M. T. Saidin
1. School of Physics, Universiti Sains Malaysia Main Campus, 11800 Minden, Penang, Malaysia 2. Perak State Department, Ministry of Health Malaysia, Jalan Panglima Bukit Gantang Wahab, 30590 Ipoh, Perak, Malaysia
Malaysia

A. A. Rahman
School of Physics, Universiti Sains Malaysia Main Campus, 11800 Minden, Penang, Malaysia
Malaysia

H. H. Harun
https://orcid.org/0000-0001-8808-7945

1. Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia 2. Medical Radiation Surveillance Division, Ministry of Health Malaysia, Level 4, Blok E3, Kompleks E, Pusat Pentadbiran Kerajaan Persekutuan, 62590 Wilayah Persekutuan Putrajaya, Malaysia
Malaysia

Y. M. Radzi
School of Physics, Universiti Sains Malaysia Main Campus, 11800 Minden, Penang, Malaysia
Malaysia

C. Anam
Department of Physics, Universitas Diponegoro, Jl. Prof. Soedarto, SH., Tembalang, Semarang 50275, Indonesia
Indonesia

Z. Kayun
Medical Radiation Surveillance Division, Ministry of Health Malaysia, Level 4, Blok E3, Kompleks E, Pusat Pentadbiran Kerajaan Persekutuan, 62590 Wilayah Persekutuan Putrajaya, Malaysia
Malaysia