# Japan-Lithuania Opacity Database for Kilonova (version 1.1)
# HULLAC
# M. Tanaka, D. Kato, G. Gaigalas, K. Kawaguchi, "Systematic opacity calculations for kilonovae" Monthly Notices of the Royal Astronomical Society 496 (2020) 1369-1392.

# Japan-Lithuania Opacity Database for Kilonova (version 2.0)
# HULLAC
# D. Kato, M. Tanaka, G. Gaigalas, L. Kitovienė, P. Rynkun, "Systematic opacity calculations for kilonovae – II. Improved atomic data for singly ionized lanthanides" Monthly Notices of the Royal Astronomical Society 535 (2024) 2670-2686.
# GRASP
# G. Gaigalas, D. Kato, P. Rynkun, L. Radžiūtė, M. Tanaka, "Extended Calculations of Energy Levels and Transition Rates of Nd ii-iv Ions for Application to Neutron Star Mergers" The Astrophysical Journal Supplement Series 240 (2019) 29.
# L. Radžiūtė, G. Gaigalas, D. Kato, P. Rynkun, M. Tanaka, "Extended Calculations of Energy Levels and Transition Rates for Singly Ionized Lanthanide Elements. I. Pr–Gd" The Astrophysical Journal Supplement Series 248 (2020) 17.
# L. Radžiūtė, G. Gaigalas, D. Kato, P. Rynkun, M. Tanaka, "Extended Calculations of Energy Levels and Transition Rates for Singly Ionized Lanthanide Elements. II. Tb−Yb" The Astrophysical Journal Supplement Series 257 (2021) 29.



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# Atomic data table
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- Atomic number = 26 - 88
- Charge state = from neutral to triply charged ions 

# File format 
X = Atomic number
Y = Spectroscopic notation of ionization state (1 = I, 2 = II, 3 = III, and 4 = IV)

- XX_Y.txt
Spectrum name
XX, Y
Number of Energy levels, Number of Transitions
Closed shells
Ionization potential:IP (eV) from NIST Atomic Spectra Database (version 5.9)
Energy levels below IP:
#num / 2*J+1 / Parity / E (eV) / Configuration
Electric dipole transitions:
Upper #num / Lower #num / Wavelength (nm) / g_up*A (s^-1) / log10(g_low*f)