Equation of State for Technetium Metal up to 153 GPa
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas, Las Vegas, 89154-4003, (United States)
- Department of Physics and Astronomy, University of Nevada Las Vegas, Las Vegas, 89154-4002, (United States)
The transition metal, technetium, is a major fission product with a fission yield greater the 6 % for {sup 235}U and as such is found in large quantities in nuclear waste. However, few studies have investigated the behavior of technetium under extreme conditions. Previously, three studies have reported bulk moduli values for technetium metal determined by experimental methods: ultrasonic techniques at ambient pressure, estimated from elastic constants determined from experimental phonon dispersion curves and by high pressure X-ray diffraction. Numerous estimates have been made from computational methods - . The bulk moduli of transition metals is used as a benchmark for validating computation methods. With so little experimental data on technetium, it cannot serve as a useful benchmark. In our previous study the equation of state was measured up to 67 GPa using a 4:1 mixture of methanol-ethanol as the pressure transmitting medium. The non-hydrostatic data produced there resulted in an equation of state defined by B{sub 0} = 288 GPa, and B' = 5.9. Reported here is the high pressure X-ray diffraction measurements made on technetium metal up to a maximum pressure of 153 GPa (1.53 Mbar) and the resulting equation of state. (authors)
- OSTI ID:
- 23042565
- Journal Information:
- Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 115; ISSN 0003-018X
- Country of Publication:
- United States
- Language:
- English
Similar Records
The high pressure structure and equation of state of 2,6-diamino-3,5-dinitropyrazine-1-oxide (LLM-105) up to 20 GPa: X-ray diffraction measurements and first principles molecular dynamics simulations