ENTRY            22263     950420
SUBENT        22263001     950420
BIB                 17         63                                 
INSTITUTE  (2JPNTIT)                                              
REFERENCE  (J,NP/A,536,285,9201)                                  
AUTHOR     (M.IGASHIRA,H.KITAZAWA,K.TAKAURA)                      
TITLE      -VALENCE-NEUTRON CAPTURE IN THE 434 KEV P-3/2-WAVE     
            RESONANCE OF O-16.                                    
FACILITY   (VDGT ) THE 3.2 MV PELLETRON ACCELERATOR AT THE TOKYO  
            INSTITUTE OF TECHNOLOGY. THE MACHINE IS PULSED WITH A 
            PULSE WIDTH OF 1.5 NS FWHM AND A REPETITION RATE OF   
            2 MHZ. THE AVERAGE BEAM CURRENTS WERE 7 AND 12 MICRO- 
            AMPS AT AND OFF RESONANCE, RESPECTIVELY.              
INC-SOURCE (P-LI7) KEV NEUTRONS WERE PRODUCED BY BOMBARDING A     
            LITHIUM TARGET WITH PROTONS FROM THE PELLETRON.       
INC-SPECT  .THE NEUTRON SPECTRUM WAS MEASURED BY TIME-OF-FLIGHT,  
            USING A LI-6 GLASS DETECTOR.                          
SAMPLE     .THE TARGET CONSISTED OF BERYLLIUM-OXIDE POWDER, CON-  
            TAINED IN A CASE MADE OF ACRYLIC ACID RESIN. THE      
            SAMPLE DIAMETER WAS 5.9 CM AND THE THICKNESS WAS 1.5  
            CM IN THE RESONANCE EXPERIMENT AND 2.7 CM IN THE OFF- 
            RESONANCE EXPERIMENT. THE SAMPLE WAS PLACED AT A      
            DISTANCE OF 15.6 CM FROM THE NEUTRON SOURCE.          
           .THE ABSOLUTE NUMBER OF SOURCE NEUTRONS WERE DETERMINED
            USING A GOLD SAMPLE, 5.5 CM IN DIAMETER AND 0.17 CM   
            THICK.                                                
METHOD     (GSPEC) IN-BEAM GAMMA-RAY SPECTROSCOPY.                
           (TOF  ) NEUTRON-GAMMA SEPARATION WAS OBTAINED WITH     
            TIME-OF-FLIGHT TECHNIQUES.                            
DETECTOR   (GLASD) TWO LI-6 GLASS SCINTILLATOR, ONE LOCATED AT    
            3 M FROM THE NEUTRON SOURCE AND AT 7 DEGREES TO THE   
            PROTON BEAM DIRECTION, WAS USED TO MEASURE            
            THE RELATIVE AVERAGE NEUTRON SPECTRUM.                
                   A SECOND LI-6 GLASS DETECTOR, LOCATED AT 1 M   
            FROM THE SOURCE AND AT 45 DEGREES TO THE PROTON BEAM  
            DIRECTION, WAS USED TO MONITOR THE NUMBER OF NEUTRONS 
            EMITTED FROM THE SOURCE.                              
           (NAICR) CAPTURE GAMMA-RAYS WERE DETECTED WITH A WELL-  
            SHIELDED ANTI-COMPTON NAI-TL DETECTOR, PLACED AT 80 CM
            FROM THE SAMPLE AND AT 125 DEGREES TO THE PROTON BEAM 
            DIRECTION. A LI-6-HYDRIDE SHIELD WAS INSERTED IN THE  
            COLLIMATOR.                                           
PART-DET   (G    )                                                
ANALYSIS   .THE CAPTURE CROSS SECTIONS WERE OBTAINED BY MULTI-    
            PLYING THE 125 DEGREES DIFFERENTIAL CROSS SECTIONS    
            WITH 4 PI.                                            
MONITOR    (79-AU-197(N,G)79-AU-198,PAR,DA) THE STANDARD AU-197   
            CAPTURE CROSS SECTION FROM ENDF/B-V WAS USED.         
CORRECTION .CORRECTIONS WERE APPLIED FOR NEUTRON ATTENUATION IN   
            AIR, FOR NEUTRON SELF-SHIELDING IN THE SAMPLES, FOR   
            NEUTRON MULTIPLE SCATTERING IN THE SAMPLES, FOR GAMMA-
            RAY ABSORPTION IN THE SAMPLES, AND FOR THE DEPENDENCE 
            OF THE GAMMA-RAY DETECTION EFFICIENCY ON THE GAMMA-RAY
            SOURCE POSITION.                                      
ERR-ANALYS (DATA-ERR) THE ERRORS GIVEN CONTAIN THE STATISTICAL    
                 ERROR, THE ERROR OF THE GAMMA-RAY SPECTROMETER   
            EFFICIENCY, THE ERROR OF THE RELATIVE EFFICIENCY OF   
            THE LI-6 GLASS DETECTORS, THE ERROR OF THE WEIGHTING  
            FUNCTION OF THE GAMMA-RAY SPECTROMETER, THE ERROR OF  
            THE STANDARD CAPTURE CROSS SECTION OF AU-197, AND THE 
            ERRORS OF THE RESONANCE PARAMETERS OF THE 434 KEV     
            RESONANCE.                                            
STATUS     .DATA TAKEN FROM MAIN REF.                             
HISTORY    (940106C) N.O.                                         
           (950420E)                                              
           (961030A)  * * CORRECTED BY S. MAEV         * *        
ENDBIB              63          0                                 
NOCOMMON
ENDSUBENT           66          0