Radiographic and Tomographic Inspection of Wooden Specimens with Fission Neutrons
Wood is one of the eldest crafting and building materials as proven by remnants in many archaeological excavations. Particularly in subjects of cultural heritage radiographic technologies are the appropriate non-destructive methods to gain insight without dissembling or even touching the specimen. X-rays or gamma radiation may be the appropriate tools, except in cases of any metal shielding or encapsulation that makes any wooden structure inaccessible to X-ray inspection. This problem has been resolved by applying neutrons for radiography and tomography. Since neutrons are prone to scattering, they need a certain minimum velocity passing straight through the sample volume. A beam-line complying with these requirements is available in the form of fission neutrons at the nuclear research reactor of the Technische Universita(a)t München in Garching/Munich (FRM II, NECTAR). The example of a wooden specimen partly shielded with a thick metal plate shows no impairment in visualising the detailed structures by the shielding in the reconstructed images of a neutron tomography.
NDT of wood water and resin distribution metal shielding neutron radiography of voluminous specimens of high hydrogen content
Kurt OSTERLOH Christoph RAEDEL Uwe ZSCHERPEL Dietmar MEINEL Uwe EWERT Thomas BUECHERL Andreas HASENSTAB
Institute for Materials Research and Testing (BAM), Berlin, Germany; RCM, Technische Universit(a)t München, Garching, Germany; LGA Bautechnik GmbH, Nürnberg, Germany;
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
301-306
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）