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- W92564265 abstract "Nuclear gamma ray resonance (Moessbauer effect) was used to examine the isomer shift of NpPO/sub 4/. The experiments consisted of two runs. The difference between the two was in the preparation of the source material, AmPO/sub 4/. For the first phase, AmPO/sub 4/ was precipitated at room temperature. In the second phase, AmPO/sub 4/ crystals were grown at 1200/sup 0/C over a period of three weeks, resulting in several large crystals. The absorber for these experiments was NpO/sub 2/. The room temperature precipitated AmPO/sub 4/ source yielded a single absorption line with an isomer shift of approximately -40 mm/sec which represents an energy shift of 8 x 10/sup -6/ eV. This places the neptunium in the +3 state. The high temperature precipitated AmPO/sub 4/ crystals showed two isomer shifts, one at -40 mm/s and the other at 18 + /-4mm/s. This new value agrees with those in the literature for neptunium compounds in a +5 state. This finding is significant for waste storage as the +5 state is quite water stable while the +3 is not." @default.
- W92564265 created "2016-06-24" @default.
- W92564265 creator A5016152415 @default.
- W92564265 date "1979-08-20" @default.
- W92564265 modified "2023-09-25" @default.
- W92564265 title "Detection of the isomer shift of neptunium phosphate using nuclear gamma ray resonance" @default.
- W92564265 doi "https://doi.org/10.2172/7067436" @default.
- W92564265 hasPublicationYear "1979" @default.
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