ENTRY            14733   20220118                             14961473300000001 
SUBENT        14733001   20220118                             14961473300100001 
BIB                  9         17                                 1473300100002 
TITLE      The ratio of the fission cross sections of 49 and 25   1473300100003 
           for thermal neutrons and the ration [1+alpha(49)]/     1473300100004 
           [1+alpha(25)]                                          1473300100005 
AUTHOR     (J.W.Dewire,R.R.Wilson,W.D.Woodward)                   1473300100006 
REFERENCE  (R,LA-103,1944)                                        1473300100007 
REL-REF    (R,14734001,E.E.Anderson+,S,LA-91,1944) 239Pu          1473300100008 
           absorption cross section.                              1473300100009 
INSTITUTE  (1USALAS)                                              1473300100010 
FACILITY   (CYCLO,1USALAS)                                        1473300100011 
INC-SOURCE (D-BE) A thermalized neutron flux of about 2*10**5     1473300100012 
           neutrons/cm2/sec at the center of the 11'*7'*6'8"      1473300100013 
           graphite block at the cyclotron.                       1473300100014 
DETECTOR   (IOCH) The comparison chamber consisted of two         1473300100015 
           parallel plate ionization chambers having a common     1473300100016 
           high voltage electrode, on which the samples were      1473300100017 
           placed.                                                1473300100018 
HISTORY    (20220118C) BP                                         1473300100019 
ENDBIB              17          0                                 1473300100020 
COMMON               1          3                                 1473300100021 
EN-DUMMY                                                          1473300100022 
EV                                                                1473300100023 
     0.0253                                                       1473300100024 
ENDCOMMON            3          0                                 1473300100025 
ENDSUBENT           24          0                                 1473300199999 
SUBENT        14733002   20220118                             14961473300200001 
BIB                  5         14                                 1473300200002 
REACTION   ((94-PU-239(N,F),,SIG,,SPA)/(92-U-235(N,F),,SIG,,SPA)) 1473300200003 
SAMPLE     Six foils of 235U and four foils of 239Pu were used    1473300200004 
           in the experiment. All the foils were deposited on 1   1473300200005 
           or 2 mil Pt. All the weights are based on a half life  1473300200006 
           for 239Pu of 24,400 years.                             1473300200007 
ERR-ANALYS (DATA-ERR) In order to find any systematic errors in   1473300200008 
           counting, a 239Pu foil and a 235U foil were compared   1473300200009 
           under conditions obtained by separately interchanging  1473300200010 
           scalars, amplifiers, and foils, and by moving the      1473300200011 
           chamber within the block. No significant change in     1473300200012 
           the counting ratio were detected. No further details   1473300200013 
           on how the given uncertainty was determined.           1473300200014 
DECAY-DATA (94-PU-239,24400.YR)                                   1473300200015 
STATUS     (TABLE) page 5.                                        1473300200016 
ENDBIB              14          0                                 1473300200017 
NOCOMMON             0          0                                 1473300200018 
DATA                 2          1                                 1473300200019 
DATA       DATA-ERR                                               1473300200020 
NO-DIM     NO-DIM                                                 1473300200021 
       1.40       0.02                                            1473300200022 
ENDDATA              3          0                                 1473300200023 
ENDSUBENT           22          0                                 1473300299999 
SUBENT        14733003   20220118                             14961473300300001 
BIB                  4         10                                 1473300300002 
REACTION   (((94-PU-239(N,ABS),,SIG,,SPA)/                        1473300300003 
           (92-U-235(N,ABS),,SIG,,SPA))/                          1473300300004 
           ((94-PU-239(N,F),,SIG,,SPA)/(92-U-235(N,F),,SIG,,SPA)))1473300300005 
ANALYSIS   The following relation was used: [1+alpha(239Pu)]/     1473300300006 
           [1+alpha(235U)] = ((sigma abs(239Pu)/sigma abs(235U))/ 1473300300007 
            (sigmaf(235U)/sigmaf(239Pu))).                        1473300300008 
ASSUMED    (ASSUM1,94-PU-239(N,ABS),,SIG)                         1473300300009 
           (ASSUM2,92-U-235(N,ABS),,SIG)                          1473300300010 
STATUS     (DEP,14733002)                                         1473300300011 
           (TABLE) page 7.                                        1473300300012 
ENDBIB              10          0                                 1473300300013 
NOCOMMON             0          0                                 1473300300014 
DATA                 3          1                                 1473300300015 
DATA       ASSUM1     ASSUM2                                      1473300300016 
NO-DIM     B          B                                           1473300300017 
       1.29     1056.0      640.0                                 1473300300018 
ENDDATA              3          0                                 1473300300019 
ENDSUBENT           18          0                                 1473300399999 
ENDENTRY             3          0                                 1473399999999