Study on Influence of X-ray Baggage Scan on ESR Dosimetry for SNTS using Human Tooth Enamel

Abstract

The influence of X-ray baggage scanning on electron spin resonance (ESR) dosimetry studies around the Semipalatinsk Nuclear Test Site (SNTS) has been examined at Incheon Airport in Korea, which is a transfer point of the routes from Kazakhstan to Japan. Utilized dosimeters are Japanese human tooth enamel for ESR and glass dosimeters. The difference between the estimated doses with the X-ray scan and those without it is below the evaluation errors for both ESR and the glass dosimeters. For glass dosimeters, the dose from the X-ray scan is estimated to be lower than the detection limit for the utilized glass dosimeters of ten microGy. This supports the absence of significant difference for the ESR results, which have an error in the order of ten mGy. Since ESR dosimetry for SNTS usually has similar errors, the dose by the X-ray scan in this study is concluded to be negligible in ESR dosimetry using tooth enamel from residents near SNTS.

Dosimetry study of East Kazakhstan residents by tooth enamel EPR spectroscopy

“…The spectrometer was equipped with a high Q-factor cylindrical TE011 cavity model ES-UCX2. The spectrum recording parameters were the same as previously published [21][22][23][24]. Specially designed computer software was used for spectra processing and dose estimation [25][26][27].…”

Application of EPR dosimetry method for dose estimation among population of Stepnogorsk city, Republic of Kazakhstan, living close to the uranium-processing plant: preliminary results

“…Возраст зубной эмали определяли путём вычитания среднего воз-раста формирования зубов (в зависимости от позиции зуба в челюсти человека) из возраста донора на момент отбора образца эмали [2,3] -(см. табл.…”

“…Исследование яв-ляется пилотным и будет продолжено по мере получения новых образцов эмали зубов. Ретроспективная дозиметрия с использованием явления электронно-парамагнитного ре-зонанса (ЭПР) является одним из методов оценки доз облучения человека после неконтроли-руемых радиационных воздействий [2][3][4][5][6][7]. Этот метод позволяет оценить накопленные индиви-дуальные поглощённые дозы по образцам эмали зубов человека и через (как минимум) 50 лет после радиационного воздействия.…”

Evaluation of external and internal irradiation on uranium mining enterprise staff by tooth enamel EPR spectroscopy

“…It is therefore important to estimate the doses by independent methods. One of such methods is the EPR (electron paramagnetic resonance) dosimetry using tooth enamel [4][5][6][7]. This method can estimate individual accumulated absorbed dose through more than 50 years after exposure to radiation.…”