What's New?
•	December Newsletter
•	December Journal

Upcoming Events
•	HPS Midyear Meeting Recent Advances in Planning and Response to Radiation Emergencies 31 January - 3 February 2009 San Antonio, Texas
•	54th Annual Meeting of the Health Physics Society 12-16 July 2009 Minneapolis, Minnesota
•	2009 Professional Development School NORM and TENORM 16-18 July 2009 Minneapolis, Minnesota

20 November 2008

Answer to Question #204 Submitted to "Ask the Experts"

Category: Instrumentation and Measurements — Surveys and Measurements (SM)

The following question was answered by an expert in the appropriate field:

Please forward information on very high-range dose-rate and dose detectors (>100 Krad). Thanks.

TLD (LiF and LiBO) will normally reach supralinearity around 1,000 rad. This is due to the PM Tube and its characteristics. In order to measure response above 1,000 rad, various filters need to be used that protect the PM tube, as well as obtaining a good TL output glow curve. ICN uses a 1,000X filter to measure dose up to 10^6 rad (actual dose may be higher based on appropriate calibrations). Facilities that require these measurements include sterilization facilities (industrial and medical research) and power reactors where TLDs are placed in the core to measure potential embrittlement. You can visit our ICN Worldwide Dosimetry Web site for more information. Or you may contact me (Sander Perle) at ICN Dosimetry. Editor's Note: Other companies might have similar information. To contact some you can go to the HPS Web site's Affiliates page. Gen Roessler, Editor Health Physics Society Web Site

The information and material posted on this Web site is intended as general reference information only. Specific facts and circumstances may alter the concepts and applications of materials and information described herein. The information provided is not a substitute for professional advice and should not be relied upon in the absence of such professional advice specific to whatever facts and circumstances are presented in any given situation. Answers are correct at the time they are posted on the Web site. Be advised that over time, some requirements could change, new data could be made available, or Internet links could change. For answers that have been posted for several months or longer, please check the current status of the posted information prior to using the responses for specific applications.