High-precision R-branch transition frequencies in the ν2 fundamental band of H3+

摘要: Abstract The H 3 + molecular ion has served as a long-standing benchmark for state-of-the-art ab initio calculations of potentials and variational rovibrational energy levels. However, the accuracy such would not have been confirmed if wealth spectroscopic data that made available this molecule. Recently, new high-precision spectroscopy technique was demonstrated by Hodges et al., which led to first highly accurate precise (∼MHz) transition frequencies. As an extension work, we present ten additional R-branch transitions measured similar precision next step toward ultimate goal producing comprehensive survey molecule, from levels can be calculated.