Electron screening in molecular fusion reactions

T. D. Shoppa, M. Jeng, S. E. Koonin, K. Langanke, R. Seki

Research output: Contribution to journalArticle

Abstract

Recent laboratory experiments have measured fusion cross sections at center-of-mass energies low enough for the effects of atomic and molecular electrons to be important. To extract the cross section for bare nuclei from these data (as required for astrophysical applications), it is necessary to understand these screening effects. We study electron screening effects in the low-energy collisions of Z = 1 nuclei with hydrogen molecules. Our model is based on a dynamical evolution of the electron wave functions within the TDHF scheme, while the motion of the nuclei is treated classically. We find that at the currently accessible energies the screening effects depend strongly on the molecular orientation. The screening is found to be larger for molecular targets than for atomic targets, due to the reflection symmetry in the latter. The results agree fairly well with data measured for deuteron collisions on molecular deuterium and tritium targets.

Original languageEnglish (US)
Pages (from-to)387-402
Number of pages16
JournalNuclear Physics, Section A
Volume605
Issue number3
DOIs
StatePublished - Aug 12 1996

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screening
fusion
nuclei
electrons
collisions
cross sections
tritium
deuterons
center of mass
energy
deuterium
astrophysics
wave functions
symmetry
hydrogen
molecules

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Electron screening in molecular fusion reactions. / Shoppa, T. D.; Jeng, M.; Koonin, S. E.; Langanke, K.; Seki, R.

In: Nuclear Physics, Section A, Vol. 605, No. 3, 12.08.1996, p. 387-402.

Research output: Contribution to journalArticle

Shoppa, T. D. ; Jeng, M. ; Koonin, S. E. ; Langanke, K. ; Seki, R. / Electron screening in molecular fusion reactions. In: Nuclear Physics, Section A. 1996 ; Vol. 605, No. 3. pp. 387-402.
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