 2046200200024 MEMO CP-D/774 (SF3 and SF4 were swapped, reaction 2046200200025 was 6Li(n,t+alpha). Information to BIB section was 2046200200026 added. COMMON and ERR-ANALYS were added. 2046200200027 ENDBIB 25 0 2046200200028 COMMON 6 3 2046200200029 EN-NRM-MIN EN-NRM-MAX MONIT MONIT-ERR EN-RSL ERR-S 2046200200030 MEV MEV NO-DIM PER-CENT PER-CENT PER-CENT 2046200200031 1.0000E-05 2.0000E-05 0.2450 0.6 7.5 0.6 2046200200032 ENDCOMMON 3 0 2046200200033 DATA 4 36 2046200200034 EN DATA ERR-T FLAG 2046200200035 MEV NO-DIM NO-DIM NO-DIM 2046200200036 1.0000E-05 2.4400E-01 2.2000E-03 2046200200037 1.1400E-05 2.4610E-01 2.2000E-03 2046200200038 1.3200E-05 2.4780E-01 2.2000E-03 2046200200039 1.5100E-05 2.4550E-01 2.2000E-03 2046200200040 1.7400E-05 2.4560E-01 2.3000E-03 2046200200041 2.0000E-05 2.4510E-01 2.3000E-03 2046200200042 2.3000E-05 2.4380E-01 2.3000E-03 2046200200043 2.6000E-05 2.4410E-01 2.4000E-03 2046200200044 3.0000E-05 2.4460E-01 2.4000E-03 2046200200045 3.5000E-05 2.4360E-01 2.5000E-03 2046200200046 4.0000E-05 2.4490E-01 2.6000E-03 2046200200047 4.6000E-05 2.4390E-01 2.6000E-03 2046200200048 5.3000E-05 2.4100E-01 2.6000E-03 2046200200049 6.1000E-05 2.4520E-01 2.7000E-03 2046200200050 7.0000E-05 2.4220E-01 2.7000E-03 2046200200051 8.1000E-05 2.4380E-01 2.8000E-03 2046200200052 9.3000E-05 2.4330E-01 2.9000E-03 2046200200053 1.0700E-04 2.4120E-01 2.9000E-03 2046200200054 1.2300E-04 2.4320E-01 3.0000E-03 2046200200055 1.4200E-04 2.4210E-01 3.2000E-03 2046200200056 1.6300E-04 2.4330E-01 3.2000E-03 2046200200057 1.8700E-04 2.4450E-01 3.3000E-03 2046200200058 2.1500E-04 2.4480E-01 3.3000E-03 2046200200059 2.4800E-04 2.4200E-01 3.4000E-03 2046200200060 2.8500E-04 2.4320E-01 3.4000E-03 2046200200061 3.2800E-04 2.4460E-01 3.4000E-03 2046200200062 3.7700E-04 2.4240E-01 3.5000E-03 2046200200063 4.3300E-04 2.4250E-01 3.5000E-03 2046200200064 4.9800E-04 2.4480E-01 3.6000E-03 2046200200065 5.7300E-04 2.5530E-01 1.0000E+00 2046200200066 6.5900E-04 2.4360E-01 3.5000E-03 2046200200067 7.5800E-04 2.4480E-01 3.5000E-03 2046200200068 8.7100E-04 2.4640E-01 3.7000E-03 2046200200069 1.0020E-03 2.5000E-01 3.7000E-03 2046200200070 1.1520E-03 2.4540E-01 3.7000E-03 2046200200071 1.3250E-03 2.5260E-01 1.0000E+00 2046200200072 ENDDATA 38 0 2046200200073 ENDSUBENT 72 0 2046200299999 SUBENT 20462003 20131120 22382046200300001 BIB 7 24 2046200300002 REACTION ((3-LI-6(N,T)2-HE-4,,SIG)/(5-B-10(N,A)3-LI-7,,SIG)) 2046200300003 METHOD (TOF) Flight path length = 97.55 m with a 2046200300004 resolution of 2.5 ns/m. 2046200300005 DETECTOR (SCIN) 1/8 inch thick lithium glass detector (NE905). 2046200300006 (NAICR) 'Boron plug' detector, which consists of an 2046200300007 array of NaI crystals which detect the 478 keV gamma- 2046200300008 rays from the 10B(n,alpha1+gamma) reaction produced 2046200300009 in a sample of 10B in the neutron beam. 2046200300010 COMMENT From the higher energy experiment. 2046200300011 ERR-ANALYS (ERR-T) Total uncertainty includes: 2046200300012 (ERR-4) Normalization uncertainty. The high energy 2046200300013 experiment was normalized to the low energy one 2046200300014 in the region of 1 keV. 2046200300015 (ERR-1,0.,1.5) Error due to background uncertainties 2046200300016 (ERR-2,0.,1.44) Error due to 'Boron Plug' Efficiency 2046200300017 (ERR-3,0.,0.3) Error due to Li glass efficiency 2046200300018 (ERR-S) Statistical error 2046200300019 STATUS (DEP,20462002) The high energy experiment was 2046200300020 normalized to the low energy one. 2046200300021 HISTORY (19710115A) Comments adapted. 2046200300022 (20131120A) SD: REACTION code was changed according to 2046200300023 MEMO CP-D/774 (SF3 and SF4 were swapped, reaction 2046200300024 was 6Li(n,t+alpha). Information to BIB section was 2046200300025 added. COMMON and ERR-ANALYS were added. 2046200300026 ENDBIB 24 0 2046200300027 COMMON 4 3 2046200300028 EN-NRM ERR-4 EN-RSL ERR-S 2046200300029 MEV PER-CENT PER-CENT PER-CENT 2046200300030 1.0000E-03 1. 7.5 0.5 2046200300031 ENDCOMMON 3 0 2046200300032 DATA 4 50 2046200300033 EN DATA ERR-T FLAG 2046200300034 MEV NO-DIM NO-DIM NO-DIM 2046200300035 5.2000E-05 2.4690E-01 5.3000E-03 2046200300036 5.9000E-05 2.4260E-01 5.0000E-03 2046200300037 6.8000E-05 2.4550E-01 4.7000E-03 2046200300038 7.8000E-05 2.4580E-01 4.4000E-03 2046200300039 9.0000E-05 2.4450E-01 4.2000E-03 2046200300040 1.0400E-04 2.4530E-01 4.0000E-03 2046200300041 1.1900E-04 2.4460E-01 3.9000E-03 2046200300042 1.3700E-04 2.4510E-01 3.9000E-03 2046200300043 1.5800E-04 2.4330E-01 3.8000E-03 2046200300044 1.8200E-04 2.4600E-01 3.8000E-03 2046200300045 2.0900E-04 2.4490E-01 3.7000E-03 2046200300046 2.4000E-04 2.4530E-01 3.5000E-03 2046200300047 2.7600E-04 2.4560E-01 3.4000E-03 2046200300048 3.1700E-04 2.4530E-01 3.4000E-03 2046200300049 3.6500E-04 2.4530E-01 3.3000E-03 2046200300050 4.2000E-04 2.4380E-01 3.3000E-03 2046200300051 4.8300E-04 2.4540E-01 3.2000E-03 2046200300052 5.5500E-04 2.4540E-01 3.1000E-03 2046200300053 6.3900E-04 2.4680E-01 3.1000E-03 2046200300054 7.3400E-04 2.4750E-01 3.0000E-03 2046200300055 8.4500E-04 2.4650E-01 2.8000E-03 2046200300056 9.7100E-04 2.4680E-01 2.7000E-03 2046200300057 1.1200E-03 2.4810E-01 2.7000E-03 2046200300058 1.2800E-03 2.5200E-01 1.0000E+00 2046200300059 1.4800E-03 2.4800E-01 2.8000E-03 2046200300060 1.7000E-03 2.4750E-01 2.8000E-03 2046200300061 1.9500E-03 2.4980E-01 3.0000E-03 2046200300062 2.2500E-03 2.5010E-01 3.0000E-03 2046200300063 2.5800E-03 2.5360E-01 1.0000E+00 2046200300064 2.9700E-03 2.5390E-01 1.0000E+00 2046200300065 3.4200E-03 2.5040E-01 3.0000E-03 2046200300066 3.9300E-03 2.5180E-01 3.0000E-03 2046200300067 4.5200E-03 2.5430E-01 3.0000E-03 2046200300068 5.2000E-03 2.5320E-01 3.0000E-03 2046200300069 5.9800E-03 2.5420E-01 3.0000E-03 2046200300070 6.8700E-03 2.5270E-01 3.0000E-03 2046200300071 7.9000E-03 2.5420E-01 3.0000E-03 2046200300072 9.0900E-03 2.5350E-01 3.0000E-03 2046200300073 1.0500E-02 2.5630E-01 3.1000E-03 2046200300074 1.2000E-02 2.5550E-01 3.1000E-03 2046200300075 1.3800E-02 2.5590E-01 3.1000E-03 2046200300076 1.5900E-02 2.5890E-01 3.1000E-03 2046200300077 1.8300E-02 2.5630E-01 3.1000E-03 2046200300078 2.1000E-02 2.5910E-01 3.1000E-03 2046200300079 2.4200E-02 2.5930E-01 3.1000E-03 2046200300080 2.7800E-02 2.6170E-01 3.1000E-03 2046200300081 3.2000E-02 2.6060E-01 3.1000E-03 2046200300082 5.6000E-02 2.7940E-01 6.7000E-03 2046200300083 6.4000E-02 2.8290E-01 6.8000E-03 2046200300084 7.4000E-02 2.8830E-01 6.9000E-03 2046200300085 ENDDATA 52 0 2046200300086 ENDSUBENT 85 0 2046200399999 ENDENTRY 3 0 2046299999999