Nuclear interactions of high energy heavy ions and applications in astrophysics. Final technical report

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Description

Projectile fragmentation experiments have been conducted at the LBL Bevalac accelerator, utilizing both the B40 and the HISS facilities, to produce a dataset of 36 beam/energy combinations covering projectiles from {sup 4}He to {sup 58}Ni and various energies from 170--2100 MeV/nucleon. While some runs were subject to beam instabilities, magnet problems or low statistics, there remains a large dataset which is still being analyzed. The results will be used to investigate the physics of the intermediate energy fragmentation process and will find application in the astrophysics of cosmic ray propagation in the galaxy. An overview of the science goals and ... continued below

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97 p.

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Wefel, J.P. & Guzik, T.G. June 25, 1998.

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Description

Projectile fragmentation experiments have been conducted at the LBL Bevalac accelerator, utilizing both the B40 and the HISS facilities, to produce a dataset of 36 beam/energy combinations covering projectiles from {sup 4}He to {sup 58}Ni and various energies from 170--2100 MeV/nucleon. While some runs were subject to beam instabilities, magnet problems or low statistics, there remains a large dataset which is still being analyzed. The results will be used to investigate the physics of the intermediate energy fragmentation process and will find application in the astrophysics of cosmic ray propagation in the galaxy. An overview of the science goals and rationale is followed by presentation of the experimental techniques and apparatus that has been employed. Data analysis, including both detector subsystem and accelerator calibration, is discussed with emphasis on the unique features of the dataset and the analysis problems being addressed. Results from the experiments are presented throughout to illustrate the status of the analysis, e.g., momentum distribution widths. Total, Elemental and Isotopic cross sections from various beam/energy combinations are presented, including the first data on {sup 32}S fragmentation and the complete isotopic fragmentation cross sections for {sup 28}Si interacting in both Carbon and Hydrogen targets. The new results are compared to any existing data and to formulae used to predict unmeasured cross sections. The size and complexity of the dataset and the required detail of the analysis precluded finishing the full analysis under the subject grant. Plans for additional analysis are presented, and these will be carried out in coming years as time and resources permit.

Physical Description

97 p.

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INIS; OSTI as DE99001164

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  • Other Information: PBD: 25 Jun 1998

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  • Other: DE99001164
  • Report No.: DOE/ER/40147--12
  • Grant Number: FG05-84ER40147
  • DOI: 10.2172/291181 | External Link
  • Office of Scientific & Technical Information Report Number: 291181
  • Archival Resource Key: ark:/67531/metadc688407

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  • June 25, 1998

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  • July 25, 2015, 2:20 a.m.

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  • Nov. 5, 2015, 1:36 p.m.

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Wefel, J.P. & Guzik, T.G. Nuclear interactions of high energy heavy ions and applications in astrophysics. Final technical report, report, June 25, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc688407/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.