TY - JOUR
T1 - A porous hexagonal boron nitride powder compact for the production and release of radioactive 11C
AU - Stegemann, Simon
AU - Ballof, J.
AU - Cocolios, Thomas Elias
AU - Gorreia, J.G.
AU - Dockx, Kristof
AU - Poleshchuk, O.
AU - Fernandes Pinto Ramos, João Pedro
AU - Schell, J.
AU - Stora, Thierry
AU - Vleugels, Jozef
N1 - Score=10
PY - 2021/7/1
Y1 - 2021/7/1
N2 - A porous pre-sintered hexagonal boron nitride powder compact was recently developed as target for the production of intense 11C beams for Positron Emission Tomography-aided hadron therapy. In a previous study, this target has been characterized regarding its operational limitations. In this work, microstructural characterization with respect to the target's grain size, porosity and pore structure, and a dedicated fractional release study from activated targets, i.e. how much 11C is extracted by a short heat treatment, is presented. Corresponding results include an average grain size of approximately 1.7(1) μm , total and open porosity of 40(5) and 21(7)%, respectively, which is mostly composed of pores with sizes ranging from 120 to 470 nm. From the measured release fraction the order of magnitude of carbon's diffusion coefficient D(1500°C) = 1E-15 to 1E-14 cm2/s in porous boron nitride, and a 11C extraction efficiency of about 10% at 1500°C target temperature were estimated.
AB - A porous pre-sintered hexagonal boron nitride powder compact was recently developed as target for the production of intense 11C beams for Positron Emission Tomography-aided hadron therapy. In a previous study, this target has been characterized regarding its operational limitations. In this work, microstructural characterization with respect to the target's grain size, porosity and pore structure, and a dedicated fractional release study from activated targets, i.e. how much 11C is extracted by a short heat treatment, is presented. Corresponding results include an average grain size of approximately 1.7(1) μm , total and open porosity of 40(5) and 21(7)%, respectively, which is mostly composed of pores with sizes ranging from 120 to 470 nm. From the measured release fraction the order of magnitude of carbon's diffusion coefficient D(1500°C) = 1E-15 to 1E-14 cm2/s in porous boron nitride, and a 11C extraction efficiency of about 10% at 1500°C target temperature were estimated.
KW - Radioactive ion beam production
KW - C release
KW - Boron nitride target
KW - Release fractions
KW - Release efficiency
UR - https://ecm.sckcen.be/OTCS/llisapi.dll/open/42121953
U2 - 10.1016/j.jeurceramsoc.2020.12.029
DO - 10.1016/j.jeurceramsoc.2020.12.029
M3 - Article
SN - 0955-2219
VL - 41
SP - 4086
EP - 4097
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 7
ER -