Robust conversion of singlet spin order in coupled spin-1/2 pairs by adiabatically ramped RF-fields

Robust conversion of singlet spin order in coupled spin-1/2 pairs by adiabatically ramped RF-fields Научная публикация

Журнал

Journal of Magnetic Resonance
ISSN: 1090-7807

Вых. Данные

Год: 2016, Том: 273, Страницы: 56-64 Страниц : 9 DOI: 10.1016/j.jmr.2016.10.003

Ключевые слова

Spin relaxation, Long-lived states, Spin pairs, Adiabatic transitions

Авторы

Pravdivtsev Andrey N. ^1,2 , Kiryutin Alexey S. ^1,2 , Yurkovskaya Alexandra V. ^1,2 , Vieth Hans-Martin ^1,3 , Ivanov Konstantin L. ^1,2

Организации

1	International Tomography Center, Siberian Branch of the Russian Academy of Science, Institutskaya 3A, Novosibirsk 630090, Russia
2	Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russia
3	Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, Berlin 14195, Germany

We propose a robust and highly efficient NMR technique to create singlet spin order from longitudinal spin magnetization in coupled spin-½ pairs and to perform backward conversion (singlet order) → magnetization. In this method we exploit adiabatic ramping of an RF-field in order to drive transitions between the singlet state and the T ± triplet states of a spin pair under study. We demonstrate that the method works perfectly for both strongly and weakly coupled spin pairs, providing a conversion efficiency between the singlet spin order and magnetization, which is equal to the theoretical maximum. We anticipate that the proposed technique is useful for generating long-lived singlet order, for preserving spin hyperpolarization and for analyzing singlet spin order in nearly equivalent spin pairs in specially designed molecules and in low-field NMR studies.

Pravdivtsev A.N. , Kiryutin A.S. , Yurkovskaya A.V. , Vieth H-M. , Ivanov K.L.
Robust conversion of singlet spin order in coupled spin-1/2 pairs by adiabatically ramped RF-fields
Journal of Magnetic Resonance. 2016. V.273. P.56-64. DOI: 10.1016/j.jmr.2016.10.003

Поступила в редакцию:	13 авг. 2016 г.
Принята к публикации:	5 окт. 2016 г.
Опубликована online:	6 окт. 2016 г.

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