Doppler broadening lineshape parameter

Figure 8.4 Doppler broadening lineshape parameter vs temperature in DyBa2Cu307 Yo.5Pro.5Ba2Cu307 and PrBa2Cu307. The arrow indicates Tc, From Jung et al [34,35].

Figure 8.9 Variation with quenching temperature of, (a) positron lifetime, (b) Doppler broadened lineshape parameter, I, and (c) oxygen deficiency, as obtained from weight loss (+) and Tc (o) measurements. From Bharathi et al. [54].

For the moment we shall consider the standard method for describing the Doppler-broadened linewidth—i.e. by using a simple lineshape parameter. By far the most common parameters used—called S and W—are defined... 

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