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- W2022177581 abstract "A stored-ion collision technique has been used to study the charge-changing collisions of multicharged nitrogen ions with ${mathrm{H}}_{2}$ and ${mathrm{N}}_{2}$ target gases. The ions were produced inside a Penning trap with use of electron-impact ionization. The time constants for exponential ion loss by charge-changing collisions were measured at several target-gas densities, and from these time constants and densities the rate coefficients for electron capture were calculated. For the collision of ${mathrm{N}}^{3+}$ with ${mathrm{H}}_{2}$, for which calculations by Gargaud and McCarroll were available, the cross section for electron capture was obtained from the rate coefficient using vifmmodebarelsetextasciimacronfi{}, where vifmmodebarelsetextasciimacronfi{} is the rms ion velocity. The relationships of the other measurements to available theory and to ion-beam measurements at higher energies are discussed. Rate coefficients were obtained at mean ion energies near 1.1, 1.65, and 2.3 eV for ${mathrm{N}}^{mathrm{q}+}$ charges q of 2, 3, and 4, respectively. The results of the rate coefficient determinations are k(${mathrm{N}}^{2+}$,${mathrm{H}}_{2}$)=[7.8(1.2)]ifmmodetimeselsetexttimesfi{}${10}^{mathrm{ensuremath{-}}10}$ ${mathrm{cm}}^{3}$/s, k(${mathrm{N}}^{3+}$,${mathrm{H}}_{2}$)=[5.4(0.8)]ifmmodetimeselsetexttimesfi{}${10}^{mathrm{ensuremath{-}}11}$ ${mathrm{cm}}^{3}$/s, k(${mathrm{N}}^{4+}$,${mathrm{H}}_{2}$)=[4.2(0.6)]ifmmodetimeselsetexttimesfi{}${10}^{mathrm{ensuremath{-}}10}$ ${mathrm{cm}}^{3}$/s, k(${mathrm{N}}^{2+}$,${mathrm{N}}_{2}$)=[2.6(0.3)]ifmmodetimeselsetexttimesfi{}${10}^{mathrm{ensuremath{-}}9}$ ${mathrm{cm}}^{3}$/s, k(${mathrm{N}}^{3+}$,${mathrm{N}}_{2}$)=[3.5(0.4)]ifmmodetimeselsetexttimesfi{}${10}^{mathrm{ensuremath{-}}10}$ ${mathrm{cm}}^{3}$/s, and k(${mathrm{N}}^{4+}$,${mathrm{N}}_{2}$)=[2.0(0.3)]ifmmodetimeselsetexttimesfi{}${10}^{mathrm{ensuremath{-}}10}$ ${mathrm{cm}}^{3}$/s." @default.
- W2022177581 created "2016-06-24" @default.
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- W2022177581 date "1987-11-01" @default.
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- W2022177581 title "Electron-transfer collisions of low-energy multicharged nitrogen ions withH2andN2" @default.
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- W2022177581 doi "https://doi.org/10.1103/physreva.36.4261" @default.
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