Direct Wavelength Measurement of the Visible M1 Transition in Ba7+ with a Novel Calibration Method Kimura, Naoki ; Kodama, Ryunosuke ; Suzuki, Kento ; Oishi, Shimpei ; Wada, Michiharu ; Okada, Kunihiro ; Ohmae, Noriaki ; Katori, Hidetoshi ; Nakamura, Nobuyuki Abstract Publication: Plasma and Fusion Research Pub Date: January 2019 DOI: 10.1585/pfr.14.1201021 Bibcode: 2019PFR....1401021K