Carbon in High-Purity Germanium
- 1 January 1982
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Nuclear Science
- Vol. 29 (1), 745-750
- https://doi.org/10.1109/tns.1982.4335949
Abstract
Using 14C-spiked pyrolytic graphite-coated quartz crucibles for the growth of nine ultra-pure germanium single crystals, we have determined the carbon content and distribution in these crystals. Using autoradiography, we observe a rapidly decreasing carbon cluster concentration in successively grown crystals. Nuclear radiation detectors made from the crystals measure the betas from the internally decaying 14C nuclei with close to 100% efficiency. An average value for the total carbon concentration [14C+12C] is ~2×1014cm-3, a value substantially larger than expected from earlier metallurgical studies. Contrary to the most recent measurement, we find the shape of the beta spectrum to agree very well with the statistical shape predicted for allowed transitions.Keywords
This publication has 13 references indexed in Scilit:
- Physics of ultra-pure germaniumAdvances in Physics, 1981
- High-purity germanium crystal growingNuclear Instruments and Methods, 1971
- The solubility of carbon in pulled silicon crystalsJournal of Physics and Chemistry of Solids, 1971
- High Purity Germanium for Detector FabricationIEEE Transactions on Nuclear Science, 1971
- Experimental evidence for the nonstatistical shape of the beta spectrum of14CLettere al Nuovo Cimento (1971-1985), 1970
- Zum Einbau von Kohlenstoff bei der Herstellung von ReinstsiliciumSolid-State Electronics, 1968
- Oxygen in germanium by vacuum fusion and infra-red absorptionBritish Journal of Applied Physics, 1965
- Beta Spectra ofandPhysical Review B, 1954
- Versuch einer Theorie der ?-Strahlen. IThe European Physical Journal A, 1934
- Sopra lo Spostamento per Pressione delle Righe Elevate delle Serie SpettraliIl Nuovo Cimento (1869-1876), 1934