Anomalous decay

During the heat treatment (100—173 K) the carbanions react with O2 to form spectroscopically active peroxy radicals. The released electrons leak to the ground  

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One may ask why some experiments, for instance those done by microwave-afterglow technique 15,16 and the experiments by Canosa et al., 21,22 gave no indications of an anomalous decay. In part, the answer may be that small variations of the deionization coefficients are not easily detected in the presence of ambipolar diffusion. They were detected in the work of Adams et al. and of Smith and Spanel only because the diffusion losses were unusually slow in their large flow tube. 

Gauging the Wess-Zumino term with to respect the electromagnetic interactions yields the familiar 7r° — 27 anomalous decay. This term [35] can be written compactly using the language of differential forms. It is useful to introduce the algebra-valued Maurer-Cartan one form a = a dx = (d U) U l dxF = (dU) U l which transforms only under the left SUp 3) flavor group. The Wess-Zumino effective action is... 

Nevertheless, in certain cases anomalous liuninescence may be possible, identification of which may be based on the following aspects an abnormally large Stokes shift and width of the emission band a wavelength of emission that is not consistent with the wavelength anticipated from the properties of the compound an anomalous decay time and thermal behavior (Dorenbos 2003). Such luminescence may be red, for example at 600 nm in Bap2, with a decay time of about 600-800 ns. This is due to the fact that the emitting level contains spin octets and sextets, whereas the ground state level is an octet, so that the optical transition rate is slower because of spin selection rule (Dorenbos et al. 2003). 

V. Anomalous Decay of Mechano-radical Effect of Triboeiectricity (78)... 

This was the problem puzzling us for long time, and thus it was required interests to find a mechanism for this anomalous decay. Since the anomalous decay was most clearly observed for polypropylene, this polymer was chosen for detailed investigations. 

Studies of the variation in radical concentration with incre in temperature shows the very distinctive riw in radical concentration around Tg, when the radicals are produced by mechanical d adation. This effect is clearh visible in Fig. 44 and is referred to as the anomalous effect or anomalous decay. It is not observed from samples in which the radicals have been produced by irradiation. Figure 45 shows the decay curves obtained by Sohma etaL ° from polypropylene, where the radicals have been produced by mechanical degradation or 7-irradiation. The peak in radical concentration is absent in the case of 7-irradiated samples. 

This latter reaction would rmih in an increase in ESR intensity and hence would explain the anomalous decay. Son doubt exists whether this proposed mechanism can explain the anomalous decay experienced in tensile tested samples. Firstly the friction effects to produce the tribo-electricity charge are not so clearly present. Secondly, Mead et al have dtown that the peroxy radical content decreases as... 

Recently the same problem has been reanalyzed by Dicus et al. [86], and indeed they confirmed that the survival probability deviates from exponential at long times. This model and its variants have been applied to study the effect of a distant detector (by adding an absorptive potential) [87], anomalous decay from a flat initial state [44], resonant state expansions [3], initial state reconstruction (ISR) [58], or the relevance of the non-Hermitian Hamiltonian concept (associated with a projector formalism for internal and external regions of space) in potential scattering [88]. In Ref. [88] the model was extended to a chain of delta functions to study overlapping resonances. 

Granek, R. and Klafter, J., Fractons in proteins Can they lead to anomalously decaying time autocorrelations , Phys. Rev. Lett., 95, 098106 (2005). 

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