Presentation Information

10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)

[10a-N107-6]Development of a positron annihilation coincidence Doppler-broadening spectrometer based on anti-coincidence technique

〇Koji Michishio¹, Masato Yamawaki¹, Ryan Smith¹ (1.AIST)

Keywords:

positron annihilation,lattice defect,elemental analysis

Positron annihilation coincidence Doppler-broadening (CDB) spectroscopy is a useful technique for elemental analysis of positron trapping sites in materials. In the conventional bulk measurement, a positron source (²²Na) must be sandwiched between two identical samples, limiting its applicability. In this study, we developed a CDB measurement system compatible with a single sample by applying an anti-coincidence technique for β⁺ rays emitted from the source.

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