https://doi.org/10.1140/epjc/s10052-019-7590-x
Regular Article - Experimental Physics
Angular asymmetry of the nuclear interaction probability of high energy particles in short bent crystals
1
CERN, European Organization for Nuclear Research, 1211, Geneva 23, Switzerland
2
Imperial College, London, UK
3
Laboratoire de l’Accélérateur Linéaire (LAL), Université Paris Sud Orsay, Orsay, France
4
Taras Shevchenko National University of Kyiv (TSNUK), Kyiv, Ukraine
5
Joint Institute for Nuclear Research, Joliot-Curie 6, 141980, Dubna, Russia
6
INFN Sezione di Napoli, Complesso Universitario di Monte Sant’Angelo, Via Cintia, 80126, Napoli, Italy
7
INFN Sezione di Roma, Piazzale Aldo Moro 2, 00185, Rome, Italy
8
Petersburg Nuclear Physics Institute in National Research Centre “Kurchatov Institute”, 188300, Gatchina, Russia
* e-mail: marco.garattini@cern.ch
Received:
23
July
2019
Accepted:
23
December
2019
Published online:
11
January
2020
The rate of inelastic nuclear interactions in a short bent silicon crystal was precisely measured for the first time using a 180 GeV/c positive hadron beam produced in the North Experimental Area of the CERN SPS. An angular asymmetry dependence on the crystal orientation in the vicinity of the planar channeling minimum has been observed. For the inspected crystal, this probability is about 
larger than in the amorphous case because of the atomic density increase along the particle trajectories in the angular range of volume reflection, whose dimension is determined by the crystal bending angle. Instead, for the opposite angular orientation with respect to the planar channeling, there is a smaller probability excess of 
.
© The Author(s), 2020
