The electron screening in the d(d,p)t reaction has been studied for the deuterated metal Pt at a target temperature T = 20 ±C to 340 ±C, and for Co at T = 20 ±C and 200 ±C. The enhanced electron screening decreases with increasing temperature, where the data agree with the plasma model of Debye applied to the quasi-free metallic electrons. The data represent the ¯rst observation of a temperature dependence of a nuclear cross-section. We also measured the screening e®ect for the deuterated metal Ti (an element of group 4 of the periodic table) at T = ¡10 ±C to 200 ±C: above 50 ±C the hydrogen solubility dropped to values far below unity and a large screening e®ect became observable. Similarly, all metals of groups 3 and 4 and the lanthanides showed a solubility of a few percent at T = 200 ±C (compared to T = 20 ±C) and a large screening became also observable. Within the Debye model the deduced number of valence electrons per metallic atom agrees with the corresponding number from the Hall coe±cient, for all metals investigated.
Enhanced d(d,p)t fusion reaction in metals / F., R., B., B., Fülöp, Z.s., Gyürky, G.y., S., Z., J., C., DI LEVA, A., Limata, B.N., M., F., H., L., M., A., H. W., B., C., B., A., D., L., G., Imbriani, G., A. P., J., M., J., J. P., R., Roca, V., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. A, HADRONS AND NUCLEI. - ISSN 1434-6001. - STAMPA. - 27:(2006), pp. 79-82. [10.1140/epja/i2006-08-011-0]
Enhanced d(d,p)t fusion reaction in metals
DI LEVA, ANTONINO;LIMATA, BENEDICTA NORMANNA;IMBRIANI, GIANLUCA;ROCA, VINCENZO;ROMANO, MARIO;
2006
Abstract
The electron screening in the d(d,p)t reaction has been studied for the deuterated metal Pt at a target temperature T = 20 ±C to 340 ±C, and for Co at T = 20 ±C and 200 ±C. The enhanced electron screening decreases with increasing temperature, where the data agree with the plasma model of Debye applied to the quasi-free metallic electrons. The data represent the ¯rst observation of a temperature dependence of a nuclear cross-section. We also measured the screening e®ect for the deuterated metal Ti (an element of group 4 of the periodic table) at T = ¡10 ±C to 200 ±C: above 50 ±C the hydrogen solubility dropped to values far below unity and a large screening e®ect became observable. Similarly, all metals of groups 3 and 4 and the lanthanides showed a solubility of a few percent at T = 200 ±C (compared to T = 20 ±C) and a large screening became also observable. Within the Debye model the deduced number of valence electrons per metallic atom agrees with the corresponding number from the Hall coe±cient, for all metals investigated.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
