Table:
text: Hassium
Isotopes
List of hassium isotopes
Isotope Half_life Decay_mode Discovery_year Reaction
269m Hs 9.7 s α 2004 248 Cm( 26 Mg,5n)
270 Hs 3.6 s α 2004 248 Cm( 26 Mg,4n)
271 Hs ~4 s α 2004 248 Cm( 26 Mg,3n)
272 Hs 40? s α, SF ? unknown —
273 Hs 0.24 s α 2004 285 Fl(—,3α)
274 Hs 1? min α, SF ? unknown —
275 Hs 0.15 s α 2003 287 Fl(—,3α)
276 Hs 1? h α, SF ? unknown —
277 Hs 2 s α 2009 289 Fl(—,3α)
277m Hs ? ~11 min ? α 1999 289 Fl(—,3α)

Question: What is the half-life of hassium discovered in 2003?