skip to main content

Title: Exploiting adiabatically switched RF-field for manipulating spin hyperpolarization induced by parahydrogen

A method for precise manipulation of non-thermal nuclear spin polarization by switching a RF-field is presented. The method harnesses adiabatic correlation of spin states in the rotating frame. A detailed theory behind the technique is outlined; examples of two-spin and three-spin systems prepared in a non-equilibrium state by Para-Hydrogen Induced Polarization (PHIP) are considered. We demonstrate that the method is suitable for converting the initial multiplet polarization of spins into net polarization: compensation of positive and negative lines in nuclear magnetic resonance spectra, which is detrimental when the spectral resolution is low, is avoided. Such a conversion is performed for real two-spin and three-spin systems polarized by means of PHIP. Potential applications of the presented technique are discussed for manipulating PHIP and its recent modification termed signal amplification by reversible exchange as well as for preparing and observing long-lived spin states.
Authors:
; ; ;  [1] ;  [2] ;  [1] ;  [3]
  1. International Tomography Center SB RAS, Institutskaya 3a, Novosibirsk 630090 (Russian Federation)
  2. (Russian Federation)
  3. (Germany)
Publication Date:
OSTI Identifier:
22493346
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 143; Journal Issue: 23; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AMPLIFICATION; CONVERSION; CORRELATIONS; EQUILIBRIUM; HYDROGEN; MODIFICATIONS; NMR SPECTRA; POLARIZATION; POTENTIALS; RESOLUTION; SPIN; SPIN ORIENTATION; SWITCHES