doublet

(redirected from doublets)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Microscopic analysis revealed an absence of one of the microtubule doublets in three of the outer doublets of the axoneme, thereby establishing a diagnosis of isolated ciliary dysfunction.
Dr Nikolai Dzyubenko, the director of the Nikolai Vavilov All-Russia Institute of Plant Genetic Resources [VIR], told TASS, "We have an agreement with the Global Crop Diversity Trust, which operates the vault, to transfer for deposit there the doublets of seed plant collections."
The ratio of vacuum expectation values of the two Higgs doublets (tan [beta] = [v.sub.2]/[v.sub.1]) is a measure of the Higgs-fermion coupling in all 2HDM types [15].
Inclusion of a portion of exact exchange from Hartree-Fock theory using a hybrid functional can be important for the comparative description of systems involving electronic states with unpaired electrons, such as the quadruplet and doublets electronic states studied in this contribution.
"Doublets" is the name Lewis Carroll coined for this playful species of word ladder puzzle which he invented on Christmas Day in 1877.
Most were printed as pamphlets and the first half of the text focuses on these pamphlets; the second half collects his magazine columns devoted to his two invented word games, Doublets and Syzygies.
This spectrum was fitted by tree doublets. The fitting parameters in the spectrum are listed in Table 2.
In September 2014, HRD Antwerp issued an online report (www.hrd.be/en/news/a-differenttype-of-deception-diamond-diamond-doublet) on a diamond-diamond doublet. As with other doublets, this composite was comprised of two stones cemented together at the girdle.
But for the remaining ligands, the doublets are ground states, contrary to the BCO and BCS systems.
Chromatic aberrations in Fresnel lenses working as photovoltaic (PV) primary optics concentrators are an important limit in order to obtain high concentration ratios [2], leading to new optical solutions for the primary concentration system as aplanatic lens [7], low dispersion glasses, and achromatic doublets [8].
She noticed that although the airways of the children initially appeared normal, the lower airway had doubled branches, or "doublets" as she calls them.