Speaker
Description
The need for elemental analysis of helium has recently increased dramatically due to the introduction of several novel applications of He implantation, e.g. in materials of future fusion reactors [1] and in optical waveguides [2, 3]. Proton elastic backscattering spectrometry (p-EBS) is a basic method for depth profiling of helium [4, 5]. Ion beam analysis methods strongly rely on the available cross-section data, and the accuracy of IBA methods cannot exceed that of the available cross-sections. Consequently, precise cross-section curves are required in order to obtain reliable results with IBA. A large number of excitation functions for nuclear reactions relevant to IBA have been measured and are compiled in IBANDL at www.nds.iaea.org/ibandl/. This database reveals a lack of data for the 3He(p,p)3He cross section. Only one serie of data appears at one angle (159.2°) in a limited range of energies (1520-2860 keV).
In this work we have measured the elastic scattering cross section using novel solid Si-3He targets developed by the NanoMatMicro group from the Institute of Materials Science. [7]. With these data we have propose completed the resonance of the elastic cross section in a range of energy from 800 to 4500 keV at different angles (159, 165 and 150°) and we have compared with the scarce data in the literature.
[1] F. Paszti, Nucl. Instr. and Meth. B 66 (1992) 83.
[2] Y. Avrahami, E. Zolotoyabko, Nucl. Instr. and Meth. B 120 (1996) 84.
[3] P. Bindner, A. Boudrioua, J.C. Loulergue, P. Moretti, Nucl. Instr. and Meth. B 120 (1996) 88.
[4] J.S. Blewer, Ion Beam Surface Layer Analysis, Plenum, New York, 1976. p. 185.
[5] F.J. Ferrer, M. Alcaire, J. Caballero-Hernández, F.J. Garcia-Garcia, J. Gil-Rostra, A. Terriza, V. Godinho, J. García-López, A. Barranco, A. Fernández-Camacho, Nucl. Instr. and Meth. B 332 (2014) 449–453
[6] Langley, R.A. (1976) in Proc. Int. Conf. on Radiation Effect and Tritium Technology for Fusion Reactors, vol IV, (J.S. Walson and F.W. Wiffen, eds.), p.158. Conf. 750989, US Dept. of Commerce, Springfield, VA, USA
[7] Asunción Fernández, Dirk Hufschmidt, Julien L. Colaux, Jose Javier Valiente-Dobón, Vanda Godinho, Maria C. Jiménez de Haro, David Feria, Andrés Gadea, Stéphane Lucas, Low gas consumption fabrication of 3He solid targets for nuclear reactions, Materials & Design, 186 (2020) 108337 (1-10)
