习题i
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1. 什么是核磁共振？要满足哪些条件才能观察到核磁共振现象？ 要观察到核磁共振现象需满足什么条件？ 2. 以下核中哪些核可观察到核磁信号 3．一核磁谱仪的磁场强度为 14.092 特斯拉，求下述核的工作频率： 1
H, 13C, 19F, 31P, 15N
γ 1
108radT-1S-1
H
13
C
19
F
2.675 0.673
31
P
2.517
15
N
1.083
-0.2712
4 对质子来说 (I=1/2)，当 T = 300°K，600MHz 谱仪 N β0 /N 0α = ?
5. 在外磁场下,忽略驰豫作用,磁化矢量的运动方程是
dM/dt＝
(M×B0)
(a)
写出磁化矢量三个分量的运动方程
(b)
写出旋转坐标系中的 Bloch 方程
H, 13C, 19F, 31P, 15N
γ 1
108radT-1S-1
H
13
C
19
F
2.675 0.673
31
P
2.517
15
N
1.083
-0.2712
4 对质子来说 (I=1/2)，当 T = 300°K，600MHz 谱仪 N β0 /N 0α = ?
5. 在外磁场下,忽略驰豫作用,磁化矢量的运动方程是
dM/dt＝
(M×B0)
(a)
写出磁化矢量三个分量的运动方程
(b)
写出旋转坐标系中的 Bloch 方程
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