Molecular beam spectroscopy

Japanese: 分子線分光学 - ぶんしせんぶんこうがく(英語表記)molecular beam spectroscopy
Molecular beam spectroscopy
A branch of spectroscopy that studies atoms and molecules in molecular beams. The characteristics of molecular beams vary depending on how they are generated, but the atoms and molecules in them have consistent flow direction, speed, electronic state, and, in the case of molecules, vibrational-rotational state. Molecular beam spectroscopy has a long history, but it has recently entered a new stage of development with the application of supersonic molecular beams to laser spectroscopy. In 1922, O. Stern and Walther Gerlach famously discovered that a silver atomic beam split into two directions when passed through an inhomogeneous magnetic field, experimentally proving the existence of electron spin.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
分子線中にある原子や分子を研究する分光学の一分野。分子線の特徴は,その生成方法によっても異なるが,その中の原子や分子は,流れの方向や速さ,電子状態,また分子の場合には振動回転状態などがそろっていることである。 分子線分光学の歴史は古いが,最近の超音速分子線supersonic molecular beamのレーザー分光法への応用によって新たな発展段階に入ってきた。1922年にO.シュテルンとゲルラハWalther Gerlachは,銀原子線を不均一磁場に通すと2方向に分かれることを発見し,これが電子スピンの存在を実験的に証明したことは有名である。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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