liquid helium
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2022 ◽  
Vol 148 ◽  
pp. 107653
Author(s):  
Martin Fibrich ◽  
Jan Šulc ◽  
Helena Jelínková


2022 ◽  
pp. 103141
Author(s):  
Raymond Kwesi Nutor ◽  
Tianding Xu ◽  
Xuelin Wang ◽  
Xiao-Dong Wang ◽  
Pengfei An ◽  
...  


2022 ◽  
Vol 34 (1) ◽  
pp. 012002
Author(s):  
Katharina Kolatzki ◽  
Marie Louise Schubert ◽  
Anatoli Ulmer ◽  
Thomas Möller ◽  
Daniela Rupp ◽  
...  
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2021 ◽  
Vol 104 (23) ◽  
Author(s):  
Bartłomiej Szafran
Keyword(s):  


2021 ◽  
Vol 92 (12) ◽  
pp. 123701
Author(s):  
K. Barr ◽  
T. Cookson ◽  
K. G. Lagoudakis


2021 ◽  
Vol 173 ◽  
pp. 112798
Author(s):  
Chuanjia Zhang ◽  
Qiyong Zhang ◽  
Zhigang Zhu ◽  
Damao Yao ◽  
Pengcheng Yang ◽  
...  


2021 ◽  
Vol 2 (2) ◽  
pp. 815-825
Author(s):  
Karel Kouřil ◽  
Michel Gramberg ◽  
Michael Jurkutat ◽  
Hana Kouřilová ◽  
Benno Meier

Abstract. In dissolution-dynamic nuclear polarization, a hyperpolarized solid is dissolved with a jet of hot solvent. The solution is then transferred to a secondary magnet, where spectra can be recorded with improved sensitivity. In bullet-dynamic nuclear polarization this order is reversed. Pressurized gas is used to rapidly transfer the hyperpolarized solid to the secondary magnet, and the hyperpolarized solid is dissolved only upon arrival. A potential advantage of this approach is that it may avoid excessive dilution and the associated signal loss, in particular for small sample quantities. Previously, we have shown that liquid-state NMR spectra with polarization levels of up to 30 % may be recorded within less than 1 s after the departure of the hyperpolarized solid from the polarizing magnet. The resolution of the recorded spectra however was limited. The system consumed significant amounts of liquid helium, and substantial manual work was required in between experiments to prepare for the next shot. Here, we present a new bullet-DNP (dynamic nuclear polarization) system that addresses these limitations.





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