Isotopes of Europium - Table

Table

nuclide
symbol		 Z(p) N(n)
isotopic mass (u)
 half-life decay
mode(s)		 daughter
isotope(s)		 nuclear
spin		 representative
isotopic
composition
(mole fraction)		 range of natural
variation
(mole fraction)
excitation energy
130Eu 63 67 129.96357(54)# 1.1(5) ms
 2+#
131Eu 63 68 130.95775(43)# 17.8(19) ms 3/2+
132Eu 63 69 131.95437(43)# 100# ms β+ 132Sm
p 131Sm
133Eu 63 70 132.94924(32)# 200# ms β+ 133Sm 11/2-#
134Eu 63 71 133.94651(21)# 0.5(2) s β+ 134Sm
β+, p (rare) 133Pm
135Eu 63 72 134.94182(32)# 1.5(2) s β+ 135Sm 11/2-#
β+, p 134Pm
136Eu 63 73 135.93960(21)# 3.3(3) s β+ (99.91%) 136Sm (7+)
β+, p (.09%) 135Pm
136mEu 0(500)# keV 3.8(3) s β+ (99.91%) 136Sm (3+)
β+, p (.09%) 135Pm
137Eu 63 74 136.93557(21)# 8.4(5) s β+ 137Sm 11/2-#
138Eu 63 75 137.93371(3) 12.1(6) s β+ 138Sm (6-)
139Eu 63 76 138.929792(14) 17.9(6) s β+ 139Sm (11/2)-
140Eu 63 77 139.92809(6) 1.51(2) s β+ 140Sm 1+
140mEu 210(15) keV 125(2) ms IT (99%) 140Eu 5-#
β+(1%) 140Sm
141Eu 63 78 140.924931(14) 40.7(7) s β+ 141Sm 5/2+
141mEu 96.45(7) keV 2.7(3) s IT (86%) 141Eu 11/2-
β+ (14%) 141Sm
142Eu 63 79 141.92343(3) 2.36(10) s β+ 142Sm 1+
142mEu 460(30) keV 1.223(8) min β+ 142Sm 8-
143Eu 63 80 142.920298(12) 2.59(2) min β+ 143Sm 5/2+
143mEu 389.51(4) keV 50.0(5) µs 11/2-
144Eu 63 81 143.918817(12) 10.2(1) s β+ 144Sm 1+
144mEu 1127.6(6) keV 1.0(1) µs (8-)
145Eu 63 82 144.916265(4) 5.93(4) d β+ 145Sm 5/2+
145mEu 716.0(3) keV 490 ns 11/2-
146Eu 63 83 145.917206(7) 4.61(3) d β+ 146Sm 4-
146mEu 666.37(16) keV 235(3) µs 9+
147Eu 63 84 146.916746(3) 24.1(6) d β+ (99.99%) 147Sm 5/2+
α (.0022%) 143Pm
148Eu 63 85 147.918086(11) 54.5(5) d β+ (100%) 148Sm 5-
α (9.39×10−7%) 144Pm
149Eu 63 86 148.917931(5) 93.1(4) d EC 149Sm 5/2+
150Eu 63 87 149.919702(7) 36.9(9) a β+ 150Sm 5(-)
150mEu 42.1(5) keV 12.8(1) h β- (89%) 150Gd 0-
β+ (11%) 150Sm
IT (5×10−8%) 150Eu
151Eu 63 88 150.9198502(26) 5×1018 a α 147Pm 5/2+ 0.4781(6)
151mEu 196.245(10) keV 58.9(5) µs 11/2-
152Eu 63 89 151.9217445(26) 13.537(6) a β+ (72.09%) 152Sm 3-
β- (27.9%) 152Gd
152m1Eu 45.5998(4) keV 9.3116(13) h β- (72%) 152Gd 0-
β+ (28%) 152Sm
152m2Eu 65.2969(4) keV 0.94(8) µs 1-
152m3Eu 78.2331(4) keV 165(10) ns 1+
152m4Eu 89.8496(4) keV 384(10) ns 4+
152m5Eu 147.86(10) keV 96(1) min 8-
153Eu 63 90 152.9212303(26) Observationally Stable 5/2+ 0.5219(6)
154Eu 63 91 153.9229792(26) 8.593(4) a β- (99.98%) 154Gd 3-
EC (.02%) 154Sm
154m1Eu 145.3(3) keV 46.3(4) min IT 154Eu (8-)
154m2Eu 68.1702(4) keV 2.2(1) µs 2+
155Eu 63 92 154.9228933(27) 4.7611(13) a β- 155Gd 5/2+
156Eu 63 93 155.924752(6) 15.19(8) d β- 156Gd 0+
157Eu 63 94 156.925424(6) 15.18(3) h β- 157Gd 5/2+
158Eu 63 95 157.92785(8) 45.9(2) min β- 158Gd (1-)
159Eu 63 96 158.929089(8) 18.1(1) min β- 159Gd 5/2+
160Eu 63 97 159.93197(22)# 38(4) s β- 160Gd 1(-)
161Eu 63 98 160.93368(32)# 26(3) s β- 161Gd 5/2+#
162Eu 63 99 161.93704(32)# 10.6(10) s β- 162Gd
163Eu 63 100 162.93921(54)# 6# s β- 163Gd 5/2+#
164Eu 63 101 163.94299(64)# 2# s β- 164Gd
165Eu 63 102 164.94572(75)# 1# s β- 165Gd 5/2+#
166Eu 63 103 165.94997(86)# 400# ms β- 166Gd
167Eu 63 104 166.95321(86)# 200# ms β- 167Gd 5/2+#

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