Summary
The experimental data on proton-proton scattering in the energy interval 18÷260 MeV are discussed by using an analytical method and limiting the analysis to the contribution of theS andP states. The polarization data at high energy allow a double set of phase shifts which reproduce the angular distributions in the considered energy interval. The two sets follow from the behaviour of the singletS phase shift, which can either become negative at about 220 MeV or be simply a decreasing function of the energy without assuming negative values. The stability of the solutions thus found against the introduction of the1 D 2 and3 F 2 states is also discussed. Finally, the present results are compared with the solutions already obtained in proton-proton scattering analysis by different Authors.
Riassunto
I dati sperimentali sulla diffusione protone-protone fra 18 e 260 MeV vengono discussi sulla base di un metodo analitico limitando l’analisi al contributo dei soli statiS eP. Usando le misure di polarizzazione alle alte energie viene ottenuto un doppio sistema di fasi che riproducono le sezioni d’urto differenziali nell’intervallo energetico considerato. I due sistemi corrispondono a due diversi andamenti della fase del singolettoS, la quale può annullarsi a circa 220 MeV oppure decrescere con l’energia senza assumere valori negativi. Viene discussa la stabilità delle soluzioni trovate considerando il contributo delle onde relative agli stati1 D 2 e3 F 2. Infine le soluzioni vengono confrontate con quelle date da altri Autori.
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The results of this paper have been reported at theUSSR Conference on high energy particles, Moscow, May 1956.
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Clementel, E., Villi, C. & Jess, L. Phase shift analysis of proton-proton scattering experiments. Nuovo Cim 5, 907–920 (1957). https://doi.org/10.1007/BF02903213
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DOI: https://doi.org/10.1007/BF02903213