1. Schr�der, U., Becker, H.W., Bogaert, G., G�rres, J., Rolfs, C., Trautvetter, H.P., Azuma, R.E., Campbell, C., King, J.D., Vise, J.: Nucl. Phys. A (to be published)
2. Becker, H.W., Buchmann, L., G�rres, J., Kettner, K.U., Kr�winkel, H., Rolfs, C., Schmalbrock, P., Trautvetter, H.P., Vlieks, A.: Nucl. Instrum Methods198, 277 (1982)
3. Ajzenberg-Selove, F.: Nucl. Phys. A360, 1 (1981), A449, 1 (1986)
4. Rolfs, C.: Nucl. Phys. A217, 29 (1973)
5. Philpott, R.J., Halderson, D.: Nucl. Phys. A375, 169 (1982)