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陽電子消滅測定手法と高分子などの材料研究への応用

Positron annihilation methods and applied researches for materials such as polymers

平出 哲也  

Hirade, Tetsuya

陽電子は電子の反粒子であり電子と対消滅し質量に相当するエネルギーを$$gamma$$線として放出する。この$$gamma$$線を計測する手法を陽電子消滅法と呼ぶ。その時刻情報、エネルギー情報、放出角度の情報はいろいろな材料研究に用いられてきた。ここでは、陽電子消滅法の中でも、消滅寿命、消滅$$gamma$$線ドップラー拡がり、消滅寿命-運動量相関を主に取り上げ、金属材料や高分子材料に関する研究例を挙げながら解説する。

A positron, an anti-particle of an electron, annihilates with an electron and emits energy that is proportional to mass energy as annihilation $$gamma$$-rays. Positron annihilation methods are applied by detecting these $$gamma$$-rays. The information of annihilation time, energy of $$gamma$$-rays, and direction of $$gamma$$-rays emission has been used for materials science. Here, positron annihilation lifetime, doppler broadening of annihilation $$gamma$$-rays and positron annihilation age-momentum correlation are mainly explained by use of research examples for metals and polymers, etc.

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