|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.16 [2009] >
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]
|
|
