Without assuming any solar models and neutrino flavor conversions , ^ { 8 } B neutrinos seen by the Kamiokande experiment should contribute 2.6 \pm 0.45 SNU to the chlorine experiment .
When this rate is compared with the total event rate of 2.3 \pm 0.2 SNU observed by the Homestake experiment which should inlude a 0.2 SNU contribution from uncertainty-free pep neutrinos , there may still be a possible evidence that ^ { 7 } Be neutrinos are more severely suppressed than the ^ { 8 } B neutrinos with respect to the predictions of standard solar models , which can not be explained by any known astrophysics solution .
Given a Kamiokande event rate of larger than 36 \% ( 2 \sigma ) of the prediciton of Bahcall and Pinsonneault ’ s standard solar model , variations of standard solar models yield minimal rates of 3.6 SNU for the Homestake experiment and 114 SNU for GALLEX and SAGE .
Therefore , variations of standard solar models as solutions to the solar neutrino problem are so far inconsistent with the Homestake experiment and only marginally allowed by the gallium experiments .
If the gallium experiments confirm a flux significantly below 114 SNU , it would imply unconventional physics .