EVALUATION OF EXTERNAL MAGNETIC FIELD CORRECTION COIL FOR MEASUREMENT OF HYPERFINE STRUCTURE SPLITTINGS OF Rb ATOMS IN SUPERFULID HELIUM IN ACCELARATOR EXPERIMENTS

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  • 加速器実験における超流動ヘリウム中Rb原子の超微細構造間隔測定のための外部磁場補正コイルの検証

Abstract

We have been developing a laser spectroscopic technique called OROCHI to study nuclear structure of low production yield unstable atom. In OROCHI, the energetic beams generated at an accelerator are stopped in superfluid helium (He II) with high efficiency (～100%). This method enables measurement of Zeeman level to determine the nuclear spins and hyperfine structure level to determine nuclear electromagnetic moments using laser radio wave/microwave double resonance method. In this study, we focused on the effect of the external magnetic field on the atoms, which is one of the causes limiting the accuracy of the measurement. By introducing an external magnetic field correction coil, we aim to measure the hyperfine structure splitting of unstable ^84Rb atoms with high precision that enables the derivation of hyperfine anomaly in the future.

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