# Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (1): 13

• NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH •

### Effects of the phase variation and high order momentum transfer components of NN amplitude on p-4He elastic scattering

I. M. A. Tag-Eldin 1 • M. M. Taha 2 • S. S. A. Hassan 2

1. 1 Nuclear Experimental Physics Department, Nuclear Research Center, Atomic Energy Authority, P.No. 13759, Cairo, Egypt
2 Mathematics and Theoretical Physics Department, Nuclear Research Center, Atomic Energy Authority, P.No. 13759, Cairo, Egypt
• Contact: M. M. Taha E-mail:mahmoudmt@hotmail.com
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I.M.A. Tag-Eldin, M. M. Taha, S.S.A. Hassan. Effects of the phase variation and high order momentum transfer components of NN amplitude on p-4He elastic scattering.Nuclear Science and Techniques, 2018, 29(1): 13
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Abstract:

Elastic scattering differential cross sections for a p-4He system are calculated within the framework of optical limit approximation of the Glauber multiple scattering model. Three different ranges for proton energy (Elab), 19<Elab<50 MeV, 100≤Elab ≤1730 MeV, and 45≤Elab≤393 GeV are considered. It is shown that the Pauli blocking fails to describe the data up to the proton energy, Elab<100 MeV. For higher proton energies, a qualitative agreement is obtained. The observed elastic scattering differential cross section is nicely reproduced in the whole range of scattering angles in the center of mass system up to Hc:m:<200° for 19 <Elab?≤100 MeV when the effect of both the nucleon–nucleon (NN) phase variation parameter cNN and higher-order momentum transfer components (λn; n = 1 and 2) of (NN) elastic scattering amplitude is included. In the range of 200≤Elab ≤1730 MeV, introducing kn plays a significant role in describing the data up to the momentum transfer, q2 ≤1.2 (GeV/c)2. Moreover, it is found that considering only the effect of phase variation parameter, γNN, improved the agreement in the region of minima for elastic scattering differential cross section for 45≤Elab ≤393 GeV. The values of γNN and λn as a function of incident proton energies are presented.