Neutron density gauge,inside a box with warning stickers on its sides. This equipment is used to detect the moisture content of a material,such as soil,by using radiation. It operates by using a source in the gauge that emits radioactive neutrons. These high energy particles collide with hydrogen atoms in the test material,and lose energy in the process. A detector inside the gauge only counts the number of low-energy neutrons that have resulted from the collisions. The wetter the material,the more neutrons collide with hydrogen atoms (as there are more hydrogen atoms in wet material),and more low-energy neutrons are detected | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Public Health England |
Bildgröße: | 3596 px × 2447 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |