THE USE OF ACCELERATORS OF CHARGED PARTICLES 421 



electron energy the smaller is the deviation of the reaction radiation, generated 

 in the irradiated medium, from the direction of movement of electrons. 

 Hence in order to distinguish the rocks, their mineral composition and 

 density, with the aid of electron logging, it is necessary to lodge the betatron 

 in the core device so that the hard radiation produced in the rock would 

 reach the gamma quanta counter directly or after the least number of 

 scatterings. 



The possible use of electron logging is in dry bore -holes. In bore -holes 

 filled with drilhng fluid this method cannot be used owing to its small penetra- 

 tive power and technical considerations, such as that an electron beam 

 emerges from the vacuum chamber of the betatron via a thin slit which 

 can be easily closed by the liquid filling the bore-hole. 



CONCLUSION 



The use of the neutron -generators and the gamma quanta in radioactive 

 logging allows a considerable improvement in the effectiveness of neutron 

 logging and gamma-gamma logging, and will also bring about new 

 methods of gamma -neutron and electron types of logging, which will widen 

 considerably the circle of problems solved with the aid of radioactive logging. 



The possibility of radioactive methods of investigation can also be 

 considerably widened when a powerful controllable neutron source is construc- 

 ted as a small size well-reactor. 



REFERENCES 



1. A. A. Bergman, et al.. Physical Studies (A collection of papers). Izd. Akad. Nauk 



SSSR, (1956). 



2. N. A. Vlasov, et al., Zh. eksp. tear, fiz., (1955). 



3. N. A. Vlasov, Neutrons, Gosteortizdat, (1955). 



4. G. D. Glebova, An investigation of the Kinetics of Absorption of Hydrogen by Barium 



and Other Metals. Candidate thesis, Lenin State Library, (1955). 



5. V. N. Dakhnov, Contemporary Position and the Outlook for Further Development of 



Well Radiometry. Exploration and Conservation of Minerals, No. 6, (1956). 



6. Isotopes in Geology (A collection of papers). Foreign Literature Publishing House, (1954). 



7. E. M. Reikhrudel, G. V. Smirnitskaia, A. I. Borisyenko, Radiotechnics and 



Electronics, No. 12, (1956). 



8. E. Segre, Experimental Nuclear Physics, Vols. I and II, Foreign Literature PubUshing 



House, (1955). 



9. E. M. FiLippov, A Contribution to the Theory of the Gamma-gamma logging Method 



(GGK). Applied Geophysics, No. 18, Gustoptekhisdat, (1957). 

 10. E. M. FiLippov, Gamma-gamma Logging. The Use of Radioactive Isotopes in 

 the Oil Industry. Gostoptekhisdat, 1957. 



