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arXiv 0712.0858physics.acc-phphysics.class-ph
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弯曲晶体中相对论粒子的体反射和折射

Volume Reflection and Refraction of Relativistic Particles in Bent Crystals

Gennady V. Kovalev

摘要:

本文用经典偏转函数研究了正、负相对论粒子在弯曲晶体中的准沟道现象。结果表明,势散射在一个有界的环状势的中心领域可能会产生散射粒子的“反射”和“折射”的分数。对于带正电荷的粒子,主要呈现“反射”部分;同时,我们预测,对于带负电荷的粒子,“折射”部分应该占主导地位。还讨论了“空核”对中心散射的影响。根据晶体的势模型,导出了体积“反射”和“折射”的平均偏转角。计算的平均"反射“角与最近的实验数据\cite{ivanov_2006}符合得令人满意

英文摘要:

The quasi-channeling of positive and negative relativistic particles in a bent crystal is studied using the classical deflection function. It was shown that the potential scattering in a central field of bounded ring-like potentials may produce the ``reflected'' and ``refracted'' fractions of scattered particles. For particles with positive charge the ``reflected'' fraction is mainly presented; at the same time we predict that for particles with negative charge the ``refracted'' fraction should dominate. The effect of ``empty core'' for central scattering is also discussed. The average deflection angles for volume ``reflection'' and ``refraction'' are derived for accepted potential model of the crystal. The calculated average ``reflection'' angle is in satisfactory agreement with recent experimental data \cite{ivanov_2006}

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