Effects of distinct ion temperatures on the head-on collision and phase   shifts of dust acoustic one and multi-solitons in dusty plasmas
  The propagation characteristics and interactions between the dust acoustic (DA) one and multi solitons in an unmagnetized dusty plasmas composing negatively charged mobile dust, Boltzmann distributed electrons, nonextensive distributed cold and nonthermal distributed hot ions are studied. The well known extended Poincar Lighthill Kuo (PLK) method is employed to derive the two sided Korteweg de Vries (KdV) equations. The solutions of KdV equations are constructed using the Hirota method both for one and multi solitons. The phase shifts are determined for the interaction of one, two and three DA solitons. The effects of plasma parameters on the head on collision of DA one as well as multi solitons and their corresponding phase shifts are investigated. 
M. S. Alam, M. G. Hafez, M. R. Talukder and M. Hossain Ali
physics.plasm-ph