title: Observation of a Rydberg series in H+H-: a heavy Bohr atom.
abstract: 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=140 to 230. The system is made heavy by replacing an electron inside a hydrogen atom by a composite H- particle, thus forming a H+H- Coulombically bound system obeying the physical laws of a generalized atom with appropriate mass scaling.
authors.affiliation: Laser Centre, Vrije Universiteit, De Boelelaan 1081, Amsterdam, The Netherlands.
authors.forename: M O
authors.initials: MO
authors.lastname: Vieitez
authors.forename: T I
authors.initials: TI
authors.lastname: Ivanov
authors.forename: E
authors.initials: E
authors.lastname: Reinhold
authors.forename: C A
authors.initials: CA
authors.lastname: de Lange
authors.forename: W
authors.initials: W
authors.lastname: Ubachs