ENTRY 21196 19810723 00002119600000001 SUBENT 21196001 19810723 00002119600100001 BIB 13 41 2119600100002 INSTITUTE (2UK HAR) 2119600100003 REFERENCE (J,JNE,5,41,57) 2119600100004 (R,AERE-N/M-62,57) EXPERIMENT 1, WITH B2-O3. 2119600100005 AUTHOR (P.A.EGELSTAFF) 2119600100006 TITLE -THE ABSORPTION CROSS-SECTION OF THE HARWELL BORON 2119600100007 STANDARD FOR NEUTRONS OF 2200 M/SEC- 2119600100008 FACILITY (CHOPS) SLOW CHOPPER. 2119600100009 INC-SOURCE (REAC ) REACTOR. 2119600100010 SAMPLE .B2-O3 DISSOLVED IN SOLUTION OF NA-OD IN D2-O USED IN 2119600100011 ONE SET OF EXPERIMENTS. SOLUTIONS CONTAINED IN SILICA 2119600100012 CELLS CONSISTING OF SILICA PLATES 0.057 INCH THICK 2119600100013 WELDED TO EACH FACE OF A SILICA RING 0.377 INCH 2119600100014 THICK. 2119600100015 .SECOND SET OF MEASUREMENTS USED BORAX GLASS SAMPLES 2119600100016 IN COPPER CANS. 2119600100017 METHOD (TOF ) TRANSMISSION. 2119600100018 DETECTOR .NO DETAILS. 2119600100019 STATUS (NDD ) FROM NEUDADA. 2119600100020 HISTORY (791128T) 2119600100021 (800110E) 2119600100022 (810220A) ERR-ANALYSIS AND SUBENTRY 002 REVISED. 2119600100023 (810310E) 2119600100024 CORRECTION .SMALL CORRECTION TO ALLOW FOR DIFFERENT CONCENTRATION 2119600100025 OF D2-O IN THE SAMPLE AND COMPARISON SOLUTIONS OF 2119600100026 ABOUT 1 OR 2 PERCENT. 2119600100027 ERR-ANALYS (ERR-T) FOR THE B2-O3 RUNS, ERRORS, STANDARD DEVIATIONS2119600100028 COMPOSED OF- 2119600100029 ERROR DUE TO STATISTICS, UNCERTAINTY IN BORON CONTENT 2119600100030 PATH IN SOLUTION AND VELOCITY MEASUREMENT 0.5 PERCENT 2119600100031 CONCENTRATION OF D2-O CORRECTION 0.2 PERCENT. 2119600100032 B2-O3 SCATTERING CROSS-SECTION 0.2 PERCENT. 2119600100033 BINDING EFFECTS IN D2-O 0.5 PERCENT. 2119600100034 TOTAL STANDARD DEVIATION 0.77 PERCENT. 2119600100035 FOR BORAX RUNS, ERRORS COMPOSED OF- 2119600100036 COUNTING STATISTICS 0.15 PERCENT. 2119600100037 INSTABILITY OF COUNTING SYSTEM 0.5 PERCENT. 2119600100038 WATER CONTENT OF SAMPLES 0.5 PERCENT. 2119600100039 AREA OF SAMPLE COVERED BY DIAPHRAGM 0.3 PERCENT 2119600100040 NON-UNIFORMITY OF SAMPLE OVER BEAM AREA 0.2 PERCENT. 2119600100041 VELOCITY MEASUREMENT 0.5 PERCENT. 2119600100042 TOTAL STANDARD DEVIATION 0.95 PERCENT. 2119600100043 ENDBIB 41 0 2119600100044 NOCOMMON 0 0 2119600100045 ENDSUBENT 44 0 2119600199999 SUBENT 21196002 19810310 00002119600200001 BIB 5 15 2119600200002 REACTION (5-B-0(N,A),,SIG) 2119600200003 ANALYSIS .VALUE OF ABSORPTION CROSS SECTION DERIVED FROM 2119600200004 FROM TOTAL CROSS-SECTION OF BORIC OXIDE . 2119600200005 THE VALUE GIVEN IS THE RESULT OF THE COMBINATION OF 2119600200006 VALUES FROM EXPERIMENTS (774+-6 B.) ON BORIC OXIDE 2119600200007 AND ON BORAX (765+-8 B.). 2119600200008 ASSUMED (ASSUM,5-B-CMP(N,EL),,SIG) THE BOUND ATOM SCATTERING 2119600200009 CROSS SECTION OF BORAX (B2O3) IS TAKEN AS 21 B. 2119600200010 STATUS .DATA FROM TEXT OF PUBLICATION. 2119600200011 THIS VALUE DIFFERS FROM THAT GIVEN IN AERE-N/M-62, AND2119600200012 SUPERSEDES THIS VALUE. 2119600200013 HISTORY (791128T) 2119600200014 (800110E) 2119600200015 (810220A) ERR-ANALYS AND ANALYSIS REVISED. 2119600200016 (810310E) 2119600200017 ENDBIB 15 0 2119600200018 NOCOMMON 0 0 2119600200019 DATA 4 1 2119600200020 EN DATA ERR-T ASSUM 2119600200021 EV B B B 2119600200022 2.5300E-02 7.7100E+02 5.0000E+00 2.1000E+01 2119600200023 ENDDATA 3 0 2119600200024 ENDSUBENT 23 0 2119600299999 ENDENTRY 2 0 2119699999999