Abstract: A neutron detector having high sensitivity of detection for low energy neutrons is provided. The neutron detector 10 includes a detecting element including a Si semiconductor layer 2, a first electrode 1 formed on one main surface of the Si semiconductor layer 2 and a second electrode 4 formed on the other main surface of the Si semiconductor layer 2, in which the Si semiconductor layer 2 includes a P-type impurity region 2a in contact with the second electrode 4 and an N-type impurity region 2b in contact with the first electrode 1; and a radiator 8 arranged to face the first electrode 1. In addition, a personal dosemeter and a neutron fluence monitor including the same are provided.

Abstract: A microstrip antenna has a rectangularly-shaped radiation conductive plate attached to one side of a dielectric plate, with a grounding conductive plate being attached to the other side of the dielectric plate. Rectangular line loads extend from adjacent sides of the radiation conductive plate. With such a configuration, the antenna retains all of the advantages of a microstrip antenna, including light weight, compactness, ease of manufacture, and a low profile, while enabling operation at multiple frequencies (four, on one embodiment), or polarization at multiple frequencies (two, in another embodiment).