ENTRY 20463 19840409 00002046300000001 SUBENT 20463001 19840409 00002046300100001 BIB 13 67 2046300100002 INSTITUTE (2UK HAR) 2046300100003 (2JPNJAE) HEAD AUTHOR'S PRESENT ADDRESS. 2046300100004 REFERENCE (J,JNE,24,85,7004) 2046300100005 ((R,AERE-R-5980,6904)=(P,EANDC(UK)-112,6904)) 2046300100006 SAME AS MAIN REFERENCE. 2046300100007 ASSOCIATED REFERENCES ARE 2046300100008 (P,EANDC(UK)-99,6804) PLOT OF PRELIMINARY RESULTS GIVEN2046300100009 (P,AERE-PR/NP-13,6802) PLOT OF PRELIMINARY DATA BETWEEN2046300100010 200 EV AND 80 KEV GIVEN. 2046300100011 (P,AERE-PR/NP-14,6810) PLOT GIVEN 1 - 100 KEV. 2046300100012 (P,AERE-PR/NP-15,6903) FINAL DATA GIVEN. 2046300100013 AUTHOR (A.ASAMI, M.C.MOXON) 2046300100014 TITLE -THE LOW ENERGY SCATTERING CROSS SECTION OF 5-B-10.- 2046300100015 FACILITY (LINAC) HARWELL ELECTRON LINEAR ACCELERATOR. 2046300100016 INC-SOURCE (PHOTO) PULSED NEUTRON. 2046300100017 SAMPLE .TWO SAMPLES OF B10 WERE USED, BOTH OF 3.5 CM 2046300100018 DIA. THE THICKNESSES WERE 2.737*E-2 ATOMS/BARN AND 2046300100019 6.086*E-2 ATOMS/BARN. 2046300100020 .B10 93.0 +- 0.2 PC, SI 0.8 PC, 2046300100021 B11 5.3 PC, C 0.7 PC, 2046300100022 OTHERS 0.2 PC. 2046300100023 METHOD (TOF ) FLIGHT PATH = 50 M. 2046300100024 DETECTOR (SCIN ) 8 LI6 GLASS SCINTILLATORS NE 905, 4.5 CM 2046300100025 DIA. AND 1.3 CM THICK. 2046300100026 THE EIGHT SCINTILLATORS MOUNTED ON EITHER SIDE OF TWO 2046300100027 ALUMINIUM PLATES. THESE PLATES WERE SET IN A VERTICAL 2046300100028 PLANE, IN LINE WITH THE NEUTRON BEAM, WITH ONE PLATE 2046300100029 FIXED ABOVE AND ONE BELOW THE NEUTRON BEAM TUBE, 2046300100030 MEASUREMENTS WERE CARRIED OUT AT ANGLES OF 39, 65, 2046300100031 120 AND 144 DEG TO THE INCIDENT NEUTRON BEAM. 2046300100032 COMMENT ERRORS OF THE TOTAL SCATTERING X-SECT. IN MB. 2046300100033 ------------------------------------------------------2046300100034 E0(KEV) 1. 10. 70. 2046300100035 ------------------------------------------------------2046300100036 STATISTICS 20. 15. 18. 2046300100037 BKG NORMALISATION 22. 17. 14. 2046300100038 DET. ANGLE 33. 12. 5. 2046300100039 SIGMA TOTAL OF B10 26. 12. 8. 2046300100040 MULTIPLE SCATTERING 63. 47. 37. 2046300100041 TOTAL 81. 55. 45. 2046300100042 ------------------------------------------------------2046300100043 .BELOW 5 KEV THE OBSERVED DIFFERENTIAL SCATTERING CROSS2046300100044 SECTIONS AT 4 ANGLES START DEVIATING FROM ONE ANOTHER 2046300100045 (AT MOST 9 PERC.). THIS IS MORE PROBABLY DUE TO 2046300100046 INACCURACIES IN THE CORRECTION APPLIED TO THE DATA 2046300100047 THAN TO THE EXISTENCE OF ANG.DEPENDENCE OF THE CROSS 2046300100048 SECTION. 2046300100049 .AVERAGED VALUE OF THE CROSS SECTION BETWEEN 0.92 TO 2046300100050 10.3 KEV IS 2.23 +- 0.06 B. AND USING THIS VALUE WITH 2046300100051 A LEAST SQURE FIT OF THE TOTAL CROSS SECTION BY 2046300100052 DIMENT, AERE-R-5224 (1967), THE CONSTANT DEVIATION 2046300100053 DELTA-SIGMA OF THE (N,A) CROSS SECTION FROM 1/V LAW 2046300100054 IS FOUND TO BE -0.28 +- 0.12 B. 2046300100055 HISTORY (690630L) 2046300100056 (710115T) 2046300100057 (760112E) 2046300100058 (840106U) A.P.T. JAPAN CODE CHANGED TO JPN 2046300100059 (840106E) 2046300100060 CORRECTION MADE FOR IMPURITIES, HOLDER, DETECTOR SIZE, EFFICIENCY2046300100061 MULTIPLE SCATTERING. MAGNITUDES OF CORRECTIONS GIVEN.2046300100062 ERR-ANALYS THE INDICATED ERRORS ARE A COMBINATION OF COUNTING 2046300100063 STATISTICS, BACKGROUND NORMALISATION, ANGULAR 2046300100064 UNCERTAINTY OF THE DETECTOR, THE TOTAL CROSS SECTION 2046300100065 OF B10 (+- 2 PC) AND MULTIPLE SCATTERING (+- 30 PC OF 2046300100066 CORRECTION), WHILE CONTRIBUTION FROM THE UNCERTAINTIES2046300100067 IN THE TOTAL CROSS SECTIONS OF OTHER COMPONENTS IN THE2046300100068 SAMPLES ARE NEGLIGIBLE. SEE COMMENT. 2046300100069 ENDBIB 67 0 2046300100070 NOCOMMON 0 0 2046300100071 ENDSUBENT 70 0 2046300199999 SUBENT 20463002 19840120 00002046300200001 BIB 5 9 2046300200002 REACTION (5-B-10(N,EL)5-B-10,,SIG) 2046300200003 MONITOR (6-C-0(N,EL)6-C-0,,SIG) 2046300200004 BY UTTLEY, DIMENT, AERE-PR/NP-13,(1968)P4. 2046300200005 REACTOR GRADE GRAPHITE WITH THE SAME DIAMETER (3.5 CM)2046300200006 PART-DET (N ) 2046300200007 STATUS DATA FROM TABLE 6, PAGE 93 OF JNE 24,85. 2046300200008 HISTORY (690630L) 2046300200009 (710115T) 2046300200010 (760112E) 2046300200011 ENDBIB 9 0 2046300200012 NOCOMMON 0 0 2046300200013 DATA 4 30 2046300200014 EN EN-RSL DATA DATA-ERR 2046300200015 MEV MEV B B 2046300200016 4.7000E-04 7.5000E-05 2.0630E+00 8.8810E-02 2046300200017 7.0000E-04 1.4000E-04 2.1080E+00 8.8230E-01 2046300200018 9.1500E-04 5.0000E-05 2.1550E+00 8.2380E-02 2046300200019 1.0400E-03 6.0000E-05 2.1690E+00 8.1030E-02 2046300200020 1.1950E-03 8.0000E-05 2.1700E+00 7.8330E-02 2046300200021 1.3850E-03 1.0000E-04 2.1530E+00 7.5980E-02 2046300200022 1.6250E-03 1.2000E-04 2.1630E+00 7.5150E-02 2046300200023 1.9350E-03 1.5000E-04 2.2030E+00 7.7780E-02 2046300200024 3.8700E-03 2.5000E-04 2.1910E+00 7.8580E-02 2046300200025 4.4200E-03 3.0000E-04 2.2360E+00 6.8170E-02 2046300200026 5.1000E-03 3.5000E-04 2.2030E+00 6.3430E-02 2046300200027 5.9400E-03 4.0000E-04 2.2640E+00 6.6870E-02 2046300200028 7.0100E-03 5.0000E-04 2.2590E+00 6.0260E-02 2046300200029 8.4000E-03 7.0000E-04 2.2370E+00 5.7890E-02 2046300200030 1.0250E-02 1.0000E-03 2.2300E+00 5.5260E-02 2046300200031 1.2020E-02 6.0000E-04 2.2480E+00 5.5900E-02 2046300200032 1.3500E-02 7.0000E-04 2.2100E+00 5.4570E-02 2046300200033 1.5280E-02 9.0000E-04 2.2520E+00 5.3320E-02 2046300200034 1.7430E-02 1.1000E-03 2.2370E+00 5.1880E-02 2046300200035 2.0060E-02 1.3000E-03 2.2460E+00 5.0620E-02 2046300200036 2.3350E-02 1.7000E-03 2.2980E+00 5.0750E-02 2046300200037 2.7520E-02 2.2000E-03 2.3200E+00 4.9880E-02 2046300200038 4.2160E-02 2.0000E-03 2.5100E+00 6.7220E-02 2046300200039 4.7010E-02 2.5000E-03 2.4990E+00 5.3540E-02 2046300200040 5.2740E-02 3.0000E-03 2.5020E+00 5.2110E-02 2046300200041 5.9600E-02 3.0000E-03 2.5650E+00 4.8460E-02 2046300200042 6.7880E-02 4.0000E-03 2.5610E+00 4.4570E-02 2046300200043 7.8030E-02 5.0000E-03 2.6210E+00 4.6660E-02 2046300200044 1.0650E-01 8.0000E-03 2.8920E+00 4.6560E-02 2046300200045 1.2710E-01 1.1000E-02 2.9740E+00 3.3160E-02 2046300200046 ENDDATA 32 0 2046300200047 ENDSUBENT 46 0 2046300299999 ENDENTRY 2 0 2046399999999