We report the results of first photoemission spectroscopy on a newly discovered noncentrosymmetric superconductor Mg 10Ir 19B 16. We measured the valence band structure of Mg 10Ir 19B 16 using soft X-ray photoemission technique and found that the first principal calculation explains our observation well. In the bulk-sensitive laser-excited photoemission study, we observed that the intensity at the Fermi level decreases as we lower the sample temperature, indicative of the opening of superconducting energy gap. Using Dynes' function, we performed fitting analysis on the spectra of superconducting state.
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