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1. Methods for characterizing a radiation detector for specifying radiation fields during testing against standards for homeland security applications
Series: Technical Note (NIST TN)
Report Number: 1916
Published: 4/15/2016
Authors: Anne L. Sallaska, Leticia S Pibida, Ronaldo Minniti, C Michelle O\'Brien
Abstract: A wide variability exists among commercial radiation detection instruments used to measure exposure rate or ambient dose equivalent rate. These instruments are used to measure both the radiation background and radioactive sources strengths to det ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=920590

2. Preparedness for Nuclear and Radiological Threats The Value of Standards for Detection of Radioactive Materials
Published: 9/1/2015
Authors: Leticia S Pibida, Anne L. Sallaska
Abstract: Document and physical standards play a vital role in security applications. Standards allow setting common measurement units, physical quantities and performance requirements for different types of radiation detection equipment and devices. Document ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917484

3. Revision of the NIST Standard for 223Ra: New Measurements and Review of 2008 Data
Series: Journal of Research (NIST JRES)
Published: 7/1/2015
Authors: Denis E Bergeron, Jeffrey T Cessna, Leticia S Pibida
Abstract: After discovering a discrepancy in the transfer standard currently being disseminated by the National Institute of Standards and Technology (NIST), we have performed a new primary standardization of the alpha-emitter 223Ra using Live-timed Antico ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917481

4. Determination of photon emission probabilities for the main gamma-rays of 223Ra in equilibrium with its progeny
Published: 3/11/2015
Authors: Leticia S Pibida, Brian Edward Zimmerman, Ryan P Fitzgerald, Lynne Emily King, Jeffrey T Cessna, Denis E Bergeron
Abstract: The currently published 223Ra gamma-ray emission probabilities display a wide variation in the values depending on the source of the data. The National Institute of Standards and Technology performed activity measurements on a 223Ra solution that was ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916239

5. Scaling of Testing Speed for Different Source-to-Detector Distances
Series: Technical Note (NIST TN)
Report Number: 1864
Published: 2/13/2015
Authors: Bruce R Norman, Anne L. Sallaska, Leticia S Pibida
Abstract: Several American National Standard Institute/Institute of Electrical and Electronics Engineers (ANSI/IEEE) and International Electrotechnical Commission (IEC) standards were developed for radiation detection systems used for homeland security app ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917778

6. A New NIST Primary Standardization of 18F
Published: 2/1/2014
Authors: Ryan P Fitzgerald, Brian Edward Zimmerman, Denis E Bergeron, Jeffrey T Cessna, Leticia S Pibida, Denise S Moreira
Abstract: A new primary standardization of 18F by NIST is reported. The standard is based on live-timed beta- gamma anticoincidence counting with confirmatory measurements by three other methods: (i) liquid scintillation (LS) counting using CIEMAT/NIST 3H e ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914677

7. ITRAP+10 Spectroscopic Radiation Portal Monitor Testing
Published: 11/14/2013
Authors: Anne L. Sallaska, Leticia S Pibida, Huaiyu H Chen-Mayer, Luc Murphy, Christina Ward
Abstract: The Illicit Trafficking Radiation Assessment Program (ITRAP+10) is an international effort of the Department of Homeland Security‰s Domestic Nuclear Detection Office (DHS/DNDO), the European Commission‰s Joint Research Center (EC-JRC), and the In ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914269

8. Report of Special Nuclear Material Validation Measurements for Backpack Type Radiation Detectors
Series: Technical Note (NIST TN)
Report Number: 1808
Published: 8/19/2013
Authors: Leticia S Pibida, Christina Ward
Abstract: This report provides results and recommendations from the validation testing for the different source configurations and radiation fields produced by special nuclear materials (SNMs) and depleted uranium (DU) listed within the Technical Capabilit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914345

9. Calibration of traceable solid mock I-131 phantoms used in an international SPECT image quantification comparison
Series: Journal of Research (NIST JRES)
Report Number: 118.017
Published: 8/15/2013
Authors: Brian Edward Zimmerman, Leticia S Pibida, Lynne Emily King, Denis E Bergeron, Jeffrey T Cessna, Matthew Merril Mille
Abstract: The International Atomic Energy Agency (IAEA) has organized an international comparison to assess Single Photon Emission Computed Tomography (SPECT) image quantification capabilities in 12 countries. Iodine-131 was chosen as the radionuclide for ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913572

10. Test Report-Exposure and Ambient dose Equivalent Rate Measurements in Support of the ITRAP+10 Testing
Series: Technical Note (NIST TN)
Report Number: 1800
Published: 8/1/2013
Authors: Leticia S Pibida, Ronaldo Minniti, Larry Lee Lucas, C Michelle O\'Brien
Abstract: In this work we studied the response of two different Victoreen® instruments as a function of the exposure rate, the instrument orientation and photon energy. The rate dependence for both instruments is of the order of 8 % over the range of expos ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913883



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