出典: フリー百科事典『ウィキペディア（Wikipedia）』
ハフニウム Hf )の標準原子量 は178.49(2) u である。
同位体核種
Z(p )
N(n )
同位体質量 (u )
半減期
核スピン数
天然存在比
天然存在比
励起エネルギー
153 Hf
72
81
152.97069(54)#
400# ms [>200 ns]
1/2+#
153m Hf
750(100)# keV
500# ms
11/2-#
154 Hf
72
82
153.96486(54)#
2(1) s
0+
155 Hf
72
83
154.96339(43)#
890(120) ms
7/2-#
156 Hf
72
84
155.95936(22)
23(1) ms
0+
156m Hf
1959.0(10) keV
480(40) µs
8+
157 Hf
72
85
156.95840(21)#
115(1) ms
7/2-
158 Hf
72
86
157.954799(19)
2.84(7) s
0+
159 Hf
72
87
158.953995(18)
5.20(10) s
7/2-#
160 Hf
72
88
159.950684(12)
13.6(2) s
0+
161 Hf
72
89
160.950275(24)
18.2(5) s
3/2-#
162 Hf
72
90
161.94721(1)
39.4(9) s
0+
163 Hf
72
91
162.94709(3)
40.0(6) s
3/2-#
164 Hf
72
92
163.944367(22)
111(8) s
0+
165 Hf
72
93
164.94457(3)
76(4) s
(5/2-)
166 Hf
72
94
165.94218(3)
6.77(30) min
0+
167 Hf
72
95
166.94260(3)
2.05(5) min
(5/2)-
168 Hf
72
96
167.94057(3)
25.95(20) min
0+
169 Hf
72
97
168.94126(3)
3.24(4) min
(5/2)-
170 Hf
72
98
169.93961(3)
16.01(13) h
0+
171 Hf
72
99
170.94049(3)
12.1(4) h
7/2(+)
171m Hf
21.93(9) keV
29.5(9) s
1/2(-)
172 Hf
72
100
171.939448(26)
1.87(3) a
0+
172m Hf
2005.58(11) keV
163(3) ns
(8-)
173 Hf
72
101
172.94051(3)
23.6(1) h
1/2-
174 Hf
72
102
173.940046(3)
2.0(4)E+15 a
0+
0.0016(1)
0.001619-0.001621
174m1 Hf
1549.3 keV
138(4) ns
(6+)
174m2 Hf
1797.5(20) keV
2.39(4) µs
(8-)
174m3 Hf
1797.5 keV
2.39(4) µs
(8-)
174m4 Hf
3311.7 keV
3.7(2) µs
(14+)
175 Hf
72
103
174.941509(3)
70(2) d
5/2-
176 Hf
72
104
175.9414086(24)
STABLE
0+
0.0526(7)
0.05206-0.05271
177 Hf
72
105
176.9432207(23)
STABLE
7/2-
0.1860(9)
0.18593-0.18606
177m1 Hf
1315.4504(8) keV
1.09(5) s
23/2+
177m2 Hf
1342.38(20) keV
55.9(12) µs
(19/2-)
177m3 Hf
2740.02(15) keV
51.4(5) min
37/2-
178 Hf
72
106
177.9436988(23)
STABLE
0+
0.2728(7)
0.27278-0.27297
178m1 Hf
1147.423(5) keV
4.0(2) s
8-
178m2 Hf
2573.5(5) keV
68(2) µs
(14-)
178m3 Hf
2445.69(11) keV
31(1) a
16+
179 Hf
72
107
178.9458161(23)
STABLE
9/2+
0.1362(2)
0.13619-0.1363
179m1 Hf
375.0367(25) keV
18.67(4) s
1/2-
179m2 Hf
1105.84(19) keV
25.05(25) d
25/2-
180 Hf
72
108
179.9465500(23)
STABLE
0+
0.3508(16)
0.35076-0.351
180m1 Hf
1141.48(4) keV
5.47(4) h
8-
180m2 Hf
1374.15(4) keV
0.57(2) µs
(4-)
180m3 Hf
2425.8(10) keV
15(5) µs
(10+)
180m4 Hf
2486.3(9) keV
10(1) µs
12+
180m5 Hf
2538.3(12) keV
>10 µs
(14+)
180m6 Hf
3599.3(18) keV
90(10) µs
(18-)
181 Hf
72
109
180.9491012(23)
42.39(6) d
1/2-
181m1 Hf
595(3) keV
80(5) µs
(9/2+)
181m2 Hf
1040(10) keV
~100 µs
(17/2+)
181m3 Hf
1738(10) keV
1.5(5) ms
(27/2-)
182 Hf
72
110
181.950554(7)
8.90(9)E+6 a
0+
182m Hf
1172.88(18) keV
61.5(15) min
8-
183 Hf
72
111
182.95353(3)
1.067(17) h
(3/2-)
184 Hf
72
112
183.95545(4)
4.12(5) h
0+
184m Hf
1272.4(4) keV
48(10) s
8-
185 Hf
72
113
184.95882(21)#
3.5(6) min
3/2-#
186 Hf
72
114
185.96089(32)#
2.6(12) min
0+
187 Hf
72
115
186.96459(43)#
30# s [>300 ns]
188 Hf
72
116
187.96685(54)#
20# s [>300 ns]
0+
Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report) . Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) .
Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties , Nuc. Phys. A 729, pp. 3-128 (2003).
National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (retrieved Sept. 2005).
David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition , online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes. 
カテゴリ