In this study, natural radionuclide levels and mass absorption coefficients of obsidian samples were examined to determine their gamma radiation properties. Fourteen obsidian samples were collected from 7 different locations in Rize province, İkizdere region, Turkey. X-ray fluorescence measurements of the samples revealed the silica structure and comparable elemental structure with slight differences in atomic ratios. Radionuclide analysis showed that the ¹³⁷Cs activity was below the detection limit, and the mean activities of ²³⁸U, ²³²Th and ⁴⁰K were 93 ± 9, 67 ± 7, 1027 ± 19 Bq.kg⁻¹, respectively. The average experimental mass absorption coefficients at 81.0 keV, 302.9 keV, 356.0 keV and 661.7 keV were found to be 0.216, 0.108, 0.098 and 0.080 cm² g⁻¹, respectively. In the <100 keV region which the photoelectric effect is dominant, differences among the absorption coefficients were more pronounced, while it was relatively much smaller in the intermediate energy region. Also, it was seen that the absorption coefficients of the samples were higher than many materials, especially in the low energy region. The average half-value thicknesses showed that obsidian between 1.43 cm and 3.84 cm depending on the photon energy should be used to halve the radiation intensity. In addition, it was determined that the thicknesses in the range of 4.75 cm–12.76 cm were sufficient to reduce the intensity to one tenth. Considering all the analysis results, it can be said that obsidian is a potential material in radiation protection and its absorption properties can be improved by processes such as elemental doping.

在这项研究中，对黑曜石样品的天然放射性核素水平和质量吸收系数进行了检查，以确定它们的伽马辐射特性。从土耳其İkizdere 地区 Rize 省的 7 个不同地点收集了14 个黑曜石样本。样品的X 射线荧光测量揭示了二氧化硅结构和可比较的元素结构，原子比略有不同。放射性核素分析表明¹³⁷ Cs活度低于检出限，²³⁸ U、²³² Th和⁴⁰ K的平均活度分别为93±9、67±7、1027±19 Bq.kg ^-1， 分别。81.0 keV、302.9 keV、356.0 keV 和 661.7 keV 的平均实验质量吸收系数分别为 0.216、0.108、0.098 和 0.080 cm ²  g ^-1， 分别。在光电效应占主导地位的<100 keV区域，吸收系数之间的差异更为明显，而在中能区域则相对要小得多。此外，可以看出样品的吸收系数高于许多材料，尤其是在低能区。平均半值厚度表明，应使用取决于光子能量的介于 1.43 cm 和 3.84 cm 之间的黑曜石将辐射强度减半。此外，确定 4.75 cm–12.76 cm 范围内的厚度足以将强度降低到十分之一。综合所有分析结果，