Document Type

Article

Publication Date

6-1-1975

Publication Title

The Astrophysical Journal

Publisher

The American Astronomical Society

Abstract

We calculate the composite spectrum of γ-rays resulting from the decay of 56Ni to 56Co to 56Fe throughout the history of the universe. The results for several cosmological models are presented and compared with the Apollo 15 measurements at low resolution of the cosmic background. The radioactivity background is a significant fraction of the total, and several of its features may be detectable.

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