レーザーコンプトン線を用いた二重閉殻核Ca-40の核共鳴蛍光散乱実験

Nuclear resonance fluorescence experiments on doubly closed nucleus Ca-40 by using laser Compton rays

静間 俊行; 早川 岳人; 宇都野 穣   ; 宮本 修治*; 堀川 賢*

Shizuma, Toshiyuki; Hayakawa, Takehito; Utsuno, Yutaka; Miyamoto, Shuji*; Horikawa, Ken*

高い偏光度を持つ準単色レーザーコンプトン線を用いて二重閉殻核Ca-40の核共鳴蛍光散乱実験を行った。高純度ゲルマニウム検出器を用いて共鳴散乱線の測定を行い、励起エネルギー10.3MeVに磁気的双極子励起に基づく準位を観測した。本発表では、Ca-40の核共鳴蛍光散乱実験の結果及び大規模殻模型を用いた磁気双極子遷移強度の計算結果について報告する。

Photon scattering experiments on the doubly closed nucleus Ca-40 were performed using a highly polarized, mono-energetic photon beam from laser Compton scattering. An excited state at an excitation energy of 10.3 MeV based on magnetic dipole excitation was observed from the measurement of scattered radiation with a high pure Ge detector. In this talk, we will report on results of the photon scattering experiment on Ca-40 and calculations of magnetic dipole strengths using large scale shell model.