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A. W. Sunyar helped measure neutrino helicity with Maurice Goldhaber and L. Grodzins in 1958. Nuclear-recoil selection, magnetic polarization analysis and resonance-scattered gamma-ray counting linked a measurable photon signal to the emitted neutrino's handedness.^[ref]

The experiment inferred the neutrino property through angular-momentum correlations rather than requiring a direct track of the escaping neutrino.

L. Grodzins, with Maurice Goldhaber and A. W. Sunyar, investigated neutrino helicity through correlated nuclear recoil and gamma-ray polarization. Their 1958 result established negative helicity for the neutrinos selected by the experiment.^[ref]

The method combined several physical filters: a polarization-sensitive photon measurement became informative about an unobserved neutrino only through the selected nuclear process and conservation of angular momentum.

Maurice Goldhaber, L. Grodzins and A. W. Sunyar inferred neutrino helicity indirectly from a nuclear-decay sequence. After electron capture, the recoiling excited nucleus emits a gamma ray; selecting resonantly scattered gamma rays preferentially selects a recoil direction. A magnetized absorber analyzes the circular polarization of that selected radiation. Combining the angular-momentum relation with the measured polarization gave evidence for negative neutrino helicity, rather than requiring a direct spin measurement on a detected neutrino.^[ref]