Complementary Characterization of Radioactivity Produced by Repetitive Laser-Driven Proton Beam Using Shot-to-Shot Proton Spectral Measurement and Direct Activation Measurement

概要

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The precision of the time-of-flight method for measuring proton spectra is confirmed by the activation method using a 7Li(p,n)7Be nuclear reaction. The proton beam driven by a repetitive high-intensity laser is utilized to induce the nuclear reaction. The activity measured by direct gamma-ray measurement after 1912 proton beam shots at 1 Hz is 1.7\pm 0.2 Bq. This is in accordance with the activity of 1.6\pm 0.2 Bq obtained from the shot-to-shot proton energy distribution measured using the time-of-flight detector.
2012-04-25