Jayasheelan A, Manjunatha S, Yashodhara I, Karunakara N
Department of Physics, GFGC, Sira, Karnataka 572137, India.
Radiat Prot Dosimetry. 2014 Jan;158(1):73-8. doi: 10.1093/rpd/nct187. Epub 2013 Aug 1.
The activity concentration of (226)Ra, (232)Th and (40)K was measured for soil samples collected from 34 locations of Tumkur District, Karnataka, India, using HPGe detector. The activity concentration of (226)Ra, (232)Th and (40)K varied from 9.6 to 71.6, 12.3 to 333.3 and 194.3 to 1527.7 Bq kg(-1) with an average value of 33.15, 123.01 and 877.76 Bq kg(-1), respectively. The absorbed and annual effective outdoor doses were found to be highest at Ponnasamudra with 258.98 nGy h(-1) and 317.62 μSv and lowest at Sira with 36.42 nGy h(-1) and 44.67 μSv, respectively. The external hazard index ranged from 0.21 to 1.58 with an average of 0.75. It was significant in 11 locations as it exceeded unity.
使用高纯锗探测器对从印度卡纳塔克邦图姆库尔区34个地点采集的土壤样本进行了镭-226、钍-232和钾-40的活度浓度测量。镭-226、钍-232和钾-40的活度浓度分别在9.6至71.6、12.3至333.3和194.3至1527.7贝可勒尔每千克之间变化，平均值分别为33.15、123.01和877.76贝可勒尔每千克。发现室外吸收剂量和年有效剂量在波纳萨穆德拉最高，分别为258.98纳戈瑞每小时和317.62微希沃特，在西拉最低，分别为36.42纳戈瑞每小时和44.67微希沃特。外部危害指数在0.21至1.58之间变化，平均值为0.75。在11个地点该指数显著，因为超过了1。
