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Evidence for Two Body Break Up at a Unique Temperature in High Energy P-Xe and P-Kr Collisions

  • Laszlo Gutay
  • J. A. Gaidos
  • L. J. Gutay
  • A. S. Hirsch
  • R. Mitchell
  • T. V. Ragland
  • R. P. Scharenberg
  • F. Turkot
  • R. B. Willmann
  • C. L. Wilson
Part of the Ettore Majorana International Science Series book series (EMISS, volume 2)

Abstract

This experiment was conducted at FNAL. Using the newly developed warm gas jet facility, hydrogen-noble gas mixtures were injected into the circulating proton beam. During injection, the beam was accelerated between 20 to 400 GeV/c. The target mixtures reported here were 90% H2 — 10% Xe and 82% H2 — 18% Kr by partial pressures. Fragments, emerging from the interaction region, were accepted if they satisfied the ΔE · E · VETO trigger. A typical mass spectrum is shown in Fig. 1. In attempting to find a mass independent disintegration temperature, we plotted the kinetic energy distributions for each fragment mass emerging from Xenon and Krypton. To our surprise, the inverse logaritmic slope, (temperature) varied between 15 and 20 MeV, about a factor of two larger than the nuclear binding energy shown in Fig. 2. There is a clear break in the mass dependence of the temperature in the Carbon-Nitrogen mass range. In trying to understand the origin of this mass dependence, we were able to show that those fragments which are heavier than Carbon had emerged as a decay product of a common parent (progenitor). The mass of this progenitor is denoted by A*P and it is about twenty nucleon masses less than the target mass (A*P ≈ A−20).

Keywords

Fragment Mass Mass Dependence Nucleon Masse Target Mass Common Parent 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • Laszlo Gutay
  • J. A. Gaidos
  • L. J. Gutay
  • A. S. Hirsch
  • R. Mitchell
  • T. V. Ragland
  • R. P. Scharenberg
  • F. Turkot
  • R. B. Willmann
  • C. L. Wilson

There are no affiliations available

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