Isotopes of hassium
List of isotopes

Isotopes of hassium

Section Title: List of isotopes
Table Section Text: None

nuclide symbol	Z(p)	N(n)	Isotopic mass (u)	Half-life	Decay mode(s)	Daughter isotope(s)	Nuclear spin and parity

Excitation energy

263Hs	108	155	263.12856(37)#	760(40) µs	α	259Sg	7/2+#

264Hs	108	156	264.12836(3)	540(300) µs	α (50%)	260Sg	0+

SF (50%)	(various)

265Hs	108	157	265.129793(26)	1.96(0.16) ms	α	261Sg	9/2+#

265mHs	300(70) keV	360(150) µs	α	261Sg	3/2+#

266Hs	108	158	266.13005(4)	3.02(0.54) ms	α (68%)	262Sg	0+

SF (32%)	(various)

266mHs	1100(70) keV	280(220) ms	α	262Sg	9-#

267Hs	108	159	267.13167(10)#	55(11) ms	α	263Sg	5/2+#

267mHs	39(24) keV	990(90) µs	α	263Sg

268Hs	108	160	268.13187(30)#	1.42(1.13) s	α	264Sg	0+

269Hs	108	161	269.13375(13)#	9.7 s	α	265Sg	9/2+#

270Hs	108	162	270.13429(27)#	10 s	α	266Sg	0+

271Hs	108	163	271.13717(32)#	~4 s	α	267Sg

273Hs	108	165	273.14168(40)#	510 ms	α	269Sg	3/2+#

275Hs	108	167	275.14667(63)#	290(150) ms	α	271Sg

277Hs	108	169	277.15190(58)#	11(9) ms	SF	(various)	3/2+#

Sentence(s)

The isotope ²⁶⁸Hs underwent alpha-decay to give isotope ²⁶⁴Sg.

final_sentence: The isotope ²⁶⁸Hs underwent alpha-decay to give isotope ²⁶⁴Sg.