Kohärente Kleinwinkelstreuung hochenergetischer Pi-Mesonen an leichten Kernen ( 3He und 4 He)

1970 ◽  
Vol 25 (6) ◽  
pp. 853-862
Author(s):  
Hans Baier
Keyword(s):  
Angular Distribution ◽  
Elastic Scattering ◽  
Small Angle ◽  
Scattering Amplitude ◽  
High Energy ◽  
Concise Report ◽  
Present Context ◽  
Pion Nucleon ◽  
Energy Processes ◽  
Theoretical Results

Abstract The paper discusses recently obtained (theoretical) results on the coherent small angle elastic scattering of high energy pions on the nuclei 3 He and 4 He. Starting with the full suitably parametrized spin- and isospindependent pion-nucleon amplitude for pion laboratory energies between 0.826 and 2.01 GeV the Glauber’s plural scattering formula has been applied to derive the angular distribution of scattered pions. A concise report on the use of coherent high energy processes in the investigation of the nuclear structure and the hadron-nucleon scattering amplitude is given. The advantages and shortcomings as well as possible generalizations of the plural scattering model are outlined. The formalism applied to derive results on the structure of 3 He and 4 He and the conclusions drawn from the results on pion-helium scattering are presented in detail. It has been shown that an effective pion nucleon amplitude may safely replace the full amplitude in the present context and in the energy region mentioned above.

An experimental investigation of small angle photon elastic scattering

1979 ◽  
Vol 57 (3) ◽  
pp. 343-352 ◽  
Author(s):  
N. Ramanathan ◽  
T. J. Kennett ◽  
W. V. Prestwich
Keyword(s):  
Experimental Investigation ◽  
Elastic Scattering ◽  
Cross Sections ◽  
Small Angle ◽  
Differential Cross ◽  
Bound States ◽  
Scattering Amplitude ◽  
Form Factors ◽  
Differential Cross Sections

The differential cross sections for photon elastic scattering have been determined for targets of Cu, Cd, Ta, and Pb, at angles of 2.4, 3.5, 5.1., 6.0, 8.0, and 10.0° and incident energies of 244.7, 344.3, 443.9, 778.9, 964.0, 1085.8, 1112.0, 1274.2, and 1408.0 keV. The data indicate that presently calculated form factors may be too large, and suggest that intermediate bound states may influence the scattering amplitude.

Small-angle elastic scattering of high-energy electrons byH2, HD, andD2

1994 ◽  
Vol 49 (2) ◽  
pp. 965-968 ◽  
Author(s):  
Jacek Komasa ◽  
Ajit J. Thakkar
Keyword(s):  
Elastic Scattering ◽  
Small Angle ◽  
High Energy ◽  
High Energy Electrons

A modified approach to Glauber approximation for particle-atom collisions

1977 ◽  
Vol 353 (1672) ◽  
pp. 11-34 ◽  
Keyword(s):  
Angular Momentum ◽  
Excitation Energy ◽  
Small Angle ◽  
Phase Function ◽  
Scattering Amplitude ◽  
High Energy ◽  
Mean Excitation Energy ◽  
Intermediate States ◽  
Higher Order Terms ◽  
The Mean

In the present approach a multi-angular-momentum expansion of each order of the exact scattering amplitude is developed. Introducing the usual high energy, small angle approximation, but retaining a finite value for the mean excitation energy of the atom in its intermediate states, one obtains a new expression for the amplitude. It resembles the Glauber amplitude in character, but most of the well known shortcomings of the conventional Glauber amplitude are absent. It is also indicated how to include higher order terms in the phase function of the S -matrix.

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