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Isotopes of silver (₄₇Ag)

Main isotopes[1] Decay abun­dance half-life (t1/2) mode pro­duct 105Ag synth 41.3 d ε 105Pd γ – 106mAg synth 8.28 d ε 106Pd γ – 107Ag 51.8% stable 108mAg synth 439 y ε 108Pd IT 108Ag γ – 109Ag 48.2% stable 110m2Ag synth 249.86 d β− 110Cd γ – 111Ag synth 7.43 d β− 111Cd γ –
Standard atomic weight Ar°(Ag)
	107.8682±0.0002[2] 107.87±0.01 (abridged)[3]
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Naturally occurring silver (₄₇Ag) is composed of the two stable isotopes ¹⁰⁷Ag and ¹⁰⁹Ag in almost equal proportions, with ¹⁰⁷Ag being slightly more abundant (51.839% natural abundance). Notably, silver is the only element with all stable istopes having nuclear spins of 1/2. Thus both ¹⁰⁷Ag and ¹⁰⁹Ag nuclei produce narrow lines in nuclear magnetic resonance spectra.^[4]

40 radioisotopes have been characterized with the most stable being ¹⁰⁵Ag with a half-life of 41.29 days, ¹¹¹Ag with a half-life of 7.43 days, and ¹¹²Ag with a half-life of 3.13 hours.

All of the remaining radioactive isotopes have half-lives that are less than an hour, and the majority of these have half-lives that are less than 3 minutes. This element has numerous meta states, with the most stable being ^108mAg (half-life 439 years), ^110mAg (half-life 249.86 days) and ^106mAg (half-life 8.28 days).

Isotopes of silver range in atomic weight from 91.960 u (⁹²Ag) to 132.969 u (¹³³Ag). The primary decay mode before the most abundant stable isotope, ¹⁰⁷Ag, is electron capture and the primary mode after is beta decay. The primary decay products before ¹⁰⁷Ag are palladium (element 46) isotopes and the primary products after are cadmium (element 48) isotopes.

The palladium isotope ¹⁰⁷Pd decays by beta emission to ¹⁰⁷Ag with a half-life of 6.5 million years. Iron meteorites are the only objects with a high enough palladium/silver ratio to yield measurable variations in ¹⁰⁷Ag abundance. Radiogenic ¹⁰⁷Ag was first discovered in the Santa Clara meteorite in 1978.

The discoverers suggest that the coalescence and differentiation of iron-cored small planets may have occurred 10 million years after a nucleosynthetic event. ¹⁰⁷Pd versus ¹⁰⁷Ag correlations observed in bodies, which have clearly been melted since the accretion of the Solar System, must reflect the presence of live short-lived nuclides in the early Solar System.

List of isotopes

Zdroj:https://en.wikipedia.org?pojem=Silver-110m
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Nuclide [n 1]	Z	N	Isotopic mass (Da)[5] [n 2][n 3]	Half-life[1] [n 4]	Decay mode[1] [n 5]	Daughter isotope [n 6][n 7]	Spin and parity[1] [n 8][n 4]	Natural abundance (mole fraction)
	Excitation energy[n 4]							Normal proportion[1]	Range of variation
92Ag	47	45	91.95971(43)#	1# ms	β+	92Pd
					p	91Pd
93Ag	47	46	92.95019(43)#	228(16) ns	β+	93Pd	9/2+#
					p	92Pd
					β+, p	92Rh
94Ag	47	47	93.94374(43)#	27(2) ms	β+ (>99.8%)	94Pd	0+#
					β+, p (<0.2%)	93Rh
94m1Ag	1350(400)# keV			470(10) ms	β+ (83%)	94Pd	(7+)
					β+, p (17%)	93Rh
94m2Ag	6500(550)# keV			400(40) ms	β+ (~68.4%)	94Pd	(21+)
					β+, p (~27%)	93Rh
					p (4.1%)	93Pd
					2p (0.5%)	92Rh
95Ag	47	48	94.93569(43)#	1.78(6) s	β+ (97.7%)	95Pd	(9/2+)
					β+, p (2.3%)	94Rh
95m1Ag	344.2(3) keV			<0.5 s	IT	95Ag	(1/2−)
95m2Ag	2531.3(15) keV			<16 ms	IT	95Ag	(23/2+)
95m3Ag	4860.0(15) keV			<40 ms	IT	95Ag	(37/2+)
96Ag	47	49	95.93074(10)	4.45(3) s	β+ (95.8%)	96Pd	(8+)
					β+, p (4.2%)	95Rh
96m1Ag	0(50)# keV			6.9(5) s	β+ (85.1%)	96Pd	(2+)
					β+, p (14.9%)	95Rh
96m2Ag	2461.4(3) keV			103.2(45) μs	IT	96Ag	(13-)
96m3Ag	2686.7(4) keV			1.561(16) μs	IT	96Ag	(15+)
96m4Ag	6951.8(14) keV			132(17) ns	IT	96Ag	(19+)
97Ag	47	50	96.923881(13)	25.5(3) s	β+	97Pd	(9/2+)
97mAg	620(40) keV			100# ms			(1/2-#)
98Ag	47	51	97.92156(4)	47.5(3) s	β+ (99.99%)	98Pd	(6)+
					β+, p (.0012%)	97Rh
98mAg	107.28(10) keV			161(7) ns	IT	98Ag	(4+)
99Ag	47	52	98.917646(7)	2.07(5) min	β+	99Pd	(9/2)+
99mAg	506.2(4) keV			10.5(5) s	IT	99Ag	(1/2−)
100Ag	47	53	99.916115(5)	2.01(9) min	β+	100Pd	(5)+
100mAg	15.52(16) keV			2.24(13) min	IT	100Ag	(2)+
					β+	100Pd
101Ag	47	54	100.912684(5)	11.1(3) min	β+	101Pd	9/2+
101mAg	274.1(3) keV			3.10(10) s	IT	101Ag	1/2−
102Ag	47	55	101.911705(9)	12.9(3) min	β+	102Pd	5+
102mAg	9.40(7) keV			7.7(5) min	β+ (51%)	102Pd	2+
					IT (49%)	102Ag
103Ag	47	56	102.908961(4)	65.7(7) min	β+	103Pd	7/2+
103mAg	134.45(4) keV			5.7(3) s	IT	103Ag	1/2−
104Ag	47	57	103.908624(5)	69.2(10) min	β+	104Pd	5+
104mAg	6.90(22) keV			33.5(20) min	β+ (>99.93%)	104Pd	2+
					IT (<0.07%)	104Ag
105Ag	47	58	104.906526(5)	41.29(7) d	β+	105Pd	1/2−
105mAg	25.468(16) keV			7.23(16) min	IT (99.66%)	105Ag	7/2+
					β+ (.34%)	105Pd
106Ag	47	59	105.906663(3)	23.96(4) min	β+	106Pd	1+
					β− (rare)	106Cd
106mAg	89.66(7) keV			8.28(2) d	β+	106Pd	6+
					IT (rare)	106Ag