Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 6 of 6
Full-Text Articles in Physical Sciences and Mathematics
Particle Tracks In Diverse Media, Robert Katz
Particle Tracks In Diverse Media, Robert Katz
Robert Katz Publications
When energetic heavy ions pass into a medium, they create a trail of excitations, ionizations, and secondary electrons whose effect is represented through their average radial “dose” distribution. The structure of the track depends on this and on the observed “end point.” Tracks may be observed microscopically or through the gross effect of a particle beam. We take the medium to be an assemblage of “targets” whose response to gamma rays is approximated by the cumulative Poisson distribution. While most detectors are 1-hit systems, we have discovered 2-hit and up to 8-hit response. Folding the gamma-ray response into the radial …
The Response Of The Alanine Detector After Charged-Particle And Neutron Irradiations, M. P. R. Waligorski, G. Danialy, Robert Katz
The Response Of The Alanine Detector After Charged-Particle And Neutron Irradiations, M. P. R. Waligorski, G. Danialy, Robert Katz
Robert Katz Publications
Radiosensitivity parameters of track structure theory, representing alanine as a one-hit detector, have been fitted for this free-radical amino-acid system on the basis of the available experimental data on the relative effectiveness of alanine after charged particle and neutron irradiations. The experimental data set can be reproduced by theoretical calculations, roughly to within experimental accuracy. A charged-particle “equivalent radiation” is introduced which can mimic the response of alanine to neutron irradiations. Implications of the results of model calculations for alanine on the shape of the radial distribution of δ-ray dose postulated by track theory, are discussed.
Detector Response To Swift Heavy Ions, Robert Katz
Detector Response To Swift Heavy Ions, Robert Katz
Robert Katz Publications
Track theory is a description of the structure of particle tracks which characterizes the response of many different sorts of "detectors" to energetic heavy ions. It is a parametric rather than a mechanistic description. The medium is a black box containing targets whose response to gamma rays is described by the cumulative Poisson distribution. The response to swift heavy ions is intimately related to the response to gamma rays through the radial distribution of dose about the ion’s path.
Track “Core” Effects In Heavy Ion Radiolysis, Robert Katz, Guo-Rong Huang
Track “Core” Effects In Heavy Ion Radiolysis, Robert Katz, Guo-Rong Huang
Robert Katz Publications
By assuming that HO2● radical production in water and H2 production in benzene are 2 hit processes, and applying the concepts of track physics, we are able to obtain a parametric fit to the yields of these reactions by heavy ion radiolysis from knowledge of the radial dose distribution about a heavy ion’s path. We make no use of the concept of a track core, for no clearly definable track core appears in our calculations of the radial dose distribution. Instead we calculate an action cross section σ from the assumed 2 hit response to γ-rays. The …
Perspectives On The Development Of Track Physics, Robert Katz
Perspectives On The Development Of Track Physics, Robert Katz
Robert Katz Publications
Let me thank all of you for being here, Tony Starace, for having conceived this meeting, and Bob Wood and Matesh Varma, for over 20 years of support without which there would have been no track physics. There are many others to thank: the students, postdoctorates, and senior visitors who actually did all the work, and the many investigators around the world who made measurements that proved to be essential to developing and testing the notions of particle tracks.
This enterprise began when I undertook to rewrite an introductory physics text by Henry Semat to adapt it to a calculus-based …
Robert Katz: A Biographical Sketch, M. Eugene Rudd, John F. Fowler
Robert Katz: A Biographical Sketch, M. Eugene Rudd, John F. Fowler
Robert Katz Publications
Robert Katz was born in 1917 in New York City of Russian- Jewish immigrant parents. He grew up in the Bronx, attended Brooklyn College where he received his B.A. degree in 1937. A year later he was awarded the M.A. degree in physics at Columbia University. During World War II he worked for the Air Force at Wright Field in Ohio. After the war he returned to academia as a graduate student at the University of Illinois, where he earned the Ph.D. degree in physics in 1949. From that year he was a member of the Department of Physics at …