The electronscreening in the 7Li(p,α)α reaction has been studied at Ep=30 to 100 keV for differentenvironments: Li2WO4 insulator, Li metal, and PdLi alloys. For the insulator a screening potential energy of Ue=185±150 eV was observed, consistent with previous work and the atomic adiabatic limit. However, for the Li metal and the PdLi alloys we find large values of Ue=1280±60 and 3790±330 eV, respectively: the values can be explained by the plasma model of Debye applied to the quasi-free metallic electrons in these samples. Similar results have been found for the 6Li3(p,α)He reaction supporting the hypothesis of the isotopic independence of the electronscreening effect. The data together with previous studies of d(d,p)t and 9Be6(p,α)Li in metals verify the Debye model scaling Ue∝Zt (charge number of target).

Electron screening in 7Li(p,α)α and 6Li(p,α)3He for different environments / J., Cruz; Z., Flp; G., Gyrky; F., Raiola; DI LEVA, Antonino; B., Limata; M., Fonseca; H., Luis; D., Schrmann; M., Aliotta; H. W., Becker; A. P., Jesus; K. U., Kettner; J. P., Ribeiro; C., Rolfs; Romano, Mario; E., Somorjai; F., Strieder. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 624:(2005), pp. 181-185. [10.1016/j.physletb.2005.08.036,]

Electron screening in 7Li(p,α)α and 6Li(p,α)3He for different environments

DI LEVA, ANTONINO;ROMANO, MARIO;
2005

Abstract

The electronscreening in the 7Li(p,α)α reaction has been studied at Ep=30 to 100 keV for differentenvironments: Li2WO4 insulator, Li metal, and PdLi alloys. For the insulator a screening potential energy of Ue=185±150 eV was observed, consistent with previous work and the atomic adiabatic limit. However, for the Li metal and the PdLi alloys we find large values of Ue=1280±60 and 3790±330 eV, respectively: the values can be explained by the plasma model of Debye applied to the quasi-free metallic electrons in these samples. Similar results have been found for the 6Li3(p,α)He reaction supporting the hypothesis of the isotopic independence of the electronscreening effect. The data together with previous studies of d(d,p)t and 9Be6(p,α)Li in metals verify the Debye model scaling Ue∝Zt (charge number of target).
2005
Electron screening in 7Li(p,α)α and 6Li(p,α)3He for different environments / J., Cruz; Z., Flp; G., Gyrky; F., Raiola; DI LEVA, Antonino; B., Limata; M., Fonseca; H., Luis; D., Schrmann; M., Aliotta; H. W., Becker; A. P., Jesus; K. U., Kettner; J. P., Ribeiro; C., Rolfs; Romano, Mario; E., Somorjai; F., Strieder. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 624:(2005), pp. 181-185. [10.1016/j.physletb.2005.08.036,]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/109980
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