| 摘要 |
A neutron detector technology based on <10>B thin film conversion of neutrons and detection of neutron capture reaction products in a counter gas within a thin straw tube detector body is described. This neutron scatter detector is based on gas-filled thin wall straw tubes, modified for the conversion of neutrons in a very thin coating, or layer, of <10>B, applied for example as a sputtered-coated film of <10>B4C, that lines the interior, or inside of the straw tube surface; and the subsequent detection of the neutron reaction products in the counter gas. One embodiment of this invention employs a closely-packed array of <10>B4C-vey thin layer lined straw tubes, hence removes the barrier to efficient neutron capture reaction product escape while still providing for efficient neutron capture by providing a plurality of very thin <10>B converters, each individual converter layer providing efficient reaction product escape. Using multiple stacks of such straw tube detectors, a reasonable stack depth allows a high neutron detection efficiency to be achieved on the 1-10 Å wavelength range of thermal neutrons. |
