Analysis of gross vibrational-rotational energy-loss spectra in Li{sup +}-N{sub 2} collisions with the hard-potential model

Journal Article · Wed Jun 15 00:00:00 EDT 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.71.062701· OSTI ID:20717913

Nakamura, Masato; Ichimura, Atsushi ^[1]

---

1. College of Science and Technology, Nihon University, Funabashi 274-8501 (Japan)

The energy-loss spectra in large-angle Li{sup +}+N{sub 2} scatterings are analyzed with the hard-potential model recently proposed, along with the previous hard-shell model. The respective roles of rotational and vibrational excitations are revealed through systematic comparisons of experimental spectra with the models in a wide range of energies (8-100 eV) and angles (40 deg. -120 deg.). The effect of vibrational excitation is found to manifest itself in the shifts of double peaks. Their energy dependence is accounted for by the shape of the equipotential surface as well as by the vibrational suddenness in a collision. The peak position is shown to be sensitive to the curvature of the surface at the orientation angle of 90 deg., hence to the three-body potential. The unacceptable result of a previous semiclassical calculation is suggested to come from the inappropriate potential taken.

• OSTI ID: 20717913
• Journal Information: Physical Review. A, Vol. 71, Issue 6; Other Information: DOI: 10.1103/PhysRevA.71.062701; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CATIONS
COMPARATIVE EVALUATIONS
ENERGY DEPENDENCE
ENERGY TRANSFER
ENERGY-LOSS SPECTROSCOPY
EV RANGE
EXCITATION
ION-MOLECULE COLLISIONS
LITHIUM
LITHIUM IONS
NITROGEN
ORIENTATION
POTENTIALS
ROTATIONAL STATES
SCATTERING
SEMICLASSICAL APPROXIMATION
SHELL MODELS
THREE-BODY PROBLEM
VIBRATIONAL STATES