Vol. 8, 2023
Radiation Measurements
Measurements of 232Th/238U ratio using different techniques: A comparative study
W. Arafa, H. M. Mahmoud, E. Yousf, A. Ashry, A. Elsersy, I. Elaassy, H. El Samman
Pages: 125-130
DOI: 10.37392/RapProc.2023.26
Abstract | References | Full Text (PDF)
The present work was conducted to determine Th/U ratios in different types of natural rock samples (sedimentary, conglomerate, igneous and sediments) using high-purity germanium detector, solid state nuclear track detectors and inductively coupled plasma mass spectrometers. A thin source approach method for alpha tracks measurements was used. A new method was introduced for forming a thin layer of the rock sample. The track densities were obtained using an optical microscope coupled with a digital camera and spark counter. Even though the measurements were carried out using very different techniques, they showed comparable values of Th/U ratio for most of the rock samples.
-
A. Olanya, D. Okello, B. Oruru, A. Kisolo,
“The Primordial Radionuclides Activity Concentrations and Associated Minerals in Rocks from Selected Quarries in
Northern Uganda,” IJSBAR,
vol. 66, no. 1, pp. 45 – 65, Dec. 2022.
Retrieved from: https://core.ac.uk/download/552586824.pdf
Retrieved on: Sep. 22, 2023 -
L. Cao et al., “Discussion on the applicability of Th/U ratio for
evaluating the paleoredox conditions of lacustrine basins,”
Int. J. Coal Geol., vol. 248, no.1, 103868,
Dec. 2021.
DOI: 10.1016/j.coal.2021.103868 -
C. L. Kirkland, R. H. Smithies, R. J. M. Taylor, N. Evans,
B. McDonald, “Zircon Th/U ratios in magmatic environs,” Lithos,
vol. 212 – 215, pp. 397 – 414, Jan. 2015.
DOI: 10.1016/j.lithos.2014.11.021 -
C. Yakymchuk, C. L. Kirkland, C. Clark, “Th/U ratios in metamorphic
zircon,” J. Metamorph. Geol., vol. 36, no. 6, pp. 715 – 737, Aug.
2018.
DOI: 10.1111/jmg.12307 -
L. P. Rikhvanov,
“Using Radioactive Elements and the Th/U Ratio in Study of the Geochemical
Typification of Granitoids and Their Intrusive Character,”Russ.
Geol. Geophys., vol. 60, no. 9, pp. 1018 – 1025, Sep. 2019.
DOI: 10.15372/RGG2019067 -
A. G. Doroshkevich, D. A. Chebotarev, V. V. Sharygin,
I. R. Prokopyev, A. M. Nikolenko, “Petrology of alkaline silicate rocks
and carbonatites of the Chuktukon massif, Chadobets upland Russia:
Sources, evolution and relation to the Triassic Siberian LIP,” Lithos,
vol. 332 – 333,
pp. 245 – 260, May 2019.
DOI: 10.1016/j.lithos.2019.03.006 -
B. M. Al-Zahrani, H. S. Alqannas, S. H. Hamidalddin, “Study and
Simulated the Natural Radioactivity (NORM) U-238, Th-232 and K-40 of
Igneous and Sedimentary Rocks of Al-Atawilah (Al-Baha) in Saudi
Arabia,” WJNST, vol. 10, no. 4, pp. 171 – 181, Oct. 2020.
DOI: 10.4236/wjnst.2020.104015 -
M. M. El Galy, A. M. El Mezayn, A. F. Said,
A. A. El Mowafy, M. S. Mohamed, “Distribution and environmental impacts
of some radionuclides in sedimentary rocks at Wadi Naseib area,
southwest Sinai, Egypt,”
J. Environ. Radioact., vol. 99, no. 7, pp. 1075 – 1082, Jul. 2008.
DOI: 10.1016/j.jenvrad.2007.12.012 -
J. D. DePaolo, V. E. Lee, J. N. Christensen, K. Maher, “Uranium
comminution ages: Sediment transport and deposition time scales,” C. R.
Geosci., vol. 344,
no. 11 – 12, pp. 678 – 687, Nov. 2012.
DOI: 10.1016/j.crte.2012.10.014 -
T. A. Salama, U. Seddik, T. M. Dsoky, A. А. Morsy,
R. El-Asser, “Determination of thorium and uranium contents in soil
samples using SSNTD’s passive method,” PRAMANA, vol. 67, no. 2, pp. 269
– 276, Aug. 2006.
DOI: 10.1007/s12043-006-0071-4 -
L. Oufni, M. A. Misdaq, “Radon emanation in a limestone cave using
CR-39 and LR-115 solid state nuclear track detectors,” J. Radioanal.
Nucl. Chem., vol. 250, no. 2,
pp. 309 – 313, Nov. 2001.
DOI: 10.1023/A:1017951713943 - GammaVision Analysis version 8, ORTEC, Oak Ridge (TN), USA, 2015.
- Standard reference source number 122162B, Eckert & Ziegler Analysis, product code:8503-EG-SD, Jan. 2022.
-
M. O. Miller, “Modeling a HPGe detector’s absolute efficiency as a
function of gamma energy and soil density in uncontaminated soil,” SDRP
J. Earth Sci. Environ. Stud., vol. 3, no. 4, Dec. 2018.
DOI: 10.25177/JESES.3.4.2. 2018 -
N. Q. Huy, T. V. Luyen, “A method to determine 238U activity
in environmental soil samples by using 63.3-keV-photopeak-gamma HPGe
spectrometer,” Appl. Radiat. Isot., vol. 61, no. 6, pp. 1419
– 1424, Dec. 2004.
DOI: 10.1016/j.apradiso.2004.04.016 -
J. Al-Tuweity, H. Kamleh, M. S. Al-Masri, A. W. Doubal,
El M. Chakir, “Self-absorption correction factors: Applying a simplified
method to analysis of Lead-210 in different environment samples by
direct counting of low-energy using HPGe Detector,” E3S Web Conf., vol.
240, 03002, 2021.
DOI: 10.1051/e3sconf/202124003002 -
A. K. Mheemeed, A. Kh. Hussein, R. B. Alkhayat, “Characterization of
alpha-particle tracks in cellulose nitrate LR-115 detectors at various
incident energies and angles,” Appl. Radiat. Isotopes, vol. 79, pp. 48
– 55, Sep. 2013.
DOI: 10.1016/j.apradiso.2013.04.020 -
M. D. Salim, A. A. Ridha, N. F. Kadhim, A. El- Taher, “Effects of
Changing the Exposure Time of CR-39 Detector to Alpha Particles on
Etching Conditions,” J. Rad. Nucl. Appl., vol. 5, no. 2, pp. 119 – 125,
May 2020.
DOI: 10.18576/jrna/050206 -
D. Stanić, M. P. Sovilj, I. Miklavčić, V. Radolić, “Determination of track
counting loss threshold of spark counter due to high track densities on
strippable LR115 II nuclear track detectors,” Radiat. Meas., vol. 106,
pp. 591 – 594, Nov. 2017.
DOI: 10.1016/j.radmeas.2017.03.035 - A. F. Hafez “A new method for determining uranium and thorium,” Nucl. Instr. Methods Phys. Res., vol. 69, pp. 373 – 381, 1992.
-
S. A. Eman, S. H. Nageeb, A. R. El-Sersy, “U and Th Determination in Natural Samples Using CR-39 and LR-115 Track
Detector,” WJNST, vol. 2, no. 1, pp. 36 – 40,
Jan. 2012.
DOI: 10.4236/wjnst.2012.21006 -
M. Charles, “UNSCEAR Report 2000: Sources and Effects of Ionizing
Radiation,” J. Radiol. Prot., vol. 21, no. 1,
pp. 83 – 86, Mar. 2001.
DOI: 10.1088/0952-4746/21/1/609 -
N. K. Ahmed, A. G. M. El-Arabi, “Natural radioactivity in farm soil and phosphate
fertilizer and its environmental implications in Qena governorate, upper
Egypt,” J. Environ. Radioact., vol. 84, no. 1, pp. 51 – 64, 2005.
DOI: 10.1016/j.jenvrad.2005.04.007 -
M. Tzortzis, H. Tsertos, “Determination of thorium, uranium and potassium elemental concentrations in surface soils
in Cyprus,” J.
Environ. Radioact., vol. 77, no. 3, pp. 325 – 338, 2004.
DOI: 10.1016/j.jenvrad.2004.03.014