Width of Heavy-Ion Tracks in Emulsion

Authors

• E. J. Kobetich, University of Nebraska-Lincoln
• Robert Katz, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

June 1968

Comments

Published in Physical Review Volume 170, Number 2. 10 June 1968. Copyright © 1968 American Physical Society. Used by permission. Online at http://prola.aps.org/

Abstract

Profiles of the solid core of long, flat, ending tracks of heavy primary cosmic rays in Ilford G-5 emulsion have been measured by manually tracing their enlarged (3500X) photographic image. These measurements agree well in the ending 3000 μ of residual range (β <0.3) with a reformulated theory of track width based on computation of the spatial distribution of ionization energy. The measured core width in G-5 emulsion is the sum of the sensitized cylinder diameter, at which 6000 erg/cm³ of ionization energy is deposited by δ rays, and the diameter of a developed grain.