doublet


Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.
Related to doublet: doublet antenna, doublet flow

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 ?
Secondary goals To determine the progression-free survival rate of NSCLC patients who have failed standard platinum doublet therapy when treated with VAL-083; to determine the overall survival of NSCLC patients who have failed standard platinum doublet therapy when treated with VAL-083; and to evaluate the quality of life and impact on disease symptoms following treatment with VAL-083.
She went on to note that research into neuron developmental processes, including autism and autism spectrum disorder, and anatomical anomalies such as doublets in the bronchi "should and will be accelerated.
The Ca II K line and the Na I doublet are complementary: the first one is sensitive to partially ionized gas (Ca II atoms are missing one electron), and the second one traces cold and neutral interstellar gas.
The transformation between point and doublet particles may be looked at as a process of equilibrium or a continuous forward and backward transformation --an evaporation condensation process if you like, and one that can be observed on larger and larger scales in nature.
In contrast to the meta-analysis, this single Phase III study compared a triplet regimen (docetaxel, cisplatin, 5-FU) with a doublet (cisplatin, 5-FU).
Historical guide Mel Brookes has worn doublet and hose to work for 10 years.
Following a mid-winter lull in fortunes, the Seamus Mullins team are bouncing back to form and 16-1 chance Miss Doublet kept the ball rolling when seeing off Bally Bolshoi in the mares' novice hurdle.
The explanation is that removal of the optical electron from a noble gas atom yields an ion whose ground configuration does not consist of a single level, but rather a doublet [.
Doublet B, Lailler R, Meunier D, Brisabois A, Boyd D, Mulvey M, et al.
As of December 9, 281 deaths have been reported in the doublet therapy trial, STELLAR 3, and 222 events among 388 patients who received XYOTAX at the 175 mg/m2 dose or control in the single agent trial, STELLAR 4.
Jennifer Doublet still remembers the first time she discovered the Encino Velodrome.