核磁共振的弛豫过程是高能态自旋核将多余的能量以电磁辐射形式发射出去而返回低能态的过程

A.自旋核能级裂分

B.自旋核由低能级向高能级的跃迁过程

C.自旋核由高能态返回低能态，多余能量以电磁辐射形式发射出去

D.高能态自旋核将多于能量以无辐射途径释放而返回低能态

A.自旋低能态的核数目等于高能态的核数目，核磁共振信号消失

B.纵向弛豫过程中，自旋体系的总能量降低

C.横向弛豫过程前后，核各能级的核的总数不变，体系总能量不变

D.纵向弛豫是高能级的核把能量传递给邻近低能级的核

A.光的吸收

B.光的发射

C.光的散射

D.光的衍射

A.不发生变化

B.逐渐变大

C.逐渐变小

D.先变大后变小

A.不变

B.逐渐减小

C.逐渐增大

D.不确定

A.中等能态跃迁到高能态 Transition from medium energy state to high energy state

B.高能态跃迁到低能态 Transition from high energy state to low energy state

C.中等能态跃迁到低能态 Transition from medium energy state to low energy state

D.低能态跃迁到高能态 Transition from low energy state to high energy state

E.低能态跃迁到中等能态 Transition from low energy state to medium energy state

A.1.51ev

B.1.89ev

C.1.95 ev

D.3.40ev