R. Alonso et al., ON THE ELECTRON STABILITY MEASURED BY THE COINCIDENCE SPECTROSCOPY, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 383(2-3), 1996, pp. 451-453
The fast-slow coincidence technique has been used for the first time t
o measure the electron half-life, obtaining a very simple way for extr
acting noise background from real signals. In this paper we present a
986h measurement for the channel e(-) --> gamma + nu, realized in a la
boratory practically without any cosmic-ray shielding and with common
low-resolution BaF2 scintillators, obtaining a period of T-e > 3.15 x
10(21) yr. This result is analized in comparision with previous report
s obtained in ultra-low background, massive and high resolution Ge det
ectors located thousand meters underground. So, an extrapolation of th
e limit that would be obtained under such conditions is evaluated.