Electron-transfer collisions of low-energy multicharged nitrogen ions with H/sub 2/ and N/sub 2/

Journal Article · Sat Oct 31 23:00:00 EST 1987 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.36.4261· OSTI ID:5585842

Wang, H; Church, D A

A stored-ion collision technique has been used to study the charge-changing collisions of multicharged nitrogen ions with H/sub 2/ and N/sub 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 N/sup 3+/ with H/sub 2/, for which calculations by Gargaud and McCarroll were available, the cross section for electron capture was obtained from the rate coefficient using v-italic-bar, where v-italic-bar 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 N/sup q//sup +/ charges q of 2, 3, and 4, respectively. The results of the rate coefficient determinations are k(N/sup 2 +/,H/sub 2/) = (7.8(1.2)) x 10/sup -10/ cm/sup 3//s, k(N/sup 3 +/,H/sub 2/) = (5.4(0.8)) x 10/sup -11/ cm/sup 3//s, k(N/sup 4 +/,H/sub 2/) = (4.2(0.6)) x 10/sup -10/ cm/sup 3//s, k(N/sup 2 +/,N/sub 2/) = (2.6(0.3)) x 10/sup -9/ cm/sup 3//s, k(N/sup 3 +/,N/sub 2/) = (3.5(0.4)) x 10/sup -10/ cm/sup 3//s, and k(N/sup 4 +/,N/sub 2/) = (2.0(0.3)) x 10/sup -10/ cm/sup 3//s.

• Research Organization: Department of Physics, Texas A and M University, College Station, Texas 77843-4242
• OSTI ID: 5585842
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 36:9; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
CHARGE EXCHANGE
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DATA
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 01-10
EXPERIMENTAL DATA
HYDROGEN
INFORMATION
ION COLLISIONS
ION RINGS
ION-MOLECULE COLLISIONS
IONS
MOLECULE COLLISIONS
MULTICHARGED IONS
NITROGEN
NITROGEN IONS
NONMETALS
NUMERICAL DATA