Evidence for the Spectroscopic Signature of Aging in (delta)-Pu(Ga)

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Plutonium, because of its radioactive nature, ages from the 'inside out' by means of self-irradiation damage and thus produces nanoscale internal defects. The self-irradiation induced defects come in the form of Frenkel-type defects (vacancies and self-interstitial atoms), helium in-growth, and defect clusters. At present there are neither experimental nor theoretical models describing the changes in the electronic structure caused by the aging in Pu. This fact appears to be associated primarily with the absence of reasonably convincing spectroscopic evidence of the changes. This paper demonstrates that Resonant Photoemission, a variant of Photoelectron Spectroscopy, has strong sensitivity to aging of Pu ... continued below

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5 p. (0.2 MB)

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Chung, B W; Schwartz, A J; Ebbinghaus, B B; Fluss, M J; Haslam, J J; Blobaum, K M et al. November 23, 2005.

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Plutonium, because of its radioactive nature, ages from the 'inside out' by means of self-irradiation damage and thus produces nanoscale internal defects. The self-irradiation induced defects come in the form of Frenkel-type defects (vacancies and self-interstitial atoms), helium in-growth, and defect clusters. At present there are neither experimental nor theoretical models describing the changes in the electronic structure caused by the aging in Pu. This fact appears to be associated primarily with the absence of reasonably convincing spectroscopic evidence of the changes. This paper demonstrates that Resonant Photoemission, a variant of Photoelectron Spectroscopy, has strong sensitivity to aging of Pu samples. The spectroscopic results are correlated with an extra-atomic screening model [1], and are shown to be the fingerprint of mesoscopic or nanoscale internal damage in the Pu physical structure. This means that a spectroscopic signature of internal damage due to aging in Pu has been established.

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5 p. (0.2 MB)

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PDF-file: 5 pages; size: 0.2 Mbytes

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  • Presented at: Materials Research Society, Boston, MA, United States, Nov 28 - Dec 02, 2005

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  • Report No.: UCRL-PROC-217512
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 894797
  • Archival Resource Key: ark:/67531/metadc886897

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  • November 23, 2005

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  • Sept. 22, 2016, 2:13 a.m.

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  • April 13, 2017, 6:12 p.m.

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Chung, B W; Schwartz, A J; Ebbinghaus, B B; Fluss, M J; Haslam, J J; Blobaum, K M et al. Evidence for the Spectroscopic Signature of Aging in (delta)-Pu(Ga), article, November 23, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc886897/: accessed June 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.