doublet

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doublet

1. Physics
a. a multiplet that has two members
b. a closely spaced pair of related spectral lines
2. two dice each showing the same number of spots on one throw
3. Physics two simple lenses designed to be used together, the optical distortion in one being balanced by that in the other

doublet

[′dəb·lət]
(atomic physics)
Two stationary states which have the same orbital and spin angular momentum but which have different total angular momenta, and therefore have slightly different energies due to spin-orbit coupling.
(electromagnetism)
(fluid mechanics)
A source and a sink separated by an infinitesimal distance, each having an infinitely large strength so that the product of this strength and the separation is finite.
(optics)
A lens made up of two components, especially an achromat.
(particle physics)
Two elementary particles which have slightly differing masses and the same baryon number, spin, parity, and charge conjugation parity (if self-conjugate), but have different charges.
(physical chemistry)
Two electrons which are shared between two atoms and give rise to a nonpolar valence bond.
(spectroscopy)
Two closely separated spectral lines arising from a transition between a single state and a pair of states forming a doublet as described in the atomic physics definition.
References in periodicals archive ?
She speculated that children with doublets may have higher airway resistance, which "might be why the population of children with autism spectrum disorder are not truly athletic people.
Predictably, the frequency of occurrence of doublets in the S.
To reach to the more fundamental laws of physics, we shall put a simple mechanical definition for time and a symmetry rule that governs the displacement of point particles (and doublets as a result) in space.
The most extensive use of doublets plus targeted agent is in the US, in contrast with Europe and Japan.
Meta-analysis of randomized trials comparing gemcitabine-based doublets versus gemcitabine alone in patients with advanced and metastatic pancreatic cancer.
Her signature chiffon dresses, often laser cut to evoke the slashed doublets of Elizabethan courtiers, are the most beautiful of all her designs.
The Black Prince, the royal son who fought brilliantly at Crecy in 1346, was the contemporary of languid Florentine adolescents who wore tight hose and short doublets as they strolled about in packs and often engaged in homosexual activity--teens from wholly different contexts.
Apparently it's been frilly shirts and doublets at dawn between rival channels ITV1 and BBC1, as their latest big-budget costume dramas prepare to hit the small screen this week.
Szarmach, on the Timaeus in Old English; and Ronald Waldron, on John Trevisa's use of doublets as a translation technique.
The NIST researchers had earlier prepared simulated spectra, based on a factorial design that consisted mainly of overlapping doublets for carbon is photoelectrons from polymers.
Tracing the doublets through their continuity within sources enabled scholars to isolate the distinctive usage, and ideas, of each source.
Dada's dun-colored short dresses on the women and doublets over tights for the men proved to be the most successful costume ensemble of the evening