Applied Radiation and Isotopes This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Carbon analysis of large soil samples using the tagged neutron method: Accounting for radiation attenuation
Appl Radiat Isot. 2024 Apr 25;209:111332. doi: 10.1016/j.apradiso.2024.111332. Online ahead of print.ABSTRACTNon-destructive methodology for determining carbon content in large or semi-infinite (soil) samples is discussed. This methodology is based on deconvoluting the sample's gamma spectra (received by tagged neutron method) on the sample component's spectra by accounting for neutron and gamma radiation attenuations. This algorithm was tested with both Monte-Carlo simulations and experimental gamma spectra. Good agreement was found between defined and actual sample component content. Application of this method for soil c...
Source: Applied Radiation and Isotopes - May 2, 2024 Category: Radiology Authors: Aleksandr Kavetskiy Galina Yakubova Stephen A Prior H Allen Torbert Source Type: research

Cd-content and temperature dependences of hyperfine fields in Cd x Fe 3-x O 4 
Appl Radiat Isot. 2024 Apr 16;209:111320. doi: 10.1016/j.apradiso.2024.111320. Online ahead of print.ABSTRACTCd-content and temperature dependences of hyperfine fields in CdxFe3-xO4 (0 ≤ x ≤ 0.5) were investigated by means of time-differential perturbed angular correlation spectroscopy with the 111Cd(←111In) probe. It was found that Cd2+ ions selectively occupy the tetrahedral A site in the spinel structure in all the range of the present Cd content x. The magnetic transition temperature TC becomes lower with increasing x due to the interference of the long-range ordering of Fe spins as a result of expansion of the l...
Source: Applied Radiation and Isotopes - April 27, 2024 Category: Radiology Authors: W Sato M Fujii M Konaka T Ito H Hirahara S Komatsuda A Taniguchi Y Ohkubo Source Type: research

Estimation of alpha exposure on CR-39 detector using a UV-VIS spectrophotometer
Appl Radiat Isot. 2024 Apr 23;209:111331. doi: 10.1016/j.apradiso.2024.111331. Online ahead of print.ABSTRACTThis work is dedicated to study the possibility of using UV-VIS spectrophotometer, a non-invasive technique with a versatile applications that is being used to determine the optical properties of matter, to estimate the CR-39 exposure to alpha particles. CR-39 detectors were exposed to alpha particles from two different alpha sources: 241Am and radon gas. Tracks densities on CR-39 were determined using the traditional counting method by an optical microscope. The transmittances of CR-39 detectors were measured using...
Source: Applied Radiation and Isotopes - April 26, 2024 Category: Radiology Authors: H Alameri Y Abou-Ali M H Obeid R Shweikani Source Type: research

Theoretical investigations on the laser isotope separation of 175 Yb for medical applications
Appl Radiat Isot. 2024 Apr 21;209:111328. doi: 10.1016/j.apradiso.2024.111328. Online ahead of print.ABSTRACTThe possibility of laser isotope separation of 175Yb from irradiated natural Yb has been investigated. The optimum process parameters such as powers and bandwidths of the lasers, Doppler broadening and the number density of the atoms have been derived through density matrix calculations. It has been shown that it is possible to produce 175Yb (>42% enriched) at a production rate of 62 μg/hour (or 1.5 mg/day). This corresponds to the production rate of 1350 patient doses (of 7.4 GBq each) per day. The radionuclidi...
Source: Applied Radiation and Isotopes - April 25, 2024 Category: Radiology Authors: M Sankari M V Suryanarayana Source Type: research

Carborane-FAPI conjugate: A potential FAP-targeted boron agent with improved boron content
Appl Radiat Isot. 2024 Apr 23;209:111330. doi: 10.1016/j.apradiso.2024.111330. Online ahead of print.ABSTRACTBoron neutron capture therapy (BNCT) has received extensive attention as an advanced binary radiotherapy method. However, BNCT still faces poor selectivity of boron agent and is insufficient boron content in tumor tissues. To improve the tumor-targeted ability and boron content, this research aims to design, synthesize and preliminary evaluate a new borane agent Carborane-FAPI, which coupling the o-carborane to the compound skeleton of a mature fibroblast activating protein (FAP) inhibitor (FAPI). FAP is a tumor-ass...
Source: Applied Radiation and Isotopes - April 24, 2024 Category: Radiology Authors: Juan Zhang Yanyan Wu Wei Lu Yi Xiao Shiyuan Liu Jiahui Yu Source Type: research

Study of dead time estimation method based on pulse interval distribution
This study aims to propose a method for estimating dead time at high counting rate. First of all, a measurement system of pulse interval distribution was used to estimate the true input counting rate of the detection system and implemented in FPGA. Then, a digital pole-zero cancellation technique was introduced in the measurement system to decrease the decay time constant of pulse. This was aimed at mitigating the impact of pile-up on the pulse interval distribution spectrum, especially at high counting rate. The feasibility of this measurement system at high counting rate was verified by the experimental platform of EDXRF...
Source: Applied Radiation and Isotopes - April 22, 2024 Category: Radiology Authors: Junlong Liu Xu Hong Haixi Huang Xinru Song Lin Li Chengzhuo Zhou Source Type: research

Use of Zernike moments to characterize dose conformity for radiotherapy treatment plans
Appl Radiat Isot. 2024 Apr 12;209:111322. doi: 10.1016/j.apradiso.2024.111322. Online ahead of print.ABSTRACTDose conformity is an essential parameter used in radiotherapy and radiosurgery that measures the correspondence of the dose distribution derived from a Treatment Planning System (TPS) with the actual volume to be treated, the Planning Treatment Volume (PTV). The present work uses a method based on the expansion of dose distributions and PTVs by three-dimensional Zernike polynomials and further comparison of their moments to define a general criterion of dose conformity. To carry on this study, data coming from 20 p...
Source: Applied Radiation and Isotopes - April 20, 2024 Category: Radiology Authors: Guido Mora Miguel Mart ín-Landrove Source Type: research

Isodose mapping of terrestrial gamma radiation in Sarawak-Borneo: Insights from surface-weathered soil analysis
In conclusion, this study has successfully revealed the relationship between TGR dose rates and superficial-weathered soil in Sarawak-Borneo. While the linear relationship is applicable to the Sundaland-Borneo tectonic block, it has potential to be used as a valuable tool for spatial inference of TGR dose rates in isodose development with similar lithologial characteristics, aiding in radiation exposure assessment and environmental monitoring.PMID:38642443 | DOI:10.1016/j.apradiso.2024.111327 (Source: Applied Radiation and Isotopes)
Source: Applied Radiation and Isotopes - April 20, 2024 Category: Radiology Authors: H N Idris M S M Sanusi A T Ramli M R M Solleh F Yahaya M Z Ya'cob W B Siong Source Type: research