The production of Be(7) and C(11) from carbon, nitrogen, and oxygen by 75-MeV electrons
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Authors
Lusk, James Allen
Pomykal, Glenn Waldo
Subjects
Photodisintegration
Electrodisintegration
Be(7)
C(11)
N(13)
Electrodisintegration
Be(7)
C(11)
N(13)
Advisors
Dahl, Harvey A.
Date of Issue
1967-06
Date
June 1967
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
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.
Type
Thesis
Description
Series/Report No
Department
Physics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
53 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.