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Published: Krishnakumar Nangeelil, Peter Dimpfl, Zaijing Sun

Krishnakumar Nangeelil, Peter Dimpfl, Zaijing Sun (all Health Physics and Diagnostic Sciences), Shichun Huang (Currently faculty at UTK, a former member of the Department of Geosciences at UNLV), and Mayir Mamtimin (Halliburton) published an article entitled “Preliminary Study on Forgery Identification of Hetian Jade with Instrumental Neutron Activation Analysis” in Applied Radiation and Isotopes. The study indicates that INAA can be applied qualitatively to identify similarities and differences in the elemental composition and quickly distinguish the counterfeit from the genuine Hetian jade. Peter Dimpfl is a recent master graduate in Medical Physics.

Presentation: Zaijing Sun, Krishnakumar Nangeelil

Zaijing Sun and Krishnakumar Nangeelil (both Health Physics and Diagnostic Sciences) recently gave oral presentations at the 26th International Conference on the Application of Accelerators in Research and Industry in Denton, Texas. Sun’s talk is titled, “Developing a Remote Gamma Spectra Collection System for Radiation Sciences at UNLV,” and Nangeelil’s talk is titled, “Determination of heavy elements in water and sediment along the Savannah river using Instrumental Neutron Activation Analysis.”

Published: Krishnakumar Nangeelil, Christina Hall, Zaijing Sun

Krishnakumar NangeelilChristina Hall, and Zaijing Sun (all Health Physics and Diagnostic Sciences) and their collaborator, Wesley Frey at the McClellan Nuclear Research Center of the University of California Davis, published an article titled, “Biomarker response of Spanish moss to heavy metal air pollution in the low country of the Savannah River basin,” in the Journal of Radioanalytical and Nuclear Chemistry.

The neutron activation of this study was done at the UC Davis reactor, the most powerful TRIGA reactor in universities. The results indicate that Spanish moss is an ideal biomarker for air quality monitoring, and there is a significant enhancement of heavy metal concentrations for Spanish moss living in high-traffic zones. Nangeelil is a postdoctoral scholar in the School of Integrated Health Sciences, and Hall is a graduate student majoring in environmental health physics.

Published: Krishnakumar Nangeelil and Zaijing Sun

Krishnakumar Nangeelil and Zaijing Sun (both Health Physics and Diagnostic Sciences) and their collaborators, Cai Qingseng and Scott Lassell of the Department of Nuclear Engineering at the North Carolina State University, published an article titled “Investigation of Heavy Metals in Cottonseeds with Instrumental Neutron Activation Analysis (INAA)” in the Journal of Radioanalytical and Nuclear Chemistry. The study was conducted by neutron activation with the PULSTAR reactor. The results indicate that cottonseeds from several counties of South Carolina exhibited a consistent and similar elemental absorption pattern for heavy elements, and Zn, Co, Rb are the most abundant heavy metal pollutants identified in cottonseeds produced near the superfund sites listed by EPA.

Christina Hall defended her thesis proposal

Christina Hall successfully defended her thesis proposal entitled “Assessing Air Pollution Using Spanish Moss as a Bioindicator in the Low Country of Savannah River Basin“ on July 14, 2022. She proposed to study the pollutants in Spanish Moss with the Instrumental Neutron Activation Analysis. The committee includes Dr. Zaijing Sun (chair), Dr. Steen Madsen, Dr. Carson Riland, and Dr. Alexander Barzilov.

Peter Dimpfl passed his thesis defense

Peter Dimpfl successfully defended his thesis entitled “Monte Carlo Simulation of Thallium-Bromide Semiconductor Detector for Range Verification of a Carbon Ion Radiotherapy Beam Through Prompt Gamma-Ray Detection” on June 17, 2022. In this study, Monte Carlo simulations were completed to evaluate TlBr performance in the detection of prompt gamma rays generated from the irradiation of a Polymethyl methacrylate (PMMA) phantom with carbon ions. TlBr was able to detect the prompt Gamma-Ray profiles of three different materials (cortical bone, adipose tissue, PMMA) with correlation to actual simulated Bragg peaks. The committee includes Dr. Yu Kuang (chair), Dr. Zaijing Sun, Dr. Steen Madsen, and Dr. Hui Zhao.

Published: Biswaljit Biswal and Zaijing Sun

Zaijing Sun (Health Physics and Diagnostic Sciences of UNLV) and his collaborators,  Biswajit Biswal (Mathematics and Computer Sciences of SCSU), and Andrew Duncan (Material Sciences and Technology of SRNL) published an article “ADA: Advanced Data Analytics Methods for Abnormal Frequent Episodes in the Baseline Data of ISD” in the Journal of Nuclear Engineering and Technology. In this study, Advanced Data Analytics (ADA) methods are applied to the big data generated by the In-situ Decommissioning (ISD) Sensor Network Test Bed at the Savannah River Site. Advanced analytics engine, a framework of data analytics, feature engineering, and machine learning, is introduced to discover abnormal frequent episodes in the big datasets, which lead to the early indicators of ISD system failures.

Christina Hall gave a presentation at the CIRMS 2022 Meeting

Christina Hall successfully gave a presentation entitled “Assessing Air Pollution with Spanish Moss as a Bioindicator in the Low Country of Savannah River Basin “at the 29th Annual Meeting of CIRMS “Trusting Radiation Science: Measuring what cannot be seen”. Her study indicated the correlations between the concentration of heavy metals in Spanish Moss and the level of air pollution in the rural, low traffic, and high traffic area.

Presentation: Zaijing Sun, Krishnakumar Divakar Nangeelil, Peter Dimpfl, and Christina Hall

Krishnakumar Divakar Nangeelil, Peter Dimpfl, Christina Hall and Zaijing Sun (all Health Physics & Diagnostic Sciences), along with colleagues from other institutions, recently presented papers at the On Methods and Applications of Radioanalytical Chemistry (MARC-XII) in Kailua Kona, Hawaii.

Nangeelil, Hall, Sun, and Wesley Frey presented a paper, “Assessing Air Pollution with Spanish Moss as a Bioindicator in the Low Country of Savannah River Basin.”

Dimpfl, Nangeelil, Sun, and Mayir Mamtimin presented a paper, “Forgery Identification of Hetian Jade with Instrumental Neutron Activation Analysis (INAA).”

Sun, Nangeelil, Qingseng Cai and Scott Lassell presented a paper, “Determining Trace Elements in Cottonseeds with Instrumental Neutron Activation Analysis (INAA).”

Dimpfl and Hall are graduate students.