ENTRY 20078 20190927 22832007800000001 SUBENT 20078001 20190927 22832007800100001 BIB 15 34 2007800100002 TITLE Determination of the diffusion parameters for thermal 2007800100003 neutrons in water using the pulsed method and 2007800100004 spherical geometries 2007800100005 AUTHOR (J.Elkert) 2007800100006 REFERENCE (J,NUK,11,159,1968) 2007800100007 INSTITUTE (2SWDCTH) 2007800100008 FACILITY (VDG,2SWDCTH) SAMES type accelerator 2007800100009 INC-SOURCE (D-T) Deuteron-tritium 2007800100010 INC-SPECT Thermalized neutrons 2007800100011 SAMPLE Ten water-filled aluminium spheres, maximal 2007800100012 eccentricity 0.15, diameters from 5 to 20 cm, 2007800100013 covering a buckling range of 0.09 to 1.3 /cm2. 2007800100014 METHOD (PLSED) Pulse die-away in spherical tanks. 2007800100015 DETECTOR (BF3) Two BF3-proportional counters, mounted 2007800100016 outside the spheres. 2007800100017 ANALYSIS The decay constants from the different spherical tanks2007800100018 have been fitted to a second degree polynomial in the 2007800100019 buckling. Each point was weighted by its variance. 2007800100020 The cross-section is derived from the zero degree term2007800100021 CORRECTION The decay curves have been corrected for 2007800100022 dead time and coincidences in the time analyzer. 2007800100023 A small background. 2007800100024 Higher modes by an iterative computer program 2007800100025 dropping one by one the first channels until a 2007800100026 constant lambda (decay constant) results. 2007800100027 All data have been reduced on a constant temperature 2007800100028 of 21.7 degrees-Celsius. 2007800100029 Other corrections turned out to be negligible. 2007800100030 ERR-ANALYS (DATA-ERR) The error is due to the standard errors in 2007800100031 the fitting to the buckling polynomial. 2007800100032 STATUS (TABLE) Nukleonik,11(1968)159 2007800100033 HISTORY (19710525T) From NEUDADA file 2007800100034 (20190927U) SD:Updated to new date formats,lower case. 2007800100035 BIB updated in all Subents. 2007800100036 ENDBIB 34 0 2007800100037 NOCOMMON 0 0 2007800100038 ENDSUBENT 37 0 2007800199999 SUBENT 20078002 20190927 22832007800200001 BIB 1 1 2007800200002 REACTION (1-H-1(N,G)1-H-2,,SIG,,MXW) 2007800200003 ENDBIB 1 0 2007800200004 NOCOMMON 0 0 2007800200005 DATA 3 1 2007800200006 EN-DUMMY DATA DATA-ERR 2007800200007 MEV B B 2007800200008 2.53E-08 0.328 0.004 2007800200009 ENDDATA 3 0 2007800200010 ENDSUBENT 9 0 2007800299999 ENDENTRY 2 0 2007899999999