Malaysian participation in the IAEA/WHO postal TLD and postal ionisation chamber intercomparison programmes: analysis of results obtained during 1985-2008

Abstract

During the years 1985-2008, the Secondary Standards Dosimetry Laboratory of Malaysia (SSDL Malaysia) has participated 37 times in the IAEA/WHO intercomparison programmes. This paper reports an analysis of the intercomparison data and demonstrates that the quality of the SSDL calibration service is well within the limits required by IAEA.

OSLD energy response performance and dose accuracy at 24 - 1250 keV: Comparison with TLD-100H and TLD-100

“…The Secondary Standard Dosimetry Laboratory of Malaysia (SSDL Malaysia) is the authoritative body for providing protection-level [1,2] in dose measurements for local radiation workers. Currently the SSDL Malaysia is using film badge and two thermoluminescence dosimeters called TLD-100H and TLD-100.…”

Response of LiF: Mg, Cu, P TL Detector Simulated with Geant4

“…Student's t was calculated to check whether there is evidence that the simulated results are systematically higher than the Obryk's results. Based on n=14, the mean (μ), the standard deviation () and the standard error (SE) in the mean of the deviations were found to be μ= 0.59, = 7.26, SE= 1.94 (all in terms of percentage values) (Samat & Evans 1992;Samat et al 2009). For 13 degrees of freedom and a significant level of 5%, Student's t is 1.77 (Lind et al 2008).…”

Dosimetry audit for megavoltage photon beams applied in non-reference conditions

“…Malaysia first participated in the IAEA/WHO TLD Postal Audit Program in 1985 [17], a time when only five radiotherapy centres were operating in the country. The number has since grown markedly, with in 2018 22 centres participating in the IAEA/WHO reference conditions postal dosimetry audit [18]; 72.7% of the radiotherapy centres complied within ± 5% of stated dose.…”