Strongly enhanced Li + D reaction in Pd observed in deuteron bombardment on PdLix with energies between 30 and 75 keV

Thick target yields of α particles emitted in the 6,7Li(d,α)4,5He reactions in PdLix and AuLix were measured as a function of the bombarding energy between 30 and 75 keV. It was found that the reaction rate in Pd at lower energies is enhanced strongly over the one predicted by the cross section for...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2004-03, Vol.73 (3), p.608-612
Main Authors: KASAGI, Jirohta, YUKI, Hideyuki, BABA, Taiji, NODA, Takashi, TAGUCHI, Junji, SHIMOKAWA, Masayoshi, GALSTER, Wilfried
Format: Article
Language:English
Subjects:
Exact sciences and technology
Physics
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Summary:Thick target yields of α particles emitted in the 6,7Li(d,α)4,5He reactions in PdLix and AuLix were measured as a function of the bombarding energy between 30 and 75 keV. It was found that the reaction rate in Pd at lower energies is enhanced strongly over the one predicted by the cross section for the reaction with bare nuclei, but no enhancement is observed in Au. A screening energy is introduced to reproduce the excitation function of the thick target yield for each metal. The deduced value for Pd amounts to 1500±310 eV, whereas it is only 60±150 eV for Au. The enhancement in the Pd case cannot be explained by electron screening alone but suggests the existence of an additional and important mechanism of screening in metal.
ISSN:0031-9015
1347-4073
DOI:10.1143/JPSJ.73.608