Accelerator simulation of astrophysical processes

Details Accelerator simulation of astrophysical processes Accelerator simulation of astrophysical processes

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983itns...30.1169t&link_type=abstract

IEEE Transactions on Nuclear Science (ISSN 0018-9499), vol. NS-30, April 1983, p. 1169-1172.

Computer Science

2

Alpha Particles, Ion Accelerators, Meteoritic Composition, Radioactive Materials, Reaction Kinetics, Stellar Evolution, Analog Simulation, Chemical Fractionation, Chondrites, Isotope Separation, Mass Ratios, Sputtering, Supernovae

Scientific paper

Phenomena that involve accelerated ions in stellar processes that can be simulated with laboratory accelerators are described. Stellar evolutionary phases, such as the CNO cycle, have been partially explored with accelerators, up to the consumption of He by alpha particle radiative capture reactions. Further experimentation is indicated on reactions featuring N-13(p,gamma)O-14, O-15(alpha, gamma)Ne-19, and O-14(alpha,p)F-17. Accelerated beams interacting with thin foils produce reaction products that permit a determination of possible elemental abundances in stellar objects. Additionally, isotopic ratios observed in chondrites can be duplicated with accelerator beam interactions and thus constraints can be set on the conditions producing the meteorites. Data from isotopic fractionation from sputtering, i.e., blasting surface atoms from a material using a low energy ion beam, leads to possible models for processes occurring in supernova explosions. Finally, molecules can be synthesized with accelerators and compared with spectroscopic observations of stellar winds.

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