ENTRY            20795          0
SUBENT        20795001          0
BIB
REFERENCE  (R,AWRE-O-72/,72,7211) SAME AS EANDC(UK)142-AL         
           (R,AWRE-O-47/,69,6908) FOR DETECTOR DESCRIPTION        
AUTHOR     (D.S.MATHER,P.F.BAMPTON,R.E.COLES,G.JAMES,P.J.NIND)    
TITLE      -MEASUREMENT OF (N,2N) CROSS SECTIONS FOR INCIDENT     
            ENERGIES BETWEEN 6 AND 14 MEV-.                       
INSTITUTE  (2UK ALD)                                              
FACILITY   (VDG  ) 6MV VAN DE GRAAFF. 1 MICRO-SEC PULSES AT       
            9KHZ BY A TOP TERMINAL PULSER.                        
INC-SOURCE (D-T  ) FOR 14.3 MEV MEASUREMENTS NEUTRONS WERE        
            PRODUCED BY THE T(D,N) REACTION ON A 2.5MG/CM*2       
            THICK TI-T TARGET WITH 2 MEV DEUTERONS AND A          
            COLLIMATOR ANGLE OF 97 DEG TO THE FORWARD DIRECTION   
            ENERGY SPREAD ABOUT 200 KEV.                          
              FOR 12.4 MEV NEUTRONS THE COLLIMATOR WAS TURNED     
            TO 145 DEGREES, AND 3.5MEV DEUTERONS. EFFECTIVE       
            TARGET THICKNESS WAS 12.5 MG/CM*2 GIVING A NEUTRON    
            SPECTRUM BETWEEN 12.35 AND 12.52 MEV,MEAN 12.4MEV     
           (D-D  ) FOR 6 TO 9MEV NEUTRONS THE D(D,N) REACTION     
            AND A DEUTERIUM GAS CELL WERE USED. COLLIMATOR AT     
            5 DEGREES AND 2MM APERTURE. THE 3.2 MG/CM*2 MO        
            WINDOW TO THE GAS CELL ACCOUTED FOR 140 TO 180KEV     
            LOSS IN NEUTRON ENERGY. NEUTRON ENERGY SPREAD OF      
            60 TO 100KEV.                                         
METHOD     .THE NUMBER OF 20 MICRO-SEC GATES AFTER A NEUTRON      
            PULSE CONTAINING 2 OR 3 PULSES FROM NEUTRON           
            CAPTURE IN THE SCINTILLATOR.                          
PART-DET   (N    ) NEUTRONS DETECTED IN LARGE LOADED LIQ SCIN     
DETECTOR   (STANK) LARGE LOADED LIQUID SCINTILLATOR DESCRIBED     
            IN PR/B 133 1403 1964                                 
CORRECTION .CORRECTION DESCRIBED IN DETAIL IN AWRE-O47/69.        
            SAMPLE COMPOSITION AND IMPURITIES.                    
            NEUTRON FLUX ATTENUATION IN SAMPLE AND THE U-238      
            MONITOR BLOCK                                         
            PRESENCE OF LOWER ENERGY NEUTRONS IN INCIDENT BEAM    
            MULTIPLE EVENTS IN BEAM BURST, DOUBLE FISSIONS        
            THE EFFECT OF NEUTRON ENERGY SPREAD ON STANDARD       
            FISSION CROSS SECTIONS.                               
            LOSS OF SECONDARY NEUTRONS IN THE SAMPLE.             
            NON-UNIFORM ENERGY RESPONSE OF THE LIQUID SCINT.      
            MULTIPLE EVENTS IN BEAM BURST, NEUTRON PULSES         
            FINITE SIZE OF SAMPLE                                 
            CHANGE IN COUNTER EFFICIENCY WITH SAMPLE (LT 0.2PC)   
            REACTIONS IN SAMPLE HOLDERS                           
            PRODUCTION OF (N,2N) EVENTS IN STEEL TUBES.           
            LOSS OF NEUTRONS THROUGH AXIAL HOLE.                  
ERR-ANALYS .ERROR CONTRIBUTIONS FROM NEUTRON FISSION              
            MULTIPLICITIES WERE INCLUDED WITH COUNTING            
            STATISTICAL UNCERTAINTIES.TOTAL ERROR QUOTED IS       
            ONE STANDARD DEVIATION.                               
STATUS     .FROM TABLES IN AWRE O72/72                            
HISTORY    (781013C) PDJ. RECOMPILED FROM NEUDADA.                
           (790219E)                                              
           (20050810N) Converted from iso-quant
ENDBIB
NOCOMMON             0          0
ENDSUBENT