PMR MEASUREMENTS ON (NI1-XCUX)(0.5)ZR-0.5-H-Y AMORPHOUS-ALLOYS

Spin-spin relaxation time (T-2) and complementary hydrogen content (H/ M), PMR spectrum width (FWHM) and spin lattice relaxation time (T-c) h ave been measured in (Ni1-xCux)(0.5)Zr-0.5-H-y ternary amorphous alloy s at 0 less than or equal to x less than or equal to 29 at.% concentra tions using Carr-Purcell-Meiboom-Gill (CPMG), solid-echo and saturatio n recovery pulse sequences respectively.The T-2 relaxation time measur ed by the slope of the CPMG echo train depends on both the hydrogen an d Cu content. The dependence can be attributed to the change of correl ation time and not to the change of activation energy or local field. The measurements were made in the 'motional narrowing' state; conseque ntly our E(a) and tau(infinity) quantities are averaged to the diffusi onal motion of protons taking part in this process. The extrapolated a mplitude of the echo train measured on the alloy-hydrogen system and n ormalized to the same quantity in water, gives the value of proton mag netization in thermal equilibrium, that is the hydrogen content free f rom any perturbing effects. The hydrogen content measured by CPMG echo train has turned out to be systematically smaller than that measured by weight increase.