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IJEMS Vol.16(3) [June 2009] >


Title: Swift heavy ion induced thermoluminescence studies in polycrystalline aluminum oxide
Authors: Nagabhushana, K R
Lakshminarasappa, B N
Revannasiddaiah, D
Haranath, D
Singh, Fouran
Issue Date: Jun-2009
Publisher: CSIR
Abstract:  When energetic swift heavy ions interact with matter, inelastic collision (leading to electronic energy loss-Se) and elastic collision (leading to nuclear energy loss -Sn) take place. In the present study, the effect of energetic ion species on thermoluminescence (TL) of polycrystalline aluminum oxide (PAO) is reported. PAO pellets of 6 mm diameter are irradiated with energetic Au9+, Ni7+ and Si7+ ions for the fluence of 1×1013 ions cm-2. A single well resolved prominent TL glow with peak at 538 K is observed in Si7+ irradiated samples. However, in Ni7+ and Au9+ irradiated samples a prominent TL glow with peak at 610 K along with a shoulder at 513 K is observed. On the other hand, when PAO samples are irradiated with g-rays two well separated TL glows with peaks at 483 K and 638 K are observed. A prominent PL emission with peak at 430 nm besides a weak emission with peak at 480 nm and a shoulder at 525 nm are observed in 120 MeV Au9+ion irradiated samples when excited with 320 nm. These PL peaks are attributed to F, F2+ and F22+-centers respectively. However, in Si7+ irradiated samples a single PL emission peak at 430 nm is observed and it is attributed to F-centers.
Page(s): 161-164
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Source:IJEMS Vol.16(3) [June 2009]

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