Extreme Sensitivity of Differential Momentum Transfer Cross Sections to Target Atom Initial Conditions

R. E. Olson and J. Fiol
Phys. Rev. Lett. 95, 263203 – Published 23 December 2005

Abstract

Heavy-particle cross sections differential in the momentum transferred to the target are investigated using the classical trajectory Monte Carlo method. With the 3.6MeV/u Au53++He system as a test case, it is shown that these cross sections are extremely sensitive to the initial target temperature. In particular, when thermal motion is varied for one of the target’s initial momentum components between 0 and 25 K the absolute cross sections vary by orders of magnitude and, in addition, their relative shapes undergo major changes. We find that by setting one of the target’s transverse momenta to a temperature of 16 K, previously reported major discrepancies between theory and experiment are removed.

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  • Received 24 June 2005

DOI:https://doi.org/10.1103/PhysRevLett.95.263203

©2005 American Physical Society

Authors & Affiliations

R. E. Olson*

  • Physics Department, University of Missouri-Rolla, Rolla, Missouri 65401, USA

J. Fiol

  • Instituto Balseiro and Centro Atómico Bariloche, 8400 S. C. de Bariloche, Río Negro, Argentina

  • *Electronic address: olson@umr.edu
  • Electronic address: fiol@cab.cnea.gov.ar

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Issue

Vol. 95, Iss. 26 — 31 December 2005

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