Sayler, A. M.McKenna, J.Gaire, B.Kling, Nora G.Carnes, K. D.Esry, B. D.Ben-Itzhak, Itzik2014-04-172014-04-172014-01-24http://hdl.handle.net/2097/17323The triatomic hydrogen molecular ion is instrumental as a benchmark toward understanding the strong-field dynamics of polyatomic molecules. Using a crossed-beams coincidence three-dimensional momentum imaging method, we demonstrate clear isotopic effects in the fragmentation of D[subscript 2]H[superscript +] induced by 7 fs (40 fs), 790 nm laser pulses at an intensity of 10[superscript 16] W/cm² (5×10[superscript 15] W/cm²). Our experiment uniquely separates all fragmentation channels and provides kinematically complete information for the nuclear fragments. For example, we show that for dissociative ionization of D[subscript 2]H[superscript +] there is a large difference in branching ratios of the two-body channels, namely, H[superscript +]+D[superscript +][subscript 2] dominates D[superscript +]+HD[superscript +], whereas there is minimal difference in branching ratios between the dissociation channels H[superscript +]+D[subscript 2] and D[superscript +]+HD.en-USThis Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).Strong-field dynamicsPolyatomic moleculesIsotopic effectsArticle (author version)