The high-dispersion absorption spectrum of Cu I is reported for the 1570–2500 Å region. Observations include the electric dipole allowed transitions 3d104s2S -3d10np2Pº (n = 5-57), 3d94s22D -3d10np2Pº (n = 6-17) and 3d94s22D -3d10nƒ2Fº (n = 5,8), the electric quadrupole allowed transitions 3d104s2S -3d10nd2D (n = 4-8), and the forbidden transitions 3d104s2S -3 d10ns2S (n = 20-41). A number of transitions from 3d104s2S and 3d94s22D to levels associated with excited terms previously designated w, x, y, and z are also reported. An improved ionization potential for Cu I is 62 317.44 ± 0.10 cm-1.
© 1980 Optical Society of America
M. S. Longmire, C. M. Brown, and M. L. Ginter, "Absorption spectrum of Cu I between 1570 Å and 2500 Å," J. Opt. Soc. Am. 70, 423-429 (1980)