Observation of a Rydberg Series inH+H−: A Heavy Bohr Atom

M. O. Vieitez, T. I. Ivanov, E. Reinhold, C. A. de Lange, W. Ubachs
2008 Physical Review Letters  
We report on the realization of a heavy "Bohr atom," through the spectroscopic observation of a Rydberg series of bound quantum states at principal quantum numbers n ¼ 140 to 230. The system is made heavy by replacing an electron inside a hydrogen atom by a composite H À particle, thus forming a H þ H À Coulombically bound system obeying the physical laws of a generalized atom with appropriate mass scaling.
doi:10.1103/physrevlett.101.163001 pmid:18999662 fatcat:snphz6yilndk3i2kqta2i76gum