Recent results at the SIRa test bench: Diffusion properties of carbon graphite and B 4C targets

• Published in: Nuclear physics. A Vol. 701; no. 1; pp. 491 - 494
• Main Authors: Landré-Pellemoine, F., Angelique, J.C., Bajeat, O., Barué, C., Bennett, R., Clapier, F., Ducourtieux, M., Gaubert, G., Gibouin, S., Huguet, Y., Jardin, P., Kandri-Rody, S., Lau, C., Lecesne, N., Leroy, R., Lewitowicz, M., Lichtenthäler, R., Marry, C., Maunoury, L., Obert, J., Orr, N.A., Pacquet, J.Y., Saint-Laurent, M.G., Stodel, C., Rataud, J.P., Villari, A.C.C.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2002
• ISSN: 0375-9474
• DOI: 10.1016/S0375-9474(01)01633-5

The diffusion properties of graphite targets with 1, 4 and 15 microns microstructure has been measured for He and Ar isotopes. An important enhancement of the diffusion efficiency for the smaller microstructure is observed. A releasing efficiency of the order of 100% was obtained for 6He ( T 1/2=806 ms) at a temperature of 1600 K. The diffusion and production properties of He isotopes in a target of B 4C (boron carbide) have also been studied. Yields of 1.4×10 8 pps and 5.0×10 5 pps for 6He and 8He has been obtained.