Technical Papers

Profile SP (P-type) HPGe Detectors - Premium Resolution at Low to Medium Energies (Low Noise Back Contact [LNBC])
Elaine G. Roth, Gregor Geurkov, Teresa Underwood, and Kyle T. Schmitt, ORTEC, (Presented at IEEE NSS/MIC, Nov. 2016, Strasbourg, France)

Improved Efficiency at Low Energies with P-Type High Purity Germanium Detectors (Stable Thin Front Contact [STFC])
Kyle T. Schmitt, Gregor Geurkov, Elaine G. Roth, Timothy R. Twomey, and Teresa Underwood, ORTEC, (Presented at IEEE NSS/MIC, Nov. 2016, Seattle, WA)

Performance Characteristics of a Low Background Germanium Well Detector for Low Energy Gamma Ray Nuclides
Ronald M. Keyser, ORTEC (ERA Conference, October 2010)

Performance of a Low Background High Purity Germanium Detector with a Novel Endcap
Ronald M. Keyser, Timothy R. Twomey, and David Gunter, ORTEC (INMM July 2006)

Extended Source Sensitivity and Resolution Comparisons of Several HPGe Detector Types with Low Energy Capabilities
R.M. Keyser and T.R. Twomey, ORTEC (Presented at INMM, July 2004)

Efficiency for Close Geometries and Extended Sources of A P-Type Germanium Detector with Low Energy Sensitivity
R.M. Keyser and T.R. Twomey, ORTEC (Presented at MTAA-11, June 2004)

Best Choice of High Purity Germanium (HPGe) Detector
The choice of the best HPGe detector for your particular measurement situation is based on a few simple rules. The rules are given and are based on some basic concepts about how the detection process works, how gamma rays penetrate materials, and the principles of gamma-ray spectroscopy.
T. Twomey, ORTEC, Oct. 2003

The Evaluation of True Coincidence Summing Effect on CTBTO-type Sample Geometry
R.M. Keyser, ORTEC (Presented at IEEE NSS Oct. 2003)

Efficiency and Resolution of Germanium Detectors as a Function of Energy and Incident Geometry
R.M. Keyser, ORTEC, and W.K. Hensley, Pacific Northwest National Laboratory (Presented at MARC, Apr. 2003)

Efficiency and Resolution of Germanium Detectors as a Function of Energy and Incident Geometry
R.M. Keyser, ORTEC, and W.K. Hensley, Pacific Northwest National Laboratory (Presented at IEEE, Nov. 2002)

Resolution and Sensitivity as a Function of Energy an Resolution and Sensitivity as a Function of Energy and Incident Geometry for Germanium Detectors
R.M. Keyser, ORTEC (International Radiochemical Analysis Conference, Maidstone, Kent, UK, Sept. 2002)

The Shape of the Full Energy Gamma Peak in Germanium Detectors for Different Energies and Incident Geometries
R.M. Keyser, ORTEC (INMM, July 2002)

Resolution and Sensitivity as a Function of Energy an Resolution and Sensitivity as a Function of Energy and Incident Geometry for Germanium Detectors
R.M. Keyser, ORTEC (Presented at IRRMA meeting, June 2002, Bologna, Italy)

Using the IEC Standard to Describe Low Background Detectors - What May One Expect?
Ronald M. Keyser and Sanford Wagner (1998)

On the Use of a High-Purity Ge-Detector for PIXE Spectrometry on Geological Materials
Dr. R.D. Vis (1996)

Advances in Large-Diameter, Low-Energy HPGe Detectors
T.R. Twomey, R.M. Keyser, EG&G ORTEC (1994 Nuclear Instruments and Methods in Physics Research A 339)

Benefits of Using Super Large Germanium Gamma Ray Detectors for the Quantitative Determination of Environmental Radionuclides
R.M. Keyser, T.R. Twomey, and S.E. Wagner, EG&G ORTEC (1990)

Radiation Damage Resistance of Reverse Electrode Ge Coaxial Detectors
R.H. Pehl and N.W. Madden, Lawrence Berkeley Lab; J.H. Elliott, Lawrence Livermore Lab; T.W. Raudorf, R.C. Trammell, and L.S. Darken, ORTEC (1979)

Characterization and Applicability of Low-Background Germanium Detectors
R.M. Keyser, EG&G ORTEC

Performance of a Gamma Ray and X-Ray Spectrometer Utilizing Germanium and Si(Li) Detectors Cooled by a Closed Cycle Cryogenic Mechanical Refrigerator
R.E. Stone, V.A. Barkely, and J.A. Fleming, ORTEC (1986)

Improvement of Spectral Resolution in the Presence of Periodic Noise and Microphonics for Hyper Pure Germanium Detector Gamma Ray Spectrometry Using a New Digital Filter
M. Schultz, R. Keyser, R. Trammell, and D. Upp, ORTEC (Presented at MTAA-11, June 2004)

Performance of Light-Weight, Battery-Operated, High Purity Germanium Detectors for Field Use
R. Keyser, T. Twomey, D. Upp, ORTEC (Presented at INMM, July 2003)

New Cooling Methods for HPGe Detectors and Associated Electronics
D.L. Upp, R.M. Keyser, T.R. Twomey, ORTEC (Presented at MARC, Apr. 2003) (Printed in Journal of Radioanalytical and Nuclear Chemistry, Vol. 264, No. 1 [2005] 121-126)

Performance of a New Type of Electrical Cooler for HPGe Detector Systems
E. Broerman, D. Upp, and T. Twomey, PerkinElmer Instruments-ORTEC and W. Little, MMR Technologies Inc. (INMM 2001)

A New Cooler for HPGe Detector Systems
E. Broerman, R. Keyser, T. Twomey, and D. Upp, PerkinElmer Instruments-ORTEC (Presented at the 23rd Brugge ESARDA meeting on Safeguards and Nuclear Materials Management, May 2001)

Electrically Cooled Germanium System for Measurements of Uranium Enrichment in UF6 Cylinders (IAEA-CN-184/45)
P. Dvornyak, M. Koestlbauer, A. Lebrun, M. Murray, V. Nizhnik, IAEA; C. Saidler, T. Twomey, ORTEC (Oct. 2010)

The Use of FRAM with a Portable, HPGe Based Nuclide Identifier to Measure the Isotopic Composition of Plutonium and Uranium
Thomas E. Sampson, Gilbert W. Butler, Duc T. Vo, Tracy Wenz, Michael A. Dempsey, Manuel A. Gonzales, Steven C. Myers, LANL (Presented at INMM July 2006)

A New, Portable High Resolution Gamma Ray Instrument for Use in On Site Safeguards Inspection
T.R. Twomey, R.M. Keyser, ORTEC; D.T. Vo, LANL (JRC Workshop Nov. 2005)

FRAMs Isotopic Uncertainty Analysis
Duc Vo, LANL (INMM 2005)

Application Guide to Gamma-Ray Isotopic Analysis Using the FRAM Software
Thomas E. Sampson, Thomas A. Kelley, and Duc T. Vo, LANL (LA-14018 Issued Sept. 2003)

Using the Nuclide Report Function to Perform Enrichment Estimates with the ORTEC digiDART
Harold Wheat, Jr. Y-12 National Security Complex, Oak Ridge, TN (INMM 2003)

Performance of a Portable, Digital-Signal-Processing MCA with Safeguards Germanium Detectors
R. Bingham, R. Keyser, and T. Twomey, PerkinElmer Instruments-ORTEC (INMM 2001)

Authentication and Data Quality Monitoring with Safeguards HPGe Detector Systems
T. Twomey, R. Bingham, and R. Keyser, PerkinElmer Instruments-ORTEC (INMM 2001)

Full Range MGA Plutonium Isotopic Analysis Using Single Ge Detector
W.M. Buckley, T.F. Wang, A. Friensehner, S.A. Kreek, R.G. Lanier, W.E. Parker, and W.D. Ruhter, Lawrence Livermore National Lab; T. Twomey, D. Martinez, R. Keyser, and P. Sangsingkeow, PerkinElmer Instruments - ORTEC Division (Submitted to INMM 2000)

New Shift Register Electronics for Improved Precision of Neutron Coincidence and Multiplicity Assays of Plutonium and Uranium Mass
J.E. Stewart, S.C. Bourret, M.S. Krick, M.R. Sweet and T.K. Li, Los Alamos National Lab; Anatoly Gorobets, Research Institute of Atomic Reactors (1999)

Test and Evaluation of the FRAM Isotopic Analysis Code for EURATOM Applications
T.E. Sampson, Los Alamos National Lab; G.P.D. Verrecchia, M.T. Swinhoe, and P. Schwalbach, Commission of the European Communities; J. Gustafsson, ABB Atom AB; A.M. Anderson, J. Myatt, and B. Metcalfe, United Kingdom Atomic Energy Authority (1999 INMM)

Optimization of Pulse Processing Parameters for HPGe Gamma-ray Spectroscopy Systems Used in Extreme Count Rate Conditions and Wide Count Rate Ranges
R.M. Keyser and T.R. Twomey, ORTEC (MARC Conference March 2012) (Journal of Radioanalytical and Nuclear Chemistry: Volume 296, Issue 1 (2013), Page 503-508)

Improved Performance in Germanium Detector Gamma Spectrometers based on Digital Signal Processing
R.M. Keyser, R.D. Bingham, and T.R. Twomey, ORTEC (April 2006)

Improved Performance in Germanium Detector Gamma Spectrometers based on Digital Signal Processing
R. Keyser, T. Twomey, and R. Bingham, ORTEC (ANS, Nov. 2004)

Using the Nuclide Report Function to Perform Enrichment Estimates with the ORTEC digiDART
Harold Wheat, Jr. Y-12 National Security Complex, Oak Ridge, TN (INMM 2003)

Loss Free Counting with Uncertainty Analysis Using Innovative Zero Dead Time Technique
The ORTEC loss free counting method with estimation of the uncertainty associated with the collected data is accurate for rapidly changing count rate applications. (June 2002)

Comparisons of the Portable Digital Spectrometer Systems
D.T. Vo, P.A. Russo, Los Alamos National Lab (LA-13895-MS, Issued Feb. 2002)

A Plausible Mathematical Interpretation of the Variance Spectra Obtained with the DSPEC Plus Digital Spectrometers
Pomme, Institute for Reference Materials and Measurement, Belgium (Reprinted from Nuclear Instruments and Methods in Physics Research A 482 (2002) 565-566 with permission from Elsevier Science)

Analysis of Long-lived Isotopes in the Presence of Short-lived Isotopes Using Zero Dead Time Correction
R. Keyser, T. Twomey, and D. Upp, PerkinElmer Instruments-ORTEC, and R. Sillanpaa, Teollisuuden Voima Oy (IEEE November 2001)

Performance of the Zero-Dead-Time Mode of the DSPEC Plus
R. Keyser, T. Twomey, and R. Bingham, PerkinElmer Instruments-ORTEC (ANS 2001)

A New Method for Counting Loss Correction with Uncertainty in Gamma Spectroscopy Applications
D. Gedcke, R. Keyser, and T. Twomey, PerkinElmer Instruments-ORTEC (INMM 2001)

An Innovative, Portable MCA based on Digital Signal Processing
R. Bingham, R. Keyser, and T. Twomey, PerkinElmer Instruments-ORTEC (Presented at the 23rd Brugge ESARDA meeting on Safeguards and Nuclear Materials Management, May 2001)

A Digital Method for Dead Time Compensation in Nuclear Spectroscopy
R. Keyser, D. Gedcke, D. Upp, T. Twomey, and R. Bingham, PerkinElmer Instruments-ORTEC (Presented at the 23rd Brugge ESARDA meeting on Safeguards and Nuclear Materials Management, May 2001)

An Innovative Method for Dead Time Correction in Nuclear Spectroscopy
D. Upp, R. Keyser, D. Gedcke, T. Twomey, and R. Bingham, PerkinElmer Instruments-ORTEC (2000)

Comparisons of the DSPEC and DSPEC Plus Spectrometer Systems
Duc T. Vo (Nov. 1999)

Comparisons Between Digital Gamma Ray Spectrometer (DSPEC) and Standard Nuclear Instrumentation Methods (NIM) Systems
D.T. Vo, P.A. Russo, and T.E. Sampson (March 1998)

Evaluating the Commercial Spectrometer Systems for Safeguards Applications Using Germanium Detectors
D.T. Vo, Los Alamos National Laboratory

Optimization of Pulse Processing Parameters for HPGe Gamma-ray Spectroscopy Systems Used in Extreme Count Rate Conditions and Wide Count Rate Ranges
R.M. Keyser and T.R. Twomey, ORTEC (MARC Conference March 2012)

Metodi Avanzati di Spettrometria Gamma
Davide Sacchi, AMETEK s.r.l. (ORTEC) and Luca Albertone ARPA Piemonte (2011)

Performance of an Enhanced Throughput Feature in a High-Count Rate System
Ronald M. Keyser and Rex C. Trammell, ORTEC (2004 IEEE)

High Count Rate Spectroscopy with Ge Detectors: Quantitative Evaluation of the Performance of High Rate Systems
Timothy R. Twomey, Ronald M. Keyser, Michael L. Simpson, Sanford E. Wagner (1991)

Charge Trapping Correction in Ge Spectrometers
M.L. Simpson, T.W. Raudorf, T.J. Paulus, R.C. Trammell, EG&G ORTEC (1989 IEEE)

High-Rate and High-Energy Gamma-Ray Spectroscopy Using Charge Trapping and Ballistic Deficit Correction Circuits
M.L. Simpson, T.W. Raudorf, T.J. Paulus, R.C. Trammell, EG&G ORTEC (1989)

Ballistic Deficit Correction in Semiconductor Detector Spectrometers
F.S. Goulding and D.A. Landis, Lawrence Berkeley Laboratory (IEEE Transactions on Nuclear Science, Vol. 35, No. 1, February 1988)

Effect of Charge Carrier Trapping on Germanium Coaxial Detector Line Shapes
T.W. Raudorf, ORTEC; R.H. Pehl, Lawrence Berkeley Laboratory (1986)

Performance Characteristics of a Third Generation Spectroscopic Vehicle Portal Monitor based on High Purity Germanium Detectors
T.R. Twomey, J. Long, and F. Sergent, ORTEC (IEEE 2013)

Field of View Measurements on a Collimated Transportable HPGe System Used in Search Systems
Timothy R. Twomey, ORTEC; Ronald M. Keyser, Software and Information Services (INMM July 2012)

Figure of Merit for Comparing Performance of Different Radiation Identification and Detection Systems Used in Illicit Trafficking Control
Ronald M. Keyser and Timothy R. Twomey, ORTEC; Neil A. Webster and Michael D. Belbot, Thermo Fisher (INMM July 2011)

Figure of Merit for Evaluating the Performance of Radionuclide Identification in Portal Monitors and Handheld Devices
Ronald M. Keyser and Timothy R. Twomey, ORTEC; Neil A. Webster and Michael D. Belbot, Thermo Fisher (ESARDA May 2011)

Operational Experience with a Secondary Spectroscopic Vehicle Portal Monitor Using High Purity Germanium Detectors
T. Twomey and R. Keyser, ORTEC; M. Rowley, NM Dept. of Public Safety; L .Shin, CA Emergency Management Agency (IAEA November 2010)

Performance of a Radiation Portal Freight Monitor based on Integrated Germanium Detector Modules
Ronald M. Keyser and Timothy R. Twomey, ORTEC, (INMM July 2010)

Standoff Performance of HPGe Detectors in Identification of Gamma-Ray Radiation Sources
Ronald M. Keyser, Timothy R. Twomey, and Sam Hitch, ORTEC, (INMM July 2009)

Standoff Performance of HPGe Detectors in Identification of Gamma-Ray Radiation Sources
Ronald M. Keyser, Timothy R. Twomey and Sam Hitch, ORTEC, (ESARDA May 2009)

Detector Resolution Required for Accurate Identification in Common Gamma-Ray Masking Situations
Ronald M. Keyser and Timothy R. Twomey, ORTEC, (MARC April 2009)

Performance of a Small Portal Using Integrated Germanium Detector Modules
Ronald M. Keyser and Timothy R. Twomey, ORTEC, (INMM July 2008)

Performance Characteristics of a Third Generation Portable Radionuclide Identifier
Ronald M. Keyser and Timothy R. Twomey, ORTEC, (INMM July 2008)

False Positive Probability as a Function of Background for Short Data Collection Times in a Germanium Detector Portal Monitor
Ronald M. Keyser and Timothy R. Twomey, ORTEC, (INMM July 2008)

Characteristics and Performance of an Integrated Portable High Efficiency Neutron Multiplicity Counter for Detection of Illicit Neutron Sources
Timothy R. Twomey and Ronald M. Keyser, ORTEC (INMM July 2007)

Background Reduction Using Collimators on a Portable HPGe Nuclide Identifier
Ronald M. Keyser, ORTEC (INMM July 2007)

Characteristics of an Integrated Gamma Ray Spectrometer Using Germanium Detectors in Fixed and Mobile Measurement Systems
Ronald M. Keyser, Timothy R. Twomey, and Sam Hitch, ORTEC (INMM July 2007)

Characteristics of an Integrated Germanium Detector Based Gamma-Ray Spectrometer for Monitoring Systems
Ronald M. Keyser, Timothy R. Twomey, and Samuel Hitch, ORTEC (ESARDA May 2007)

Non Destructive Identification of Chemical Warfare Agents and Explosives by Neutron Generator Driven PGNAA
T.R. Twomey, ORTEC; A.J. Caffrey and D.L. Chichester, INL (IAEA Feb. 2007)

Performance of an Improved HPGe based Radioisotope Identifier (RIID) in the Identification of SNM and SNM Mixtures
Ronald M. Keyser, Danield L. Upp, and Timothy R. Twomey, ORTEC (INMM July 2006)

Minimum Detectable Activity Estimates for a Germanium Detector Based Spectroscopic Portal Monitor
Ronald M. Keyser, Frank Sergent, Timothy R. Twomey, and Daniel L. Upp, ORTEC (INMM July 2006)

Predictive Research for the Department of Energys Radiological Triage Program
Jason M. Shergur, David J. Mercer, John M. Blackadar, and Paul D. Felsher, LANL (Presented at INMM July 2006)

Why High Purity Germanium (HPGe) Radiation Detection Technology is Superior to Other Detector Technologies for Isotope Identification
S. Hitch, R. Keyser, J. Smalling, and T. Twomey, ORTEC (May 2006) White Paper

Germanium Detection Search System to Locate Special Nuclear Material or Improvised Nuclear Weapons
S. Hitch, R. Keyser, J. Smalling, and T. Twomey, ORTEC (May 2006) White Paper

Enhanced Standoff Detection Capability for SNM Using High Purity Germanium Detector Based Instrumentation
S. Hitch, R. Keyser, J. Smalling, and T. Twomey, ORTEC (May 2006) White Paper

Comparison of MCNP and Experimental Measurements for an HPGe-based Spectroscopy Portal Monitor
R.M. Keyser, T.R. Twomey, and D.L. Upp, ORTEC, and W. Hensley, PNNL (April 2006)

The HMLs New Field Deployable High Resolution Whole Body Counter
Gary H. Kramer, Kevin Capello, and Barry M. Hauck, Human Monitoring Laboratory, Radiation Surveillance and Health Assessment Division, Canada Radiation Protection Bureau, (Operational Radiation Safety November 2005)

Performance of an HPGe based and NaI based Radionuclide Identifier (RIID) in the Identification of Radioactive Materials
R.M. Keyser, D.L. Upp, T.R. Twomey, ORTEC (Presented at INMM, July 2005)

A Comparison of an HPGe-based and NaI-based Radioisotope Identifier (RIID) for Radioactive Materials
R.M. Keyser, T.R. Twomey, D.L. Upp, ORTEC (Presented at ESARDA, May 2005)

An Improved Handheld Radioisotope Identifier (RID) for both Locating and Identifying Radioactive Materials
R.M. Keyser, T.R. Twomey, and D.L. Upp, ORTEC (Presented at HPS Midyear, Feb. 2005)

New Technology Gives Bomb Squads the Upper Hand in the Fight Against Radiological or Nuclear Terrorism
John Smalling (Presented at IABTI, Oct. 2004 and published in The Detonator - Vol. 31, No. 5)

Hand-held Radio Isotope Identifiers for Detection and Identification of Illicit Nuclear Materials Trafficking: Pushing the Performance Envelope
T.R. Twomey and R.M. Keyser, ORTEC (Presented at World Customs Organization Conference, Sept. 2004)

Performance of a portable HPGe-based Nuclide Identifier on Multiple Nuclide Mixtures
R.M. Keyser and T.R. Twomey, ORTEC (Presented at INMM, July 2004)

Performance of a car-mounted neutron and gamma-ray monitoring system for illicit material detection
D.L. Upp and R.M. Keyser, ORTEC (Presented at INMM, July 2004)

High Resolution Detection Systems for Interdiction of Nuclear Material Trafficking
R. MacKenzie, T. Twomey, D. Upp, S. Hitch, and R. Keyser, ORTEC, (Presented at the International Symposium on Radiation Safety Management, Nov. 5-7, 2003, Daejeon, Korea)

Applications of Gamma Spectrometric Techniques with Plastic Scintillators for the Suppression of "Innocent Alarms" in Border Monitoring for Nuclear and other Radioactive Materials
K.E. Duftschmid, Technical University Graz, Austria (World Customs Exhibition and Forum, Budapest, Sept. 2003)

Evaluation of Handheld Isotope Identifiers
J.M. Blackadar, J.A. Bounds, P.A. Hypes, D.J. Mercer, C.J. Sullivan, Los Alamos National Laboratory (July 2003)

Evaluation of Commercial Detectors
J.M. Blackadar, S.E. Garner, J.A. Bounds, W.H. Casson, D.J. Mercer, Los Alamos National Laboratory (Presented at INMM, July 2003)

Performance of Light-Weight, Battery-Operated, High Purity Germanium Detectors for Field Use
R. Keyser, T. Twomey, D. Upp, ORTEC (Presented at INMM, July 2003)

New Cooling Methods for HPGe Detectors and Associated Electronics
D.L. Upp, R.M. Keyser, T.R. Twomey, ORTEC (Presented at MARC, Apr. 2003)

Chemical Warfare Agent and High Explosive Identification by Spectroscopy of Neutron-Induced Gamma Rays
A.J. Caffrey, J.D. Cole, R.J. Gehrke, and R.C. Greenwood, Idaho National Engineering Laboratory (1991)

Networks and Connections in the Counting Room
R.M. Keyser, T.R. Twomey, EG&G ORTEC (1999 ESARDA Conference)

Performance of the True Coincidence Correction Method in GammaVision
R. Keyser, S. Haywood, and D. Upp, PerkinElmer Instruments-ORTEC (ANS 2001)

Deconvolution of Gamma-Ray Peak Doublets as a Function of Peak Separation and Relative Amplitude
R.M. Keyser, ORTEC

IDM-200-V Performance Data
NPL Report IR 30 - NPL Nuclear Industry Proficiency Test Exercise 2012 (September 2013)

Performance of a HPGe System for Surface and Container Measurements
Timothy R. Twomey, ORTEC; Ronald M. Keyser, Software and Information Services. (Waste Management Conference February 2013)

Proposed Figure of Merit for Evaluating the Performance of Radiation Waste Measurement Systems
Ronald M. Keyser and Timothy R. Twomey, ORTEC; Neil A. Webster and Michael D. Belbot, Thermo Fisher. (ICEM September 2011)

Radiological Performance of an Automated HPGe Assay System for Bulk Containers of Decommissioning Waste Intended for Free Release
Timothy R. Twomey, Ronald M. Keyser, and Davide Sacchi, ORTEC; Giuseppe Merlino and Paolo Grignani, EL-SE S.r.l.; Gianluigi Migliore, Nunzia Radatti and Sabrina Romani, Sogin S.p.A. (INMM July 2010)

Improved Algorithm for Close Geometry Characterization of Waste Using Gamma-Ray Spectroscopy
Xiaoqin J. Guo, Richard C. Hagenauer, and Ronald M. Keyser, ORTEC (IECM October 2009)

Establishing an ISOCART Measurement Station to Meet Government Burial Regulations for Radioactive Material
Rich Hagenauer (April 2009)

Benchmarking ORTEC ISOTOPIC Measurements and Calculations
R.A. Dewberry, V.R. Casella, and R.A. Sigg, Savannah River National Laboratory and N.N. Bhatt, Savannah River Site Analytical Laboratories (September 2008)

New Algorithms for the Analysis of Waste Characterization
Xiaoqin J. Guo and Richard C. Hagenauer, ORTEC (INMM July 2007)

Measurement PDP Drums Using Program Isotopic
R. Hagenauer, ORTEC and D. Mercer, LANL (February 2007)

Performance of a Portable Electromechanically Cooled HPGe Detector for Site Characterization
R.M. Keyser and R.C. Hagenauer, ORTEC (April 2006)

Using the ORTEC ISO-CART and ISOTOPIC Software for In Situ Gamma Spectroscopy Measurements of Bulk Samples
Rich Hagenauer, ORTEC - Feb. 2006

Comparison of Gamma Ray Nondestructive Assay Measurement Techniques
March 2005

MDA Values for Isotopic (ISOPLUS) Systems
Rich Hagenauer, ORTEC - Sept. 2004

Performance of Transmission Corrected High Resolution Gamma Assays in a Nuclear Fuel Fabrication Facility
Richard T. Kimura, AREVA (Presented at WM'04 Conference March 2004)

Holdup Measurement System 4 (HMS4) - Automation and Improved Accuracy
S.E. Smith (ORNL), K.A. Thompson (Y-12), J. Malcom and P.A. Russo (LANL) (2004)

The Evaluation of Program Isotopic to Nondestructively Quantify Uranium and Plutonium Samples at the Joint Research Center in Ispra, Italy
R. Hagenauer, ORTEC; P. Funk, Inst. of Nuclear Protection and Safety, Fontenay-Aux-Roses, France; P. Schillebeeckx and M. Thornton, Joint Research Center (ESARDA, May 2003)

Performance of a Multi-Spectrum Assay System for Large Containers
R. Keyser, T. Twomey, R. Hagenauer, ORTEC (Presented at ESARDA, May 2003)

A Portable HPGe System for Measuring Contaminated Soils and Floors
Richard Hagenauer, PerkinElmer Instruments-ORTEC (Spectrum 2000)

Practical Solutions to Radioactive Waste Characterization
R.M. Keyser, T.R. Twomey, EG&G ORTEC and R. Hagenauer, Lockheed Martin Energy Systems (1999 ESARDA Conference)

Intercomparison of In Situ Gamma Ray Spectrometers
K.M. Miller, P. Shebell, M.A. Monetti, and G.A. Klemic, Environmental Measurements Laboratory, U.S. D.O.E.; R. Venkataraman and E. Fisher, Canberra Industries; D.G. Scoggins, EG&G ORTEC; S.H. Faller and B. Moore, Office of Radiation and Indoor Air, U.S. E.P.A.; R.T. Reiman, D.G. Keefer, and B. Gilmartin, Yankee Atomic Electric Co. (Radioactivity and Radiochemistry, Vol. 9, No. 4, 1998)

Calibration Factors for Ge Detectors Used for Field Spectrometry
I.K. Helfer and K.M. Miller, EML (1988)

Reliability of two calculation codes for efficiency calibrations of HPGe Detectors
K. Abbas, F. Simonelli, F. D'Alberti, M. Forte, M.F. Stroosnijder, European Commission, JRC (Applied Radiation and Isotopes 56 2002)

Analysis of Am, Pu and Th in Large Volume Water Samples in the Presence of High Concentrations of Iron
M. Schultz, ORTEC; W. Burnett, Florida State University; T. Hinton, J. Alberts, and M. Takacs, University of Georgia (International Radiochemical Analysis Conference, Maidstone, Kent, UK, Sept. 2002)

Compton Suppression Systems for Environmental Measurements
T.J. Paulus, R.M. Keyser, EG&G ORTEC

Performance Results for the Stability of the ORTEC DSPEC Digital Electronics in the Sentinel On-Line Unattended Measurement Application
Daniel L. Upp, ORTEC. and Risto Sillanpaa, Teollisuuden Voima Oy (1998)

Fuel Integrity Evaluation and Surveillance System (FINESS)
Lembit Sihver, ABB Atom AB; Daniel L. Upp, PerkinElmer Instruments; Bjorn Bjurman, Forsmarks Kraftgrupp AB

Performance Characteristics of Eighteen Positron Lifetime Spectrometers
T.J. Paulus, EG&G ORTEC (1991 - 9th International Conference on Positron Annihilation)

Timing Electronics and Fast Timing Methods with Scintillation Detectors
T.J. Paulus, ORTEC (1985)

Positron Annihilation Lifetime Spectroscopy Characterization of Polymers Free Volume Effects Probed by PALS

Optimization of a State of the Art Positron Lifetime Measurement Apparatus
T.J. Paulus, EG&G ORTEC (1985 - China Nuclear Society Seminar)

Measurement of Long Lived Radioactive Impurities Retained in the Disposable Cassettes on the Tracerlab MX System During the Production of [¹⁸F]FDG
D. Ferguson, P. Orr, J. Gillanders, G. Corrigan, C. Marshall, Regional Medical Services, Belfast Health and Social Care Trust (2011 Applied Radiation and Isotopes)

Neutron Gamma Discrimination with Stilbene and Liquid Scintillators
EG&G ORTEC (1989)

Optimizing Noise and Energy Resolution of SSB Detectors