Polarization in quasielastic (p,2p) scattering on a 4He nucleus at 1 GeV |
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| Authors: | O V Miklukho G M Amalsky V A Andreev S L Belostotsky D O Veretennikov Yu V Elkin A A Zhdanov A A Izotov A Yu Kiselev A I Kovalev L M Kochenda M P Levchenko T Noro A N Prokofiev D A Prokofiev H Sakaguchi V Yu Trautman V A Trofimov S I Trush O Ya Fedorov K Hatanaka A V Shvedchikov |
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| Institution: | (1) Research Center for Nuclear Physics, Osaka University, Ibaraki 567-0047, Japan;(2) Petersburg Nuclear Physics Institute, Russian Academy Sciences, Gatchina, 188350, Russia |
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| Abstract: | The polarization of secondary protons from the (p, 2p) reaction induced by 1-GeV protons incident to a 4He nucleus was measured in a kinematically complete experiment. By using a two-arm magnetic spectrometer, two secondary protons from this reaction were recorded in coincidence at unequal scattering angles of Θ1 = 18°?24.21° and Θ2 = 53.22° over a broad range of the recoil-nucleus momentum K B between 0 and 150 MeV/c. It was found that the measured polarization of either secondary proton is less than that observed in free elastic proton-proton scattering. The magnitude of this difference is determined by the mean binding energy of s-shell protons rather than by the effective nuclear density. The polarizations measured in inclusive quasielastic and elastic scattering of 1-GeV protons on 4He nuclei are presented for scattering angles in the range Θ1 = 18° ? 24.21°. |
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