ENTRY            40637   20231006                             421540637  0    1 
SUBENT        40637001   20231006                             421540637  1    1 
BIB                 14         27                                 40637  1    2 
TITLE      Cross section for the reaction Th232(n,2n)Th231        40637  1    3 
           at 14.7 MeV neutron energy                             40637  1    4 
AUTHOR     (Yu.A.Zysin,A.A.Kovrizhnykh,A.A.Lbov,L.I.Sel'chenkov)  40637  1    5 
REFERENCE  (J,SJA,8,310,1961) Engl.translation of AE,8,360,1960   40637  1    6 
           (J,AE,8,360,1960) Issue 4.                             40637  1    7 
INSTITUTE  (4RUSKUR)                                              40637  1    8 
EXP-YEAR   (1956) 1956 - 1957 years.                              40637  1    9 
FACILITY   (LINAC,4RUSKUR) Low-voltage linear accelerator.        40637  1   10 
INC-SOURCE (D-T) Deuteron energy ~ 150 keV.                       40637  1   11 
SAMPLE      Mixture of the thorium nitrate Th(NO(3))(4)*4H(2)O    40637  1   12 
            (0.2 g) and uranium oxide U(3)O(8) (0.6 g).           40637  1   13 
            Placed at ~ 7 mm distance from tritium target center. 40637  1   14 
METHOD     (ACTIV) Six irradiations, time of irradiation 3-11 hr. 40637  1   15 
           (CHSEP) For required isotopes.                         40637  1   16 
DETECTOR   (D4PI)                                                 40637  1   17 
ASSUMED    (ASSUM1,92-U-238(N,F),,SIG)                            40637  1   18 
           (ASSUM2,92-U-238(N,F)42-MO-99,CUM,FY)                  40637  1   19 
           (ASSUM3,92-U-238(N,F)56-BA-140,CUM,FY)                 40637  1   20 
PART-DET   (B-)                                                   40637  1   21 
CORRECTION  For disintegration during the irradiation time,       40637  1   22 
           and for Tc99m and La140.                               40637  1   23 
           For increasing activity of the natural decay products  40637  1   24 
           of Th232.                                              40637  1   25 
HISTORY    (19831011C)  Compiled at the centre                    40637  1   26 
           (20231006A) EN-NRM=14.7 MeV was deleted ( the same as  40637  1   27 
           incident neutron energy EN).                           40637  1   28 
           MONITOR -> ASSUMED . 4RUSRUS -> 4RUKUR                 40637  1   29 
ENDBIB              27          0                                 40637  1   30 
COMMON               3          3                                 40637  1   31 
ASSUM1     ASSUM2     ASSUM3                                      40637  1   32 
B          PC/FIS     PC/FIS                                      40637  1   33 
 1.1        6.3        4.7                                        40637  1   34 
ENDCOMMON            3          0                                 40637  1   35 
ENDSUBENT           34          0                                 40637  199999 
SUBENT        40637002   20231006                             421540637  2    1 
BIB                  4         19                                 40637  2    2 
REACTION   (90-TH-232(N,2N)90-TH-231,,SIG)                        40637  2    3 
ANALYSIS   Formula for n,2n cross section calculation is given    40637  2    4 
           on page 310 of SJA,8,310,1961:                         40637  2    5 
            SIGn,2n=((Nth*HLth)/(Nmo*HLmo))*                      40637  2    6 
            (SIGufis*Ymou*(232Pu/238Pth)+SIGthfis*Ymoth)),        40637  2    7 
            where                                                 40637  2    8 
           SIGufis, SIGthfis - fission cross-section for U238 and 40637  2    9 
           Th232 at 14 MeV;                                       40637  2   10 
           HLth, HLmo - half-life of Th231 and Mo99 (or Ba140);   40637  2   11 
           Nth, Nmo - number of Th231, Mo99 (or Ba140)            40637  2   12 
           disintegrations per time unit at the end irradiation   40637  2   13 
           and referred to the total amounts of Th232 and U-238;  40637  2   14 
           Ymou, YYmoth - Mo ( or Ba) yield at fission of U238 and40637  2   15 
           Th232  at 14 MeV;                                      40637  2   16 
           Pth, Pu - weights of Th232 and U238.                   40637  2   17 
ERR-ANALYS (DATA-ERR) Includes statistical uncertainty and        40637  2   18 
           uncertainties of fission cross sections and fragment   40637  2   19 
           yields.                                                40637  2   20 
STATUS     (TABLE,,Yu.A.Zysin+,J,SJA,8,310,1961) Text page 310.   40637  2   21 
ENDBIB              19          0                                 40637  2   22 
NOCOMMON             0          0                                 40637  2   23 
DATA                 3          1                                 40637  2   24 
EN         DATA       DATA-ERR                                    40637  2   25 
MEV        B          B                                           40637  2   26 
 14.7       0.65       0.15                                       40637  2   27 
ENDDATA              3          0                                 40637  2   28 
ENDSUBENT           27          0                                 40637  299999 
ENDENTRY             2          0                                 4063799999999