Proton elastic scattering and proton induced γ-ray emission cross-sections on Na from 2 to 5 MeV

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:266

Article; Proceedings Paper

Caciolli, A.^1,2  Calzolai, G.^1,2  Chiari, M.^1,2  Climent-Font, A.³  Garcia, G.³  Lucarelli, F.^1,2  Nava, S.^1,2 

[1] Univ Florence, Dept Phys, I-50019 Florence, Italy

[2] Ist Nazl Fis Nucl, I-50019 Florence, Italy

[3] Univ Autonoma Madrid, CMAM, Madrid, Spain

关键词: cross-sections;    elastic scattering;    PIGE;    proton;    sodium;   

DOI  :  10.1016/j.nimb.2007.11.025

来源: Elsevier

【 摘 要 】

Differential cross-sections for proton elastic scattering on sodium and for gamma-ray emission from the reactions Na-23(p,p'gamma)Na-23 (E-gamma = 440 keV and E-gamma = 1636 keV) and Na-23(p,alpha'gamma)Ne-20 (E-gamma = 1634 keV) were measured for proton energies from 2.2 to 5.2 MeV using a 63 mu g/cm(2) NaBr target evaporated on a self-supporting thin C film. The gamma-rays were detected by a 38% relative efficiency Ge detector placed at an angle of 135 degrees with respect to the beam direction, while the backscattered protons were collected by a Si surface barrier detector placed at a scattering angle of 150 degrees. Absolute differential cross-sections were obtained with an overall uncertainty estimated to be better than +/- 6.0% for elastic scattering and +/- 12% for gamma-ray emission, at all the beam energies. To provide a convincing test of the overall validity of the measured elastic scattering cross-section, thick target benchmark experiments at several proton energies are presented. (c) 2007 Elsevier B.V. All rights reserved.

【 授权许可】

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