Zobrazeno 1 - 10
of 45
pro vyhledávání: '"G. T. Trammell"'
Autor:
J. P. Hannon, G. T. Trammell
Publikováno v:
Hyperfine Interactions. :127-274
With the advent of high brightness synchrotron radiation sources, an important new field has been opened up involving coherent nuclear excitations induced by synchrotron radiation pulses traversing a piece of matter. We review the theory of coherent
Publikováno v:
Physical Review Letters. 72:832-835
The interference of the directly emitted photoelectron wave and the wave scattered coherently by neighboring atoms gives holographic fringes in the photoelectron emission intensity $I(\hat{\bf R})$. In the electron emission holography technique in su
Publikováno v:
Journal of Applied Physics. 73:6183-6185
In the recently developed technique of electron emission holography, the sources are electron emitting atoms, adsorbed on the surface or part of the substrate. The directly emitted electron serves as a reference wave and its interference with the ela
Publikováno v:
Physical review letters. 71(2)
We show that, in the fast collision approximation, the scattering operator for resonant x-ray scattering can be expressed in terms of simple spin-orbital moment operators ${\mathit{M}}^{(\mathit{k})}$(l,s) of the valence shell involved in the resonan
Autor:
G. T. Trammell, J. P. Hannon
Publikováno v:
Physical Review B. 18:165-172
Synchrotron pulses will excite low-lying nuclear levels whose subsequent decay will exhibit beats with frequencies equal to the nuclear hyperfine splittings. The highly collimated pulses incident on very small enriched single crystals at a Bragg angl
Autor:
G T Trammell, P M Levy
Publikováno v:
Journal of Physics C: Solid State Physics. 10:1303-1310
The authors estimate the cross section for the magnetic octupole scattering of neutrons by rare-earth ions. These scattering events can change the magnetic quantum number of the ions by up to three units. For high momentum transfers and a proper scat
Publikováno v:
Le Journal de Physique Colloques. 47:C6-299
The kinetic behavior of a gamma-ray laser is comprised of an array of isomeric nuclei located at regular lattice sites in a perfect single crystal of dimensions and structure so chosen as to favor anomalous emission into that Borrmann mode having the
Publikováno v:
Physical Review A. 37:4280-4285
We have previously shown that two-beam Borrmann modes of good single Moessbauer crystals offer the possibility of achieving nuclear lasing at population-inversion densities substantially lower than would be required in an amorphous sample of the same
Publikováno v:
Physical Review B. 32:6374-6384
Publikováno v:
Physical Review A. 37:4269-4279
Multibeam Borrmann modes of single crystals exist in which in addition to the electric field being zero, the magnetic field and/or higher derivatives of the field (the electric field gradient, the magnetic field gradient, ...) are also zero at the eq