Table:
text: Hassium
Isotopes
List of hassium isotopes
Isotope Half_life Decay_mode Discovery_year Reaction
263 Hs 0.74 ms α, SF 2008 208 Pb( 56 Fe,n)
264 Hs ~0.8 ms α, SF 1986 207 Pb( 58 Fe,n)
265 Hs 1.9 ms α, SF 1984 208 Pb( 58 Fe,n)
265m Hs 0.3 ms α 1984 208 Pb( 58 Fe,n)
266 Hs 2.3 ms α, SF 2000 270 Ds(—,α)
267 Hs 52 ms α, SF 1995 238 U( 34 S,5n)
267m Hs 0.8 s α 1995 238 U( 34 S,5n)
268 Hs 0.4 s α 2009 238 U( 34 S,4n)
269 Hs 3.6 s α 1996 277 Cn(—,2α)

Question: Under Hassium, what is the decay mode of the 265 m hs isotope discovered in 1984?