Charge equilibrium and radiation of low-energy cosmic rays passing through interstellar medium
Journal Article
·
· Astrophys. J.; (United States)
The charge equilibrium and radiation an oxygen and an iron beam in the MeV per nucleon energy range, representing a typical beam of low-energy cosmic rays passing through the interstellar medium, are considered. Electron loss of the beam has been taken into account by means of the first Born approximation allowing for the target atom to remain unexcited, or to be excited to all possible states. Electron-capture cross sections have been calculated by means of the scaled Oppenheimer-Brinkman-Kramers approximation, taking into account of atomic shells of the target atoms and capture into all excited states of the projectile. The capture and loss cross sections are found to be within 20%--30% of the existing experimental values for most of the cases considered. Radiation of the beam due to electron capture into the excited states of the ion, collisional excitation, and collisional inner-shell ionization, taking into account the fluorescence yield of the ions has been considered. Effective X-ray production cross sections and mutliplicities for the most energetic X-ray lines emitted by the Fe and O beams have been calculated, and error estimates made for the results.
- Research Organization:
- Stratosphere Physics and Chemistry Branch, Laboratory for Planetary Atmospheres, NASA Goddard Space Flight Center
- OSTI ID:
- 6094533
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 229:3; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640101* -- Astrophysics & Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOM COLLISIONS
CAPTURE
CHARGE EXCHANGE
COLLISIONS
COSMIC NUCLEI
COSMIC RADIATION
CROSS SECTIONS
CRYOGENIC FLUIDS
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE
ELEMENTS
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
INTERSTELLAR SPACE
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONIZING RADIATIONS
IRON
METALS
NONMETALS
NUCLEI
OXYGEN
RADIATIONS
SPACE
TRANSITION ELEMENTS
X RADIATION
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOM COLLISIONS
CAPTURE
CHARGE EXCHANGE
COLLISIONS
COSMIC NUCLEI
COSMIC RADIATION
CROSS SECTIONS
CRYOGENIC FLUIDS
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE
ELEMENTS
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
INTERSTELLAR SPACE
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONIZING RADIATIONS
IRON
METALS
NONMETALS
NUCLEI
OXYGEN
RADIATIONS
SPACE
TRANSITION ELEMENTS
X RADIATION