Interferences in resonant excitation of hydrogenic channeled ions

• Published in: Physical review letters Vol. 71; no. 3; pp. 348 - 351
• Main Authors: KRAUSE, H. F, DATZ, S, DITTNER, P. F, JONES, N. L, VANE, C. R
• Format: Journal Article
• Language: English
• Published: Ridge, NY American Physical Society 19-07-1993
• Subjects: 360605 - Materials- Radiation Effects; AMPLITUDES; Atomic and molecular collision processes and interactions; Atomic and molecular physics; ATOMIC NUMBER; CALCULATION METHODS; CARBON IONS; CATIONS; CHANNELING; Channeling phenomena (blocking, energy loss, etc.); CHARGED PARTICLES; COHERENT RADIATION; Condensed matter: structure, mechanical and thermal properties; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CUBIC LATTICES; DATA; DIPOLES; ELECTRIC DIPOLES; ELECTROMAGNETIC RADIATION; Electronic excitation and ionization of atoms (including beam-foil excitation and ionization); ELEMENTS; ENERGY RANGE; ENERGY-LEVEL TRANSITIONS; Exact sciences and technology; EXCITATION; EXPERIMENTAL DATA; FCC LATTICES; Fundamental areas of phenomenology (including applications); HYDROGEN IONS; INFORMATION; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; INTERFERENCE; Interferometers; ION CHANNELING; IONS; MATERIALS SCIENCE; MECHANICS; MEV RANGE; MEV RANGE 01-10; MONTE CARLO METHOD; MULTIPOLES; NITROGEN IONS; NUMERICAL DATA; Optical instruments, equipment and techniques; Optics; Physics; POTASSIUM IONS; QUANTUM MECHANICS; Quantum optics; RADIATIONS; RESONANCE; Scattering of atoms, molecules and ions; SELECTION RULES; SEMIMETALS; SILICON; Strong-field excitation of optical transitions in quantum systems; multi-photon processes; dynamic stark shift; Structure of solids and liquids; crystallography; Transition probabilities; Selection rules; H-like ions; Diamond lattices; Ion channeling; Interference; Resonance; Silicon; Excitation; Experimental study
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.71.348

We have observed selection rules for the resonant excitation of swift hydrogenlike ions ([ital Z]=6,7) axially channeled in the [l angle]111[r angle] direction of a diamond lattice (silicon). The resonant excitation arises from a coherent periodic perturbation by the atoms in the bounding crystal rows. We show that the selection rules are the consequence of destructive and constructive interference in the quantum mechanical transition amplitude for excitation.