Abstract
When viewed in a rotating frame of reference, a transverse-plane radiofrequency (RF) field manifests as a longitudinal field component called the fictitious field. By modulating the RF field and thus the fictitious field, detectable longitudinal magnetization patterns have previously been shown to be measurable. By combining fictitious-field modulation and longitudinal detection, here we demonstrate EPR spectroscopy and one-dimensional imaging in a custom-built longitudinal detection system operating at an ultra-low frequency (24 MHz) for detecting electron spins with short (~nanoseconds) relaxation times. Simultaneous transmit and receive with low transmitter leakage level (~80 dB isolation) is also demonstrated.
Original language | English (US) |
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Article number | 106855 |
Journal | Journal of Magnetic Resonance |
Volume | 321 |
DOIs | |
State | Published - Dec 2020 |
Bibliographical note
Publisher Copyright:© 2020 Elsevier Inc.
Keywords
- Electron paramagnetic resonance
- Fictitious field
- Iron-oxide nanoparticles
- Longitudinal detection
- Simultaneous transmit and receive
- Spectroscopy