multiplet


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multiplet

[′məl·tə·plət]
(quantum mechanics)
A collection of relatively closely spaced energy levels which result from the splitting of a single energy level by an interaction which is relatively weak; examples are spin-orbit multiplets and isospin multiplets.
(spectroscopy)
A collection of relatively closely spaced spectral lines resulting from transitions to or from the members of a multiplet (as in the quantum-mechanics definition).
References in periodicals archive ?
On condensation of the Schiff-base with formaldehyde and resorcinol, the aromatic ring protons appeared in the range 6.79-7.76 ppm as a multiplet signals and the azomethine proton appeared at 8.46 ppm.
Multiplet earthquakes are believed to happen when chunks of crust are stuck in faults, or plate boundaries have irregular shapes, meaning the tension is not fully released when a singular earthquake happens.
Area under the curve of the [sup.1]H-NMR spectra was integrated for the glutathione signals (GSSG, oxidized form, multiplet at 4.75 ppm; GSH, reduced form, multiplet at 4.56 ppm).
The [.sup.1]H-NMR spectrum for compounds 4-6 showed significant peaks as the following singlet in the range (2.68-3.24 ppm) due to (C[H.sub.2]) group,(6,25-6.39 ppm) to (CH) group in the ring, while the aromatic part showed multiplet in the range (7.14-8.29 ppm), also the protons of (SH) group were appeared in the range (13.35-12.93 ppm).
We further observed that the Matrix Calogero models and (at v = 0) the free particle multiplet exhibit (relativistic) higher-spin symmetries.
In the aromatic region, the [sup.1]H NMR spectra of 1 and 2 consist of two multiplets corresponding to the protons of the condensed benzene ring (C5H and C8H, and C6H and C7H, resp.), with the chemical shifts significantly differing from those of the uncoordinated qx and qz ligands.
Still, the nickel oxide spectra pose a number of obstacles like complex multiplet splitting, satellite appearance and plasmon loss structures, which makes it difficult to assess the nature of the oxidized nickel species in detail [52].
The [sup.1]H NMR also revealed the presence of two doublet of doublets ([delta] 4.11 - [delta] 4.13; [delta] 4.27 - [delta] 4.28) and a multiplet ([delta] 5.24) (Table 2) which is characteristic of the protons on the glyceryl moiety of triacylglycerols.
The four olefinic protons (H-13, H-14 and H-31, H-32) are an overlapping multiplet at 5.35 ppm, whereas the oxygenated methylene (H-23) is a downfield triplet at 4.05 ppm.
The abbreviations used are as follows: s: singlet; d: doublet; m: multiplet.
On the other hand, the pronounced XAS multiplet structure at the Co [L.sub.2,3] edges for the as-deposited film (Figure 4(b)) arises from Coulomb and exchange interactions between 2p core hole and 3d valence states and is typical for a [Co.sup.2+] ion.

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