ENTRY            21720   19810723                             00002172000000001 
SUBENT        21720001   19810723                             00002172000100001 
BIB                 14         22                                 2172000100002 
INSTITUTE  (2BLGGHT) INSTITUTE FOR NUCLEAR SCIENCES.              2172000100003 
REFERENCE  (J,RCA,19,(3),100,7312) SHORT REPORT.                  2172000100004 
AUTHOR     (P.DE REGGE,R.ADAMS,J.HOSTE)                           2172000100005 
TITLE      -THE MEAN FISSION NEUTRON CROSS SECTION FOR THE        2172000100006 
            REACTION F-19(N,2N)F-18 -.                            2172000100007 
FACILITY   (REAC ) THETIS REACTOR AT GHENT UNIVERSITY.            2172000100008 
INC-SOURCE (REAC ) IRRADIATION IN REACTOR CORE FOR 2 TO 3 HOURS.  2172000100009 
INC-SPECT  .FAST NEUTRON SPECTRUM AGREES TO WITHIN 10 PC          2172000100010 
            ON ALUMINIUM FLUX MONITORS TO A PURE FISSION NEUTRON  2172000100011 
            SPECTRUM, SEE RCA,12,69,1972.                         2172000100012 
SAMPLE     .ABOUT 500 MG OF AMMONIUM FLOURIDE WERE IRRADIATED.    2172000100013 
            CHEMICAL SEPERATION BY CATION EXCHANGE WAS DONE TO    2172000100014 
            REMOVE IMPURITIES OF NA-24,MN-56,BR-80,CL-38 AND      2172000100015 
            I-128.                                                2172000100016 
METHOD     (ACTIV) ACTIVATION OF F-18.                            2172000100017 
DETECTOR   (NAICR) NIA(TL) SCINTILLATOR CRYSTAL, 3 BY 3 INCH.     2172000100018 
MONITOR    (13-AL-27(N,A)11-NA-24,,SIG,,FIS) VALUE TAKEN          2172000100019 
            AS 0.60+-0.03 MICRO-B.                                2172000100020 
STATUS     .TABLE 1, PAGE 101, RCA,19,3,100,1973.                 2172000100021 
HISTORY    (810111C)                                              2172000100022 
           (810120E)                                              2172000100023 
ERR-ANALYS (ERR-T) TOTAL UNCERTAINTY, NO DETAILS.                 2172000100024 
ENDBIB              22          0                                 2172000100025 
COMMON               3          3                                 2172000100026 
EN-DUMMY   MONIT      MONIT-ERR                                   2172000100027 
MEV        MB         MB                                          2172000100028 
 1.5000E+00 6.0000E-04 3.0000E-05                                 2172000100029 
ENDCOMMON            3          0                                 2172000100030 
ENDSUBENT           29          0                                 2172000199999 
SUBENT        21720002   19810120                             00002172000200001 
BIB                  5          9                                 2172000200002 
REACTION   (9-F-19(N,2N)9-F-18,,SIG,,FIS) FISSION SPECTRUM        2172000200003 
            AVERAGE CROSS SECTION.                                2172000200004 
ANALYSIS   .VALUE IS THE WEIGHTED MEAN OF  FOUR INDEPENDANT       2172000200005 
            MEASUREMENTS.                                         2172000200006 
DECAY-DATA (9-F-18,110.MIN,AR,511.,0.97) 97 PERCENT BRANCHING     2172000200007 
            RATIO FOR THE B+ DECAY.                               2172000200008 
STATUS     .TABLE 1.                                              2172000200009 
HISTORY    (810111C)                                              2172000200010 
           (810120E)                                              2172000200011 
ENDBIB               9          0                                 2172000200012 
NOCOMMON             0          0                                 2172000200013 
DATA                 2          1                                 2172000200014 
DATA       ERR-T                                                  2172000200015 
MB         MB                                                     2172000200016 
 7.1000E-03 6.0000E-05                                            2172000200017 
ENDDATA              3          0                                 2172000200018 
ENDSUBENT           17          0                                 2172000299999 
ENDENTRY             2          0                                 2172099999999