Search Results - "Semkow, Thomas M"

Long-term monitoring of radioactivity in fish from New York waters by Kitto, Michael E., Marrantino, Joseph C., Fielman, Eileen M., Haines, Douglas K., Semkow, Thomas M., Bari, Abdul

“…As part of an environmental surveillance program operated by the New York State (NYS) Department of Health, measurements of various radionuclides in aquatic…”
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Detection Capability of 89Sr and 90Sr Using Liquid Scintillation Counting by Blain, Ezekiel, Nishikawa, Kimi, Faye, Sherry A., Roselan, Amy, Burn, Adam G., Torres, Miguel A., Semkow, Thomas M.

“…We developed a new method for simultaneous determination of 89Sr and 90Sr with an emphasis on detectability. The samples were digested, and Sr was chemically…”
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Investigation of neutron shielding materials for low-background gamma spectrometry by Khan, Abdul J., Li, Xin, Haines, Douglas K., Hoffman, Timothy J., Semkow, Thomas M.

“…In gamma spectrometers located at ground-level or in shallow-underground laboratories, muon-induced neutrons contribute significantly to the background. We…”
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Gamma Radioactivity Detection Limits and Associated Radionuclide Intakes Study in Artificial Human Urine Using Sodium-iodide and High-purity Germanium Detectors by Burn, Adam G., Haines, Douglas K., Khan, Abdul J., Torres, Miguel A., Faye, Sherry A., Costello, Cynthia A., Hoffman, Timothy J., Chu, Liang T., Bradt, Clayton J., Semkow, Thomas M.

“…The performance of several gamma detectors was investigated for emergency urine bioassay screening of two radionuclides of concern: 131 I and 137 Cs. Unspiked…”
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Homogenization of food samples for gamma spectrometry using protease by Nishikawa, Kimi, Bari, Abdul, Khan, A. J., Li, Xin, Menia, Traci, Semkow, Thomas M.

“…We previously reported a food preparation method for gamma spectrometry during radiological emergencies aimed at developing best compromises between degree of…”
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Homogenization of food samples for gamma spectrometry using tetramethylammonium hydroxide and enzymatic digestion by Nishikawa, Kimi, Bari, Abdul, Khan, Abdul Jabbar, Li, Xin, Menia, Traci, Semkow, Thomas M., Lin, Zhichao, Healey, Stephanie

“…We have developed a method of food sample preparation for gamma spectrometry involving the use of tetramethylammonium hydroxide (TMAH) and/or enzymes such as…”
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Improved sample preparation procedure for gross alpha counting on gas-flow proportional counter by Burn, Adam G., Li, Xin, Haines, Douglas K., Hussain, Mirza M., Yang, Karl X., Marrantino, Joseph C., Syed, Umme-Farzana, Bari, Abdul, Semkow, Thomas M.

“…Sample residue uniformity is crucial for accurate gross alpha counting using a gas-flow proportional counter, however this can be difficult to achieve using…”
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Demonstration of fundamental statistics by studying timing of electronics signals in a physics-based laboratory by Beach, Shaun E., Semkow, Thomas M., Remling, David J., Bradt, Clayton J.

“…We have developed accessible methods to demonstrate fundamental statistics in several phenomena, in the context of teaching electronic signal processing in a…”
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Radon measurement of natural gas using alpha scintillation cells by Kitto, Michael E., Torres, Miguel A., Haines, Douglas K., Semkow, Thomas M.

“…Due to their sensitivity and ease of use, alpha-scintillation cells are being increasingly utilized for measurements of radon (222Rn) in natural gas…”
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Radiochemical analysis of a wide range of 131I activities in water and milk using well-type germanium detector by Li, Xin, Semkow, Thomas M., Bradt, Clayton J., Syed, Umme-Farzana, Bari, Abdul, Torres, Miguel A., Nishikawa, Kimi, Khan, Abdul J., Menia, Traci A.

“…We report a study of a fast radiochemical method to determine the activity of 131 I via the radiochemical recovery obtained with a 129 I tracer. Previous…”
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Airborne gamma-ray emitters from Fukushima detected in New York State by Kitto, Michael E., Menia, Traci A., Haines, Douglas K., Beach, Shaun E., Bradt, Clayton J., Fielman, Eileen M., Syed, Umme-Farzana, Semkow, Thomas M., Bari, Abdul, Khan, A. J.

“…An air-sampling network that operates continuously as part of New York State’s environmental surveillance program collected radionuclides emitted as a result…”
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Radioactivity in Trinitite six decades later by Parekh, Pravin P., Semkow, Thomas M., Torres, Miguel A., Haines, Douglas K., Cooper, Joseph M., Rosenberg, Peter M., Kitto, Michael E.

“…The first nuclear explosion test, named the Trinity test, was conducted on July 16, 1945 near Alamogordo, New Mexico. In the tremendous heat of the explosion,…”
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EXPERIMENTAL VERIFICATION OF OVERDISPERSION IN RADIOASSAY DATA by Semkow, Thomas M

“…ABSTRACT—New evidence is provided suggesting that radioassay data are frequently overdispersed with respect to the Poisson distribution. Twelve cases of…”
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Detection capability of environmental alpha spectrometry: I. Precision and accuracy by Faye, Sherry A., Burn, Adam G., Torres, Miguel A., Haines, Douglas K., Semkow, Thomas M.

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Mobilization of thorium, radium and radon radionuclides in ground water by successive alpha-recoils by Sun, Hongbing, Semkow, Thomas M.

“…Alpha-recoil is an important way for the mobilization of α-decay daughters in ground water. The processes of decay and recoil from 238U to 222Rn and from 232Th…”
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LONG-TERM MONITORING OF RADIOACTIVITY IN SURFACE AIR AND DEPOSITION IN NEW YORK STATE by Kitto, Michael E, Fielman, Eileen M, Hartt, Greg M, Gillen, Elizabeth A, Semkow, Thomas M, Parekh, Pravin P, Bari, Abdul

“…Gross-beta activities have been determined weekly for 22 y from filtered atmospheric aerosols at seven sites in New York State. The activities, ranging from…”
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Detection capability study of 89Sr and 90Sr from accidental releases using liquid scintillation counting by Blain, Ezekiel, Nishikawa, Kimi, Faye, Sherry A., Roselan, Amy, Burn, Adam G., Torres, Miguel A., Semkow, Thomas M.

“…We developed a new method for simultaneous determination of 89 Sr and 90 Sr with an emphasis on detectability. The samples were digested and Sr was chemically…”
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PRINCIPLES OF GROSS ALPHA AND BETA RADIOACTIVITY DETECTION IN WATER by Semkow, Thomas M, Parekh, Pravin P

“…ABSTRACT—A simultaneous detection of gross alpha and beta radioactivity was studied using gas proportional counting. This measurement is a part of a method…”
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Gamma Radioactivity Detection Limits and Associated Radionuclide Intakes Study in Artificial Human Urine Using Sodium-iodide and High-purity Germanium Detectors by Burn, Adam G., Haines, Douglas K., Khan, Abdul J., Torres, Miguel A., Faye, Sherry A., Costello, Cynthia A., Hoffman, Timothy J., Chu, Liang T., Bradt, Clayton J., Semkow, Thomas M.

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Fractal approach to the solid-particle environmental radioactivity by Semkow, Thomas M.

“…A model of solid particle, based on fractal geometry of surfaces, was developed to describe the distribution of radioactivity in the natural environment…”
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