Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Thomas M, Semkow"'
Autor:
Adam G. Burn, Douglas K. Haines, Abdul J. Khan, Miguel A. Torres, Sherry A. Faye, Cynthia A. Costello, Timothy J. Hoffman, Liang T. Chu, Clayton J. Bradt, Thomas M. Semkow
Publikováno v:
Health Physics. 124:106-112
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44a9e996c95ba7d5ef25ae48dd1b3559
https://doi.org/10.1097/hp.0000000000001642
https://doi.org/10.1097/hp.0000000000001642
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 328:941-950
In gamma spectrometers located at ground-level or in shallow-underground laboratories, muon-induced neutrons contribute significantly to the background. We studied several neutron-shielding materials including water, pure polyethylene (PPE), borated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bfdd9e5a053d8adb93e85af5be3ceda
https://doi.org/10.1007/s10967-021-07715-x
https://doi.org/10.1007/s10967-021-07715-x
Publikováno v:
Journal of Applied Mathematics and Physics. :2641-2659
In gamma spectrometry of voluminous samples, inhomogeneous distribution of radioactivity caused by the presence of hot particles can create significant Bias in the results of activity determinations. We developed a novel method to reduce this Bias us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a265a32512872e5e6ffe0d56c4f5bd8f
https://doi.org/10.4236/jamp.2021.911170
https://doi.org/10.4236/jamp.2021.911170
Publikováno v:
Journal of Applied Mathematics and Physics. :1522-1540
In this work, we addressed the inhomogeneity problem in gamma spectrometry caused by hot particles, which are dispersed into environment from large nuclear reactor accidents such as at Chernobyl and Fukushima. Using Monte Carlo simulation, we have de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b12a9ad232f09fe0dddfb1930e7a812
https://doi.org/10.4236/jamp.2021.97104
https://doi.org/10.4236/jamp.2021.97104
Autor:
Adam G. Burn, Xin Li, A. Bari, Mirza M. Hussain, Douglas K. Haines, Karl X. Yang, Joseph C. Marrantino, Thomas M. Semkow, Umme-Farzana Syed
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 325:417-423
Sample residue uniformity is crucial for accurate gross alpha counting using a gas-flow proportional counter, however this can be difficult to achieve using conventional procedures. An evaporation method using a 1:1 mixture of deionized water and 2-p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47eba959717cbbe44a8ff30b7a86cc7f
https://doi.org/10.1007/s10967-020-07256-9
https://doi.org/10.1007/s10967-020-07256-9
Autor:
Thomas M. Semkow, Xin Li
Publikováno v:
Journal of Applied Mathematics and Physics. :31-45
A new mathematical model for elucidating neutrino mass from beta decay is proposed. It is based upon the solutions of transformed Fredholm and Abel integral equations. In principle, theoretical beta-particle spectra can consist of several neutrino-ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::946bb889d1b0aceee5f5ddc98a884a0a
https://doi.org/10.4236/jamp.2019.71004
https://doi.org/10.4236/jamp.2019.71004
Autor:
Douglas K. Haines, Xin Li, Adil Khan, Adam G. Burn, Kimi Nishikawa, Liang T. Chu, A.J. Khan, A. Bari, Thomas M. Semkow, Umme-Farzana Syed, Nicole Freeman
Publikováno v:
Journal of Applied Mathematics and Physics. :1786-1799
We describe two new derivations of the chi-square distribution. The first derivation uses the induction method, which requires only a single integral to calculate. The second derivation uses the Laplace transform and requires minimum assumptions. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2279d41616b55eb8fac96a170ef64d2f
https://doi.org/10.4236/jamp.2019.78122
https://doi.org/10.4236/jamp.2019.78122
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 318:401-406
We previously reported a food preparation method for gamma spectrometry during radiological emergencies aimed at developing best compromises between degree of homogenization, accuracy, speed, and minimizing laboratory equipment contamination. We now
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1775e85d701b6a70b574ef82b136d6fc
https://doi.org/10.1007/s10967-018-6065-0
https://doi.org/10.1007/s10967-018-6065-0
Autor:
Kimi Nishikawa, A.J. Khan, Traci A. Menia, A. Bari, Thomas M. Semkow, Xin Li, Zhichao Lin, Stephanie Healey
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 314:859-870
We have developed a method of food sample preparation for gamma spectrometry involving the use of tetramethylammonium hydroxide (TMAH) and/or enzymes such as α-amylase or cellulase for sample homogenization. We demonstrated the effectiveness of this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cdd7b594d8edb11c6592eda02238fcd
https://doi.org/10.1007/s10967-017-5434-4
https://doi.org/10.1007/s10967-017-5434-4
Publikováno v:
American Journal of Physics. 85:515-521
We have developed accessible methods to demonstrate fundamental statistics in several phenomena, in the context of teaching electronic signal processing in a physics-based college-level curriculum. A relationship between the exponential time-interval
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d637272718299ba422b99deffd362b25
https://doi.org/10.1119/1.4982165
https://doi.org/10.1119/1.4982165