SLOW POSITRON BEAM DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a positron beam device which has a beam strength equal to or more than that when tungsten is used as a moderator, can also generate a slow positron beam whose energy distribution is in a narrow range and allows an alternative to tungsten to be used as a moderator. SOLUTION: A crystallized nickel mesh is used as a moderator 2. It is preferable that the nickel mesh is composed of a nickel solid wire whose diameter is between 1μm and 100μm. It is more desirable that the nickel solid wire is made by narrowing its linear diameter through the etching with an acid liquid solution. COPYRIGHT: (C)2006,JPO&NCIPI