ABSTRACT
An experiment is currently underway [1] to test directly the theory of stellar energy generation by observing the relatively high-energy neutrinos (14 MeV maximum energy) emitted from the interior of the sun in the rare mode of the proton-proton chain that involves B8[2]. As a follow-up to this experiment, the author has proposed [3] that a program of neutrino-spectroscopy of the solar interior be carried out to determine quantitatively the conditions in the interior of the sun by using a variety of neutrino-absorbers having, for example, different absorption thresholds. It would be particularly desirable to try to observe the numerous low-energy neutrinos from the basic reaction, H1(p, e+ v e)H1 of the proton-proton chain (0.43 MeV maximum energy) and from the frequently occurring Be7(e−, v)Li7 reaction (0.86 MeV maximum energy). The ratio of B8 neutrinos to low-energy neutrinos would provide a crucial and stringent test of current theories of the interior of main sequence stars. If no neutrinos are detected in the Davis-Harm er experiment [1] (0.81 MeV threshold energy), it will be even more desirable to try to observe the low-energy neutrinos.
