Semiconductor detector, radiation detector and radiation detection apparatus

A semiconductor detector for detecting radiation, comprising:

• a first semiconductor part in which an electron and a hole are generated by incident radiation;
• a signal output electrode outputting a signal based on the electron or the hole;
• a gettering part gettering impurities in the first semiconductor part;
• and
• a second semiconductor part doped with a type of dopant impurities and having dopant impurity concentration higher than dopant impurity concentration of the first semiconductor part, wherein
• the second semiconductor part is in contact with the first semiconductor part,
• the gettering part is in contact with the second semiconductor part and not in contact with the first semiconductor part,
• one of the first semiconductor part and the second semiconductor part includes a constituent composed of n-type silicon and the other of the first semiconductor part and the second semiconductor part includes a constituent composed of p-type silicon, and
• the gettering part includes n-type polysilicon.