Abstract
The fusion reactions6Li(p, α)3He,6Li(d, α)4He, and7Li(p, α)4He have been studied over the c.m. energy rangeE=10 to 1450 keV. Each reaction involved the use of hydrogen projectiles and LiF solid targets as well as Li projectiles and hydrogen molecular gas targets. In all cases the effects of electron screening on the low-energy fusion cross sections (exponential enhancement) have been observed; the effects are somewhat stronger in the case of atomicp ord projectiles compared to the case of molecularH 2 orD 2 gas targets. If isotopic effects on electron screening are negligible, all three reactions should exhibit the same enhancements for each set of experimental techniques. The measurements confirmed this expectation to a large extent.
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Supported in part by the Landesamt Nordrhein-Westfalen (IVA5-10600387), the Deutsche Forschungsgemeinschaft (Ro429/ 18-2 and Ro429/21-1), and the Comision Interministerial de Ciencia y Tecnologia (AEN90-0932)
The authors would like to thank H.W. Becker, G. Blüge, A. Krauss, and H.P. Trautvetter for many discussions, and H. Baumeister, K. Brand, H. Ebbing, A. Gottdang, B. Hippert, A. Mann, and H. Schulte for technical assistance. We are also grateful to M. Berheide, A. Gardberg, U. Giesen, C. Iliadis, N. Meyer, K. Neldner, G, Roters, T. Schange, S. Schmidt, S. Seuthe, A. Stefan, R. Timmermann, M. Topheide, K. Wolke, and S. Wüstenbecker for help during the course of the experiments. We also thank C.A. Barnes and J.F. Harmon for fruitful discussions and R.W. Kavanagh for comments on the manuscript.
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Engstler, S., Raimann, G., Angulo, C. et al. Isotopic dependence of electron screening in fusion reactions. Z. Physik A - Hadrons and Nuclei 342, 471–482 (1992). https://doi.org/10.1007/BF01294958
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DOI: https://doi.org/10.1007/BF01294958