shape resonance


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shape resonance

[′Shāp ‚rez·ən·əns]
(quantum mechanics)
A broad resonance or peak in the cross section of a scattering process that reflects the shape of the potential between projectile and target; this shape consists typically of a barrier separating an inner deep well from a shallow, asymptotically vanishing potential at large separation distances.
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References in periodicals archive ?
The above is in contrast to the case of [Rb.sup.87] where a d-wave shape resonance dominates the spectrum obtained from samples of doubly polarized atoms (28).
There is observed a shape resonance in lamellar metallic gratings when frequency w of optical light in the visible to near-infrared range coincides with resonance frequency of dipole [[omega].sub.0] in metal's skin because the dielectric response is given by
In these papers, they presented a new and very original approach to investigation of the excitation processes of electromagnetic surface shape resonances in lamellar metallic gratings by light, from the visible to near-infrared scale, based on the surface plasmon-polaritons, where they first argued that the smooth metal-air interface should be regarded as a distinct dielectric medium, the skin of the metal.