| Autor: |
Jong-Man Lee, H.J. Lee, W.S. Yoon, Lee Min-Kie, Yun Ho Kim, Y.S. Jang, G. B. Kim, K.J. Kim, K.B. Lee, M.S. Kim, H.C. Ri, Y.N. Yuryev, Sang Jun Lee |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine. 70(9) |
| ISSN: |
1872-9800 |
| Popis: |
We have developed a high-resolution detection technique for measuring the energy and activity of alpha decay events using low-temperature detectors. A small amount of source material containing alpha-emitting radionuclides was enclosed in a 4π metal absorber. The energy of the alpha particles as well as that of the recoiled nuclides, low-energy electrons, and low-energy x-rays and γ-rays was converted into thermal energy of the gold absorber. A metallic magnetic calorimeter serving as a fast and sensitive thermometer was thermally attached to the metal absorber. In the present report, experimental demonstrations of Q spectroscopy were made with a new meander-type magnetic calorimeter. The thermal connection between the temperature sensor and the absorber was established with annealed gold wires. Each alpha decay event in the absorber resulted in a temperature increase of the absorber and the temperature sensor. Using the spectrum measured for a drop of 226 Ra solution in a 4π gold absorber, all of the alpha emitters in the sample were identified with a demonstration of good detector linearity. The resolution of the 226 Ra spectrum showed a 3.3 keV FWHM at its Q value together with an expected gamma escape peak at the energy shifted by its γ-ray energy. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect