Isotopes of Rutherfordium - Table

Table

nuclide
symbol
Z(p) N(n)
isotopic mass (u)
half-life decay
mode(s)
daughter
isotope(s)
nuclear
spin
excitation energy
253Rf 104 149 253.10069(49)# 13(5) ms SF (51%) (various) (7/2)(+#)
α (49%) 249No
253mRf 200(150)# keV 52(14) µs
(1/2)(-#)
254Rf 104 150 254.10018(31)# 23(3) µs SF (99.7%) (various) 0+
α (.3%) 250No
255Rf 104 151 255.10134(19)# 1.64(11) s SF (52%) (various) (9/2-)#
α (48%) 251No
256Rf 104 152 256.101166(26) 6.45(14) ms SF (96%) (various) 0+
α (6%) 252No
257Rf 104 153 257.10299(11)# 4.7(3) s α (79%) 253No (1/2+)
β+ (18%) 257Lr
SF (2.4%) (various)
257mRf 114(17) keV 3.9(4) s (11/2-)
258Rf 104 154 258.10349(22)# 12(2) ms SF (87%) (various) 0+
α (13%) 254No
259Rf 104 155 259.10564(8)# 2.8(4) s α (93%) 255No 7/2+#
SF (7%) (various)
β+ (.3%) 259Lr
260Rf 104 156 260.10644(22)# 21(1) ms SF (98%) (various) 0+
α (2%) 256No
261Rf 104 157 261.10877(3) 5.5(25) s α (76%) 257No 3/2+#
β+ (14%) 261Lr
SF (10%) (various)
261mRf 70(100)# keV 81(9) s β+ 261Lr 9/2+#
α (rare) 257No
262Rf 104 158 262.10993(30)# 2.3(4) s SF (99.2%) (various) 0+
α (.8%) 258No
262mRf 600(400)# keV 47(5) ms SF (various) high
263Rf 104 159 263.11255(20)# 11(3) min SF (70%) (various) 3/2+#
α (30%) 259No
265Rf 104 161 2.5 min SF (various)
266Rf 104 162 266.11796(58)# 10# h 0+
267Rf 104 163 267.12153(62)# 5# h
SF (various)
268Rf 104 164 268.12364(76)# 1# h 0+

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