title: Photon-trap spectroscopy of mass-selected ions in an ion trap: optical absorption and magneto-optical effects.
abstract: A novel experimental technique has been developed to observe a trace of optical absorption of free mass-selected ions. The technique combines a linear radio-frequency ion trap with a high-finesse optical cavity to perform cavity ring-down spectroscopy (photon-trap spectroscopy for generality), where the storage lifetime of photons in the cavity provides a sensitivity high enough to probe the trapped ions. Absorption spectra of the manganese ion Mn(+) are presented, showing hyperfine structures for the (7)P(2,3,4)<--(7)S(3) transitions in the ultraviolet range. Implementation of a solenoidal magnet allows us to observe the Zeeman splitting and the Faraday rotation as well.
authors.affiliation: Cluster Research Laboratory, Toyota Technological Institute in East Tokyo Laboratory, Genesis Research Institute, Inc., 717-86 Futamata, Ichikawa, Chiba 272-0001, Japan. terasaki@clusterlab.jp
authors.forename: Akira
authors.initials: A
authors.lastname: Terasaki
authors.forename: Takuya
authors.initials: T
authors.lastname: Majima
authors.forename: Tamotsu
authors.initials: T
authors.lastname: Kondow
mesh_terms: D007477:Ions / Q000737:chemistry; D008280:Magnetics; D008345:Manganese / Q000737:chemistry*; D013058:Mass Spectrometry / Q000295:instrumentation* / Q000379:methods*; D055095:Optics and Photonics; D017785:Photons; D013056:Spectrophotometry, Ultraviolet / Q000295:instrumentation / Q000379:methods
chemical_list: D007477:Ions; D008345:Manganese