Proton Groups from the Bombardment of Argon by Deuterons

The deuteron bombardment of argon in both ordinary form and with a 26 percent concentration of A³⁶ shows the presence of thirteen groups of protons. Correct assignment to isotope can be made for ten of these and probable assignment for the others. The Q-values for the reactions are: A³⁶(dp)A³⁷ 6.59; 5.06; 4.92; 4.32; 4.03; 3.13 and 1.58 and A⁴⁰(dp)A⁴¹ 3.84; 3.18; 2.63; 2.50; 1.90; 1.57; 1.04; 0.55; 0.15; -0.17. The mass difference A³⁷-A³⁶ is 0.99951 and A⁴¹-A⁴⁰ is 1.00247. Considering that the nuclei differ by four neutrons there is surprisingly little difference in general level structure. The first excited state of A³⁷ is at an unusually high value.