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- W2012208528 abstract "An optical-optical double resonance procedure is used to compare the relative populations of e/f spin components of the $^{2}mathrm{ensuremath{Sigma}}_{mathrm{g}}^{+}$(v=7) rotational manifold resulting from the collision-induced electronic transitions in ${mathrm{N}}_{2}^{+}$ for the cases of large and small energy gaps. Rotational levels of the $^{2}mathrm{ensuremath{Pi}}_{mathrm{ui}}$(v=3 or 4) vibrational state of ${mathrm{N}}_{2}^{+}$ are selectively populated with a pump laser. Transitions to rotational levels of the $^{2}mathrm{ensuremath{Sigma}}_{mathrm{g}}^{+}$(v=7) level due to collisions with bath gas helium atoms at room temperature are monitored by scanning the lines of the B-X(5,7) band with a second, probe laser. The relaxation pathways A(v=3)ensuremath{rightarrow}X(v=7) and A(v=4)ensuremath{rightarrow}X(v=7) traverse energy gaps (ensuremath{Delta}E) of ensuremath{sim}0 and ensuremath{sim}1760 ${mathrm{cm}}^{mathrm{ensuremath{-}}1}$, respectively. Perturbation of the rotational levels of the ${mathit{B}}^{2}$${mathrm{ensuremath{Sigma}}}_{mathit{u}}^{+}$(v=5) state by the ${mathit{A}}^{2}$${mathrm{ensuremath{Pi}}}_{mathrm{u}1/2}$(v=17) manifold allows for the e/f, spin-rotation splitting of the lines of the B-X(5,7) probe laser scan to be resolved. The effects of these perturbations on the relative intensities of the B-X(5,7) lines have been taken into account. The intensity patterns for collision-induced transitions across the two widely different energy gaps are nearly identical, indicating that the propensities for this case have an insignificant energy-gap dependence. These detailed propensities from selectively excited rotational levels of the A(v=4 or 3) level to the individual, nearly degenerate rotational levels of the X(v=7) manifold are compared with theoretical models for inelastic scattering between $^{2}mathrm{ensuremath{Pi}}$ and $^{2}mathrm{ensuremath{Sigma}}$ electronic states." @default.
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- W2012208528 date "1991-02-01" @default.
- W2012208528 modified "2023-09-26" @default.
- W2012208528 title "Energy-gap dependence for inelastic collision-induced electronic transitions in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msubsup><mml:mrow><mml:mi mathvariant=normal>N</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msubsup></mml:mrow></mml:math>" @default.
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- W2012208528 doi "https://doi.org/10.1103/physreva.43.1306" @default.
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