Direct Wavelength Measurement of the Visible M1 Transition in Ba7+ with a Novel Calibration Method

Naoki KIMURA; Ryunosuke KODAMA; Kento SUZUKI; Shimpei OISHI; Michiharu WADA; Kunihiro OKADA; Noriaki OHMAE; Hidetoshi KATORI; Nobuyuki NAKAMURA

doi:10.1585/pfr.14.1201021

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Direct Wavelength Measurement of the Visible M1 Transition in Ba⁷⁺with a Novel Calibration Method

Naoki KIMURA, Ryunosuke KODAMA, Kento SUZUKI, Shimpei OISHI, Michiharu WADA, Kunihiro OKADA, Noriaki OHMAE, Hidetoshi KATORI, Nobuyuki NAKAMURA

Author information

Naoki KIMURA
Department of Physics, Sophia University
RIKEN Nishina Center
Ryunosuke KODAMA
Institute for Laser Science, The University of Electro-Communications
Kento SUZUKI
Institute for Laser Science, The University of Electro-Communications
Shimpei OISHI
Institute for Laser Science, The University of Electro-Communications
Michiharu WADA
Wako Nuclear Science Center, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK)
Kunihiro OKADA
Department of Physics, Sophia University
Noriaki OHMAE
Quantum Metrology Laboratory, RIKEN
RIKEN Center for Advanced Photonics
Hidetoshi KATORI
Quantum Metrology Laboratory, RIKEN
RIKEN Center for Advanced Photonics
Department of Applied Physics, The University of Tokyo
Nobuyuki NAKAMURA
Institute for Laser Science, The University of Electro-Communications

Keywords: visible spectroscopy, highly charged ion, electron beam ion trap, calibration

JOURNAL FREE ACCESS

2019 Volume 14 Pages 1201021

DOI https://doi.org/10.1585/pfr.14.1201021

Details

Abstract

We observed and directly measured the M1 transition between the two states of the fine structure splitting in the ground state of Ba⁷⁺with a visible spectrometer coupled to a compact electron beam ion trap. To validate the measurement accuracy, we demonstrated a calibration method using Ar⁺emissions from buffer gas. The wavenumber in vacuum was determined to be 23591.57 (15) cm⁻¹.

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