Neptunium

Energy levels of neutral Neptunium - ²³⁷Np I

• Introduction
• References
• Neptunium I even
  • Levels obtained par laser spectroscopy
• Neptunium I odd
  • Levels obtained par laser spectroscopy

Energy levels of singly-ionized Neptunium - ²³⁷Np II

• Introduction
• References
• Neptunium II even
• Neptunium II odd

Energy levels of trebly-ionized Berkelium - ²³⁷Np IV

• Introduction
• References
• Neptunium IV