Speaker
Dr
Jiro Kawada
(Bern University)
Description
This work aims at collecting experimental data on low energy antiproton-nucleus annihilation - especially on nuclear fragmentation - by using emulsion detectors.
In spite of their importance in many fields such as nuclear physics, astronomy and radiology, the properties of stopping antiprotons, in particular the energy distributions, the multiplicities and the particle types emitted by the annihilation on nuclei are not well known.
In the AEgIS experiment (AD6) at CERN (designed to measure the gravitational acceleration of antihydrogen) we exposed several thin targets (Al, Si, Ti, Cu, Ag, Au and Pb) to antiprotons with mean kinetic energies of 100 keV, which were obtained by degrading the extracted beam from the Antiproton Decelerator.
Emulsion detectors have excellent position resolutions (of the order of 1 micron) to detect the nuclear fragments one by one, and the ability to distinguish between highly ionizing particles, such as nuclear fragments or protons,
and other annihilation products products, such as pions and kaons.
This talk will present the results of our nuclear fragmentation study and offer a comparison with simulation models.
Available reference: arxiv.org/abs/1306.5602
Primary author
Dr
Jiro Kawada
(Bern University)
