Electret Ion Chambers for Characterizing Indoor, Outdoor, Geologic and Other Sources of Radon
Payasada Kotrappa
An Electret Passive Environmental 222Rn Monitor Based on Ionization Measurement
Payasada Kotrappa, J.C. Dempsey, J.R. Hickey, L.R. Stieff
A Practical E-PERM® (Electret Passive Environmental Radon Monitor) System for Indoor 222Rn Measurement
Payasada Kotrappa, J.C. Dempsey, R.W. Hickey, L.R. Stieff
Elevation Correction Factors for E-PERM® Radon Monitors
Payasada Kotrappa, L.R. Stieff
Electret Ion Chamber Radon Monitors Measure Dissolved 222Rn in Water
Payasada Kotrappa, W.A. Jester
Field Test of Electret Ion Chambers for Environmental Monitoring
R.A. Fjeld, K.J. Montague, M.H. Haapala, P. Kotrappa
Long Term Stability of Electrets used in Electret Ion Chambers
Payasada Kotrappa
Uncertainties Evaluation for Electret Based Devices used in Radon Detection
M. Caresana, F. Campi, M. Ferrarini, L. Gariati, A. Porta
Gamma Table
Kenneth T. Bogen
Review of Electret Ion Chamber Technology for Measuring Technologically Enhanced Natural Radioactivity
Payasada Kotrappa
An Advanced E-PERM® System for Simultaneous Measurement of Concentrations of Radon Gas, Radon Progeny, Equilibrium Ratio and Unattached Radon Progeny
Payasada Kotrappa, F.R. Stieff, L.R. Stieff
Intercomparison of Radon and Radon Decay Product Measurements in an Underground Mine and EPA Radon Laboratory
G. Budd, R. Hopper, E. Braganza, M. Ronca-Battista, F. Steinhausler, P. Stegner
Attenuation of Thoron in Tyvek® Membranes
Payasada Kotrappa, Lorin Stieff, Frederick Stieff
Measurement of Radon in Natural Gas and in Propane Using Electret Ion Chambers
Payasada Kotrappa, Michael E. Kitto, Lorin Stieff, Frederick Stieff
Radon Flux Monitor For In Situ Measurement of Granite and Concrete Surfaces
Payasada Kotrappa, F.R. Stieff, Daniel J. Steck
Uranium Prospecting for Accurate Time-Efficient Surveys of Radon Emissions in Air and Water, with a Comparison to Earlier Radon and Helium Surveys
John D. Charlton, Payasada Kotrappa
Quality Study of Electret Radon Flux Monitors by an "In Situ" Intercomparison Campaign in Spain
C. Grossi, A. Vargas, D. Arnold
A Preliminary Comparison of Radon Surface Flux Measurement Using Large Area Activated Charcoal Canisters (LAACC) and Electret Ion Chambers (EIC)
J. Rechcigl, I. Alcordo, C. Roessler, R. Littell, H. Keaton, J. Williamson, L.R. Stieff, P. Kotrappa, G. Whitney
Assessment of the E-PERM® Radon-in-Water Measurement Kit
M. Kitto, D. Haines, E. Fielman, T. Menia, A. Bari
NAS Report and EPA's Approach to Setting Limits for Radon in Drinking Water
NAS Report / U.S. EPA
Initial EPA Perspectives on NAS Report: "Risk Assessment of Radon in Drinking Water"
U.S. Environmental Protection Agency
The Use of Barrier Bags with Radon Detectors
A. Stieff, P. Kotrappa, F.R. Stieff
Small Volume (53 ML) EIC With On/Off Mechanism
F.R. Stieff, P. Kotrappa
Electret Ion Chamber-Based Passive Radon-Thoron Discriminative Monitors
P. Kotrappa, D. Steck
Measurement of Indoor and Outdoor Radon Concentrations During Superstorm Sandy
P. Kotrappa, P. Paul, A. Stieff, F.R. Stieff
Short-Term Electret Ion Chamber "Blind" Testing Program
R.K. Lewis
Measuring Radon and Thoron Emanation from Concrete and Granite with Continuous Radon Monitors and E-PERMs
B. Brodhead
Influence of Environmental Changes on Integrating Radon Detectors: Results of an Intercomparison Exercise
A. Vargas, X. Ortega
Field Comparison of Commercially Available Short-Term Radon Detectors
K. Sun, M. Majdan, D. Field, R.W. Field
Blind Testing of Commercially Available Short-Term Radon Detectors
K. Sun, G. Budd, S. McLemore, R.W. Field
A Test of Radon Service Providers Available on the Internet
J. Chen, R. Falcomer, L. Bergman, J. Wierdsma, J. Ly
Evaluation Report: EPA Does Not Provide Oversight of Radon Testing Accuracy and Reliability
U.S. Environmental Protection Agency
Technical Note: Inherent Voltage Discharge in LT Electrets (16-May-2018)
Rad Elec Inc.
Optimized 90 Day Long-Term EIC Monitor (LMT-OO)
Payasada Kotrappa, Lorin Stieff, Frederick Stieff
New S-Chamber Mid-Term Electrets: Experimental Characterization and Uncertainty Evaluation
Gabriele Zorloni, Francesca Tugnoli, Luisella Garlati, Marco Caresana
Application of NIST 222Rn Emanation Standards for Calibrating 222Rn Monitors
Payasada Kotrappa, L.R. Stieff
Characterization and Use of an Accumulating Type of Radon Test Chamber
Payasada Kotrappa, Frederick Stieff
An E-RPISU, A New Instrument for Measurement of Radon Progeny Concentration in Air
Payasada Kotrappa, Frederick Stieff
Electret Enhances Transdermal Drug Permeation
Narasimha Murthy, Vishwanath Boguda, Payasada Kotrappa
Calibration of Electret-Based Integral Radon Monitors Using NIST Polyethylene-Encapsulated 226Ra / 222Rn Emanation (PERE) Standards
R. Colle, P. Kotrappa, J.M.R. Hutchinson
Time-Integrating Radon Gas Measurements in Domestic Premises: Comparison of Short-, Medium- and Long-term Exposures
C.J. Groves-Kirkby, A.R. Denman, R.G.M. Crockett, P.S. Phillips, A.C. Woolrdige, G.K. Gillmore
Advanced Calibration Equations for E-PERM® Electret Ion Chambers
Payasada Kotrappa, Alexandra Stieff, Frederick Stieff
Field Measurements of In Situ 222Rn Concentrations in Soil Based on the Prompt Decay of the 214Bi Counting Rate
L.R. Stieff, C.B. Stieff, R.A. Nelson
Measurement of Potential Alpha Energy Concentration of Radon and Thoron Daughters Using an Electret Dosemeter
P. Kotrappa, S.K. Dua, P.C. Gupta, N.S. Pimpale, A.H. Khan
Electrets to Measure Ion Concentration in Air
Payasada Kotrappa
Development of an Electret Passive Environmental Radon Monitor (E-PERMTM) - Phase Two
Payasada Kotrappa, J.C. Dempsey
Use of Electret Ionization Chambers to Measure Radon in Caves
Lawrence E. Welch, Brian E. Paul, Mark D. Jones
Correlating Environmental Variables with Radon Activity in an Iowa Cave
Lawrence E. Welch, Anna Takashima, Monica B. Miguel, Brigitte C. Layug, Mark D. Jones, Christopher L. Beck
Performance of Electret Ionization Chambers in Magnetic Field
Payasada Kotrappa, L.R. Stieff, T.F. Mengers, R.D. Shull
Electret Ion Chambers for Passive Measurement of Airborne Tritium: Theory and Practice
Payasada Kotrappa, T. Hobbs, D. Brown
The Use of Passive Detectors to Monitor Tritium On Surfaces
R.B. Gammage, K.E. Meyer, J.L. Brock
Evaluation of Electret Ion Chamber for Tritium Measurement
R.A. Surette, M.J. Wood
Evaluating the E-PERM RT Chamber for Use Measuring Rn-220 in a Cave Environment
Lawrence E. Welch, Emma J. Art, Garrett D. Rau, Matthew J. Frana, Edward C. Klausner, Elizabeth R. Miller, Mark D. Jones, Michael J. Lace
