Radiation quality of beams of negative pions [electronic resource].
- Los Alamos, N.M. : Los Alamos National Laboratory, 1981. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: 11 : digital, PDF file
- Additional Creators:
- Los Alamos National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- As a negative pion stops in tissue, it attaches itself to an adjacent atom to form a mesonic atom. Subsequently, the wave function of the pion interacts with that of the nucleus and the pion is absorbed. Because the energy associated with the rest mass of the pion is greater than the separation energy of the nuclear particles, the nucleus disintegrates (pion star). In tissue, approximately 40 MeV goes into overcoming the binding energies; 20 MeV goes into kinetic energy of charged particles; 80 MeV goes into kinetic energy of neutrons. In cases where biological studies are performed with beams of negative pions, as much as 20% of the total absorbed dose in the treatment volume and about 50% of the high-LET dose (> 100 keV/..mu..m) can result from neutrons. The degree of biological response and the variation of that response throughout the treatment volume can be altered by the neutron dose.
- Published through SciTech Connect., 01/01/1981., "la-ur-81-2767", " conf-810763-2", "DE82000567", International workshop on pion and heavy ion radiotherapy: preclinical and clinical studies, Vancouver, BC, Canada, Jul 1981., and Brenner, D.J.; Dicello, J.F.
- Funding Information:
View MARC record | catkey: 14672083