September 2016

Electrical resistivity and Seebeck coefficient of Pd81Ge19

We report on the simultaneous measurement of resistivity and Seebeck coefficients in samples of Pd81Ge19 ribbons prepared by the melt spinning technique method and having a typical dimension of 40.0 mm × 1.75 mm × 0.028 mm. The investigation was performed using a new completely automated device in a large temperature range (from room to 700°C). Structural changes, crystallization times and heat...

Author(s): A. Achouri, A. Boukraa and L. Mohammedi

September 2016

Natural radioactivity level of clay, ceramic, and stone cooking dishes in Saudi Arabia

Standards and guidelines are needed in the manufacture of household cooking dishes from clay, ceramic, and stone in Saudi Arabia. The radioactivity levels due to the presence of 40K, 232Th, and 226Ra in these materials were determined using gamma spectrometry equipped with high purity germanium (HPGe) detector. The activity concentrations of 226Ra ranged from 5.75 Bq kg−1 (Yemen stone sample) to 192.35 Bq...

Author(s): Alharbi W. R.