The Artificial Radioactivity of Copper, a Branch Reaction

S. N. van Voorhis
Phys. Rev. 50, 895 – Published 15 November 1936
PDFExport Citation

Abstract

The artificial radioactivity of longer half-life produced in copper by deuteron bombardment is studied. It is found to emit both electrons and positrons in the ratio 1.6 to 1. The half-life is found to be 12.8±0.1 hours. The excitation curve of positrons and electrons for deuterons of different energies is studied and found to agree with the theoretical expression of Oppenheimer and Phillips. The upper limits of the energy distribution of the positrons and electrons are obtained from cloud chamber photographs, and are found to be 0.79 and 0.83 Mev, respectively. The results are interpreted as showing that this activity is due to Cu64 which branches in disintegrating, going either to zinc or nickel.

  • Received 10 September 1936

DOI:https://doi.org/10.1103/PhysRev.50.895

©1936 American Physical Society

Authors & Affiliations

S. N. van Voorhis*

  • Radiation Laboratory, Department of Physics, University of California, Berkeley, California

  • *National Research Fellow.

References (Subscription Required)

Click to Expand
Issue

Vol. 50, Iss. 10 — November 1936

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Journals Archive

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×