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Photoneutron production from the proton at high energy

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Il Nuovo Cimento A (1965-1970)

Summary

The total neutron yield from the (γ, n) reaction in hydrogen has been measured as a function of the energy of the primary electron using the bremsstrahlung beam from the Orsay Linear Electron Accelerator. The yield has been interpreted as a contribution from single and double pion photoproduction in hydrogen. Close to threshold the results are consistent with the theoretical prediction of CGLN for single pion photoproduction. In the energy region (250÷450) MeV the results are consistent with the experimentally measured values of the total positivepion photoproduction cross-section. At higher energies the results indicate a higher yield than previously anticipated for double pion photoproduction in the particular channel γ+p→n+π+0.

Riassunto

Si è misurata la resa totale di neutroni della reazione (γ, n) in idrogeno in funzione dell'energia del protone primario facendo uso del fascio di bremsstrahlung dell'Acceleratore lineare di elettroni di Orsay. La resa è stata interpretata come il contributo della fotoproduzione singola e doppia di pioni in idrogeno. Vicino alla soglia i risultati sono concordanti con la predizione teorica di GGLN per la fotoproduzione singola di pioni. Nell'intervallo di energia (250÷450) MeV i risultati concordano con i valori della sezione d'urto per la fotoproduzione di pioni positivi misurati sperimentalmente. Ad energie maggiori i risultati indicano una resa maggiore di quella prevista per la fotoproduzione doppia di pioni nel particolare canale γ+p→n+π+0.

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References

  1. J. Halpern, A. K. Mann andR. Nathans:Rev. Sci. Instr.,23, 678 (1952).

    Article  ADS  Google Scholar 

  2. G. Ascoli, G. L. Goldwasser, U. E. Kruse, J. Simpson andW. P. Swanson:Proceedings of the Sienna Conference, vol.1 (1964), p. 485.

    Google Scholar 

  3. G. R. Bishop, S. Costa, S. Ferroni, R. Malvano andG. Ricco:Nuovo Cimento,42 B, 157 (1966).

    ADS  Google Scholar 

  4. A. Maggiolo andG. Ricco:Monte Carlo calculations for a fast neutron counter, INFN/BE-64/2 (1964); In performing the calculation the authors have taken into account the following processes: elastic scattering on C and H; inelastic scattering; (n,2n) reactions and neutron capture;L. Palmieri andG. Ricco:Nucl. Instr. and Meth.,33, 120 (1965).

    Article  ADS  Google Scholar 

  5. G. C. Bonazzola andS. Costa:Nucl. Instr. and Meth.,28, 274 (1964).

    Article  ADS  Google Scholar 

  6. S. Costa andS. Ferroni:Nucl. Instr. and Meth.,17, 145 (1962).

    Article  ADS  Google Scholar 

  7. G. G. Källén:Elementary Particle Physics.

  8. J. M. Sellen, G. Cocconi, V. T. Cocconi andE. L. Hart:Phys. Rev.,113, 1323 (1959);B. M. Chasan, G. Cocconi, V. T. Cocconi andR. M. Schectman:Phys. Rev.,119, 811 (1960).

    Article  ADS  Google Scholar 

  9. J. V. Allaby, H. L. Lynch andD. M. Ritson:Phys. Rev.,142, 887 (1966).

    Article  ADS  Google Scholar 

  10. S. Ozaki, R. Weinstein, G. Glass, E. Loh, L. Neimala andA. Wattenberg:Phys. Rev. Lett.,4, 533 (1960).

    Article  ADS  Google Scholar 

  11. G. Campos Venuti andG. Matthiae: Report Istituto Superiore di Sanità ISS 62/21 (1962).

  12. P. Ammiraju andL. D. Ledermann:Nuovo Cimento,4, 281 (1956).

    Article  Google Scholar 

  13. J. O'Connell, P. Dyal andJ. Goldenberg:Phys. Rev.,116, 173 (1959).

    Article  ADS  Google Scholar 

  14. H. Anderson,et al.: E.F.I.N.S. 73-56.

  15. F. Chew, M. L. Goldberger, F. Low andY. Nambu:Phys. Rev.,106, 1345 (1957).

    Article  ADS  MathSciNet  Google Scholar 

  16. C. S. Robinson: Tables of cross-sections for π+ photoproduction according to the theory of CGLN, University of Illinois (1959).

  17. M. Bloch andM. Sands:Phys. Rev.,108, 1101 (1957);113, 305 (1959).

    Article  ADS  Google Scholar 

  18. R. M. Friedman andK. M. Crowe:Phys. Rev.,105, 1369 (1957).

    Article  ADS  Google Scholar 

  19. A. Kusumegi, Y. Kobayashi, Y. Murata, H. Sasaki, K. Takamatsu andA. Masaike:Proceedings of the International Symposium on Electron and Photon Interactions at High Energies, vol.2 (Hamburg, 1965), p. 253.

    Google Scholar 

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Costa, S., Ferroni, S., Gracco, V.G. et al. Photoneutron production from the proton at high energy. Nuovo Cimento A (1965-1970) 45, 696–705 (1966). https://doi.org/10.1007/BF02721135

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  • DOI: https://doi.org/10.1007/BF02721135

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