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A program to measure new energetic particle nuclear interaction cross sections.

T G Guzik1, S Albergo, C X Chen

  • 1Department of Physics and Astronomy, Louisiana State University, Baton Rouge 70808, USA.

Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|October 1, 1994
PubMed
Summary

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Researchers measured nuclear interaction cross sections for heavy ions, crucial for understanding cosmic ray transport and radiation hazards. New data from the Bevalac HISS facility offer insights into these critical physics parameters.

Area of Science:

  • Nuclear physics
  • Astrophysics
  • Space radiation physics

Background:

  • Accurate modeling of cosmic ray transport is essential for space exploration and radiation hazard assessment.
  • Existing nuclear interaction cross-section data are insufficient for heavy projectiles in various target materials.

Purpose of the Study:

  • To conduct new measurements of nuclear interaction cross sections for heavy projectiles (Z >= 2).
  • To provide crucial data for improving galactic and solar cosmic ray transport models.
  • To enhance the accuracy of radiation hazard assessments in space environments.

Main Methods:

  • Utilized the Lawrence Berkeley Laboratory (LBL) Bevalac Heavy Ion Spectrometer (HISS) facility.
  • Experimentally determined cross sections for 20 different projectiles, ranging from Helium-4 to Nickel-58.

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  • Conducted measurements using targets of liquid hydrogen (H2), helium (He), and heavier materials.

    • Main Results:

    • Obtained nuclear interaction cross-section data for heavy projectiles in the specified energy range (393-910 MeV/nucleon).
    • Presented preliminary results from data analysis.
    • Compared experimental data with existing measurements and theoretical prediction formulas.

    Conclusions:

    • The new cross-section data are vital for refining models of cosmic ray propagation through space.
    • The findings contribute to a better understanding of radiation environments beyond Earth's atmosphere.
    • The study highlights the importance of experimental measurements for validating theoretical predictions in nuclear astrophysics.