Superelastic electron scattering involving the collisional de-excitation of laser-excited 138 Ba ( . . . 6s6p 1 P 1 ) atoms to the (. . . 6s 2 1 S 0 ) ground state has been used to measure electron impact coherence parameters for the related (. . . 6s 2 1 S 0 )-(. . . 6s6p 1 P 1 ) inelastic process. Measurements of the natural parameters: γ and P + lin were made for excitation at impact energies of 5, 7.5, 9, 10 and 15 eV. Experimental data are compared with available theoretical results.
Superelastic electron scattering involving the collisional
de-excitation of laser-excited 138Ba(...6s6p 1P1)
atoms to the (...6s2 1S0) ground state has been used to
measure electron impact coherence parameters for the related
(...6s2 1S0) to (...6s6p 1P1) inelastic
process. Measurements of the orbital angular momentum transfer
parameter, Lperp+, were made for excitation at impact
energies of 7, 8.5, 11 and 16 eV. Experimental data are
compared with available theoretical results.
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