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Title: Dynamic effects in fragmentation reactions.

Abstract

Fragmentation reactions offer a useful tool to study the spectroscopy of halo nuclei, but the large extent of the halo wave function makes the reaction theory more difficult. The simple reaction models based on the eikonal approximation for the nuclear interaction or first-order perturbation theory for the Coulomb interaction have systematic errors that they investigate here, comparing to the predictions of complete dynamical calculations. They find that stripping probabilities are underpredicted by the eikonal model, leading to extracted spectroscopy strengths that are two large. In contrast, the Coulomb excitation is overpredicted by the simple theory. They attribute this to a screening effect, as is well known in the Barkas effect on stopping powers. The errors decrease with beam energy as E{sub beam}{sup -1}, and are not significant at beam energies above 50 MeV/u. At lower beam energies, the effects should be taken into account when extracting quantitative spectroscopic strengths.

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab., IL (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
797880
Report Number(s):
ANL/PHY/CP-107208
Journal ID: ISSN 0375--9687; TRN: US200215%%470
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Conference
Resource Relation:
Journal Volume: 146; Conference: Yukawa International Seminar 2001 (YKIS01) : Physics of Unstable Nuclei, Kyoto (JP), 11/05/2001--11/10/2001; Other Information: PBD: 26 Mar 2002
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COULOMB EXCITATION; EIKONAL APPROXIMATION; FRAGMENTATION; NUCLEI; PERTURBATION THEORY; PHYSICS; SPECTROSCOPY; STOPPING POWER; WAVE FUNCTIONS

Citation Formats

Bertsch, G F, and Esbensen, H. Dynamic effects in fragmentation reactions.. United States: N. p., 2002. Web. doi:10.1143/PTPS.146.319.
Bertsch, G F, & Esbensen, H. Dynamic effects in fragmentation reactions.. United States. https://doi.org/10.1143/PTPS.146.319
Bertsch, G F, and Esbensen, H. 2002. "Dynamic effects in fragmentation reactions.". United States. https://doi.org/10.1143/PTPS.146.319. https://www.osti.gov/servlets/purl/797880.
@article{osti_797880,
title = {Dynamic effects in fragmentation reactions.},
author = {Bertsch, G F and Esbensen, H},
abstractNote = {Fragmentation reactions offer a useful tool to study the spectroscopy of halo nuclei, but the large extent of the halo wave function makes the reaction theory more difficult. The simple reaction models based on the eikonal approximation for the nuclear interaction or first-order perturbation theory for the Coulomb interaction have systematic errors that they investigate here, comparing to the predictions of complete dynamical calculations. They find that stripping probabilities are underpredicted by the eikonal model, leading to extracted spectroscopy strengths that are two large. In contrast, the Coulomb excitation is overpredicted by the simple theory. They attribute this to a screening effect, as is well known in the Barkas effect on stopping powers. The errors decrease with beam energy as E{sub beam}{sup -1}, and are not significant at beam energies above 50 MeV/u. At lower beam energies, the effects should be taken into account when extracting quantitative spectroscopic strengths.},
doi = {10.1143/PTPS.146.319},
url = {https://www.osti.gov/biblio/797880}, journal = {},
issn = {0375--9687},
number = ,
volume = 146,
place = {United States},
year = {Tue Mar 26 00:00:00 EST 2002},
month = {Tue Mar 26 00:00:00 EST 2002}
}

Conference:
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