کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1867091 | 1038167 | 2012 | 4 صفحه PDF | دانلود رایگان |
We present a theory for a critical point and phase transitions in quantum plasmas (QPs). We use a newly obtained Lennard-Jones-type interaction potential or an oscillating exponential-screened Coulomb potential around ions that are screened by degenerate electrons in an unmagnetized QP. Expressions for the free energy and an equation of state for non-degenerate ions are obtained. It is found that the existence of a critical point and phase separations in our QPs depends on the Wigner–Seitz electron radius and the equilibrium ion temperature. Our results are relevant for understanding superdense astrophysical objects such as the cores of white dwarfs.
► Theory for plasma transition in quantum plasmas is presented.
► Phase separations are shown to depend on the plasma density and ion temperature.
► Application to white dwarfs in mentioned.
Journal: Physics Letters A - Volume 376, Issue 16, 19 March 2012, Pages 1352–1355