Comment on "Highly nonlinear, sign-varying shift of hydrogen spectral lines in dense plasmas".
Possible inconsistencies between the recent hydrogen H(alpha) spectral line shift measurements and modifications of the theory of these shifts by Escarguel et al. [Phys. Rev. E 62, 2667 (2000)], and earlier measurements in dense plasmas and corresponding calculations are discussed. Some of the claimed differences may likely be due to underestimates of Debye shielding effects and to differences between definitions of line shifts in the case of asymmetric profiles.
Griem
H R
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