GALLEX solar neutrino results and status of GNO

✍ Scribed by T.A. Kirsten; W. Hampel; J. Handt; G. Heusser; J. Kiko; T. Kirsten; M. Laubenstein; E. Pernicka; W. Rau; U. Rönn; M. Wojcik; Y. Zakharov; R.v. Ammon; K.H. Ebert; T. Fritsch; D. Heidt; E. Henrich; L. Stieglitz; F. Weirich; M. Balata; M. Sann; F.X. Hartmann; E. Bellotti; C. Cattadori; O. Cremonesi; N. Ferrari; E. Fiorini; L. Zanotti; M. Altmann; F.v. Feilitzsch; R. Möβbauer; S. Wänninger; G. Berthomieu; E. Schatzman; I. Carmi; I. Dostrovsky; C. Bacci; P. Belli; R. Bernabei; S. d'Angelo; L. Paoluzi; M. Cribier; J. Rich; M. Spiro; C. Tao; D. Vignaud; J. Boger; R.L. Hahn; J.K. Rowley; R.W. Stoenner; J. Weneser; E. Bellotti; C. Cattadori; N. Ferrari; L. Zanotti; E. Burkert; W. Hampel; J. Handt; G. Heusser; J. Kiko; T. Kirsten; M. Laubenstein; W. Rau; H. Richter; M. Wojcik; Y. Zakharov; K.H. Ebert; E. Henrich; M. Balata; F.X. Hartman; M. Altmann; F.v. Feilitzsch; E. Schatzman; P. Belli; R. Bernabei; S. d'Angelo; M. Cribier

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 642 KB
• Volume: 77
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/s0920-5632(99)00389-8

✦ Synopsis

for the GALLEX" and GNO collaborations*

We describe the results of the GALLEX solar neutrino experiment after completion of the project. In particular, we summarize the results for GALLEX IV (12 solar runs) and for our 71As -spiking experiments. The integral GALLEX result for all 65 solar runs (GALLEX I-IV) is (78 + 8) SNU (lcy). This is only slightly more than half of the expected rate. The significance of this deficit is assured -directly by the results from our two S~Cr neutrino source experiments (at the 10% -level), and -indirectly by means of experiments in which 71Ge is generated within the target solution from beta-decaying 71As (at the percent level). GALLEX at Gran Sasso is now succeeded by GNO (Gallium Neutrino Observatory). The GNO status as of October 1998 is reported.