UV Spectrum and Proposed Role of Diethylberyllium in a 7 Li- 7 Be Solar Neutrino Experiment

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Abstract
Although measurement of the solar neutrino flux via the 7 Li( v e ,e – ) 7 Be reaction was proposed many years ago, no experiment has been implemented since it has been difficult to identify a sensitive 7 Be detection technique. Here it is proposed that the 7 Be atom be incorporated into a volatile molecule, placed in a buffer-gas-filled cell, and then extracted by photodissociation; after excitation by a tunable laser, bursts of photons would be detected. The absorption spectrum of the molecular candidate diethylberyllium has been measured between 186 and 270 nanometers in a spectrophotometer to determine the required photodissociation laser wavelength and intensity.