Work address:
Home address:
Departmentof Experinental Physics
Hammarliden 1
Chalmers University of Technology
S- 412 62 Göteborg
and Göteborg University
Sweden
S- 412 96 Göteborg
Tel. +46 31 20 98 89
Sweden
Tel: +46 31 772 32 62
Fax: +46 31 772 32 69
e-mail. bjn@fy.chalmers.se