6 research outputs found
Time-resolved spectroscopy of the excited electronic state of reaction centers of Rhodopseudomonas viridis
The spectral properties of the excited electronic state of the reaction centers of Rhodopseudomonas (Rps.) viridis are studied by dichroic transient absorption spectroscopy with sub-picosecond time resolution. The theoretical analysis of the experimental results allows the assignment of the transient absorption from two dimer bands of the special pair and show its excitonic coupling to other pigments
Effects of buried high-Z layers on fast electron propagation
By extending a prior model [A.R. Bell, J.R. Davies, S.M. Guerin, Phys. Rev. E
58, 2471 (1998)], the magnetic field generated during the transport of a
fast electron beam driven by an ultraintense laser in a solid target is derived
analytically and applied to estimate the effect of such field on fast electron propagation
through a buried high-Z layer in a lower-Z target. It is found that the effect gets weaker
with the increase of the depth of the buried layer, the divergence of the fast electrons,
and the laser intensity, indicating that magnetic field effects on the fast electron
divergence as measured from Ka X-ray emission may need to be
considered for moderate laser intensities. On the basis of the calculations, some
considerations are made on how one can mitigate the effect of the magnetic field generated
at the interface