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10000-01-01 1970 Brown, Frederick C. Bolte, Steven Bernard 2011-07-26T19:08:27Z 2011-07-26T19:08:27Z Photoconductivity associated with two quantum absorption processes have been observed in uncolored crystals of KI. A Q-switched ruby laser and a KDP harmonic generator were used to produce light pulses whose quantum energy is more than half the band gap energy. The phbtbresponse in KI depends upon the square of the incident light intensity. Since the photo carriers are generated nearly uniformly throughout the crystal, the technique is especially useful as an intrinsic generation mechanism for transport experiments on crystals without F center or other donors. The photoconductivity is observed to increase between one and two orders of magnitude as the crystal is cooled from 77°K to 4°K reflecting the increase in mobility as the longitudinal optical modes of lattice vibration freeze out. The electric and magnetic field dependences indicate higher mobilities than usually found in colored alkali halide crystals. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-26T19:08:27Z No. of bitstreams: 1 1970_bolte.pdf: 2532198 bytes, checksum: 102d8d571e85b8d2c0c6502b1d3876c5 (MD5) Made available in DSpace on 2011-07-26T19:08:27Z (GMT). No. of bitstreams: 1 1970_bolte.pdf: 2532198 bytes, checksum: 102d8d571e85b8d2c0c6502b1d3876c5 (MD5) Previous issue date: 1970 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-26T19:08:27Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:32:56-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 6065009 http://hdl.handle.net/2142/25843 en 1970 Steven Bernard Bolte quantum photoconductivity potassium iodide Q-switched ruby laser KDP harmonic generator Two quantum photoconductivity in potassium iodide Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.