Lifetimes of two-photon-emitting states in heliumlike and hydrogenlike nickel

Journal Article · Mon Jun 12 00:00:00 EDT 1989 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.62.2809· OSTI ID:5898496

Dunford, R W; Hass, M; Bakke, E; Berry, H G; Liu, C J; Raphaelian, M L. A.; Curtis, L J

We report measurements of the lifetimes of the 2/sup 1/S/sub 0/ state of heliumlike Ni/sup 26 +/ and the 2/sup 2/S/sub 1/2/ state of hydrogenlike Ni/sup 27 +/, both of which decay predominantly by two-photon emission. Our method differs from previous measurements of the lifetimes of similar states in that we require a coincidence between the two photons. Our lifetime of 217.1(1.8) ps for the hydrogenlike decay is in agreement with the theoretical value of 215.45 ps. The heliumlike decay lifetime of 156.1(1.6) ps is in fair agreement with the theoretical value of 154.3(0.5) ps.

• Research Organization: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439(US); Department of Physics and Astronomy, University of Toledo, Toledo, Ohio 43606
• DOE Contract Number: FG05-88ER13958
• OSTI ID: 5898496
• Journal Information: Phys. Rev. Lett.; (United States), Vol. 62:24
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
NICKEL IONS
LIFETIME
CATIONS
EMISSION SPECTRA
S STATES
CHARGED PARTICLES
ENERGY LEVELS
IONS
SPECTRA
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory