The Isodose Line Field of Cosmic Ray Heavy Nuclei Tracks in Tissue.
Abstract
The microdosimetric structure of a track of a heavy nucleus of Z = 26 (Fe) for the terminal section of 12 cm in tissue as it follows from theory is presented in form of the isodose line field. The similarities and differences of the field as compared to gamma rays or alpha particles are pointed out. It is shown that only the core of the last few millimeters of the Fe track in tissue differs substantially from conventional radiations in exhibiting local dose levels larger by several orders of magnitude. Since the mode of action of such 'microbeam' hits on living matter is as yet incompletely understood, measuring exposure with a dosimetric unit similar to the rem is at present beyond reach. Therefore, record keeping on personnel exposures remains limited, for the time being, to the physical parameters. As radiobiological research with heavy ions progresses, it should eventually be possible to evaluate such records in terms of 'dose equivalents'. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1977
- Accession Number
- ADA047269
Entities
People
- Hermann J. Schaefer
Organizations
- University of West Florida