Book reviewDetermination of Dose Equivalent Resulting from External Radiation Sources. ICRU Report 39, pp. 7, 1985 (ICRU, Bethesda, Maryland, USA), $10.00. ISBN 0–913394–33–5

1985 ◽  
Vol 58 (696) ◽  
pp. 1176-1176
Author(s):  
D. Greene
Keyword(s):  
External Radiation ◽  
Dose Equivalent ◽  
Radiation Sources

scholarly journals Evaluation of syringe shield effectiveness in handling radiopharmaceuticals

2015 ◽  
Vol 30 (2) ◽  
pp. 158-163 ◽  
Author(s):  
Yong-In Cho ◽  
Chang-Soo Kim ◽  
Jung-Hoon Kim
Keyword(s):  
Nuclear Medicine ◽  
Radiation Source ◽  
Skin Surface ◽  
Shielding Effect ◽  
Shield Effectiveness ◽  
Radiation Shield ◽  
Dose Equivalent ◽  
Dose Evaluation ◽  
Radiation Sources

The purpose of this study was to evaluate the effectiveness of the radiation shield of radionuclide syringes and the personal dose equivalent by performing a simulation of radionuclides used in nuclear medicine diagnosis. In order to evaluate the dose depending on the distance between the radiation source and the ICRU sphere against the thickness of the shielding device, the distance at which a nuclear medicine worker may inadvertently come into contact with radiation from the radiation source was set at 0 cm to 30 cm according to the thickness of the shield, thus fixing the ICRU sphere. For a dose evaluation, Hp(10), Hp(3), and Hp(0.07) measurable in specific depth of the ICRU were evaluated. It was found that a dose measured on skin surface of nuclear medicine workers was relatively higher, that the dose varied in relation to the thickness of the radiation shield, and that the shielding effect decreased for some radiation sources such as 67Ga and 111In. It proved necessary to increase thickness of shielding device to the radiation sources such as 67Ga and 111In. It is also considered that a study of proper shielding thickness will be needed in future.

INVESTIGATION OF EXTERNAL RADIATION DOSES DURING RESIDENTS’ TEMPORAL STAY TO NAMIE TOWN, FUKUSHIMA PREFECTURE

2019 ◽  
Vol 184 (3-4) ◽  
pp. 514-517 ◽  
Author(s):  
T Tsujiguchi ◽  
Y Shiroma ◽  
T Suzuki ◽  
Y Tamakuma ◽  
M Yamaguchi ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Radiation Doses ◽  
External Radiation ◽  
Dose Equivalent ◽  
Fukushima Prefecture ◽  
Maximum Value ◽  
External Radiation Dose ◽  
Equivalent Rate ◽  
The Relationship ◽  
The Town

Abstract Namie Town in Fukushima Prefecture, the majority of which was an evacuation area as a result of the effects of the Fukushima Daiichi Nuclear Power Plant accident, carried out a ‘temporal stay’ in September 2016 so that residents could check their houses. Therefore, in cooperation with the town authorities, the authors distributed personal dosemeters and behaviour record forms to record the personal dose equivalent rate and investigate the relationship between residents’ external radiation dose and their behaviour. When the personal dose equivalent rate was calculated from the measured personal dose equivalent per hour, the median was 0.12 μSv h−1, the maximum value and the minimum value were 0.58 and 0.06 μSv h−1, respectively. Meanwhile, since personal fluctuations were observed in personal dose equivalent, grasping the relationship between residents’ behaviour and exposed dose can be applied to risk communication.

scholarly journals Thermoluminescence Analysis of the Clay Core of Bronze Statues: A Re-Appraisal of the Case Studies of Lupa Capitolina and Other Masterpieces in Rome

2021 ◽  
Vol 11 (17) ◽  
pp. 7820
Author(s):  
Marco Martini ◽  
Anna Galli
Keyword(s):  
Dose Rate ◽  
Water Content ◽  
External Radiation ◽  
Radiation Reduction ◽  
Tl Dating ◽  
Imperial Period ◽  
Radiation Sources ◽  
Clay Core ◽  
Thermoluminescence Analysis ◽  
Good Agreement

In this work, we present some new results in applying thermoluminescence (TL) dating to the clay core of bronze statues. This is very important, due to the impossibility of directly dating a metal. Very few cases of indirect dating of clay cores by TL are reported in the literature. We re-considered three cases of dating of clay core from important bronzes in Rome. The parameters to be considered were not easy to calculate in the case of the Lupa Capitolina. However, its traditionally reported Etruscan origin is definitely ruled out, even if the accuracy in the dating is too low to precisely propose a date of the casting. The comparison with radiocarbon results shows good agreement for a Medieval dating. Two other bronze statues were analysed in order to date their casting by TL; a horse from Musei Capitolini resulted to have been cast in the Greek classical period, excluding its casting in the Rome imperial period. A third study shows that, in particularly favourable situations, TL dating of clay core can give rather precise results. This is the case where in the clay core are present materials that behave like good dosimeters, as generally happens in dating ceramics. Furthermore, the possibility of measuring all the parameters influencing the calculation of the dose rate is essential; both the external radiation sources and the radiation reduction by the water content must be taken into account. This was the case of Saint Peter in the Vatican that turned out to be a cast from the beginning of the XIV century.

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