TY - JOUR
T1 - Resonances in multiphoton ionization of He at the KrF laser wavelength
AU - Glass, D.H.
AU - Burke, P.G.
PY - 2000/2/14
Y1 - 2000/2/14
N2 - Multiphoton ionization rates have been calculated for He at the KrF laser wavelength of 248 nm and for laser intensities up to 6 × 1014W cm-2using the R -matrix Floquet method. For intensities above that at which channel closing takes place it is found that intermediate five-photon resonances with bound states strongly influence the total rate. In particular, the resonance between the ground state and the 1s2p 1 Postate is found to occur at a laser intensity of 5 × 1014W cm-2 . This resonance is investigated at several neighbouring wavelengths and its prominent nature, which is discussed in terms of a proposed nearby laser-induced degenerate state, should enable it to be observed experimentally.
AB - Multiphoton ionization rates have been calculated for He at the KrF laser wavelength of 248 nm and for laser intensities up to 6 × 1014W cm-2using the R -matrix Floquet method. For intensities above that at which channel closing takes place it is found that intermediate five-photon resonances with bound states strongly influence the total rate. In particular, the resonance between the ground state and the 1s2p 1 Postate is found to occur at a laser intensity of 5 × 1014W cm-2 . This resonance is investigated at several neighbouring wavelengths and its prominent nature, which is discussed in terms of a proposed nearby laser-induced degenerate state, should enable it to be observed experimentally.
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-0033896790&partnerID=MN8TOARS
UR - https://www.scopus.com/pages/publications/0033896790
U2 - 10.1088/0953-4075/33/3/310
DO - 10.1088/0953-4075/33/3/310
M3 - Article
SN - 0953-4075
VL - 33
SP - 1
EP - 14
JO - Journal of Physixs B: Atomic, Molecular and Optical Physics
JF - Journal of Physixs B: Atomic, Molecular and Optical Physics
IS - 3
M1 - 407
ER -