Disentangling sequential and concerted three-body fragmentation has been a longstanding endeavor in studies of molecular dynamics. To accomplish this goal, we recently introduced a novel method to separate sequential from concerted breakup, where the sequential events are analyzed in their native frames [J. Rajput et al., Phys. Rev. Lett. 120, 103001 (2018)]. The essence of this method is the use of the Jacobi coordinates' conjugate momenta to reduce the dimensionality of the multibody fragmentation in combination with a clear signature for sequential breakup. To demonstrate this method, we employ coincidence momentum imaging to study the strong-field dissociative ionization of OCS into O++C + + S+, which typically undergoes concerted fragmentation or sequential breakup involving either a metastable CO2+ or CS2+ molecule. We identify sequential breakup using a uniform distribution as a function of the angle between the conjugate momenta, associated with the first and second fragmentation steps, which is due to the rotation of the intermediate molecule in the fragmentation plane. Furthermore, by exploiting this uniform distribution, we separate the sequential and concerted distributions in any plot created from the measured momenta.
Severt, T., et al. "Native frames: An approach for separating sequential and concerted three-body fragmentation." Physical Review A, vol. 110, no. 5, Nov. 2024. https://doi.org/10.1103/PhysRevA.110.053104
Severt, T., Rajput, Jyoti, Berry, Ben, Jochim, Bethany, Feizollah, Peyman, Kaderiya, Balram, Zohrabi, M., Ziaee, Farzaneh, P., Kanaka Raju, Rolles, D., Rudenko, A., Carnes, K. D., Esry, B. D., & Ben-Itzhak, I. (2024). Native frames: An approach for separating sequential and concerted three-body fragmentation. Physical Review A, 110(5). https://doi.org/10.1103/PhysRevA.110.053104
@article{osti_2903856,
author = {Severt, T. and Rajput, Jyoti and Berry, Ben and Jochim, Bethany and Feizollah, Peyman and Kaderiya, Balram and Zohrabi, M. and Ziaee, Farzaneh and P., Kanaka Raju and Rolles, D. and others},
title = {Native frames: An approach for separating sequential and concerted three-body fragmentation},
annote = {Disentangling sequential and concerted three-body fragmentation has been a longstanding endeavor in studies of molecular dynamics. To accomplish this goal, we recently introduced a novel method to separate sequential from concerted breakup, where the sequential events are analyzed in their native frames [J. Rajput et al., Phys. Rev. Lett. 120, 103001 (2018)]. The essence of this method is the use of the Jacobi coordinates' conjugate momenta to reduce the dimensionality of the multibody fragmentation in combination with a clear signature for sequential breakup. To demonstrate this method, we employ coincidence momentum imaging to study the strong-field dissociative ionization of OCS into O++C + + S+, which typically undergoes concerted fragmentation or sequential breakup involving either a metastable CO2+ or CS2+ molecule. We identify sequential breakup using a uniform distribution as a function of the angle between the conjugate momenta, associated with the first and second fragmentation steps, which is due to the rotation of the intermediate molecule in the fragmentation plane. Furthermore, by exploiting this uniform distribution, we separate the sequential and concerted distributions in any plot created from the measured momenta.},
doi = {10.1103/PhysRevA.110.053104},
url = {https://www.osti.gov/biblio/2903856},
journal = {Physical Review A},
issn = {ISSN 2469-9926},
number = {5},
volume = {110},
place = {United States},
publisher = {American Physical Society (APS)},
year = {2024},
month = {11}}