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Across 5. amplifies voltage 6. used to detect biological samples 12. surpasse the G-M region and is infinity 14. electronic device that accepts singlr pulses from a radiation detector and counts them 16. thermoluminescent dosimetry 17. if it's not alive; counter cannot respond to another ionizing event 18. increase voltage leads to this region 19. involves more than one circuit; enables simultaneous or sequential counting of radioactivity 20. no pulse height, a plateau is reached; saturation 21. example of a portable dose rate meter 22. above saturation voltage; seen ion pairs--invloves gas amplification

Down 1. used in the method of counting thyroid uptake 2. portable; enclosed volume of gas for detection 3. worn by radiologic personnel for personal radiaiton monitoring 4. device that detects photons; NaI(TI), Ge(Li), Si(Li) are examples 5. converts light energy into electrical energy 7. "attraction" of the electrode that cause secondary emission each time a dynode is struck 8. accepts certain pulses and rejects others 9. most widely used detector 10. used to measure radiation in the ionization region 11. pulse height shows no difference as to primary events 13. involves ion pairs collected on the walls of an ion chamber 15. allows increase or decrease amplification