Full width at half maximum height

Fig. 2. The behavior of the magnetization vector (i) is shown in response to the application of a single 7i/2 r.f. pulse along V, (ii). The decay of the magnetization vector in the x -y plane yields the received time-domain signal, called the FID, shown in (iii). The result of a Fourier transformation of the FID is the spectrum shown in (iv). For a liquid-like sample, the full-width at half-maximum-height of the spectral signal is l/itV) (Section II.A.2).

Figure 5 There are two definitions of mass resolution. These are based on either two overlapping peaks of equal intensity separated by AM (a) or a single well-defined peak with AM defined as the full-width at half-maximum height (FWHM) (b).

A more convenient definition, commonly used with trapping and ToF analyzers, pertains to a single well-resolved peak where AMX is the peak width at a specified height x, usually half-maximum height (full-width at half-maximum height, FWHM) (Figure 5(b)). It should be noted that this FWHM definition of resolution equates to about twice that calculated from the 10% valley definition. 

V./2 full width at half-maximum height (NMR spectra)... 

Like the normal distribution, the Lorentzian distribution is a continuous function, symmetric about its mean, p, with a spread characterized by the half-width, c0 /2. The standard deviation is not defined for the Lorentzian distribution because of its slowly decreasing behaviour at large deviations from the mean. Instead, the spread is denoted by o>i/2, defined as the full-width at half maximum height. Figure 1.7 illustrates the comparison between the normal and Lorentzian shapes. We shall meet the Lorentzian function in subsequent chapters. 

Resolution (see Section 2.5.4) is reported as the peak full width at half maximum height (FWHM) for solid state detectors, and as FWHM divided by the peak centroid energy for Nal(Tl) detectors. The FWHM increases slowly with peak energy. 

The full widths at half-maximum height of the Gaussian-shaped absorption and emission peaks in this limit are both given by,... 

Shevchenko and colleagues have developed a somewhat different form of shotgun lipidomics which is particularly suitable to applications utilizing a hybrid linear ion trap (LIT) Fourier transform (FT) instrument, for example, LTQ-Orbitrap, called top-down lipidomics [18,24]. In a top-down lipidomics experiment, the survey scan is recorded at high resolution (100,000) (full width at half maximum height [FWMH]) in the FT analyzer. Mass accuracy on FT instruments is typically <5 ppm and often with internal calibration <2 ppm. This degree of mass accuracy... 

As defined in Section 1.4, the resolution of a mass analyzer is a measure of its ability to separate one mass from another. In defining resolution, the abbreviation FWHM stands for full width at half maximum (height), i.e., the miz of the ion of interest divided by the width of the ion at 50% of its height (intensity). Thus, for a singly charged ion of mass 600 that has a width of 0.075 at half height, the resolution is 8,000 (600/0.075 = 8,000). 

FWHM Full width (at) half maximum (height) (resolution definition)... 

P = total line broadening (instrument line broadening must be subtracted), the full width at half maximum height (FWHM) through the (002) reflection 0 = angle of the peak position (Bragg angle), rad... 

Table 1. XPS Binding Energies (Eb 0.1 eV), Full Width at Half-Maximum Height (fvrhm), and Elxperimental Results of...

XPS binding energies (B.E.), full width at half-maximum height (FWHM) and experimental results of quantitative analysis of bulk ZnDTP (frozen on gold). Attenuation length [A] and sensitivity factors [S] calculated for the commercial ZnDTP frozen on gold. 

B is the full width at half maximum height of the diffraction peak, and 20/2 is the peak position in 20 divided by 2, or the peak position given in 0 [42]. Scherrer s equation is applicable to all nanomaterials whether they are pure metallic, metallic oxide or organic nanoparticles. Figure 12.3(a) shows the background-corrected and normalized XRD patterns of gold nanoparticles formed on an oat biomass through... 

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