Position-sensitive photon detector GRAPE

  • 1.5 Quantum interdisciplinary sciences(Life science, Mathematics, Particle physics, Space science, Astronomy, Quantum gravity, etc.)
  • 2.2 Quantum sensing(Quantum metrology/Sensing/Imaging, Optical lattice clocks)
Nobuaki Imai
Graduate School of Science
Associate Professor
By implementing position sensitivity in 18 germanium detectors, the Doppler shift of de-excitation gamma rays emitted from moving ions can be compensated, which enables the determination of the energy of the gamma rays in the rest frame. The quantum shape of the atomic nuclei can be revealed by measuring the characteristics of the de-excitation gamma rays.
Array of the position-sensitive germanium detectors, referred to as GRAPE
Center for Nuclear Study, Univ. of Tokyo
Digital signal processor and GRAPE
Center for Nuclear Study, Univ. of Tokyo

Related links

Research collaborators

Prof. Daiki Nishimura (Tokyo City University)

Related publications

  • S.Shimoura, Nucl. instrum. Methods A 525 (2004) 188.
  • S. Ota et al., Phys. Lett. B 666, 311 (2008).
  • M. Niikura et al., Eur. Phys. J. A42, 471 (2009).


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