Nosenko V, Goree J, Piel A
Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242, USA.
Phys Rev Lett. 2006 Sep 15;97(11):115001. doi: 10.1103/PhysRevLett.97.115001. Epub 2006 Sep 12.
The cutoff wave number for shear waves in a liquid-state strongly coupled plasma was measured experimentally. The phonon spectra of random particle motion were measured at various temperatures in a monolayer dusty plasma, where microspheres interact with a Yukawa potential. In the liquid state of this particle suspension, shear waves were detected only for wavelengths smaller than 20 to 40 Wigner-Seitz radii, depending on the Coulomb coupling parameter. The temperature of the suspension was controlled using a laser-heating method.
对液态强耦合等离子体中剪切波的截止波数进行了实验测量。在单层尘埃等离子体中，测量了不同温度下随机粒子运动的声子谱，其中微球与 Yukawa 势相互作用。在这种粒子悬浮液的液态下，根据库仑耦合参数，仅在波长小于 20 至 40 个维格纳 - 赛茨半径时检测到剪切波。悬浮液的温度使用激光加热方法进行控制。
