ENTRY 21732 20060810 21782173200000001 SUBENT 21732001 20060810 21782173200100001 BIB 13 23 2173200100002 INSTITUTE (2UK HAR) A.E.R.E. HARWELL. 2173200100003 REFERENCE (J,JNE/AB,20,135,196602) REPORT AND TABLE. 2173200100004 AUTHOR (M.G.SOWERBY) 2173200100005 TITLE -THE B-10(N,A) BRANCHING RATIO -. 2173200100006 FACILITY (LINAC) HARWELL LINEAR ACCELERATOR. 2173200100007 INC-SOURCE (PHOTO) LINAC TARGET WITH BOOSTER. 2173200100008 SAMPLE .BORON TRI FLORIDE IN THE PROPORTIONAL COUNTER. 2173200100009 METHOD (TOF ) TIME OF FLIGHT, WITH 35 AND 52 METER FLIGHT 2173200100010 PATHS. 2173200100011 DETECTOR (BF3 ) B-10 F3 COUNTER, 2.5 CM DIAMETER, APPROXIMATEL 2173200100012 TWELVE CM LONG AND FILLED WITH ARGON AT 1 ATMOSPHERE 2173200100013 AND 10 CM OF BF3 ENRICHED TO 90 PERCENT IN B-10. 2173200100014 TO MINIMISE END AND WALL EFFECTS THE COUNTER WAS 2173200100015 MOUNTED WITH ITS AXIS PERPENDICULAR TO THE NEUTRON 2173200100016 BEAM, WHICH HAD A DIAMETER LESS THAN THE ACTIVE 2173200100017 LENGTH OF THE COUNTER. 2173200100018 CORRECTION .BACKGROUND EFFECTS WERE CHECKED WITH RESONANT NEUTRON 2173200100019 ABSORBERS, BUT NO EFFECT WAS SEEN. 2173200100020 ERR-ANALYS (ERR-T) NO DETAILS. 2173200100021 STATUS .TABLES 1 AND 2, PAGE 137, JNE/AB,20. 2173200100022 HISTORY (19810131C) 2173200100023 (19810213E) 2173200100024 (20060810A) DATE AND REFERENCE CODE corrected 2173200100025 ENDBIB 23 0 2173200100026 NOCOMMON 0 0 2173200100027 ENDSUBENT 26 0 2173200199999 SUBENT 21732002 20060810 21782173200200001 BIB 5 9 2173200200002 REACTION (5-B-10(N,A)3-LI-7,PAR,SIG,,AV/REL) 2173200200003 EN-SEC (E-LVL,3-LI-7) 2173200200004 AVERAGE BRANCHING RATIOS TO THE LI-7 GROUND STATE 2173200200005 DIVIDED BY THE CROSS SECTION TO THE LI-7 FIRST 2173200200006 EXCITED STATE AT 478 KEV. 2173200200007 COMMENT .MEASUREMENTS ON THE 35 METER FLIGHT PATH. 2173200200008 STATUS .TABLE 1. 2173200200009 HISTORY (19810131C) 2173200200010 (20060810U) SECONDARY ENERGY INTRODUCED 2173200200011 ENDBIB 9 0 2173200200012 COMMON 1 3 2173200200013 E-LVL 2173200200014 KEV 2173200200015 478. 2173200200016 ENDCOMMON 3 0 2173200200017 DATA 4 23 2173200200018 EN-MIN EN-MAX DATA ERR-T 2173200200019 KEV KEV ARB-UNITS ARB-UNITS 2173200200020 2.3000E-02 2.9000E-02 6.7700E-02 1.7000E-03 2173200200021 2.9000E-02 4.0000E-02 6.4500E-02 1.6000E-03 2173200200022 4.0000E-02 5.6000E-02 6.8100E-02 1.6000E-03 2173200200023 5.6000E-02 8.8000E-02 6.5400E-02 1.5000E-03 2173200200024 8.8000E-02 1.5200E-01 6.7000E-02 2.4000E-03 2173200200025 1.5200E-01 3.3000E-01 6.7200E-02 1.5000E-03 2173200200026 3.3000E-01 1.2000E+00 6.4100E-02 1.0000E-03 2173200200027 1.2000E+00 1.5000E+00 6.0600E-02 2.4000E-03 2173200200028 1.5000E+00 1.9000E+00 6.6200E-02 3.8000E-03 2173200200029 1.9000E+00 2.6000E+00 6.4000E-02 2.3000E-03 2173200200030 2.6000E+00 3.7000E+00 6.8400E-02 2.3000E-03 2173200200031 3.7000E+00 5.8000E+00 6.5600E-02 2.9000E-03 2173200200032 5.8000E+00 1.0200E+01 6.3200E-02 2.1000E-03 2173200200033 1.0200E+01 2.2000E+01 6.1100E-02 1.7000E-03 2173200200034 2.2000E+01 2.5000E+01 6.3800E-02 4.6000E-03 2173200200035 2.5000E+01 2.9000E+01 6.4100E-02 4.4000E-03 2173200200036 2.9000E+01 3.4000E+01 5.5100E-02 4.3000E-03 2173200200037 3.4000E+01 3.9000E+01 7.0300E-02 6.1000E-03 2173200200038 3.9000E+01 4.6000E+01 5.9100E-02 3.9000E-03 2173200200039 4.6000E+01 5.5000E+01 6.0700E-02 2.3000E-03 2173200200040 5.5000E+01 6.8000E+01 6.3600E-02 8.0000E-03 2173200200041 6.8000E+01 8.5000E+01 6.8000E-02 9.0000E-03 2173200200042 8.5000E+01 1.1000E+02 7.2700E-02 6.4000E-03 2173200200043 ENDDATA 25 0 2173200200044 ENDSUBENT 43 0 2173200299999 SUBENT 21732003 20060810 21782173200300001 BIB 6 16 2173200300002 REACTION (5-B-10(N,A)3-LI-7,PAR,SIG,,AV/REL) 2173200300003 AVERAGE BRANCHING RATIO IN ABSOLUTE UNITS FOR THE 2173200300004 RATIO OF THE CROSS SECTION TO THE LI-7 GROUND 2173200300005 STATE TO THE CROSS SECTION TO THE LI-7 FIRST 2173200300006 EXCITED STATE AT 478 KEV. 2173200300007 EN-SEC (E-LVL,3-LI-7) 2173200300008 COMMENT .MEASUREMENTS WITH THE 52 METER FLIGHT PATH. 2173200300009 CORRECTION .DATA AT HIGHER ENERGIES MAY BE AFFECTED BY THE 2173200300010 VARIATION OF THE COUNTER WALL EFFECT WITH ENERGY. 2173200300011 .THE DATA ARE NOT CORRECTED FOR ALPHA ANGULAR 2173200300012 DISTRIBUTION EFFECTS BECAUSE OF THE LACK OF ACCURATE 2173200300013 ANGULAR DISTRIBUTION DATA. 2173200300014 STATUS .TABLE 2. 2173200300015 HISTORY (19810131C) 2173200300016 (19810213E) 2173200300017 (20060810U) SECONDARY ENERGY INTRODUCED 2173200300018 ENDBIB 16 0 2173200300019 COMMON 1 3 2173200300020 E-LVL 2173200300021 KEV 2173200300022 478. 2173200300023 ENDCOMMON 3 0 2173200300024 DATA 4 19 2173200300025 EN-MIN EN-MAX DATA ERR-T 2173200300026 KEV KEV ARB-UNITS ARB-UNITS 2173200300027 7.1000E-02 9.6000E-02 6.5000E-02 3.0000E-03 2173200300028 3.8000E-01 8.7000E-01 6.3000E-02 3.0000E-03 2173200300029 8.7000E-01 3.5000E+00 6.7000E-02 3.0000E-03 2173200300030 8.9000E+00 1.1000E+01 6.7000E-02 9.0000E-03 2173200300031 1.1000E+01 1.3900E+01 7.2000E-02 8.0000E-03 2173200300032 1.3900E+01 1.8200E+01 7.2000E-02 6.0000E-03 2173200300033 1.8900E+01 2.4700E+01 6.9000E-02 5.0000E-03 2173200300034 2.4700E+01 3.6000E+01 6.7000E-02 8.0000E-03 2173200300035 3.6000E+01 5.6000E+01 6.5000E-02 7.0000E-03 2173200300036 5.6000E+01 6.3000E+01 6.8000E-02 1.0000E-02 2173200300037 6.3000E+01 7.3000E+01 7.3000E-02 1.2000E-02 2173200300038 8.4000E+01 9.9000E+01 8.2000E-02 1.6000E-02 2173200300039 9.9000E+01 1.1800E+02 8.0000E-02 1.0000E-02 2173200300040 1.1800E+02 1.4200E+02 8.8000E-02 1.9000E-02 2173200300041 1.4200E+02 1.7600E+02 1.1000E-01 1.4000E-02 2173200300042 1.7600E+02 2.2000E+02 1.2100E-01 1.0000E-02 2173200300043 2.2000E+02 2.9000E+02 1.5900E-01 1.1000E-02 2173200300044 2.9000E+02 3.9000E+02 1.9500E-01 1.2000E-02 2173200300045 3.9000E+02 5.7000E+02 2.9000E-01 1.1000E-02 2173200300046 ENDDATA 21 0 2173200300047 ENDSUBENT 46 0 2173200399999 ENDENTRY 3 0 2173299999999