In this study a unique pulse amplifier, with automatic controlled gain, was used to measure nuclear lifetimes. The significance of this circuit is that it reduces the spread in pulse amplitudes of those pulses selected by Ge(Li) and NaI(Tl) detectors from a single channel analyzer. In the first part of this study a coincidence circuit composed of an Ortec module with Ge(Li) and NaI(Tl) detectors was utilized. The coincidence curves of two different sources, 22Na (0.511 MeV from positron annihilation) and 133Ba (0.081-MeV excited state), were recorded by a multichannel analyzer. In the second part of this research the unique pulse amplifier was added to the original coincidence circuit. The coincidence curve of the two sources was again recorded, and comparison of the two methods was made. A twenty five percent improvement in time resolution for 22Na and a twenty percent improvement for 133Na was achieved.Ball State UniversityMuncie, IN 47306
| Identifer | oai:union.ndltd.org:BSU/oai:cardinalscholar.bsu.edu:handle/181395 |
| Date | 03 June 2011 |
| Creators | Parvizi, Behram |
| Contributors | Craig, Edwim C. |
| Source Sets | Ball State University |
| Detected Language | English |
| Format | 64 leaves : ill. ; 28 cm. |
| Source | Virtual Press |
Page generated in 0.0023 seconds