structure obtained from quasifree scattering从准自由散射得到的晕核结构课件.pptVIP

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structure obtained from quasifree scattering从准自由散射得到的晕核结构课件.ppt

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structure obtained from quasifree scattering从准自由散射得到的晕核结构课件

Quasi-free scattering with exotic nuclei Quasi-free scattering. Cross section Impulse approximation. How good it is? (p,2p). Separation energies, widths and angular momentum assignment. Distorted momentum distributions of the knocked out particle. Spectroscopic factors. Experiment in comparison with the Independent-Particle Model and Large-Basis Shell Model. Conventional and inverse kinematics.Momentum transfer. The task is the investigation of 8He structure by quasi-free scattering on protons. Experiment with 4He, 6He and 8He beams. Liquid hydrogen target and 4He, 6He, 8He beams. Cross section. Impulse approximation. Internal momentum distribution of clusters. Test case: 6He beam – neutron and 4He knock out. 8He. Neutron knockout, 4He knockout, and ??? knockout ??? 6He knocked out from 8He. 8He. Summary Prototype Experiment in Inverse Kinematics with LAND/ALADIN: 12C(p,2p)11B – Sep/Oct 2007 Conventional and inverse kinematics 12C(p,2p). Some simulations. Summary Experiments with stable beams Proton beams Extremely high beam intensities Very small angular acceptance Perfect angular and energy resolution Experiments with radioactive beams Radioactive beams and inverse kinematics Low beam intensities Extremely large angular acceptance * . collaboration meeting R3B/EXL L.V. Chulkov October 16 2007 Owen Chamberlain, Emilio Segre, Berkeley, Li(p,2p), 350 MeV, 1952 M. Yosoi et al., Phys. Let. B 551, 255 (2003). M. Yosoi, PhD Thesis, 2003, Kyoto University Study of deep-hole states (s1/2) DWIA: spectroscopic factor free n-n cross-section distorted proton momentum distribution spectroscopic factor free NN cross section kinematical factor distorted momentum distribution Three particles in the final state: + 9 kinematical variables. Momentum and energy conservation: - 4 kinematical variables. Cross section generally depends on 9-4=5 variables. Feynman diagram for quasi-fr