Acoustic spectroscopy and electrical resistivity measurements have been employed to investigate the two relaxation processes occurring at liquid He temperature in very dilute Y–H and Sc–H alloys, and ascribed to H tunnelling systems near single or paired O traps. At very low H concentration, the peak due to the O–H tunnelling system becomes extremely narrow and is describable in terms of incoherent tunnelling with phonon assisted transitions.
Low temperature relaxations associated to quantum tunnelling of H in Sc and Y / Trequattrini, Francesco; Cannelli, G.; Cantelli, Rosario; Cordero, F.; Florencio, O.. - In: JOURNAL OF ALLOYS AND COMPOUNDS. - ISSN 0925-8388. - STAMPA. - 310:(2000), pp. 196-196. [10.1016/S0925-8388(00)00946-4]
Low temperature relaxations associated to quantum tunnelling of H in Sc and Y
TREQUATTRINI, Francesco;CANTELLI, Rosario;
2000
Abstract
Acoustic spectroscopy and electrical resistivity measurements have been employed to investigate the two relaxation processes occurring at liquid He temperature in very dilute Y–H and Sc–H alloys, and ascribed to H tunnelling systems near single or paired O traps. At very low H concentration, the peak due to the O–H tunnelling system becomes extremely narrow and is describable in terms of incoherent tunnelling with phonon assisted transitions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.