Nuclear Physics and Atomic Energy

Ядерна фізика та енергетика
Nuclear Physics and Atomic Energy

  ISSN: 1818-331X (Print), 2074-0565 (Online)
  Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine
  Languages: Ukrainian, English
  Periodicity: 4 times per year

  Open access peer reviewed journal


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Nucl. Phys. At. Energy 2006, volume 7, issue 1, pages 60-66.
Section: Radiation Physics.
Received: 22.02.2006; Published online: 30.06.2006.
PDF Full text (ru)
https://doi.org/10.15407/jnpae2006.01.060

Radiation hardness of silicon doped by germanium with high concentration of free oxygen

M. D. Varentsov, G. P. Gaidar, A. P. Dolgolenko, P. G. Litovchenko

Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine

Abstract: Radiation hardness of Czochralski grown n-type silicon samples, doped by germanium (NGe = 2 · 1020 cm-3) and without that was investigated after irradiaton by fast neutrons of WWR-M reactor at room temperature. The dependence of effective carrier concentration on fluence was described in the framework of the improved Gossick's model. It was found that the introduction of germanium leaded to the increase of n-Si radiation hardness by factor of seven. The isothermal annealing of n-Si<Ge> after fluence 1.4 · 1014 no · cm-2 was studied for three temperatures. It was shown that the annealing of defect clusters is caused by the annihilation of vacancy type defects in clusters with the interstitial defects. Migration energy and frequency factor for di-interstitial (Е1 = 0.74 eV; ν1 = 3.5 · 106 s-1), for silicon interstitial atom (Е2 = 0.91 eV; ν2 = 7 · 107 s-1) and for vacancy (Еv = 0.8 eV; ν = 1 · 107 s-1) were determined.

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