Neutron microtomography of voids in gold

Abstract

Graphical abstract

Sample container for high-resolution neutron imaging of spent nuclear fuel cladding sections

“…The hydrogen distribution in zirconium based materials is usually investigated using unirradiated samples, and reports on neutron radiography of radioactive, irradiated samples are scarce [4,5]. Recently, the spatial resolution of neutron imaging was improved down to the sub-5 micrometer domain in 2D [6] and about 10 micrometers in 3D [7] in the framework of a Neutron Microscope (NM) project [8][9][10]. Because such resolution is compatible with the size of common hydride packets, the advanced high-resolution neutron imaging detector provides an excellent nondestructive tool for the quantification of hydrogen in nuclear fuel claddings.…”

Light Yield Enhancement of 157-Gadolinium Oxysulfide Scintillator Screens for the High-Resolution Neutron Imaging

“…6 LiF + ZnS:Ag) spread over a substrate with no further modifications. Work presented here is a part of the ‘Neutron Microscope project’ [[2], [3], [4]] performed at the Paul Scherrer Institut (PSI) and is focused on the spatial resolution enhancement through material and geometrical adjustments of the scintillator screen.…”

High-Resolution Thermal Neutron Imaging With ¹⁰Boron/CsI:Tl Scintillator Screen

“…Using the same imaging detector equipped with the described scintillator screen, neutron microtomography was demonstrated by imaging a gold cup containing two 500 µm gold spheres [13]. The specimen was placed on a rotational stage and imaged at 0.53° increments, producing a complete dataset of 674 projected radiographs.…”