Persistent Lines of Neutral Thallium ( Tl I )

Wavelength  Energy         Configuration    Term   J  
   (Å)      Levels (cm-1)

 2379.69         0.0       5d106s26p        2P°    1/2
             42011.4       5d106s27d        2D     3/2
  return
 
 2580.14         0.0       5d106s26p        2P°    1/2
             38745.9       5d106s28s        2S     1/2
  return
 
 2767.87         0.0       5d106s26p        2P°    1/2
             36117.9       5d106s26d        2D     3/2
  return
 
 2918.32      7792.7       5d106s26p        2P°    3/2
             42049.0       5d106s27d        2D     5/2
  return
 
 3229.75      7792.7       5d106s26p        2P°    3/2
             38745.9       5d106s28s        2S     1/2
  return
 
 3519.24      7792.7       5d106s26p        2P°    3/2
             36199.9       5d106s26d        2D     5/2
  return
 
 3529.43      7792.7       5d106s26p        2P°    3/2
             36117.9       5d106s26d        2D     3/2
  return
 
 3775.72         0.0       5d106s26p        2P°    1/2
             26477.5       5d106s27s        2S     1/2
  return
 
 5350.46      7792.7       5d106s26p        2P°    3/2
             26477.5       5d106s27s        2S     1/2
  return
 
11512.82     26477.5       5d106s27s        2S     1/2
             35161.1       5d106s27p        2P°    3/2
  return
 
13013.2      26477.5       5d106s27s        2S     1/2
             34159.9       5d106s27p        2P°    1/2
  return