ENTRY            L0282   20221107                             L051L0282000    1 
SUBENT        L0282001   20221107                             L051L0282001    1 
BIB                 12         21                                 L0282001    2 
TITLE      Photo Neutron Thresholds for Pb206, Pb207, Pb208       L0282001    3 
AUTHOR     (H.Palevsky,A.O.Hanson)                                L0282001    4 
REFERENCE  (J,PR,79,242(X11),1950)                                L0282001    5 
INSTITUTE  (1USAUI)                                               L0282001    6 
FACILITY   (BETAT,1USAORL) The 22 MeV betatron.                   L0282001    7 
DETECTOR   (BF3) Gated BF3 proportional counters.                 L0282001    8 
SAMPLE     Separated lead isotopes.                               L0282001    9 
METHOD     The experimental apparatus utilized the electron beam, L0282001   10 
           focused on copper sample holders at about eleven feet  L0282001   11 
           from the betatron. This reduced the background         L0282001   12 
           neutrons from the betatron to a negligible amount.     L0282001   13 
           Gated BF3 proportional counters were used to detect    L0282001   14 
           the neutrons after each electron burst. Two samples    L0282001   15 
           were rotated synchronously in front of the beam, so    L0282001   16 
           that each was irradiated on alternate bursts.          L0282001   17 
ANALYSIS   The yield versus energy data could, in each case, be   L0282001   18 
           represented as a parabola with the vertex at the       L0282001   19 
           respective threshold.                                  L0282001   20 
ERR-ANALYS (DATA-ERR) No details on sources of uncertainties.     L0282001   21 
STATUS     (TABLE,,H.Palevsky+,J,PR,79,(X11),242,1950) page 242   L0282001   22 
HISTORY    (20221107C)                                            L0282001   23 
ENDBIB              21          0                                 L0282001   24 
NOCOMMON             0          0                                 L0282001   25 
ENDSUBENT           24          0                                 L028200199999 
SUBENT        L0282002   20221107                             L051L0282002    1 
BIB                  1          2                                 L0282002    2 
REACTION   ((82-PB-207(G,X)0-NN-1,,SIG,,BRA)/                     L0282002    3 
           (82-PB-206(G,X)0-NN-1,,SIG,,BRA))                      L0282002    4 
ENDBIB               2          0                                 L0282002    5 
NOCOMMON             0          0                                 L0282002    6 
DATA                 3          1                                 L0282002    7 
EN-MAX     DATA       DATA-ERR                                    L0282002    8 
MEV        NO-DIM     NO-DIM                                      L0282002    9 
        22.       0.80       0.02                                 L0282002   10 
ENDDATA              3          0                                 L0282002   11 
ENDSUBENT           10          0                                 L028200299999 
SUBENT        L0282003   20221107                             L051L0282003    1 
BIB                  1          2                                 L0282003    2 
REACTION   ((82-PB-208(G,X)0-NN-1,,SIG,,BRA)/                     L0282003    3 
           (82-PB-206(G,X)0-NN-1,,SIG,,BRA))                      L0282003    4 
ENDBIB               2          0                                 L0282003    5 
NOCOMMON             0          0                                 L0282003    6 
DATA                 3          1                                 L0282003    7 
EN-MAX     DATA       DATA-ERR                                    L0282003    8 
MEV        NO-DIM     NO-DIM                                      L0282003    9 
        22.       0.99       0.02                                 L0282003   10 
ENDDATA              3          0                                 L0282003   11 
ENDSUBENT           10          0                                 L028200399999 
ENDENTRY             3          0                                 L028299999999