Thermoluminescence study of pellets prepared using NaCl from Khewra Salt Mines in Pakistan

Dosimetric properties of thermoluminescent NaCl pellets from Khewra Salt Mines, Pakistan

“…NaCl salt pellets dose response curve from 1 to 100 mGy and 100 to 10,000 mGy dose [17] substantial overestimation of the dose for photons with lower energies. In this study, a maximum overestimation by a factor of four can be seen at the lowest energy (33 keV).…”

“…In Figure 6, the dosimeter's relative energy response indicates a F I G U R E 3 TL glow curves. [17] (a) 1-100 mGy, (b) 100-10,000 mGy…”

“…Chemical composition of the constituents has no effect on the behaviour of materials, while the atomic number of the constituent elements does affect the gamma and X-ray response. [10,26,49] The calculated Z eff was 14.6 based on the weight fraction measurements calculated for the Khewra mine salt using ICP data as presented in Table 1 (reproduced with permission [17] ). The Z eff value of the salt sample is close to TLD-200 (Z eff = 16.3).…”

“…[11][12][13][14][15] Compressing NaCl salt into pellets makes it easier to handle, enhances reproducibility, produce higher weight-normalized signals as compared to grains of salt and supports the potential use of NaCl for prospective dosimetry. [7,13,[16][17][18] The presence of impurities in materials either improves or degrades the TL property. Impurity concentrations in materials (such as natural salt) vary by region, as does the TL response.…”

“…[32] The current study is a continuation of a previously reported work on TL study of NaCl crystals in pellet form, taken from Khewra mines in Pakistan. [17] Khewra Salt Mine is the second largest NaCl deposits in the world where naturally occurring transparent NaCl crystals are available. These crystals have been formed by the natural process of re-crystallization.…”