Isotope

Isotopic Mass

amu

% Abundance

T_1/2

T_1/2

Units

Mass Excess

KeV

Binding Energy

Per Nucleon

KeV

Decay

Mode

Branching

Ratio

¹¹⁷La

116.95007 (43)

23.5

ms

-46,510 (400)

8,088 (3)

p

?

¹¹⁸La

117.94673 (32)

200

ms

-49,620 (300)

8,114 (3)

B+ ?

¹¹⁹La

118.94099 (43)

1

s

-54,970 (400)

8,158 (3)

B+ ?

¹²⁰La

119.93807 (54)

2.8

s

-57,690 (500)

8,180 (4)

B+

100

¹²¹La

120.93301 (54)

5.3

s

-62,400 (500)

8,218 (4)

B+

100

¹²²La

121.93071 (32)

8.7

s

-64,540 (300)

8,235 (2)

B+

100

¹²³La

122.92624 (21)

17

s

-68,710 (200)

8,267 (2)

B+

100

¹²⁴La

123.924574 (61)

29.21

s

-70,259 (57)

8,278.3 (4.6)

B+

100

¹²⁵La

124.920816 (28)

64.8

s

-73,759 (26)

8,304.6 (2.1)

B+

100

¹²⁶La

125.919513 (97)

54

s

-74,973 (91)

8,312.4 (7.2)

B+

100

¹²⁷La

126.916375 (28)

5.1

m

-77,896 (26)

8,333.5 (2)

B+

100

¹²⁸La

127.915585 (58)

5.18

m

-78,632 (54)

8,337.2 (4.2)

B+

100

¹²⁹La

128.912693 (22)

11.6

m

-81,326 (21)

8,356.1 (1.6)

B+

100

¹³⁰La

129.912369 (28)

8.7

m

-81,628 (26)

8,356.2 (2)

B+

100

¹³¹La

130.910070 (30)

59

m

-83,769 (28)

8,370.4 (2.1)

B+

100

¹³²La

131.910101 (42)

4.8

h

-83,740 (39)

8,367.9 (3)

B+

100

¹³³La

132.908218 (30)

3.912

h

-85,494 (28)

8,378.8 (2.1)

B+

100

¹³⁴La

133.908514 (21)

6.45

m

-85,219 (20)

8,374.5 (1.5)

B+

100

¹³⁵La

134.906977 (11)

19.5

h

-86,651 (10)

8,382.85 (7.4)

B+

100

¹³⁶La

135.907636 (57)

9.87

m

-86,037 (53)

8,376.0 (3.9)

B+

¹³⁷La

136.906494 (14)

60

ky

-87,101 (13)

8,381.59 (9.8)

EC

100

¹³⁸La

137.9071119 (38)

0.090 (1)

102

Gy

-86,524.7 (3.5)

8,375.16 (2.6)

¹³⁹La

138.9063533 (26)

99.910 (1)

stable

-87,231.4 (2.4)

8,378.06 (1.7)

¹⁴⁰La

139.9094776 (26)

1.6781

d

-84,321.0 (2.4)

8,355.08 (1.7)

B-

100

¹⁴¹La

140.9109622 (49)

3.92

h

-82,938.2 (4.6)

8,343.26 (3.2)

B-

100

¹⁴²La

141.9140791 (61)

91.1

m

-80,034.8 (5.7)

8,320.90 (4)

B-

100

¹⁴³La

142.916063 (17)

14.2

m

-78,187 (15)

8,306.2 (1.1)

B-

100

¹⁴⁴La

143.919600 (52)

40.8

s

-74,892 (49)

8,281.7 (3.4)

B-

100

¹⁴⁵La

144.921645 (97)

24.8

s

-72,987 (90)

8,267.1 (6.2)

B-

100

¹⁴⁶La

145.925793 (77)

6.27

s

-69,123 (71)

8,239.3 (4.9)

B-

100

¹⁴⁷La

146.928235 (52)

4.015

s

-66,848 (48)

8,222.7 (3.3)

B-

100

¹⁴⁸La

147.932229 (63)

1.26

s

-63,128 (59)

8,196.6 (4)

B-

100

¹⁴⁹La

148.93473 (34)

1.05

s

-60,800 (320)

8,180 (2)

B-

100

¹⁵⁰La

149.93877 (43)

510

ms

-57,040 (400)

8,154 (3)

B-

100

¹⁵¹La

150.94172 (43)

300

ms

-54,290 (400)

8,136 (3)

B- ?

¹⁵²La

151.94625 (43)

200

ms

-50,070 (400)

8,107 (3)

B- ?

¹⁵³La

152.94962 (64)

150

ms

-46,930 (600)

8,087 (4)

B- ?

¹⁵⁴La

153.95450 (64)

100

ms

-42,380 (600)

8,057 (4)

B- ?

¹⁵⁵La

154.95835 (86)

60

ms

-38,800 (800)

8,034 (5)

B- ?

^117mLa

116.95007 (43)

10

ms

-46,510 (400)

8,088 (3)

p

?

^124mLa

123.924574 (61)

21

s

-70,259 (57)

8,278.3 (4.6)

B+

100

^125mLa

124.920816 (28)

390

ms

-73,759 (26)

8,304.6 (2.1)

IT

100

^126mLa

125.919513 (97)

20

s

-74,973 (91)

8,312.4 (7.2)

B+

100

^127mLa

126.916375 (28)

3.7

m

-77,896 (26)

8,333.5 (2)

B+~100

^128mLa

127.915585 (58)

<1.4

m

-78,632 (54)

8,337.2 (4.2)

B+

100

^129mLa

128.912693 (22)

560

ms

-81,326 (21)

8,356.1 (1.6)

IT

100

^131mLa

130.910070 (30)

170

us

-83,769 (28)

8,370.4 (2.1)

IT

100

^132mLa

131.910101 (42)

24.3

m

-83,740 (39)

8,367.9 (3)

IT

76

^133mLa

132.908218 (30)

62

ns

-85,494 (28)

8,378.8 (2.1)

0

^136mLa

135.907636 (57)

114

ms

-86,037 (53)

8,376.0 (3.9)

IT

100

^138mLa

137.9071119 (38)

116

ns

-86,524.7 (3.5)

8,375.16 (2.6)

IT

100

^146mLa

145.925793 (77)

10

s

-69,123 (71)

8,239.3 (4.9)

B-

100