Gold: Properties: Isotopes

Gold: Properties

Isotopes

Natural
Abun. (%) Atomic
Mass Half-
life Decay Mode
/Energy (/MeV) Part. En.
/Intensity
(MeV/%) Cross-sect.
Ther. Neut.
(b) Spin
(h/2 pi) Magnetic
Dipl.Mom.
(nm) Electric
Quad. Mom.
(b) Gamma En.
/Intensity
(MeV/%)
¹⁷³Au 172.98616 0.06s alpha
¹⁷⁴Au 173.98462 0.12s alpha
¹⁷⁵Au 174.98152 0.2s alpha
¹⁷⁶Au 175.98006 1.2s ß⁺,E.C./ 10.37
alpha
6.26/ 80
6.29/ 20
¹⁷⁷Au 176.97692 1.3s alpha 6.115
6.15
¹⁷⁸Au 177.97576 2.6s alpha 5.92
¹⁷⁹Au 178.97317 7.5s alpha 5.85
¹⁸⁰Au 179.97231 8.1s E.C./ 8.6 0.1522
0.2564
0.5242
0.6765
0.8084
0.8597
¹⁸¹Au 180.97013 11.4s E.C./ 6.4 5.482
¹⁸²Au 181.96958 21s ß⁺,E.C./ 7.8 rad. an.
0.1549
0.2649
0.13 - 1.4
¹⁸³Au 182.96766 42s E.C./ 5.5 0.163
0.273
0.3625
¹⁸⁴Au 53s E.C.,ß⁺/ 7.2
^185mAu 6.8m ß⁺,E.C.,I.T./ 0.145
¹⁸⁵Au 184.9658 4.3m ß⁺,E.C./ 4.8 5/2^- 2.17 nm rad. an.
^186mAu -2m ß⁺,E.C. 0.1915
¹⁸⁶Au 185.9661 10.7m ß⁺,E.C./ 6.2 3^- -1.26 nm rad. an.
0.1915
0.2988
^187mAu 2.3s I.T. 9/2^-
¹⁸⁷Au 186.96446 8.3m ß⁺,E.C./ 3.9 1/2⁺ 0.54 nm rad. an.
0.9152
1.2668
1.3321
1.4081
¹⁸⁸Au 187.96508 8.8m ß⁺,E.C./ 5.3 1^- -0.07 nm rad. an.
0.266
0.3404
0.6061
^189mAu 4.6m ß⁺,E.C. 11/2^- 6.19 nm 0.1667
¹⁸⁹Au 188.96372 28.7m E.C./ 2.9
ß⁺ 1/2⁺ 0.49 nm rad. an.
Pt k x rays
0.4478
0.7133
0.8128
¹⁹⁰Au 189.964685 43m ß⁺/ 4.44
E.C. 1^- -0.07 nm rad. an.
Pt k x rays
0.2958
0.3018
0.5977
^191mAu 0.9s I.T./ 0.2663 11/2^- 6.6 nm Au k x rays
0.2414
0.2526
¹⁹¹Au 190.96363 3.2h E.C./ 1.83 3/2⁺ 0.137 nm Pt k x rays
0.2779
0.2839
0.5864
0.6742
0.08 - 1.3
¹⁹²Au 191.964793 4.9h ß⁺/ 3.52
E.C. 2.19
2.49 1^- 0.009 nm rad. an.
Pt k x rays
0.2959
0.3165
^193mAu 3.9s I.T./ 0.2901 11/2^- 6.2 nm Au k x rays
0.258
¹⁹³Au 192.96405 17.6h E.C./ 1.1 3/2⁺ 0.14 nm Pt k x rays
0.1862
0.2556
¹⁹⁴Au 193.965348 1.64d ß⁺/ 2.49
E.C. 1.49 1^- 0.075 nm rad. an.
Pt k x rays
0.2935
0.3284
^195mAu 30.5s I.T./ 0.3186 11/2^- 6.2 nm 1.4 b Au k x rays
0.2617
¹⁹⁵Au 194.965013 186.12d E.C./ 0.227 3/2⁺ 0.149 nm Pt k x rays
^196mAu 9.7h I.T./ 0.5954 12^- 5.7 nm Au k x rays
0.1478
0.1883
^196mAu 8.1s I.T./ 0.0846 8⁺ 0.0847
¹⁹⁶Au 195.966544 6.18d E.C./ 1.505 2^- 0.591 nm 0.81 b Pt k x rays
^197mAu 7.8s I.T./ 0.4094
ß^-/ 0.686 11/2^- 6 nm 1.4 b Au k x rays
0.1302
0.279
¹⁹⁷Au 100 % 196.966543 98.7 b 3/2⁺ 0.14575 nm 0.55 b
^198mAu 2.3d I.T./ 0.812 12^- Au k x rays
0.0972
0.1803
0.2419
¹⁹⁸Au 197.968217 2.694d ß^-/ 1.373 0.29/ 1
0.961/ 99 2.65x10⁴ b 2^- 0.5934 nm 0.68 b Hg k x rays
0.41179
¹⁹⁹Au 198.96874 3.14d ß^-/ 0.453 0.25/ 22
0.292/ 72
0.462/ 6 30 b 3/2⁺ 0.2715 nm 0.55 b Hg k x rays
0.15837
0.2082
^200mAu 18.7h ß^-/ 1
I.T. 0.56 12^- 5.9 nm Au k x rays
0.1111
0.2559
0.36797
0.4978
0.5793
0.7595
²⁰⁰Au 199.97067 48.4m ß^-/ 2.25 0.7/ 15
2.2/ 77 1^- 0.3679
1.2254
0.3 - 1.6
²⁰¹Au 200.971645 26m ß^-/ 1.28 1.27/ 82 3/2⁺ 0.1674
0.517
0.5426
0.6132
²⁰²Au 201.97384 29s ß^-/ 3 1^- 0.4396
²⁰³Au 202.975145 53s ß^-/ 2.14 1.9 1.9 b 3/2⁺ 0.69
²⁰⁴Au 203.9783 40s ß^-/ 4 2^- 0.4366
1.5113

	Natural Abun. (%)	Atomic Mass	Half- life	Decay Mode /Energy (/MeV)	Part. En. /Intensity (MeV/%)	Cross-sect. Ther. Neut. (b)	Spin (h/2 pi)	Magnetic Dipl.Mom. (nm)	Electric Quad. Mom. (b)	Gamma En. /Intensity (MeV/%)
¹⁷³Au		172.98616	0.06s	alpha
¹⁷⁴Au		173.98462	0.12s	alpha
¹⁷⁵Au		174.98152	0.2s	alpha
¹⁷⁶Au		175.98006	1.2s	ß⁺,E.C./ 10.37 alpha	6.26/ 80 6.29/ 20
¹⁷⁷Au		176.97692	1.3s	alpha	6.115 6.15
¹⁷⁸Au		177.97576	2.6s	alpha	5.92
¹⁷⁹Au		178.97317	7.5s	alpha	5.85
¹⁸⁰Au		179.97231	8.1s	E.C./ 8.6						0.1522 0.2564 0.5242 0.6765 0.8084 0.8597
¹⁸¹Au		180.97013	11.4s	E.C./ 6.4	5.482
¹⁸²Au		181.96958	21s	ß⁺,E.C./ 7.8						rad. an. 0.1549 0.2649 0.13 - 1.4
¹⁸³Au		182.96766	42s	E.C./ 5.5						0.163 0.273 0.3625
¹⁸⁴Au			53s	E.C.,ß⁺/ 7.2
^185mAu			6.8m	ß⁺,E.C.,I.T./ 0.145
¹⁸⁵Au		184.9658	4.3m	ß⁺,E.C./ 4.8			5/2^-	2.17 nm		rad. an.
^186mAu			-2m	ß⁺,E.C.						0.1915
¹⁸⁶Au		185.9661	10.7m	ß⁺,E.C./ 6.2			3^-	-1.26 nm		rad. an. 0.1915 0.2988
^187mAu			2.3s	I.T.			9/2^-
¹⁸⁷Au		186.96446	8.3m	ß⁺,E.C./ 3.9			1/2⁺	0.54 nm		rad. an. 0.9152 1.2668 1.3321 1.4081
¹⁸⁸Au		187.96508	8.8m	ß⁺,E.C./ 5.3			1^-	-0.07 nm		rad. an. 0.266 0.3404 0.6061
^189mAu			4.6m	ß⁺,E.C.			11/2^-	6.19 nm		0.1667
¹⁸⁹Au		188.96372	28.7m	E.C./ 2.9 ß⁺			1/2⁺	0.49 nm		rad. an. Pt k x rays 0.4478 0.7133 0.8128
¹⁹⁰Au		189.964685	43m	ß⁺/ 4.44 E.C.			1^-	-0.07 nm		rad. an. Pt k x rays 0.2958 0.3018 0.5977
^191mAu			0.9s	I.T./ 0.2663			11/2^-	6.6 nm		Au k x rays 0.2414 0.2526
¹⁹¹Au		190.96363	3.2h	E.C./ 1.83			3/2⁺	0.137 nm		Pt k x rays 0.2779 0.2839 0.5864 0.6742 0.08 - 1.3
¹⁹²Au		191.964793	4.9h	ß⁺/ 3.52 E.C.	2.19 2.49		1^-	0.009 nm		rad. an. Pt k x rays 0.2959 0.3165
^193mAu			3.9s	I.T./ 0.2901			11/2^-	6.2 nm		Au k x rays 0.258
¹⁹³Au		192.96405	17.6h	E.C./ 1.1			3/2⁺	0.14 nm		Pt k x rays 0.1862 0.2556
¹⁹⁴Au		193.965348	1.64d	ß⁺/ 2.49 E.C.	1.49		1^-	0.075 nm		rad. an. Pt k x rays 0.2935 0.3284
^195mAu			30.5s	I.T./ 0.3186			11/2^-	6.2 nm	1.4 b	Au k x rays 0.2617
¹⁹⁵Au		194.965013	186.12d	E.C./ 0.227			3/2⁺	0.149 nm		Pt k x rays
^196mAu			9.7h	I.T./ 0.5954			12^-	5.7 nm		Au k x rays 0.1478 0.1883
^196mAu			8.1s	I.T./ 0.0846			8⁺			0.0847
¹⁹⁶Au		195.966544	6.18d	E.C./ 1.505			2^-	0.591 nm	0.81 b	Pt k x rays
^197mAu			7.8s	I.T./ 0.4094 ß^-/ 0.686			11/2^-	6 nm	1.4 b	Au k x rays 0.1302 0.279
¹⁹⁷Au	100 %	196.966543				98.7 b	3/2⁺	0.14575 nm	0.55 b
^198mAu			2.3d	I.T./ 0.812			12^-			Au k x rays 0.0972 0.1803 0.2419
¹⁹⁸Au		197.968217	2.694d	ß^-/ 1.373	0.29/ 1 0.961/ 99	2.65x10⁴ b	2^-	0.5934 nm	0.68 b	Hg k x rays 0.41179
¹⁹⁹Au		198.96874	3.14d	ß^-/ 0.453	0.25/ 22 0.292/ 72 0.462/ 6	30 b	3/2⁺	0.2715 nm	0.55 b	Hg k x rays 0.15837 0.2082
^200mAu			18.7h	ß^-/ 1 I.T.	0.56		12^-	5.9 nm		Au k x rays 0.1111 0.2559 0.36797 0.4978 0.5793 0.7595
²⁰⁰Au		199.97067	48.4m	ß^-/ 2.25	0.7/ 15 2.2/ 77		1^-			0.3679 1.2254 0.3 - 1.6
²⁰¹Au		200.971645	26m	ß^-/ 1.28	1.27/ 82		3/2⁺			0.1674 0.517 0.5426 0.6132
²⁰²Au		201.97384	29s	ß^-/ 3			1^-			0.4396
²⁰³Au		202.975145	53s	ß^-/ 2.14	1.9	1.9 b	3/2⁺			0.69
²⁰⁴Au		203.9783	40s	ß^-/ 4			2^-			0.4366 1.5113