Elsevier

Physics Letters B

Volume 681, Issue 3, 2 November 2009, Pages 233-236
Physics Letters B

Observation of channeling and volume reflection in bent crystals for high-energy negative particles

https://doi.org/10.1016/j.physletb.2009.10.024Get rights and content
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Abstract

Deflection due to planar channeling and volume reflection in short bent silicon crystals was observed for the first time for 150 GeV/c negative particles, π mesons, at one of the secondary beams of the CERN SPS. The deflection efficiency was about 30% for channeling and higher than 80% for volume reflection. Volume reflection occurs, in spite of the attractive character of the forces acting between the particles and the crystal planes, in a wide angular range of the crystal orientations determined by the crystal bend angle.

PACS

61.85.+p

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