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レーザーコンプトン$$gamma$$線を用いた鉄領域核の核共鳴蛍光散乱実験

Nuclear resonance fluorescence measurements on iron nuclei by using laser Compton $$gamma$$ rays

静間 俊行; 早川 岳人; 菊澤 信宏 ; 大垣 英明; 豊川 弘之*; 小松原 哲朗*

Shizuma, Toshiyuki; Hayakawa, Takehito; Kikuzawa, Nobuhiro; Ogaki, Hideaki; Toyokawa, Hiroyuki*; Komatsubara, Tetsuro*

高い偏光度を持つ準単色レーザーコンプトン$$gamma$$線を用いて鉄領域核の核共鳴蛍光散乱実験を行った。大容量の高純度ゲルマニウム検出器を用いて共鳴散乱$$gamma$$線を測定した。入射$$gamma$$線の偏光軸と散乱$$gamma$$線の放出角度の相関から遷移の多重極度を決定した。その結果、多数の磁気的双極子励起や電気的双極子励起に基づく準位を観測した。本講演では、測定手法やデータ解析結果について報告する。

Nuclear resonance fluorescence (NRF) measurements on iron nuclei have been carried out by using laser Compton $$gamma$$ rays with high polarization. NRF scattering $$gamma$$ rays were measured by a Ge detector with a relative detection efficiency of 140%. Multi-polarities of the transitions were determined by intensity asymmetry of the transitions with respect to the polarization. Many electric- and magnetic- dipole transitions were observed. The measurement method and the experimental results will be reported.

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