Investigation of M1 transitions of the ground-state configuration of In-like tungsten

Three visible lines of M1 transitions from In-like tungsten were recorded using the Shanghai Permanent Magnet Electron Beam Ion Trap. The experimental wavelengths were measured as 493.84 +/- 0.15, 226.97 +/- 0.13 and 587.63 +/- 0.23 nm (vacuum wavelengths). These results are in good agreement with theoretical predictions obtained using the large-scale relativistic manybody perturbation theory, in the form of the flexible atomic code.