Metastable Triply Charged Diatomic Molecules Produced with Femtosecond Pulses

Abstract

Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Metastable triply charged diatomic molecules produced with femtosecond pulses Sakai, Hirofumi; Stapelfeldt, H.; Constant, E.; Ivanov, M. Yu.; Matusek, Daniel R.; Wright, James S.; Corkum, P. B. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca.

Nonadiabatic Multielectron Dynamics in Strong Field Molecular Ionization

“…Both show large peaks due to singly and doubly charged parent ions, with little or no fragmentation. This wavelength-independent pattern, which is expected for quasistatic tunnel ionization [14] and adiabatic electronic dynamics, is shown by HT over the whole range 0.8 ,l,1.6 mm.…”

“…At I ϳ 10 14 W͞cm 2 and l 1.45 mm decatetraene (DT) also yields mass spectra which are characteristic of 0031-9007͞01͞86(1)͞51 (4) quasistatic tunnel ionization [14]: stable singly, doubly, and triply charged parent ions with little fragmentation. By contrast, at 0.8 mm DT fragments very strongly at the much lower laser intensity of I ϳ 10 13 W͞cm 2 .…”

Production and Study of Triply Charged Diatomic Ions with Femtosecond Pulses: Application to

“…In a previous study 12 we proposed the use of strong-field femtosecond Raman spectroscopy to determine trication vibrational frequencies. In that work, time-of-flight (TOF) mass spectra were shown which were evidence for formation of all three of the halogen trications Cl 2 3+ ,B r 2 3+ , and I 2…”

“…This coupling is also one-photon resonant near the point of vertical transition from the neutral molecule. The Hamiltonian matrix for the field-dressed 2-state system in atomic units and the RWA has elements H 11 ) E 1 , 12 ǫ 0 , where 1 ) ground state X 2 Π g ,2) excited state 1 2 Π u , ǫ 0 is the electric field strength, µ 12 is the transition moment between the two states, and the 1 2 Π u state was lowered by the photon energy ω L corresponding to a laser wavelength of 800 nm.…”

“…For pulses longer than the vibrational period of Cl 2 3+ , the efficiency drops quickly. 12 The reason for this is that, at the high intensities needed for the production of Cl 2 3+ , its field-free electronic structure is very strongly modified and the ground-state becomes dissociative due to bond-softening at intensities I ∼ 10 13 W/cm 2 and above ( Figure 6). Transient trapping in the laser-induced well on the excited surface is only possible while the field is on (see also Figure 6).…”