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Isotopes of arsenic

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Isotopes ofarsenic (₃₃As)

Main isotopes^[1]			Decay
	abundance	half-life(t_1/2)	mode	product
⁷³As	synth	80.3 d	ε	⁷³Ge
⁷³As	synth	80.3 d	γ	–
⁷⁴As	synth	17.8 d	ε	⁷⁴Ge
			β⁺	⁷⁴Ge
			γ	–
			β⁻	⁷⁴Se
⁷⁵As	100%	stable

Standard atomic weightA_r°(As)

74.921595±0.000006^[2]
74.922±0.001 (abridged)^[3]

Arsenic (₃₃As) has 32 knownisotopes and at least 10isomers. Only one of these isotopes,⁷⁵As, is stable; as such, it is considered amonoisotopic element. The longest-livedradioisotope is⁷³As with a half-life of 80 days.

List of isotopes

[edit]

Nuclide ^{[n 1]}	Z	N	Isotopic mass(Da)^[4] ^{[n 2]}^{[n 3]}	Half-life^[1]	Decay mode^[1] ^{[n 4]}	Daughter isotope ^{[n 5]}^{[n 6]}	Spin and parity^[1] ^{[n 7]}^{[n 8]}	Isotopic abundance
Nuclide ^{[n 1]}	Excitation energy^{[n 8]}			Half-life^[1]	Decay mode^[1] ^{[n 4]}	Daughter isotope ^{[n 5]}^{[n 6]}	Spin and parity^[1] ^{[n 7]}^{[n 8]}	Isotopic abundance
⁶⁴As	33	31	63.95756(22)#	69.0(14) ms	β⁺	⁶⁴Ge	0+#
⁶⁴As	33	31	63.95756(22)#	69.0(14) ms	β⁺,p?	⁶³Ga	0+#
⁶⁵As	33	32	64.949611(91)	130.3(6) ms	β⁺	⁶⁵Ge	3/2−#
⁶⁵As	33	32	64.949611(91)	130.3(6) ms	β⁺, p?	⁶⁴Ga	3/2−#
⁶⁶As	33	33	65.9441488(61)	95.77(23) ms	β⁺	⁶⁶Ge	0+
^66m1As	1356.63(17) keV			1.14(4) μs	IT	⁶⁶As	5+
^66m2As	3023.(3) keV			7.98(26) μs	IT	⁶⁶As	9+
⁶⁷As	33	34	66.93925111(48)	42.5(12) s	β⁺	⁶⁷Ge	(5/2−)
⁶⁸As	33	35	67.9367741(20)	151.6(8) s	β⁺	⁶⁸Ge	3+
^68mAs	425.1(2) keV			111(20) ns	IT	⁶⁸As	1+
⁶⁹As	33	36	68.932246(34)	15.2(2) min	β⁺	⁶⁹Ge	5/2−
⁷⁰As	33	37	69.9309346(15)	52.6(3) min	β⁺	⁷⁰Ge	4+
^70mAs	32.046(23) keV			96(3) μs	IT	⁷⁰As	2+
⁷¹As	33	38	70.9271136(45)	65.30(7) h	β⁺	⁷¹Ge	5/2−
⁷²As	33	39	71.9267523(44)	26.0(1) h	β⁺	⁷²Ge	2−
⁷³As	33	40	72.9238291(41)	80.30(6) d	EC	⁷³Ge	3/2−
^73mAs	427.902(21) keV			5.7(2) μs	IT	⁷³As	9/2+
⁷⁴As	33	41	73.9239286(18)	17.77(2) d	β⁺ (66%)	⁷⁴Ge	2−
⁷⁴As	33	41	73.9239286(18)	17.77(2) d	β⁻ (34%)	⁷⁴Se	2−
⁷⁵As	33	42	74.92159456(95)	Stable			3/2−	1.0000
^75mAs	303.9243(8) keV			17.62(23) ms	IT	⁷⁵As	9/2+
⁷⁶As	33	43	75.92239201(95)	1.0933(38) d	β⁻	⁷⁶Se	2−
^76mAs	44.425(1) keV			1.84(6) μs	IT	⁷⁶As	(1)+
⁷⁷As	33	44	76.9206476(18)	38.79(5) h	β⁻	⁷⁷Se	3/2−
^77mAs	475.48(4) keV			114.0(25) μs	IT	⁷⁷As	9/2+
⁷⁸As	33	45	77.921828(10)	90.7(2) min	β⁻	⁷⁸Se	2−
⁷⁹As	33	46	78.9209484(57)	9.01(15) min	β⁻	⁷⁹Se	3/2−
^79mAs	772.81(6) keV			1.21(1) μs	IT	⁷⁹As	(9/2)+
⁸⁰As	33	47	79.9224744(36)	15.2(2) s	β⁻	⁸⁰Se	1+
⁸¹As	33	48	80.9221323(28)	33.3(8) s	β⁻	⁸¹Se	3/2−
⁸²As	33	49	81.9247387(40)	19.1(5) s	β⁻	⁸²Se	(2−)
^82mAs	131.6(5) keV			13.6(4) s	β⁻	⁸²Se	(5-)
⁸³As	33	50	82.9252069(30)	13.4(4) s	β⁻	⁸³Se	5/2−#
⁸⁴As	33	51	83.9293033(34)	3.16(58) s	β⁻ (99.72%)	⁸⁴Se	(2−)
⁸⁴As	33	51	83.9293033(34)	3.16(58) s	β⁻,n (.28%)	⁸³Se	(2−)
⁸⁵As	33	52	84.9321637(33)	2.022(7) s	β⁻, n (62.6%)	⁸⁴Se	(5/2−)
⁸⁵As	33	52	84.9321637(33)	2.022(7) s	β⁻ (37.4%)	⁸⁵Se	(5/2−)
⁸⁶As	33	53	85.9367015(37)	945(8) ms	β⁻ (64.5%)	⁸⁶Se	(1−,2−)
					β⁻, n (35.5%)	⁸⁵Se
					β⁻, 2n?	⁸⁴Se
⁸⁷As	33	54	86.9402917(32)	492(25) ms	β⁻ (84.6%)	⁸⁷Se	(5/2−,3/2−)
					β⁻, n (15.4%)	⁸⁶Se
					β⁻, 2n?	⁸⁵Se
⁸⁸As	33	55	87.94584(22)#	270(150) ms	β⁻	⁸⁸Se
⁸⁸As	33	55	87.94584(22)#	270(150) ms	β⁻, n?	⁸⁷Se
⁸⁹As	33	56	88.95005(32)#	220# ms [>150 ns]	β⁻?	⁸⁹Se	5/2−#
					β⁻, n?	⁸⁸Se
					β⁻, 2n?	⁸⁷Se
⁹⁰As	33	57	89.95600(43)#	70# ms [>300 ns]	β⁻?	⁹⁰Se
					β⁻, n?	⁸⁹Se
					β⁻, 2n?	⁸⁸Se
^90mAs	124.5(5) keV			220(100) ns	IT	⁹⁰As
⁹¹As	33	58	90.96082(43)#	100# ms [>300 ns]	β⁻?	⁹¹Se	5/2−#
					β⁻, n?	⁹⁰Se
					β⁻, 2n?	⁸⁹Se
⁹²As	33	59	91.96739(54)#	45# ms [>300 ns]	β⁻?	⁹²Se
					β⁻, n?	⁹¹Se
					β⁻, 2n?	⁹⁰Se
⁹³As^[5]	33	60
⁹⁴As^[5]	33	61
⁹⁵As^[5]	33	62
This table header & footer: view

^^mAs – Excitednuclear isomer.
^( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
^# – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
^Modes of decay:
EC: Electron capture

n: Neutron emission
p: Proton emission
^Bold italics symbol as daughter – Daughter product is nearly stable.
^Bold symbol as daughter – Daughter product is stable.
^( ) spin value – Indicates spin with weak assignment arguments.
^^a ^b# – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).

References

[edit]

^^a ^b ^c ^dKondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021)."The NUBASE2020 evaluation of nuclear properties"(PDF).Chinese Physics C.45 (3): 030001.doi:10.1088/1674-1137/abddae.
^"Standard Atomic Weights: Arsenic".CIAAW. 2013.
^Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04)."Standard atomic weights of the elements 2021 (IUPAC Technical Report)".Pure and Applied Chemistry.doi:10.1515/pac-2019-0603.ISSN 1365-3075.
^Wang, Meng; Huang, W.J.; Kondev, F.G.; Audi, G.; Naimi, S. (2021). "The AME 2020 atomic mass evaluation (II). Tables, graphs and references*".Chinese Physics C.45 (3): 030003.doi:10.1088/1674-1137/abddaf.
^^a ^b ^cShimizu, Y.; Kubo, T.; Sumikama, T.; Fukuda, N.; Takeda, H.; Suzuki, H.; Ahn, D. S.; Inabe, N.; Kusaka, K.; Ohtake, M.; Yanagisawa, Y.; Yoshida, K.; Ichikawa, Y.; Isobe, T.; Otsu, H.; Sato, H.; Sonoda, T.; Murai, D.; Iwasa, N.; Imai, N.; Hirayama, Y.; Jeong, S. C.; Kimura, S.; Miyatake, H.; Mukai, M.; Kim, D. G.; Kim, E.; Yagi, A. (8 April 2024). "Production of new neutron-rich isotopes near the N = 60 isotones Ge 92 and As 93 by in-flight fission of a 345 MeV/nucleon U 238 beam".Physical Review C.109 (4).doi:10.1103/PhysRevC.109.044313.

Isotope masses from:
- Audi, Georges; Bersillon, Olivier; Blachot, Jean;Wapstra, Aaldert Hendrik (2003),"The NUBASE evaluation of nuclear and decay properties",Nuclear Physics A,729:3–128,Bibcode:2003NuPhA.729....3A,doi:10.1016/j.nuclphysa.2003.11.001
Half-life, spin, and isomer data selected from the following sources.
- Audi, Georges; Bersillon, Olivier; Blachot, Jean;Wapstra, Aaldert Hendrik (2003),"The NUBASE evaluation of nuclear and decay properties",Nuclear Physics A,729:3–128,Bibcode:2003NuPhA.729....3A,doi:10.1016/j.nuclphysa.2003.11.001
- National Nuclear Data Center."NuDat 2.x database".Brookhaven National Laboratory.
- Holden, Norman E. (2004). "11. Table of the Isotopes". In Lide, David R. (ed.).CRC Handbook of Chemistry and Physics (85th ed.).Boca Raton, Florida:CRC Press.ISBN 978-0-8493-0485-9.
A.Shore, A. Fritsch, M. Heim, A. Schuh, M. Thoennessen.Discovery of the Arsenic Isotopes.arXiv:0902.4361.

Isotopes of thechemical elements

Group	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
Period	Hydrogen and alkali metals	Alkaline earth metals													Pnictogens	Chalcogens	Halogens	Noble gases
①	Isotopes § List H 1																	Isotopes § List He 2
②	Isotopes § List Li 3	Isotopes § List Be 4											Isotopes § List B 5	Isotopes § List C 6	Isotopes § List N 7	Isotopes § List O 8	Isotopes § List F 9	Isotopes § List Ne 10
③	Isotopes § List Na 11	Isotopes § List Mg 12											Isotopes § List Al 13	Isotopes § List Si 14	Isotopes § List P 15	Isotopes § List S 16	Isotopes § List Cl 17	Isotopes § List Ar 18
④	Isotopes § List K 19	Isotopes § List Ca 20	Isotopes § List Sc 21	Isotopes § List Ti 22	Isotopes § List V 23	Isotopes § List Cr 24	Isotopes § List Mn 25	Isotopes § List Fe 26	Isotopes § List Co 27	Isotopes § List Ni 28	Isotopes § List Cu 29	Isotopes § List Zn 30	Isotopes § List Ga 31	Isotopes § List Ge 32	Isotopes § List As 33	Isotopes § List Se 34	Isotopes § List Br 35	Isotopes § List Kr 36
⑤	Isotopes § List Rb 37	Isotopes § List Sr 38	Isotopes § List Y 39	Isotopes § List Zr 40	Isotopes § List Nb 41	Isotopes § List Mo 42	Isotopes § List Tc 43	Isotopes § List Ru 44	Isotopes § List Rh 45	Isotopes § List Pd 46	Isotopes § List Ag 47	Isotopes § List Cd 48	Isotopes § List In 49	Isotopes § List Sn 50	Isotopes § List Sb 51	Isotopes § List Te 52	Isotopes § List I 53	Isotopes § List Xe 54
⑥	Isotopes § List Cs 55	Isotopes § List Ba 56	Isotopes § List Lu 71	Isotopes § List Hf 72	Isotopes § List Ta 73	Isotopes § List W 74	Isotopes § List Re 75	Isotopes § List Os 76	Isotopes § List Ir 77	Isotopes § List Pt 78	Isotopes § List Au 79	Isotopes § List Hg 80	Isotopes § List Tl 81	Isotopes § List Pb 82	Isotopes § List Bi 83	Isotopes § List Po 84	Isotopes § List At 85	Isotopes § List Rn 86
⑦	Isotopes § List Fr 87	Isotopes § List Ra 88	Isotopes § List Lr 103	Isotopes § List Rf 104	Isotopes § List Db 105	Isotopes § List Sg 106	Isotopes § List Bh 107	Isotopes § List Hs 108	Isotopes § List Mt 109	Isotopes § List Ds 110	Isotopes § List Rg 111	Isotopes § List Cn 112	Isotopes § List Nh 113	Isotopes § List Fl 114	Isotopes § List Mc 115	Isotopes § List Lv 116	Isotopes § List Ts 117	Isotopes § List Og 118
⑧	Isotopes § List Uue 119	Isotopes § List Ubn 120

			Isotopes § List La 57	Isotopes § List Ce 58	Isotopes § List Pr 59	Isotopes § List Nd 60	Isotopes § List Pm 61	Isotopes § List Sm 62	Isotopes § List Eu 63	Isotopes § List Gd 64	Isotopes § List Tb 65	Isotopes § List Dy 66	Isotopes § List Ho 67	Isotopes § List Er 68	Isotopes § List Tm 69	Isotopes § List Yb 70
			Isotopes § List Ac 89	Isotopes § List Th 90	Isotopes § List Pa 91	Isotopes § List U 92	Isotopes § List Np 93	Isotopes § List Pu 94	Isotopes § List Am 95	Isotopes § List Cm 96	Isotopes § List Bk 97	Isotopes § List Cf 98	Isotopes § List Es 99	Isotopes § List Fm 100	Isotopes § List Md 101	Isotopes § List No 102

Authority control databases: National	Germany

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