Two-pulse photon echo electron-nuclear double resonance of YAl O 3 : Pr 3 + </mml:…
1982; American Physical Society; Volume: 25; Issue: 11 Linguagem: Inglês
10.1103/physrevb.25.6578
ISSN1095-3795
AutoresR. M. Shelby, R. M. Macfarlane, R. L. Shoemaker,
Tópico(s)Advanced NMR Techniques and Applications
ResumoTwo-pulse photon echo electron-nuclear double resonance (or PENDOR) has been used to measure the second-order hyperfine splittings in the ground state and the lowest component of the excited $^{1}D_{2}$ state of YAl${\mathrm{O}}_{3}$:${\mathrm{Pr}}^{3+}$. The excited-state splittings are 0.923 and 1.565 MHz and are significantly different from previous hole-burning results because of greatly increased resolution. The mechanism for two-pulse PENDOR involves a modulation of the photon echo decay at the rf Rabi frequency. This modulation has been observed directly. A brief theoretical analysis is given which shows that the echo modulation is a result of phase and amplitude changes in the oscillating opitical dipole moment which are indirectly produced by the rf field.
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