Branching ratios have been measured for reactions initiated by negative kaons coming to rest in a helium bubble chamber. The data were obtained from an analysis of -1000 events found in a careful scan using a very limited fiducial volume. Charged2 emission accounts for (30.8~k3.2)7~ of the absorptions and A/ZO emission for (69.2&6.6)%. Evidence for Z-to-A conversion is clearly seen in the events with a visible A+r-, and (66&9)y0 of this final state results from such a process. Multinucleon (i.e., nonpionic) absorption is found to occur in (16.53~2.6)7~ of the events, which is similar to the results reported from studies using heavy-liquid bubble chambers and nuclear emulsion. In general, the kinematic spectra for single-nucleon absorption events agree well with the predictions of a simple impulse approximation. The ratio of Kcapture on neutrons to that on protons is examined using the An-He3 and the An0H3 final states. The data for charged-and neutral-particle emission are consistent with the predictions of isospin invariance for kaon absorption in He4.

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