McKenna, J.Sayler, A. M.Anis, F.Gaire, B.Johnson, Nora G.Parke, E.Hua, J. J.Mashiko, H.Nakamura, C. M.Moon, E.Chang, Z.Carnes, K. D.Esry, B. D.Ben-Itzhak, I.2023-12-072023-12-072008-04-01https://hdl.handle.net/2097/43756High-order (three-photon or more) above-threshold dissociation (ATD) of H+2 has generally not been observed using 800 nm light. We demonstrate a strong enhancement of its probability using intense 7 fs laser pulses interacting with beams of H+2, HD+, and D+2 ions. The mechanism invokes a dynamic control of the dissociation pathway. These measurements are supported by theory that additionally reveals, for the first time, an unexpectedly large contribution to ATD from highly excited electronic states.© American Physical Society (APS). This 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).http://rightsstatements.org/vocab/InC/1.0/https://web.archive.org/web/20181120135245/https://journals.aps.org/copyrightFAQ.htmlText