Lawrencium Isotopic Data

 

 

 

Isotope

 

Isotopic Mass

amu

 

% Abundance

 

T1/2

 

T1/2

Units

 

Mass Excess

KeV

 

Binding Energy

Per Nucleon

KeV

 

Decay

Mode

 

Branching

Ratio

251Lr

251.09436 (32)

 

150

us

87,900 (300)

7,400 (1)

B+ ?

 

252Lr

252.09537 (27)

 

390

ms

88,840 (250)

7,399 (1)

B+

71#

253Lr

253.09521 (24)

 

580

ms

88,690 (220)

7,402 (1)

A

90 10

254Lr

254.09645 (36)

 

13

s

89,850 (340)

7,400 (1)

A

76 11

255Lr

255.09668 (22)

 

22

s

90,060 (210)

7,402 (1)

A

?

256Lr

256.09863 (24)

 

27

s

91,870 (220)

7,398 (1)

A

85 10

257Lr

257.09956 (22)

 

646

ms

92,740 (210)

7,397 (1)

A~100

 

258Lr

258.10181 (11)

 

4.1

s

94,840 (100)

7,391 (0)

A>95

 

259Lr

259.102901 (76)

 

6.2

s

95,852 (71)

7,390 (0)

A

78 2

260Lr

260.10550 (12)

 

3

m

98,280 (120)

7,383 (0)

A

80 20

261Lr

261.10688 (22)

 

39

m

99,560 (200)

7,381 (1)

SF

?

262Lr

262.10963 (22)

 

~4

h

102,120 (200)

7,374 (1)

B+

?

263Lr

263.11129 (39)

 

5

h

103,670 (360)

7,371 (1)

A ?

 

264Lr

264.11404 (47)

 

10

h

106,230 (440)

7,364 (2)

A ?

 

265Lr

265.11584 (77)

 

10

h

107,900 (710)

7,360 (3)

A ?

 

266Lr

266.11931 (70)

 

1

h

111,130 (660)

7,351 (2)

A ?

 

253mLr

253.09521 (24)

 

1.5

s

88,690 (220)

7,402 (1)

A

90 10

252mLr

252.09537 (27)

 

 

 

88,840 (250)

7,399 (1)

0

 

254mLr

254.09645 (36)

 

 

 

89,850 (340)

7,400 (1)

0

 

256mLr

256.09863 (24)

 

 

 

91,870 (220)

7,398 (1)

0

257mLr

257.09956 (22)

 

 

 

92,740 (210)

7,397 (1)

0

 

258mLr

258.10181 (11)

 

 

 

94,840 (100)

7,391 (0)

0

 

259mLr

259.102901 (76)

 

 

 

95,852 (71)

7,390 (0)

0

 

Data Source: ENSDF March 2005

©Radiochemistry Society 2005