Fermi introduces theory of beta decay, including supposition of the neutrino. Translation published by Fred L. Wilson in the American Journal of Physics, Dec. 1968.

Predecessor He-6 experiment

Invited paper at APS New York 1950 summarized Wu's beta-decay experimental work.

Used Columbia spectrometer to calculate revised comparative lifetime of He6

Wu overiew of the coupling constant problem. 
Covers recalculation of He6 endpoint. 
Cites prepublication R-R work via private communication.

First publication of Rustad-Ruby results. Together with Allen-Jentschke, seen as definitive determination of Tensor coupling in GT interactions

Success of Rustad-Ruby for GT interactions leads to search for similar experiment for F interactions. Peaslee was in the Wu orbit at Columbia and clearly had early knowledge of the Rustad-Ruby results. His letter was submitted before RR was published. Then the Peaslee letter was published in the very next issue.

Report by Bellamy and Moorhouse on Nuclear and Meson Physics International Conference in Glasgow includes summary of Wu’s talk on the interaction in beta decay

The classic He-6 recoil experiment by Rustad-Ruby

Note the three authors
. Rustad remained in the fold before and after the reversal of the Rustad-Ruby experiment. Schwarzchild would later collaborate with Wu on the Critical Examination report.

Finds that A35 is a suitable source for identifying the Fermi invariant in the beta- decay interaction by an angular correlation experiment. Later, such an experiment by Hammersfeld was a key piece of evidence in the RR reversal.

Big media splash by Columbia on parity violation discoveries. Page One above the fold. Franklin remembers they stopped classes for the announcement.

Wu’s famous experiment that confirmed the Lee-Yang suggestion that left-right symmetry is not conserved in weak interactions. Another concurrently published experiment by Garwin and Lederman confirmed the theory in meson decays.

Wu continued to favorably cite RR three months after her parity experiment. I am uncertain if her first reference to He6 (in relation to the Coulomb part) is about RR.

These results were reported at the New York Meeting of the American Physical Society of February 2, 1957 (C. S. Wu, post-deadline paper).
Positive R-R citation

The first experiment with contadictory results from He-6
. Paper cites Kistner-Schwarzschild-Rustad paper on suitability of A35 for correlation experiment. Received 5/28/57.

Beta decay theorist E.J. Konopinski frames the experimental conundrum.

Marshak gives Sudarshan’s experimental review at Padua conference, calling for the He6 experiment to be redone. This paper is the basis for Sudarshan and Marshak's claim of priority over Feynman and Gell-Mann for the V–A theory.

More experimental support for VA; He6 is an outlier.

Feynman calls for He6 experiment to be reviewed
Classic VA paper beat Marshak-Sudarshan to publication.

Lipkin's Editor's Note added in proof describes the yet-unpublished Brookhaven experiment on helicity of neutrinos. 

Text and abstract not recorded. 
Franklin summarizes as “mea culpa”
. Other papers cite as acknowledgement of error. Image is not from the Rustad-Ruby session.

Sudarshan-Marshak cite private communication with Wu

Wu repudiates Rustad-Ruby experiment in unpublished CU-173 Columbia University report. Franklin says letter from Wu to Cavanaugh suggests reexamination was done in November.

Experiment of He6 decay by Illinois team cites Rustad-Ruby He6 half-life calculation while reaching contradictory result.

Complete redo by Rustad and Joseph Vise in 1963.

Rustad's posthumous final publication.

pp. 226-234. 
Feynman’s aha moment was when he saw the figure in Rustad-Ruby

Dunning was the driving force in Columbia's nuclear research program. Anderson recalls the events around the early nuclear fission and uranium enrichment projects at Columbia. A highlight is the full text of Dunning's letter to Alfred Nier requesting U235 sample for testing (important to us because this connection is what brought Rustad to Columbia).

The first half of the book recounts the history of theory and experiments about beta decay and the weak interaction, including detailed analysis of the Rustad-Ruby experimental error.

Extensive excerpts are published because of their relevance to Rustad-Ruby experiment. Marshak reports that Wu remains strongly supportive of RR three months after her parity experiment.

Wu's readable textbook about Beta Decay includes a historical review, including a more distant review of the He6 events

The author appears to be confused about Wu's comments at Rochester. She described her own unpublished helicity work, not new work by Rustad-Ruby. The Goldhaber anecdote leads in to a description of his neutrino helicity experiment, performed in November 1957, which further discredited the RR experiment.

Lidofsky's appreciation of Wu's career does not address the Rustad-Ruby affair, but is nonetheless illuminating.

Originally published in Chinese in 1996. Stan Ruby was interviewed and is cited as a source. Wu's involvement in the Rustad-Ruby affair is documented.

Article by Wu's granddaughter about her own journey of discovery about her famous relative.