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- W2022171143 abstract "The lithium sputtering yield from lithium and tin-lithium surfaces in the liquid state under bombardment by low-energy, singly charged particles as a function of target temperature is measured by using the Ion-surface Interaction Experiment facility. Total erosion exceeds that expected from conventional collisional sputtering after accounting for lithium evaporation for temperatures between 200 and $400phantom{rule{0.2em}{0ex}}ifmmode^circelsetextdegreefi{}mathrm{C}$. Lithium surfaces treated with high-fluence D atoms are bombarded by ${mathrm{H}}^{+}$, ${mathrm{D}}^{+}$, ${mathrm{He}}^{+}$, and ${mathrm{Li}}^{+}$ at energies between 200 and $1000phantom{rule{0.3em}{0ex}}mathrm{eV}$ and 45ifmmode^circelsetextdegreefi{} incidence. Erosion measurements account for temperature-dependent evaporation. For example, $700phantom{rule{0.3em}{0ex}}mathrm{eV}$ ${mathrm{He}}^{+}$ particles bombarding the D-treated liquid Li surface at room temperature result in a sputter yield of 0.12 Li/ion and at temperatures $ensuremath{sim}2.0{T}_{m}$ (where ${T}_{m}$ is the melting temperature of the sample), a yield near and above unity. The enhancement of lithium sputtering is observed to be a strong function of temperature and moderately on particle energy. Bombardment of a low-vapor-pressure lithium alloy (0.8 Sn-Li), used for comparison, also results in nonlinear rise of lithium erosion as a function of temperature. Measurements on both pure liquid Li and the alloy indicate a weak dependence with surface temperature of the secondary ion-induced secondary ion emission. Treatment of liquid Li surfaces with D, yields reduced sputtering under ${mathrm{He}}^{+}$ impact by a factor of 5--6 when measured at room temperature due to preferential sputtering effects." @default.
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- W2022171143 date "2007-11-26" @default.
- W2022171143 modified "2023-10-17" @default.
- W2022171143 title "Collisional and thermal effects on liquid lithium sputtering" @default.
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- W2022171143 doi "https://doi.org/10.1103/physrevb.76.205434" @default.
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