Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1831100 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2007 | 5 Pages |
Abstract
We have studied low-velocity Kr ion responses of nuclear emulsions for the possibility of tracking Ag and Br recoils from galactic dark matter particles. Tracks of 680–1180 km/s Kr ions have been observed in a 40 nm-sized AgBr grain emulsion with scanning electron microscopy. The tracks have a linear energy-dependency in range, angles biased along the incident direction, and a high developed-grain number density with respect to expected electronic stopping. We find that the fine grain emulsion is sensitive enough to low-velocity heavy ions whose energy losses are mainly governed by nuclear stopping.
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Authors
M. Natsume, K. Hoshino, K. Kuwabara, M. Nakamura, T. Nakano, K. Niwa, O. Sato, T. Tani, T. Toshito,