| Zdroj: |
Bennett, J R J, Bergmann, U C, Drumm, P V, Lettry, J, Nilsson, T, Catherall, R, Jonsson, O C, Ravn, H L & Simon, H 2002, ' Release studies of a thin foil tantalum target for the production of short-lived radioactive nuclei ' Nuclear Physics A: Nuclear and Hadronic Physics, vol. 701, pp. 327C-333C . |
| Popis: |
Measurements have been made at ISOLDE, of the release curves and yields of radioactive beams of lithium, sodium and beryllium from a target constructed from 2 pm thick foils. The release curves have been analysed by fitting to a mathematical model to determine the coefficients of diffusion of the particles in the foils and effusion through the target and ionizer at several temperatures. Through a better understanding of the rate of transport of the particles, it is possible to design targets and ionizers with improved yields. This is most important for the rare, short-lived isotopes in which there is considerable interest for physics experiments. This target has demonstrated large increases in the yields of Li-11 and Be-12, in agreement with the predictions of the model. (C) 2002 Elsevier Science B.V. All rights reserved. |
