Eur. Phys. J. A 13, 377-382 (2002)

Enhanced electron screening in for deuterated Ta*

F. Raiola¹, P. Migliardi¹, G. Gyürky², M. Aliotta¹, A. Formicola¹, R. Bonetti³, C. Broggini⁴, L. Campajola⁵, P. Corvisiero⁶, H. Costantini⁶, J. Cruz⁷, A. D'Onofrio⁸, Z. Fülöp², G. Gervino⁹, L. Gialanella⁵, A. Guglielmetti³, G. Imbriani⁵, C. Gustavino¹⁰, A.P. Jesus⁷, M. Junker¹⁰, R.W. Kavanagh¹¹, P.G.P. Moroni⁶, A. Ordine⁵, J.V. Pinto⁷, P. Prati⁶, V. Roca⁵, J.P. Ribeiro⁷, D. Rogalla¹, C. Rolfs¹, M. Romano⁵, F. Schümann¹, D. Schürmann¹, E. Somorjai², F. Strieder¹, F. Terrasi⁸, H.P. Trautvetter¹ and S. Zavatarelli<sup>6

1</sup>  Institut für Physik mit Ionenstrahlen, Ruhr-Universität Bochum, Bochum, Germany
²  Atomki, Debrecen, Hungary
³  Dipartimento di Fisica, Università di Milano and INFN, Milano, Italy
⁴  INFN, Padova, Italy
⁵  Dipartimento di Scienze Fisiche, Università Federico II and INFN, Napoli, Italy
⁶  Dipartimento di Fisica, Università di Genova and INFN, Genova, Italy
⁷  Centro de Fìsica Nuclear, Universidade de Lisboa, Lisboa, Portugal
⁸  Dipartimento di Scienze Ambientali, Seconda Università di Napoli, Caserta and Napoli, Italy
⁹  Dipartimento di Fisica Sperimentale, Università di Torino and INFN, Torino, Italy
¹⁰  Laboratori Nazionali del Gran Sasso dell'INFN, Assergi, Italy
¹¹  California Institute of Technology, Pasadena, CA, USA

rolfs@ep3.ruhr-uni-bochum.de

(Received: 21 December 2001 Communicated by D. Schwalm)

Abstract
The recent observation of a large electron screening effect in the d(d, p)t reaction using a deuterated Ta target has been confirmed using somewhat different experimental approaches: for the electron screening potential energy. The high value arises from the environment of the deuterons in the Ta matrix, but a quantitative explanation is missing.

PACS
25.10.+s - Nuclear reactions involving few-nucleon systems.
25.45.-z - -induced reaction.
95.30.-k - Fundamental aspects of astrophysics.

© Società Italiana di Fisica, Springer-Verlag 2002