We analyze the sensitivity of parity experiments in singly ionized helium to the weak neutral-current interaction between electrons and nucleons. Such experiments could eventually provide measurements of the radiative corrections to the weak neutral-current coupling constants and precision measurements of the Weinberg angle. Some new ``quasioptical'' techniques for measuring parity nonconservation are discussed, and these appear to be particularly suitable for parity experiments in He⁺. The problem of systematic effects caused by unwanted electric fields is considered, and the effect of electric fields arising from motion of He⁺ ions transverse to a magnetic field is analyzed in detail.
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R. W. Dunford (1986) studied this question.
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