Astatin izotopları

Astatinin (₈₅At), tamamı radyoaktif olan ve kütle numaraları 191 ile 229 arasında değişen 39 bilinen izotopu vardır. Bunların yanı sıra 24 bilinen yarı kararlı uyarılmış hâli mevcuttur. Elementin en uzun yarı ömre sahip izotopu olan ²¹⁰At'nin yarı ömrü 8,1 saatken doğal izotopları arasındaki en uzun yarı ömre sahip olanı ise 56 saniyeyle ²¹⁹At'dir.^[1]^[2]^[3]^[4]

İzotoplar

Nüklit	Tarihî adı	Z	N	İzotop kütlesi (Da)	Yarı ömür	Bozunma türü	Yavru izotop	Spin ve parite
¹⁹¹At	85	106		1,7(+11-5) ms			(1/2+)
^191mAt				2,1(+4-3) ms			(7/2-)
¹⁹²At	85	107	192,00314(28)	11,5(0,6) ms	α (%99,79)	¹⁸⁸Bi	3+#
¹⁹²At	85	107	192,00314(28)	11,5(0,6) ms	β⁺, SF (%0,21)	(various)	3+#
^192mAt	330(90)# keV			88(6) ms	α (%99,79)	^188mBi	(9-, 10-)
^192mAt	330(90)# keV			88(6) ms	β⁺, SF (%0,21)	(various)	(9-, 10-)
¹⁹³At	85	108	192,99984(6)	28(+5-4) ms	α	¹⁸⁹Bi	(1/2+)
^193m1At	50 keV			21(5) ms			(7/2-)
^193m2At	39 keV			27(+4-5) ms			(13/2+)
¹⁹⁴At	85	109	193,99873(20)	286(7) ms	α	¹⁹⁰Bi	(4-, 5-)
¹⁹⁴At	85	109	193,99873(20)	286(7) ms	β⁺ (nadir)	¹⁹⁴Po	(4-, 5-)
^194mAt	480(190) keV			323(7) ms	α	¹⁹⁰Bi	(9-, 10-)
^194mAt	480(190) keV			323(7) ms	İG (nadir)	¹⁹⁴At	(9-, 10-)
¹⁹⁵At	85	110	194,996268(10)	328(20) ms	α (%75)	¹⁹¹Bi	(1/2+)
¹⁹⁵At	85	110	194,996268(10)	328(20) ms	β⁺ (%25)	¹⁹⁵Po	(1/2+)
^195mAt	34(7) keV			147(5) ms			(7/2-)
¹⁹⁶At	85	111	195,99579(6)	253(9) ms	α (%96)	¹⁹²Bi	(3+)
¹⁹⁶At	85	111	195,99579(6)	253(9) ms	β⁺ (%4)	¹⁹⁶Po	(3+)
^196m1At	-30(80) keV			20# ms			(10-)
^196m2At	157,9(1) keV			11 µs			(5+)
¹⁹⁷At	85	112	196,99319(5)	0,390(16) s	α (%96)	¹⁹³Bi	(9/2-)
¹⁹⁷At	85	112	196,99319(5)	0,390(16) s	β⁺ (%4,0)	¹⁹⁷Po	(9/2-)
^197mAt	52(10) keV			2,0(2) s			(1/2+)
¹⁹⁸At	85	113	197,99284(5)	4,2(3) s	α (%94)	¹⁹⁴Bi	(3+)
¹⁹⁸At	85	113	197,99284(5)	4,2(3) s	β⁺ (%6)	¹⁹⁸Po	(3+)
^198mAt	330(90)# keV			1,0(2) s			(10-)
¹⁹⁹At	85	114	198,99053(5)	6,92(13) s	α (%89)	¹⁹⁵Bi	(9/2-)
¹⁹⁹At	85	114	198,99053(5)	6,92(13) s	β⁺ (%11)	¹⁹⁹Po	(9/2-)
²⁰⁰At	85	115	199,990351(26)	43,2(9) s	α (%57)	¹⁹⁶Bi	(3+)
²⁰⁰At	85	115	199,990351(26)	43,2(9) s	β⁺ (%43)	²⁰⁰Po	(3+)
^200m1At	112,7(30) keV			47(1) s	α (%43)	¹⁹⁶Bi	(7+)
					İG	²⁰⁰At
					β⁺	²⁰⁰Po
^200m2At	344(3) keV			3,5(2) s			(10-)
²⁰¹At	85	116	200,988417(9)	85(3) s	α (%71)	¹⁹⁷Bi	(9/2-)
²⁰¹At	85	116	200,988417(9)	85(3) s	β⁺ (%29)	²⁰¹Po	(9/2-)
²⁰²At	85	117	201,98863(3)	184(1) s	β⁺ (%88)	²⁰²Po	(2, 3)+
²⁰²At	85	117	201,98863(3)	184(1) s	α (%12)	¹⁹⁸Bi	(2, 3)+
^202m1At	190(40) keV			182(2) s			(7+)
^202m2At	580(40) keV			460(50) ms			(10-)
²⁰³At	85	118	202,986942(13)	7,37(13) dk	β⁺ (%69)	²⁰³Po	9/2-
²⁰³At	85	118	202,986942(13)	7,37(13) dk	α (%31)	¹⁹⁹Bi	9/2-
²⁰⁴At	85	119	203,987251(26)	9,2(2) dk	β⁺ (%96)	²⁰⁴Po	7+
²⁰⁴At	85	119	203,987251(26)	9,2(2) dk	α (%3,8)	²⁰⁰Bi	7+
^204mAt	587,30(20) keV			108(10) ms	İG	²⁰⁴At	(10-)
²⁰⁵At	85	120	204,986074(16)	26,2(5) dk	β⁺ (%90)	²⁰⁵Po	9/2-
²⁰⁵At	85	120	204,986074(16)	26,2(5) dk	α (%10)	²⁰¹Bi	9/2-
^205mAt	2339,65(23) keV			7,76(14) µs			29/2+
²⁰⁶At	85	121	205,986667(22)	30,6(13) dk	β⁺ (%99,11)	²⁰⁶Po	(5)+
²⁰⁶At	85	121	205,986667(22)	30,6(13) dk	α (%0,9)	²⁰²Bi	(5)+
^206mAt	807(3) keV			410(80) ns			(10)-
²⁰⁷At	85	122	206,985784(23)	1,80(4) h	β⁺ (%91)	²⁰⁷Po	9/2-
²⁰⁷At	85	122	206,985784(23)	1,80(4) h	α (%8,6)	²⁰³Bi	9/2-
²⁰⁸At	85	123	207,986590(28)	1,63(3) h	β⁺ (%99,5)	²⁰⁸Po	6+
²⁰⁸At	85	123	207,986590(28)	1,63(3) h	α (%0,55)	²⁰⁴Bi	6+
²⁰⁹At	85	124	208,986173(8)	5,41(5) h	β⁺ (%96)	²⁰⁹Po	9/2-
²⁰⁹At	85	124	208,986173(8)	5,41(5) h	α (%4)	²⁰⁵Bi	9/2-
²¹⁰At	85	125	209,987148(8)	8,1(4) h	β⁺ (%99,8)	²¹⁰Po	(5)+
²¹⁰At	85	125	209,987148(8)	8,1(4) h	α (%0,18)	²⁰⁶Bi	(5)+
^210m1At	2549,6(2) keV			482(6) µs			(15)-
^210m2At	4027,7(2) keV			5,66(7) µs			(19)+
²¹¹At	85	126	210,9874963(30)	7,214(7) h	EY (%58,2)	²¹¹Po	9/2-
²¹¹At	85	126	210,9874963(30)	7,214(7) h	α (%42)	²⁰⁷Bi	9/2-
²¹²At	85	127	211,990745(8)	0,314(2) s	α (%99,95)	²⁰⁸Bi	(1-)
					β⁺ (%0,05)	²¹²Po
					β^- (%2×10⁻⁶)	²¹²Rn
^212m1At	223(7) keV			0,119(3) s	α (%99)	²⁰⁸Bi	(9-)
^212m1At	223(7) keV			0,119(3) s	İG (%1)	²¹²At	(9-)
^212m2At	4771,6(11) keV			152(5) µs			(25-)
²¹³At	85	128	212,992937(5)	125(6) ns	α	²⁰⁹Bi	9/2-
²¹⁴At	85	129	213,996372(5)	558(10) ns	α	²¹⁰Bi	1-
^214m1At	59(9) keV			265(30) ns
^214m2At	231(6) keV			760(15) ns			9-
²¹⁵At	85	130	214,998653(7)	0,10(2) ms	α	²¹¹Bi	9/2-	Eser^[a]
²¹⁶At	85	131	216,002423(4)	0,30(3) ms	α (%99,99)	²¹²Bi	1-
					β^- (%0,006)	²¹⁶Rn
					EY (%3×10⁻⁷)	²¹⁶Po
^216mAt	413(5) keV			100# µs			(9-)
²¹⁷At	85	132	217,004719(5)	32,3(4) ms	α (%99,98)	²¹³Bi	9/2-	Eser^[b]
²¹⁷At	85	132	217,004719(5)	32,3(4) ms	β^- (%0,012)	²¹⁷Rn	9/2-	Eser^[b]
²¹⁸At	85	133	218,008694(12)	1,5(3) s	α (%99,9)	²¹⁴Bi	1-#	Eser^[c]
²¹⁸At	85	133	218,008694(12)	1,5(3) s	β^- (%0,10)	²¹⁸Rn	1-#	Eser^[c]
²¹⁹At	85	134	219,011162(4)	56(3) s	α (%97)	²¹⁵Bi	(9/2-)	Eser^[a]
²¹⁹At	85	134	219,011162(4)	56(3) s	β^- (%3)	²¹⁹Rn	(9/2-)	Eser^[a]
²²⁰At	85	135	220,01541(6)	3,71(4) dk	β^- (%92)	²²⁰Rn	3(-#)
²²⁰At	85	135	220,01541(6)	3,71(4) dk	α (%8)	²¹⁶Bi	3(-#)
²²¹At	85	136	221,01805(21)#	2,3(2) dk	β^-	²²¹Rn	3/2-#
²²²At	85	137	222,02233(32)#	54(10) s	β^-	²²²Rn
²²³At	85	138	223,02519(43)#	50(7) s	β^-	²²³Rn	3/2-#
²²⁴At	85	139	224,02975(22)#	2,5(1,5) dk	β^-	²²⁴Rn

Notlar

^ ^a ^b ²³⁵U'nın ara bozunma ürünüdür.
^ ²³⁷Np'nin ara bozunma ürünüdür.
^ ²³⁸U'nun ara bozunma ürünüdür.

Kaynakça

^ de Laeter, John Robert; Böhlke, John Karl; De Bièvre, Paul; Hidaka, Hiroshi; Peiser, H. Steffen; Rosman, Kevin J. R.; Taylor, Philip D. P. (2003). "Atomic weights of the elements. Review 2000 (IUPAC Technical Report)". Pure and Applied Chemistry. 75 (6): 683-800. doi:10.1351/pac200375060683.
^ Wieser, Michael E. (2006). "Atomic weights of the elements 2005 (IUPAC Technical Report)". Pure and Applied Chemistry (İngilizce). 78 (11): 2051-2066. doi:10.1351/pac200678112051. Diğer özet.
^ Holden, Norman E. (2004). "11. Table of the Isotopes". Lide, David R. (Ed.). CRC Handbook of Chemistry and Physics (İngilizce) (85.85yer=Boca Raton, Florida bas.). CRC Press. ISBN 978-0-8493-0485-9.
^ Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003). "The NUBASE evaluation of nuclear and decay properties". Nuclear Physics A (İngilizce). 729: 3-128. Bibcode:2003NuPhA.729....3A. doi:10.1016/j.nuclphysa.2003.11.001. 2 Nisan 2015 tarihinde kaynağından arşivlendi. Erişim tarihi: 16 Nisan 2021.

[as-5] ²³⁵U'nın ara bozunma ürünüdür.

[6] ²³⁷Np'nin ara bozunma ürünüdür.

[7] ²³⁸U'nun ara bozunma ürünüdür.

[1] Laeter, John Robert; Böhlke, John Karl; De Bièvre, Paul; Hidaka, Hiroshi; Peiser, H. Steffen; Rosman, Kevin J. R.; Taylor, Philip D. P. (2003). "Atomic weights of the elements. Review 2000 (IUPAC Technical Report)". Pure and Applied Chemistry. 75 (6): 683-800. doi:10.1351/pac200375060683.

[2] Wieser, Michael E. (2006). "Atomic weights of the elements 2005 (IUPAC Technical Report)". Pure and Applied Chemistry (İngilizce). 78 (11): 2051-2066. doi:10.1351/pac200678112051. Diğer özet.

[3] Holden, Norman E. (2004). "11. Table of the Isotopes". Lide, David R. (Ed.). CRC Handbook of Chemistry and Physics (İngilizce) (85.85yer=Boca Raton, Florida bas.). CRC Press. ISBN 978-0-8493-0485-9.

[4] Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003). "The NUBASE evaluation of nuclear and decay properties". Nuclear Physics A (İngilizce). 729: 3-128. Bibcode:2003NuPhA.729....3A. doi:10.1016/j.nuclphysa.2003.11.001. 2 Nisan 2015 tarihinde kaynağından arşivlendi. Erişim tarihi: 16 Nisan 2021.

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