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 ${\mathrm{A}}^{36}$ 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: ${\mathrm{A}}^{36}\mathrm{}\left(\mathrm{dp}\right)\mathrm{}{\mathrm{A}}^{37}$ 6.59; 5.06; 4.92; 4.32; 4.03; 3.13 and 1.58 and ${\mathrm{A}}^{40}\mathrm{}\left(\mathrm{dp}\right)\mathrm{}{\mathrm{A}}^{41}$ 3.84; 3.18; 2.63; 2.50; 1.90; 1.57; 1.04; 0.55; 0.15; -0.17. The mass difference ${\mathrm{A}}^{37}$-${\mathrm{A}}^{36}$ is 0.99951 and ${\mathrm{A}}^{41}$-${\mathrm{A}}^{40}$ 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 ${\mathrm{A}}^{37}$ is at an unusually high value.