Abstract:
:High-order decay equations are often difficult to study without significant care taken with variables and assumptions. As parent and progeny activities evolve over time, the effects of uncertainties and approximations confound the quality and interpretation of results. Of particular concern is the situation when decay equilibrium has been disturbed and progenies have arbitrary initial activities. To address this, code was created using Wolfram Mathematica to visualize the time-activity plots of the high order progenies of naturally occurring radioactive material after secular equilibrium is disturbed. The Bateman equation for an un-replenished parent was expanded to calculate activity vs. time for up to 13 progenies at different initial activities. The code uses the formula of Skrable et al., without parent production, expanded to the 13th progeny with arbitrary initial concentration. The code calculates and plots activity vs. time; it also reports the cumulative disintegrations of each progeny over a user-specified time period for comparison to counting measurements. The code could also be modified to incorporate additional production or branched decay schemes. We believe this code may be useful to health physicists and is intended to be accessible for anyone's use. This paper presents the code with explanations and examples on how to use it.
journal_name
Health Physjournal_title
Health physicsauthors
Wilson CA 4th,Hendrickson KR,Hamideh AM,Matthews KL 2nd,Wang WHdoi
10.1097/HP.0000000000000926subject
Has Abstractpub_date
2018-12-01 00:00:00pages
791-796issue
6eissn
0017-9078issn
1538-5159pii
00004032-201812000-00025journal_volume
115pub_type
杂志文章相关文献
HEALTH PHYSICS文献大全abstract::External gamma exposures from radionuclides deposited on surfaces usually result in the major contribution to the total dose to the public living in urban-industrial environments. The aim of the paper is to give an example for a calculation of the collective and averted collective dose due to the contamination and dec...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/00004032-200402000-00007
更新日期:2004-02-01 00:00:00
abstract::The Department of Health and Human Services (DHHS) was directed by Congress to assess the risk of thyroid cancer from 131I associated with fallout from the atmospheric testing of nuclear weapons at the Nevada Test Site. The National Cancer Institute (NCI) was requested by DHHS to address Public Law 97-414, Section 7 (...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/00004032-199011000-00002
更新日期:1990-11-01 00:00:00
abstract::Spot urine samples are often taken for emergency radiobioassay to provide a quick dose assessment for contaminated individuals. The subsequent dosimetric analysis requires a urinary output normalization method to adjust spot sampling to daily urine excretion. A rapid specific gravity method that was developed for 24-h...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/HP.0b013e318213be69
更新日期:2011-08-01 00:00:00
abstract::Eleven years after the accidental loss of nuclear weapons in 1968, the fourth scientific expedition to Thule occurred. The estimated inventory of 1 TBq 239,240Pu in the marine sediments was unchanged when compared with the estimate based on the 1974 data. Plutonium from the accident had moved further away from the imp...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/00004032-198401000-00001
更新日期:1984-01-01 00:00:00
abstract::The CASTEAUR project proposes a simplified tool to assess the transfer of radionuclides between and in the main biotic and abiotic components of the freshwater ecosystem. Applied to phenomenological modeling, various hypotheses simplify the transfer equations, which, when programmed under Excel, can be readily dispatc...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/00004032-200210000-00013
更新日期:2002-10-01 00:00:00
abstract::Everyone will agree that specialized computer programs have done away with the many tedious tasks associated with manually keeping track of radioisotopes. Enhanced electronic programs have virtually cut the time of managing radioisotopes. Agriculture and Agri-Food, Canada's (AAFC) program for the management of radiois...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/01.HP.0000308501.32700.f1
更新日期:2008-05-01 00:00:00
abstract::This survey measured radiofrequency (RF) fields from wireless local area networks (WLANs) using Wi-Fi technology against a background of RF fields in the environment over the frequency range 75 MHz-3 GHz. A total of 356 measurements were conducted at 55 sites (including private residences, commercial spaces, health ca...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/01.HP.0000248117.74843.34
更新日期:2007-03-01 00:00:00
abstract::The Pantex Plant significantly revised its Radiological Control Manual to improve its usability, streamline plant procedures, and clarify conflicting guidance. This article overviews the process used to develop the new Radiological Control Manual. ...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/00004032-200202001-00007
更新日期:2002-02-01 00:00:00
abstract::The threat of radiation exposure from warfare or radiation accidents raises the need for appropriate animal models to study the acute and chronic effects of high dose rate radiation exposure. The goal of this study was to assess the late development of fibrosis in multiple organs (kidney, heart, and lung) in survivors...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/HP.0000000000000357
更新日期:2015-11-01 00:00:00
abstract::The aim of this paper is to compare and contrast the needs for biodosimetry for initial triage for military forces and civilian populations when there are radiation exposures that involve potentially a large number of persons. Several differences in the likely scenarios for exposure of military forces include a greate...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/HP.0000000000000069
更新日期:2014-06-01 00:00:00
abstract::Increasing audience knowledge is often set as a primary objective of risk communication efforts. But is it worthwhile focusing risk communication strategies solely on enhancing specific knowledge? The main research questions tackled in this paper were: (1) if prior audience knowledge related to specific radiation risk...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/HP.0b013e31823fb5a5
更新日期:2012-06-01 00:00:00
abstract::Tests were conducted to characterize the uniformity of velocity and tracer gas profiles in a square and a rectangular duct with respect to defining the suitability of locations for single point sampling of gaseous contaminants. Several configurations, such as a straight duct with unidirectional flow at the entrance se...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/01.HP.0000203325.62672.39
更新日期:2006-07-01 00:00:00
abstract::The prevalence of thyroid nodules and thyroid cancer was studied in the indigenous population residing on Ebeye Island, Kwajalein Atoll, in the Republic of the Marshall Islands. This island, centrally located in the nation, is home to about 25% of the nation's population, many who have migrated there from other atolls...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/00004032-199707000-00017
更新日期:1997-07-01 00:00:00
abstract::Radio frequency currents in the human body, induced by high-frequency and medium-frequency high-power broadcast antennas, were studied theoretically and experimentally. An analytical formula was derived to calculate the foot currents in a grounded semispheroidal model of the human body. The model agrees within 30% wit...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/00004032-199403000-00001
更新日期:1994-03-01 00:00:00
abstract::The objectives of this research were (1) to analyze the transfers of 137Cs and 60Co in a retention pond, with emphasis on aquatic insects and (2) to determine if detectable concentrations of these radionuclides are exported by emerging aquatic insects. We analyzed the radionuclide concentrations in the following compo...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/00004032-198511000-00010
更新日期:1985-11-01 00:00:00
abstract::The Mayak Production Association (MPA) worker registry has shown evidence of plutonium-induced health effects. Workers were potentially exposed to plutonium nitrate [(239)Pu(NO(3))(4)] and plutonium dioxide ((239)PuO(2)). Studies of plutonium-induced health effects in animal models can complement human studies by prov...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/HP.0b013e3181b97318
更新日期:2010-01-01 00:00:00
abstract::For the purpose of improving retrospective internal thyroid dose estimations for children and adolescents following the Chernobyl accident, age- and gender-dependent thyroid masses have been estimated for the children of Kiev and Zhytomyr oblasts, which are two of the most contaminated regions of Northern Ukraine. For...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/HP.0b013e31826e188e
更新日期:2013-01-01 00:00:00
abstract::The concentration of 220Rn in the exhaled breath of workers currently employed in a Th plant was measured using a double filter system. The results are expressed in terms of the equivalent activity of 224Ra freely emanating 220Rn at the mouth. Measurements performed on 176 subjects, without isolating them from day-to-...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/00004032-198612000-00004
更新日期:1986-12-01 00:00:00
abstract::Measurements of the effective diffusion coefficient, De, of 222Rn in concrete are important for accurate determination of transport mechanisms and computer modeling of radon entry into structures. A method for in-situ determination of De as well as the emanation fraction, F, is described. It is based on continuous mea...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/00004032-199506000-00008
更新日期:1995-06-01 00:00:00
abstract::This commentary evaluates two sets of guidelines for human exposure to radiofrequency (RF) energy, focusing on the frequency range above the "transition" frequency at 3-10 GHz where the guidelines change their basic restrictions from specific absorption rate to incident power density, through the end of the RF band at...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/HP.0000000000000671
更新日期:2017-07-01 00:00:00
abstract::Following a large-scale radiation emergency, affected populations will need to be screened soon after for potential contamination (external or internal). Effective management of the available resources can help maximize the screening throughputs. This paper reports the modeling results for screening throughputs in a p...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/HP.0000000000000114
更新日期:2014-05-01 00:00:00
abstract::Since the mid-1940s, hundreds of thousands of workers have been engaged in nuclear weapons-related activities for the U.S. Department of Energy (DOE) and its predecessor agencies. In 2000, Congress promulgated the Energy Employees Occupational Illness Compensation Program Act of 2000 (EEOICPA), which provides monetary...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/HP.0000000000000008
更新日期:2014-02-01 00:00:00
abstract::In the assessment of risk, several factors affect predictions: selection of reactive agent, selection of tumor incidence data, modeling of dose, scaling across species, adjustment for differences in duration and frequency of exposure, and selection of the most suitable risk extrapolation model. If the endpoints, expos...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/00004032-198907001-00046
更新日期:1989-01-01 00:00:00
abstract::A group of workers internally contaminated with Am have been followed for about 12 years. The source of contamination was AmO2 powder used for production of AmBe neutron sources and other applications. The production of some radionuclide sources included chemical treatment of the original material, which transformed t...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/HP.0b013e3181d18e2e
更新日期:2010-10-01 00:00:00
abstract::A study on absorption of radon by different edible oils of plant origins produced and used in India was conducted in order to identify efficient radon-absorbing oils. A comparative study of radon absorption by edible oils of India with that of olive oil, which is known as a good absorber of radon, was also carried out...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/HP.0b013e3181c9f7be
更新日期:2010-04-01 00:00:00
abstract::ISABELLE is a high-intensity 400-GeV proton-storage ring under construction at Brookhaven National Laboratory (BNL). The radiation-protection problems encountered in its design are in many ways similar to those at high-energy fixed-target facilities: both the laboratory personnel nearby and the public several kilomete...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/00004032-198401000-00010
更新日期:1984-01-01 00:00:00
abstract::The natural radioactivity in some rock samples in Ikogosi-Ekiti, Southwestern Nigeria, has been measured using a very sensitive gamma spectroscopic system consisting of a 76 mm x 76 mm NaI(TI) scintillation detector system coupled to a versatile Canberra Series 10 plus multichannel analyzer. The average concentrations...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/00004032-200008000-00013
更新日期:2000-08-01 00:00:00
abstract::Count rates were measured as a function of distance from a planar concrete reflector for a set of eight Bonner-sphere detectors and four isotopic neutron sources. These data can be used to determine the contributions of scattered neutrons to the response of moderated detectors used in environments bounded by concrete....
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/00004032-199009000-00008
更新日期:1990-09-01 00:00:00
abstract::Accidental exposure to depleted or enriched uranium may occur in a variety of circumstances. There is a need to quantify such exposure, with the possibility that the testing may post-date exposure by months or years. Therefore, it is important to develop a very sensitive test to measure precisely the isotopic composit...
journal_title:Health physics
pub_type: 杂志文章
doi:10.1097/01.hp.0000174809.43871.54
更新日期:2006-02-01 00:00:00
abstract::Medical health physics is the profession dedicated to the protection of healthcare providers, members of the public, and patients from unwarranted radiation exposure. Medical health physicists must be knowledgeable in the principles of health physics and in the applications of radiation in medicine. Advances in medica...
journal_title:Health physics
pub_type: 杂志文章,评审
doi:10.1097/00004032-200405000-00001
更新日期:2004-05-01 00:00:00