Isotopes of darmstadtium
List of isotopes
Abbreviations: SF: Spontaneous fission Unconfirmed isotope Not directly synthesized, occurs in decay chain of ²⁸⁵Fl Not directly synthesized, occurs as decay product of ²⁸³Cn Not directly synthesized, occurs in decay chains of ²⁸⁸Mc and ²⁹²Lv; unconfirmed Not directly synthesized, occurs in decay chain of ²⁸⁹Fl

Isotopes of darmstadtium

Section Title: List of isotopes
Table Section Text: Abbreviations: SF: Spontaneous fission Unconfirmed isotope Not directly synthesized, occurs in decay chain of ²⁸⁵Fl Not directly synthesized, occurs as decay product of ²⁸³Cn Not directly synthesized, occurs in decay chains of ²⁸⁸Mc and ²⁹²Lv; unconfirmed Not directly synthesized, occurs in decay chain of ²⁸⁹Fl

nuclide symbol	Z(p)	N(n)	isotopic mass (u)	half-life	decay mode(s)	daughter isotope(s)	nuclear spin and parity

excitation energy

267Ds	110	157	267.14377(15)#	3(+6−2) µs	α ?	263Hs ?	9/2+#

269Ds	110	159	269.14475(3)	230(110) µs [179(+245−66) µs]	α	265Hs	3/2+#

270Ds	110	160	270.14458(5)	160(100) µs [0.10(+14−4) ms]	α	266Hs	0+

270mDs	1140(70) keV	10(6) ms [6.0(+82−22) ms]	α	266Hs	(10)(−#)

271Ds	110	161	271.14595(10)#	210(170) ms	α	267Hs	11/2−#

271mDs	29(29) keV	1.3(5) ms	α	267Hs	9/2+#

273Ds	110	163	273.14856(14)#	0.17(+17−6) ms	α	269Hs	13/2−#

277Ds	110	167	277.15591(41)#	3.5 ms	α	273Hs	11/2+#

279Ds	110	169	279.16010(64)#	0.18(+5−3) s	SF (90%)	(various)

α (10%)	275Hs

280Ds	110	170	280.16131(89)#	6.7 ms	SF	(various)	0+

281Ds	110	171	281.16451(59)#	9.6 s	SF (94%)	(various)	3/2+#

α (6%)	277Hs

Sentence(s)

The longest-lived isotope is ²⁸¹Ds with a half-life of 9.6 seconds.
The longest-lived isotope is ²⁸¹Ds with a half-life of 9.6 seconds.
The ²⁸¹Ds has a half-life of 9.6 seconds.

final_sentence: The longest-lived isotope is ²⁸¹Ds with a half-life of 9.6 seconds.
final_sentence: The longest-lived isotope is ²⁸¹Ds with a half-life of 9.6 seconds.
final_sentence: The ²⁸¹Ds has a half-life of 9.6 seconds.