Affiliation: | (1) Dept. of Physics, University of Milano-Bicocca, Milan, Italy;(2) INFN, Milan, Italy;(3) Goddard Space Flight Center, NASA, Greenbelt, MA, USA;(4) ITC-irst, Trento, Italy;(5) INFN, Padova, Italy;(6) University of Wisconsin, Madison, WI, USA;(7) Present address: Institut Louis Néel, CNRS, Grenoble, France |