doublet


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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 ?
In general, 2HDM involves five physical Higgs bosons due to the extended degrees of freedom added to the model by introducing the second Higgs doublet. The lightest Higgs boson, h, is like the SM Higgs boson.
For each of the investigated interactions, the energies of the lowest-lying quadruplet and doublet radical fragments MO + SO that vary only in the spin of the unpaired parallel electrons of the SO fragment were calculated at CASSCFMRMP2 level of theory.
Among the 43 patients who were evaluable for response, the objective response rate for all tumor types was 30% (38% for the doublet dosing schedule and 18% for the triplet dosing schedule), with a 7% complete response rate and a 23% partial response rate.
Total number of nuclei counted in each medium was 187 (N), 295 (AGEs), 288 (NT-4), 234 (citicoline), 262 (TUDCA), 231 (doublet), and 248 (triplet).
We may suppose that the doublet with [delta] and [DELTA][E.sub.Q] values of 0.12 and 0.9 mm/s is attributed to a ferric phase in ferrous gluconate, according to a certificate analysis.
1H-NMR (CD3OD, 300 MHz) d: 9.01 (1H, singlet, N-H ) , 7.52 (2H, doublet, J=8.7 Hz, H-2'/H- 6'), 7.41 (2H, doublet, J=8.7 Hz, H-3'/H-5'), 7.33- 7.18 (5H, multiplet, H-1''/ H-2''/H-4'', H-5''/H-6''), 4.14 (1H,singlet, H-4), 3.47-3.35 (4H, multiplet,, H- 2/H-6), 3.17 (2H, multiplet, H/7), 2.73 (2H, d, J= 7.5 Hz, H-9), 2.30 (4H, double triplet, J=14.1,4.7, H- 3/H-5), 2.11 (2H, multiplet, H/8),
The second charges (-[e.sub.*]) in the first terms of (2) and (3), and the second charges ([e.sub.*]) in the first terms of (6) and (7), suggest that free particles and their antiparticles exist in two separate spaces, corresponding respectively to the negative and positive branches of the PV charge doublet.
It is likely that more such diamond-diamond doublets will enter the market; fortunately, their strong internal reflections and join lines make these doublets easy for experienced diamond graders to detect.
Thanks to funding from the Postcode Lottery, Sir Jacob's coat and doublet have been restored at the trust's textile conservation studio in Blickling, in Norfolk.
Assistant Chief Constable Ian Wiggett, of Greater Manchester Police, said: "This investigation is one of a number of cases which comes under the umbrella of Operation Doublet, which is the continued investigation into child sexual exploitation (CSE) that arose following the 2011 investigation into CSE in Rochdale.
(2-5) Detailed analyses of hyperactivated flagellar movement suggest that the large bends at the proximal midpiece result from the increase in the total amount of sliding between the doublet microtubule of the sperm flagella.
The heart of the instrument is a reflective grating positioned behind an oversized achromatic doublet. Its highly reflective chromium surface and transfer mirror enable you to directly track the target star through the guide port with your autoguiding camera.