TY - JOUR
T1 - Longitudinal relaxation time detection using a high-Tc superconductive quantum interference device magnetometer
AU - Liao, Shu Hsien
AU - Horng, Herng Er
AU - Yang, Hong Chang
AU - Yang, Shieh Yueh
PY - 2007
Y1 - 2007
N2 - The parameters to optimize the measurement of longitudinal relaxation time detection using a high- Tc superconductive quantum interference device magnetometer are investigated. These parameters include the prepolarization field, Bp, the prepolarization time, TBp, and the delay time, Td, to turn on pulses after turning off the prepolarization field. Furthermore, the decreasing of magnetization with the increasing Td of the applied pulse was analyzed to determine the longitudinal relaxation time. We estimated the longitudinal relaxation time to be 2.11±0.04 s and 2.29±0.04 s, respectively, for water determined from nuclear magnetic resonance signals as a function of TBp and Td at 24 °C in a measuring field of 95 μT. The data are consistent with the derived longitudinal relaxation time of water measured from the increase of magnetization with the duration of the polarizing field.
AB - The parameters to optimize the measurement of longitudinal relaxation time detection using a high- Tc superconductive quantum interference device magnetometer are investigated. These parameters include the prepolarization field, Bp, the prepolarization time, TBp, and the delay time, Td, to turn on pulses after turning off the prepolarization field. Furthermore, the decreasing of magnetization with the increasing Td of the applied pulse was analyzed to determine the longitudinal relaxation time. We estimated the longitudinal relaxation time to be 2.11±0.04 s and 2.29±0.04 s, respectively, for water determined from nuclear magnetic resonance signals as a function of TBp and Td at 24 °C in a measuring field of 95 μT. The data are consistent with the derived longitudinal relaxation time of water measured from the increase of magnetization with the duration of the polarizing field.
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U2 - 10.1063/1.2767193
DO - 10.1063/1.2767193
M3 - Article
AN - SCOPUS:34548020005
SN - 0021-8979
VL - 102
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 3
M1 - 033914
ER -