Annealing kinetics

In addition to the generation of platelets, hydrogenation of silicon also induces electronic deep levels in the band gap. As in the case of platelet formation, these defects are considered to be unrelated to either plasma or radiation damage because they can be introduced with a remote hydrogen plasma. Comparison of depth distributions and annealing kinetics of the platelets and gap states has been used to a limited extent to probe the relationship among these manifestations of H-induced defects. 

As described above, there is a striking correlation between the creation and annealing kinetics of metastable defects in a-Si H and the motion of bonded hydrogen. There are essentially two classes of models proposed to both account for this agreement and to explain the microscopic mechanisms for hydrogen diffusion. One type of model assumes that the hydrogen is intrinsically mobile and moves from one bonded position to another... 

C. Christofides, Photomodulated Thermoreflectance Investigation of Implanted Wafers. Annealing Kinetics of Defects... 

C.P. Flynn. Monodefect annealing kinetics. Phys. Rev., 133(2A) A587, 1964. 

In a more realistic and complicated case, defects at several relative distances are produced. As is easily seen from Fig. 3.10, the step-structure on the annealing curve is pronounced to be worse, the greater the distance of an H centre from a vacancy it is no longer easily seen even for 2nn and 3nn, despite their elastic interaction. A comparison of theoretical calculations with actual experimental data as well as a more detailed treatment of the F, H annealing kinetics is given in [77]. 

First indications for such sites came from the observation that melting/re-annealing kinetics differed markedly between y-irradiated T1 DNA and the same DNA damaged by mechanical or enzymatic degradation (Martin-Bertram and Hagen 1979). It has been concluded that in addition to singly-damaged sites locally denatured sections of DNA must be formed upon y-irradiation (see also... 

Carlson W. D., Donelick R. A., and Ketcham R. A. (1999) Variability of apatite fission-track annealing kinetics 1. Experimental results. Am. Mineral. 84, 1213-1223. 

The Vand-Primak treatment of annealing kinetics, in which the energy... 

Yamada R, Tagami T, Nishimnra S, Ito H (1995) Annealing kinetics of fission tracks in zircon—an experimental stndy. Chem Geol 122 249-258... 

Bertel E, Mark TD (1983) Fission tracks in minerals annealing kinetics, track stmcture and age correction. Phys Chem Mineral 9 197-204... 

Ketcham RA, Donelick RA, Carlson WD (1999) Variability of apatite fission-track annealing kinetics III. 

Previous works [98] have also revealed that (i) the nature of the precursors or (ii) the annealing kinetic parameters play a significant role for the stabilization of the metastable phase. Indeed, for chloride-based precursors, the pyrochlore structure is directly obtained. This is explained by the high affinity of Q anions relative to Ln ", which prevents the formation of the complex with 2,4-pentane-dione and thus the formation of a homogeneous gel. In addition, for the kinetic aspect, the layered perovskite phase is favored for rapid annealing or quenching directly at 950 °C. 

The recoil chemistry of Cd phthalocyanine has been studied by following the behaviour of the In daughter product. The argument is that no bond rupture occurs in the beta decay, and all observed effects are due to the (n,y) reaction during the production of Cd. This is contrary to general experience in p decay studies (see Section 7). The evidence is that cadmium phthalocyanine, which is ionic, anneals even at 20 C, in contrast to crystals of the copper and zinc complexes. A detailed analysis of the annealing kinetics is given. ... 

Neutron diffraction techniques have been used to substantiate the model for the oscillating structure in the thermal annealing kinetics of Co(en)3,3H20 and Co(en)3(N03)3,3H20. The role of lattice defects is to be considered dominant in manystudiesof thermal annealing of recoil products and radiation damage. " ... 

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