Alpha-particle emission probabilities in the decay of Pu-240

作者：Sibbens G^*; Pomme S; Altzitzoglou T; Garcia Torano E; Janssen H; Dersch R; Ott O; Martin Sanchez A; Rubio Montero M P; Loidl M; Coron N; de Marcillac P; Semkow T M

来源：Applied Radiation and Isotopes, 2010, 68(7-8): 1459-1466.

DOI：10.1016/j.apradiso.2009.12.006

• Alpha-particle spectrometry
• Alpha-particle emission probabilities
• Pu-240
• Nuclear
• Metrology

Sources of enriched Pu-240 were prepared by vacuum evaporation on quartz substrates. High-resolution alpha-particle spectrometry of Pu-240 was performed with high statistical accuracy using silicon detectors and with low statistical accuracy using a bolometer The alpha-particle emission probabilities of six transitions were derived from the spectra and compared with literature values. Additionally, some alpha-particle emission probabilities were derived from gamma-ray intensity measurements with a high-purity germanium detector The alpha-particle emission probabilities of the three main transitions at 5168.1, 5123 6 and 5021.2 key were derived from seven aggregate spectra analysed with five different fit functions and the results were compatible with evaluated data. Two additional weak peaks at 4863 5 and 4492.0 key were fitted separately, using the exponential of a polynomial function to represent the underlying tailing of the larger peaks. The peak at 4655 key could not be detected by alpha-particle spectrometry, while gamma-ray spectrometry confirms that its intensity is much lower than expected from literature.

• 出版日期2010-8
• 单位中国地震局