ENTRY            13844   20020812                             00001384400000001 
SUBENT        13844001   20020812                             00001384400100001 
BIB                 16         35                                 1384400100002 
INSTITUTE  (1USABNL)                                              1384400100003 
REFERENCE  (J,NSE,14,224,1962)                                    1384400100004 
AUTHOR     (E.Starr,J.Koppel)                                     1384400100005 
TITLE      Determination of Diffusion Hardening in Water.         1384400100006 
FACILITY   (REAC,1USABNL) Brookhaven Graphite Reactor             1384400100007 
INC-SOURCE (REAC)                                                 1384400100008 
INC-SPECT  Thermal spectrum with a flux at reactor face ~1E+7     1384400100009 
            neutrons/(cm2.s).                                     1384400100010 
SAMPLE     H3BO3 poisoned demineralized water in a cylindrical    1384400100011 
            tank, 5.5 ft in diam. by 5 ft high, situated atop the 1384400100012 
            graphite face of the reactor.                         1384400100013 
METHOD     (ACTIV) Measured diffusion length as a function of     1384400100014 
            boric acid concentration by activation of In foils.   1384400100015 
           Relative flux measured with bare indium foils placed   1384400100016 
            on a line perpendicular to the plane source. Effect   1384400100017 
            of epicadmium neutrons determined with a cadmium      1384400100018 
            sheet positioned between source and water tank.       1384400100019 
DETECTOR   (PROPC) Four gas flow proportional counters.           1384400100020 
ANALYSIS   Corrected relative activity of foils least square      1384400100021 
            fitted to exponential spatial distribution to find    1384400100022 
            relaxation length.                                    1384400100023 
           Relaxation length corrected for leakage effect using   1384400100024 
            data obtained from radial activity fit.               1384400100025 
           Absorption cross section derived from least square     1384400100026 
            fit to the set of experimental points.                1384400100027 
MONITOR    Detectors calibrated using standard source.            1384400100028 
CORRECTION Activity of the foils corrected for:                   1384400100029 
           . counter dead time                                    1384400100030 
           . counter background                                   1384400100031 
           . known indium decay                                   1384400100032 
           Relaxation length correction due to leakage effect     1384400100033 
            greatest (0.6%) for pure water data.                  1384400100034 
ERR-ANALYS (DATA-ERR) Absolute uncertainties given.               1384400100035 
STATUS     Data taken from reference.                             1384400100036 
HISTORY    (20020730C) IS                                         1384400100037 
ENDBIB              35          0                                 1384400100038 
NOCOMMON             0          0                                 1384400100039 
ENDSUBENT           38          0                                 1384400199999 
SUBENT        13844002   20020812                             00001384400200001 
BIB                  1          1                                 1384400200002 
REACTION   (1-H-1(N,G)1-H-2,,SIG,,SPA,DERIV)                      1384400200003 
ENDBIB               1          0                                 1384400200004 
NOCOMMON             0          0                                 1384400200005 
DATA                 3          1                                 1384400200006 
EN-DUMMY   DATA       DATA-ERR                                    1384400200007 
EV         MB         MB                                          1384400200008 
  0.0253   326.9        1.6                                       1384400200009 
ENDDATA              3          0                                 1384400200010 
ENDSUBENT            9          0                                 1384400299999 
ENDENTRY             2          0                                 1384499999999