- Signal Amplification By Reversible Exchange (SABRE) creates "hyperpolarization" (large spin magnetization) using a transition metal catalyst and parahydrogen, addressing the sensitivity limitations of magnetic resonance. SABRE and its heteronuclear variant X-SABRE are simple, fast and general, but to date have not produced polarization levels as large as more established methods. We show here that inaccuracies in the theoretical framework for these applications, which focuses on avoided crossings (also called level anti-crossings or LACs) steer current SABRE and X-SABRE experiments away from optimal solutions. Accurate simulations show astonishingly rich and unexpected dynamics in SABRE/X-SABRE, which we explain with a combination of perturbation theory and average Hamiltonian approaches. ... [Read More]
- Publication Date
- October 20, 2021
- ARK
- ark:/87924/r4p84ct1b
- Publisher
- Format
- Contact
- Warren S Warren; (919) 660-1604, warren.warren@duke.edu
- Title
- pyr Bd sweep
- Repository
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