Detection apparatus and radiation detection system

A detection apparatus comprising:

• a conversion layer configured to convert incident light or radiation into a charge;
• a plurality of first electrodes configured to collect a charge produced as a result of the conversion by said conversion layer;
• and
• a plurality of first impurity semiconductor layers arranged between said plurality of first electrodes and said conversion layer,
• wherein said conversion layer is arranged over said plurality of first electrodes so as to cover said plurality of first electrodes, and
• a part of said conversion layer which covers a region between an adjacent pair of said first electrodes includes a portion smaller in film thickness than a part of said conversion layer which covers edges of said first electrodes.