ENTRY 20460 19840120 00002046000000001 SUBENT 20460001 19840120 00002046000100001 BIB 15 45 2046000100002 INSTITUTE (2UK HAR) 2046000100003 REFERENCE (J,JNE,23,625,6912) SUPERSEDES 2046000100004 (J,JNE,23,369,6907) AND 2046000100005 (J,JNE,23,1,6903) BASED ON LESS PRECISE DETERMINATION 2046000100006 OF THE HEAVY-WATER PURITY, AND 2046000100007 (R,AERE-M-2034,6805) SAME AS JNE,23,1. 2046000100008 AUTHOR (M.G.SILK, B.O.WADE) 2046000100009 TITLE -THE ABSORPTION CROSS-SECTION OF DEUTERIUM.- 2046000100010 FACILITY 2 CONTAINERS, THE SMALLER ONE WITH BUCKLING RANGING 2046000100011 B= 36 - 221 M**-2 2046000100012 THE LARGER ONE WITH BUCKLING RANGING 2046000100013 B= 23 - 10 M**-2. 2046000100014 INC-SOURCE 'K-TUBE' BY ELLIOTT BROS.LTD DESCRIBED IN AERE-M 745 2046000100015 WHICH PROVIDES 10 MICRO-SEC. PULSES OF 14 MEV NEUTRONS2046000100016 FROM 2046000100017 (D-T ) REACTION. 2046000100018 SAMPLE .REACTOR GRADE D2O. 2046000100019 .ISOTOPIC PURITY OF HEAVY WATER = 99.768 +- 2046000100020 0.008 PERC.-WEIGHT (BY INFRA-RED SPECTROMETRY). 2046000100021 METHOD (SLODT) SLOWING-DOWN TIME. 2046000100022 DETECTOR (SCIN) 2 LIQUID SCINTILLATION COUNTERS,NE 311, EACH2046000100023 2 IN.DIA. BY 1.5 IN.THICK, FOR N-DECTION OF THE 2046000100024 SMALLER CONTAINER, 2046000100025 (PROPC) 4 MATCHED BF3 COUNTERS (12EB40) FOR THE 2046000100026 LARGER CONTAINER. 2046000100027 CONVENTIONAL ELECTRONIC SYSTEM USING A LABEN ANALYSER 2046000100028 IN THE MULTISCALER MODE. A FAST (10 MC/S) 32 CHANNEL 2046000100029 BUFFER STORE WITH A LOW (2 MICRO-SEC) DEAD TIME USED. 2046000100030 MONITOR (1-H-1(N,G)1-H-2,,SIG) VALUE 333.0+-0.7 MB AT 2200 M/SE2046000100031 ALSO CHECKED WITH O-0(N,G) WITH VALUE 2046000100032 OF 0.265+-0.026 MB AT 2200 M/SEC. 2046000100033 PART-DET (N ) NEUTRONS. 2046000100034 COMMENT IN ADDITION TO THE MEASURED VALUES THE PUBLICATION 2046000100035 GIVES ALSO THE BEST VALUES FOR THE 2200 M/SEC 2046000100036 ABSORPTION SIGMA OF D2O (1.321+-0.031 MB) AND 2046000100037 OF D (0.528+-0.009 MB) DERIVED FROM THE PRESENT 2046000100038 AND OTHER EXPERIMENTS. 2046000100039 STATUS .DATA FROM TABLE 2, PAG.627 OF THE PUBLICATION. 2046000100040 HISTORY (710112C) 2046000100041 (760112E) 2046000100042 (801106A) MONITOR AND ERR-ANALYSIS CHANGED. 2046000100043 (801204E) 2046000100044 ERR-ANALYS (ERR-S) STATISTICAL ERROR WAS 3.5 PERCENT. 2046000100045 (ERR-T) TOTAL UNCERTAINTY INCLUDES A MAJOR 2046000100046 CONTRIBUTION FROM THE H2O IMPURITY. 2046000100047 ENDBIB 45 0 2046000100048 COMMON 4 3 2046000100049 EN MONIT MONIT-ERR ERR-S 2046000100050 EV MB MB PER-CENT 2046000100051 2.5300E-02 3.3300E+02 7.0000E-01 3.5000E+00 2046000100052 ENDCOMMON 3 0 2046000100053 ENDSUBENT 52 0 2046000199999 SUBENT 20460002 19840120 00002046000200001 BIB 3 6 2046000200002 REACTION (1-H-2(N,G)1-H-3,,SIG) CAPTURE CROSS SECTION. 2046000200003 STATUS .TABLE 2. 2046000200004 HISTORY (710112C) 2046000200005 (760112E) 2046000200006 (801106A) REACTION RE-DEFINED. 2046000200007 (801204E) 2046000200008 ENDBIB 6 0 2046000200009 NOCOMMON 0 0 2046000200010 DATA 2 1 2046000200011 DATA ERR-T 2046000200012 MB MB 2046000200013 5.2300E-01 2.9000E-02 2046000200014 ENDDATA 3 0 2046000200015 ENDSUBENT 14 0 2046000299999 SUBENT 20460003 19840120 00002046000300001 BIB 3 6 2046000300002 REACTION (1-H-D2O(N,G),,SIG) CAPTURE CROSS SECTION. 2046000300003 STATUS .TABLE 2. 2046000300004 HISTORY (710112C) 2046000300005 (760112E) 2046000300006 (801106A) REACTION RE-DEFINED. 2046000300007 (801204E) 2046000300008 ENDBIB 6 0 2046000300009 NOCOMMON 0 0 2046000300010 DATA 2 1 2046000300011 DATA ERR-T 2046000300012 MB MB 2046000300013 1.3110E+00 5.2000E-02 2046000300014 ENDDATA 3 0 2046000300015 ENDSUBENT 14 0 2046000399999 ENDENTRY 3 0 2046099999999