The production of Be(7) and C(11) from carbon, nitrogen, and oxygen by 75-MeV electrons
Lusk, James Allen
Pomykal, Glenn Waldo
Dahl, Harvey A.
MetadataShow full item record
An investigation was made of the electromagnetic disintegration of carbon, nitrogen, and oxygen leading to production of the unstable nuclei Be(7) and C(11). Targets of graphite, melamine, and water were bombarded with 75-MeV electrons from the Naval Postgraduate School linear accelerator. The disintegration fragments of interest were counted by detecting their decay activity, Be(7) by the 477-Kev gamma ray from its daughter nucleus and C(11) by the 511-Kev photons from the annihilation of its emitted positron. Electron and photon effects were separated by interposing an additional radiator for one bombardment of a given type of target, then repeating with a similar target without the radiator. Radioactive fragments of Be(7) and C(11) were found in all bombardments; N(13) was also found in bombardments of melamine and water. Electrodisintegration cross sections for processes yielding C(11) were found to range from 17.5 microbarns for carbon down to 0.3 microbarns for oxygen. The corresponding values for processes yielding Be(7) ranged from 1.3 microbams to 0.14 microbarns. Integrated photodisintegration cross sections were found to be approximately 50 times greater than these.
Approved for public release, distribution unlimited
Showing items related by title, author, creator and subject.
The production of Be(7), C(11), N(13), or O(15) from carbon, nitrogen and oxygen by 87-mev electrons. Higgins, Robert Martin (Monterey, California. U.S. Naval Postgraduate School, 1969);Targets of graphite, melamine and water were bombarded with 87- MeV electrons from the Naval Postgraduate School linear accelerator in order to investigate the production of the unstable nuclei Be(7) , C(11) , N(13) , ...
Atomic and molecular ejection from ion-bombarded reacted single-crystal surfaces. Oxygen on copper(100) Garrison, B.J.; Winograd, N.; Harrison, D.E., Jr. (American Physical Society, 1978-12-01);The trajectories of atomic and molecular species ejected from an ion-bombarded reacted single-crystal surface have been calculated using classical dynamics. As a model system, oxygen has been adsorbed in various coverages ...
Computer simulation studies of sputtering and multimer formation from clean and oxygen reacted surfaces of titanium, vanadium and niobium. Mathis, Michael G. (Monterey, California. Naval Postgraduate School, 1983-12);The NPS computer simulation model was used to investigate the sputtering by 1.0 keV argon bombardment of clean and oxygen reacted monocrystalline titanium, vanadium and niobium. Variations in yield, energy and angular ...