http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Proton-in-Water NMR Prototype for Polarized 129Xe Signal Calibration
J. A. TAN,V. KAVTANYUK,선용근,김우영 한국물리학회 2014 새물리 Vol.64 No.2
We present a set-up for detecting the proton-in-water nuclear magnetic resonance (NMR) signal as a prototype for calibrating the signal from ^129Xe polarized via the spin-exchange optical pumping (SEOP) technique. When magnetic field oscillating at the resonance frequency is applied perpendicularly to the static magnetic field in which nuclei of particular spin are immersed, NMR takes place: the nuclear spin gets flipped while precessing around the direction of the static field. Our NMR set-up has three perpendicular coils: the largest coil, which provides the static or holding field, the RF coil which induces an oscillating or driving magnetic field, and the pick-up coil, in which a current is induced by the precessing spins. The RF and the pick-up coils are parts of the LC circuits designed to allow field strength optimization and Q-factor manipulations. The driving and the pick-up signals are managed using Tecmag Apollo LF-1 Single Receiver NMR System console. Comparisons of the Fourier transforms of the signals acquired with and without the water sample show the relative magnitude of the proton-in-water NMR signal.
김우영,A. Gladkov,V. Kavtanyuk,선용근,C. C. Yun,J. W. Kim 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.3
Polarized rare isotope (RI) beams have been designed at the Rare Isotope Science Project (RISP)for the study of the nuclear-structure, nuclear-reaction and astrophysics experiments. A powerfulmethod has been adopted for this work − the production of polarized RI beams via projectilefragmentation. The in-flight system line was designed for this purpose at the RISP by using theprojectile fragmentation method. The working principle, schematic design and experiments to beperformed at the RISP will be presented.