Summary
The use of nuclear emulsions as an analyser of proton polarization at an energy of 150 MeV has been studied experimentally by two different methods of scanning. An analyzing power of +0.47±0.08 was obtained for scattering angles of 5°÷20°. As an application of the emulsion method, we measured the excitation function of the reaction γ+d→n+p from 150 to 300 MeV, and the polarization of protons produced by photons ofE γ=(250±40) MeV. The most likely value of the polarization was determined to be +0.27 +0.16−0.18 at 45° c.m. angle.
Riassunto
Si è studiato sperimentalmente con due diversi metodi di scanning l’uso delle emulsioni nucleari come analizzatori della polarizzazione dei protoni ad un’energia di 150 MeV. Si è ottenuto un potere analizzante di +0.47±0.08 per angoli di scattering di (5÷20)°. Come applicazione del metodo abbiamo misurato la funzione di eccitazione della reazione γ+d→n+p fra 150 e 300 MeV e la polarizzazione di protoni prodotti da fotoni diE γ=(250±40) MeV. Si è stabilito che il valore più probabile della polarizzazione è +0.25 +0.16−0.18 ad un angolo di 45° s.c.m.
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Work supported in part by the United States Atomic Energy Commission, through funds provided by the AEC, ONR and AFOSR.
Traduzione a cura della Redazione.
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Feld, B.T., Maglić, B.C. & Parks, J. Use of nuclear emulsions as an analyser of proton polarization: Application to the polarization of protons in the photodisintegration of the deuteron. Nuovo Cim 17 (Suppl 2), 241–252 (1960). https://doi.org/10.1007/BF02911228
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DOI: https://doi.org/10.1007/BF02911228