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On Calculation of the Hydrogen Negative Ion Beta Spectrum

The wavefunctions of the ground states of negative hydrogen ion and the 10 first lowest states of helium atom are calculated by using a general wavefunction expansion form. The beta spectrum of the negative tritium ion is given by calculating a few most important transitions and including the remainder in terms of the closure approximation. Besides, the transition to state is also studied. The result showed that the transition to a double-electron excited state of the helium atom may be very important. It indicates that there probably exists a resonance in the continuous spectrum.