Isotope effects on the charge transfer into the n=1, 2, and 3 shells of He{sup 2+} in collisions with H, D, and T

Journal Article · Sat May 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.052704· OSTI ID:21408831

Stolterfoht, N ^[1]; Cabrera-Trujillo, R ^[1]; Krstic, P S ^[2]; Hoekstra, R ^[3]; Oehrn, Y; Deumens, E; Sabin, J R ^[1]

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1. Quantum Theory Project, Departments of Physics and Chemistry, University of Florida, Gainesville, Florida 32611-8435 (United States)
2. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
3. KVI Atomic Physics, University of Groningen, NL-9747 AA Groningen (Netherlands)

Processes for charge transfer into He{sup 2+} colliding with the atomic isotopes hydrogen (H), deuterium (D), and tritium (T) are theoretically studied at collision energies as low as 30 eV/amu. Probabilities and cross sections for electron capture into different shells of the projectile are calculated using an ab initio approach which solves the time-dependent Schroedinger equation. The results are interpreted in terms of radial and rotational couplings between molecular orbitals. The probabilities exhibit strong Stueckelberg oscillations for charge transfer into shells with the principal quantum numbers n=2 and 3 due to radial coupling mechanisms in specific ranges of the impact parameter. The total cross sections for charge transfer, evaluated for a given shell, differ by orders of magnitude, as different isotopes are used in the collisions. The isotope effect increases significantly for decreasing n=3, 2, and 1. This finding is attributed to the influence of the rotational coupling mechanism, which is strongly affected by the distance of closest approach between the collision partners.

• OSTI ID: 21408831
• Journal Information: Physical Review. A, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevA.81.052704; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
COLLISIONS
COUPLING
DEUTERIUM
ELECTRON CAPTURE
EV RANGE
HELIUM IONS
HYDROGEN
IMPACT PARAMETER
ISOTOPE EFFECTS
PROBABILITY
QUANTUM NUMBERS
SCHROEDINGER EQUATION
TIME DEPENDENCE
TOTAL CROSS SECTIONS
TRITIUM
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CAPTURE
CHARGED PARTICLES
CROSS SECTIONS
DIFFERENTIAL EQUATIONS
ELEMENTS
ENERGY RANGE
EQUATIONS
HYDROGEN ISOTOPES
IONS
ISOTOPES
LIGHT NUCLEI
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PARTIAL DIFFERENTIAL EQUATIONS
RADIOISOTOPES
STABLE ISOTOPES
WAVE EQUATIONS
YEARS LIVING RADIOISOTOPES