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- W2053398693 abstract "EPR studies are carried out for the float-zone intrinsic silicon irradiated with reactor neutrons up to the total fluence ${10}^{18}$ n/${mathrm{cm}}^{2}$. Details of the ${mathrm{Si}}^{29}$ hyperfine structure and of the $g$ tensor in the $Pensuremath{-}1$ spectrum are observed with respect to temperature from 77 to 350ifmmode^circelsetextdegreefi{}K. The anisotropy of the $g$ tensor and its continuous variation with temperatures are also discussed in terms of simple linear-combination-of-atomic-orbitals molecular orbitals and of the experimental results on the resonant wave function. In particular, the motional effect due to the electron-hopping between equivalent defect sites proposed by Nisenoff and Fan is not supported by these experiments, but an unusual thermal effect is observed in which the resonant-electron wave function is an average of both a ground and excited states, with the relative populations being proportional to the Boltzmann factor. The resonance properties of the pure ground state and pure excited state differ, which causes the $g$ and $A$ tensors to continuously vary with temperature and brings about a line broadening and narrowing in the hyperfine satellites as well as in the central lines. The line width broadening of the hyperfine lines is discussed on the basis that it is mainly due to transitions between the ground and excited electronic states. Based on the present results, a defect model for this center is established: a negative charge state of a nonplanar five-vacancy cluster." @default.
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- W2053398693 title "EPR Studies in Neutron-Irradiated Silicon: A Negative Charge State of a Nonplanar Five-Vacancy Cluster (<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mrow><mml:mn>5</mml:mn></mml:mrow><mml:mrow /><mml:mrow /><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>)" @default.
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- W2053398693 doi "https://doi.org/10.1103/physrevb.8.2810" @default.
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