Silicon tracker for cluster-knockout reactions at intermediate energies.

The cluster-knockout reaction project, ONOKORO, has been launched to elucidate the formation mechanism of clusters in atomic nuclei. For the inverse-kinetics cluster-knockout reaction experiments, a new detector array is under development to measure energies and angles of light ions emitted in the reactions. The silicon tracker tracks the particles with good angular and energy-loss resolutions. A performance test of the silicon strip detectors with a thickness of 100 μ m and a strip width of 100 μ m was performed using prototype silicon detectors. The mono-energetic proton and α -particle beams were irradiated on the silicon detectors. The energy-loss spectra in silicon detectors showed a good signal-to-noise ratio. The threshold level for signal detection is seven sigma of noise level. Their dynamic ranges were optimized wide enough to detect charge number Z = 1 and Z = 2 ions emitted in the cluster-knockout reactions. [ABSTRACT FROM AUTHOR]