Abstract
In recent experiments at least two structures have been detected in positron spectra from subcritical (total chargeZ ≦ 174) heavy-ion collisions at bombarding energiesE Lab=5.7−5.9 MeV/n. The origin of these structures is unexplained up to now. Atomic effects have already been discussed as a possible source in a previous paper, where a schematic ansatz for the electronic transition matrix elements was employed. Meanwhile numerical calculations forK-vacancy formation also exhibited oscillations in the impact parameter dependence when using this ansatz. In this paper we report on a scaling law describing these oscillations. As a consequence certain subsidiary conditions have to be imposed on our schematic ansatz, which in turn yield a new understanding on eligible atomic sources for multiple structures in the emission spectra of positrons.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Backe, H., Handschug, L., Hessberger, F., Kankeleit, E., Richter, L., Weik, F., Willwater, R., Bokemeyer, H., Vincent, P., Nakayama, Y., Greenberg, J.S.: Phys. Rev. Lett.40, 1443 (1978)
Kozhuharov, C., Kienle, P., Berdermann, E., Bokemeyer, H., Greenberg, J.S., Nakayama, Y., Vincent, P., Backe, H., Handschug, L., Kankeleit, E.: Phys. Rev. Lett.42, 376 (1979)
Backe, H., Senger, P., Bonin, W., Kankeleit, E., Krämer, M., Krieg, R., Metag, V., Trautmann, N., Wilhelmy, J.B.: Phys. Rev. Lett.50, 1838 (1983)
Clemente, M., Berdermann, E., Kienle, P., Tsertos, H., Wagner, W., Kozhuharov, C., Bosch, F., Koenig, W.: Phys. Lett.137 B, 41 (1984)
Schweppe, J., Gruppe, A., Bethge, K., Bokemeyer, H., Cowan, T., Folger, H., Greenberg, J.S., Grein, H., Ito, S., Schule, R., Schwalm, D., Stiebing, K.E., Trautmann, N., Vincent, P., Waldschmidt, M.: Phys. Rev. Lett.51, 2261 (1983)
Kienle, P.: J. Phys. Soc. Jpn.54 [Suppl. II], 549 (1985)
Cowan, T., Backe, H., Begemann, M., Bethge, K., Bokemeyer, H., Folger, H., Greenberg, J.S., Grein, H., Gruppe, A., Kido, Y., Klüver, M., Schwalm, D., Schweppe, J., Stiebing, K.E., Trautmann, N., Vincent, P.: Phys. Rev. Lett.54, 1761 (1985)
Cowan, T., Backe, H., Bethge, K., Bokemeyer, H., Folger, H., Greenberg, J.S., Sakaguchi, K., Schwalm, D., Schweppe, J., Stiebing, K.E., Vincent, P.: Phys. Rev. Lett.56, 444 (1986)
Tsertos, H., Berdermann, E., Bosch, F., Clemente, M., Kienle, P., Koenig, W., Kozhuharov, C., Wagner, W.: Phys. Lett.162 B, 273 (1985)
Krieg, R., Bozek, E., Gollerthan, U., Kankeleit, E., Klotz-Engmann, G., Krämer, M., Meyer, U., Oeschler, H., Senger, P.: Phys. Rev. C34, 562 (1986)
Tsertos, H., Bosch, F., Kienle, P., Koenig, W., Kozhuharov, C., Berdermann, E., Huchler, S., Wagner, W.: Z. Phys. A — Atomic Nuclei326, 235 (1987)
Koenig, W., Bosch, F., Kienle, P., Kozhuharov, C., Tsertos, H., Berdermann, E., Huchler, S., Wagner, W.: Z. Phys. A — Atomic Nuclei328, 129 (1987)
Kienle, P.: Anomalous positron emission in heavy ion collisions. In: Atomic physics 10. Narumi, H., Shimamura, I. (eds.), p. 105. Amsterdam: North-Holland 1987
Bokemeyer, H.: In: Physics of strong fields. Greiner, W. (ed.), p. 195. NATO ASI series B 153. New York: Plenum Press 1987
Cowan, T.E., Greenberg, J.S.: In: Physics of strong fields. Greiner, W. (ed.), p. 111. NATO ASI series B 153. New York: Plenum Press 1987
Berdermann, E., Bosch, F., Clemente, M., Franosch, M., Huchler, S., Kemmer, J., Kienle, P., Koenig, W., Kozhuharov, C., Tsertos, H., Wagner, W.: In: Physics of strong fields. Greiner, W. (ed.), p. 281. NATO ASI series B 153. New York: Plenum Press 1987
Reinhardt, J., Müller, B., Greiner, W.: Phys. Rev. A24, 103 (1981)
Reinhardt, J., Müller, U., Müller, B., Greiner, W.: Z. Phys. A — Atomic Nuclei303, 173 (1981)
Müller, U., Soff, G., Reus, T. de, Reinhardt, J., Müller, B., Greiner, W.: Z. Phys. A — Atomic Nuclei313, 263 (1983)
Müller, U., Soff, G., Reinhardt, J., de Reus, T., Müller, B., Greiner, W.: Phys. Rev. C30, 1199 (1984)
Reus, T. de, Reinhardt, J., Müller, B., Greiner, W., Soff, G., Müller, U.: J. Phys. B17, 615 (1984)
Müller, U., Reus, T. de, Reinhardt, J., Müller, B., Greiner, W.: Z. Phys. A — Atomic Nuclei323, 261 (1986)
Reus, T. de, Reinhardt, J., Müller, U., Müller, B., Greiner, W., Soff, G.: Physica C144, 237 (1987)
Reus, T. de: Innerschalenanregung in Schwerionenstößen bis zu mittleren Einschußenergien. Report GSI-87-8
Reus, T. de, Soff, G., Graf, O., Greiner, W.: J. Phys. G12, L303 (1986)
Lichten, W., Robatino, A.: Phys. Rev. Lett.54, 781 (1985)
Reinhardt, J., Müller, B., Greiner, W.: Phys. Rev. Lett.55, 134 (1985)
Lichten, W., Robatino, A.: Phys. Rev. Lett.55, 135 (1985)
Reus, T. de, Müller, U., Müller, B., Greiner, W.: GSI Scientific Report GSI-82-1, 174 (1981)
Liesen, D., Armbruster, P., Behncke, H.H., Bosch, F., Hagmann, S., Mokler, P.H., Schmidt-Böcking, H., Schuch, R.: In: Electronic and atomic collisions. Oda, N., Takayanagi, K. (eds.), p. 337. Amsterdam: North Holland 1980
Liesen, D.: Comm. At. Mol. Phys.12, 39 (1982)
Mokler, P.H., Liesen, D.: In: Progress in atomic spectroscopy, Part C. Beyer, H.J., Kleinpoppen, H. (eds.), p. 321. New York: Plenum Press 1983
Herath-Banda, M.A., Ramayya, A.V., Maguire, C.F., Güttner, F., Koenig, W., Martin, B., Povh, B., Skapa, H., Soltani, J.: Phys. Rev. A29, 2429 (1984)
Herath-Banda, M.A., Ramayya, A.V., Koenig, W., Martin, B., Skapa, H., Soltani, J.: Phys. Rev. Lett.53, 1646 (1984)
Molitoris, J.D., Anholt, R., Meyerhof, W.E., Baker, O.K., Andiamonje, S., Morenzoni, E.: Z. Phys. A — Atomic Nuclei323, 129 (1986)
Lu, C.C., Carlson, T.A., Malik, F.B., Tucker, T.C., Nestor, C.W., Jr.: Atomic Data3, 1 (1971)
Scharf, G., Twerenbold, D.: Phys. Lett. B198, 389 (1987)
Rumrich, K., Greiner, W., Soff, G.: Phys. Lett. A125, 394 (1987)
Soff, G., Reinhardt, J.: (to be published)
Reinhardt, J., Geiger, K., Grabiak, M., Ionescu, D.C., Scherdin, A., Schramm, S., Müller, B., Greiner, W., Soff, G.: Positron lines in heavy ion collisions: recent theoretical developments. Proceedings of the 6th Adratic International Conference on Nuclear Physics, Frontiers of Heavy-Ion Physics, Dubrovnik, Cindro, N., Greiner, W., Caplar, R. (eds.), p. 409. Singapore: World Scientific 1987
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
de Reus, T., Müller-Nchler, U., Soff, G. et al. Can multiple structures in positron spectra be caused by atomic effects?. Z Phys D - Atoms, Molecules and Clusters 8, 305–313 (1988). https://doi.org/10.1007/BF01437096
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01437096