아스타틴 동위 원소

**아스타틴**은 안정 동위 원소 없이 오직 방사성 동위 원소로만 구성되어 있으며, 원자량 191에서 229 사이에 32가지의 동위 원소url-status=dead와 23가지의 이성질핵이 알려져 있다. 이들 중 가장 안정한 것은 210At로 반감기는 약 8.1시간이며, 주로 양전자 방출을 통해 210Po으로 붕괴한다. 자연에 존재하는 붕괴 계열 상의 가장 안정한 동위 원소는 219At로, 반감기는 56초이다.
# 표
{| class="wikitable" | 핵종
기호 ! Z(p) ! N(n) !
동위 원소 질량 (u)
! rowspan="2" | 반감기 ! rowspan="2" | 붕괴
방식url-status=약자:
ε: 전자 포획
IT: 이성질핵 전이 ! rowspan="2" | 붕괴
생성물 ! rowspan="2" | 핵
스핀 ! rowspan="2" | 전형적
동위 원소
구성비
(몰 분율) ! rowspan="2" | 자연적
구성비
변동 범위
(몰 분율) |- ! colspan="3" | 들뜬 에너지 |- | 191At | | 85 | | 106 | | 1.7(+11-5) ms | | | (1/2+) | | |- | | 191mAt | colspan="3" | | 2.1(+4-3) ms | | | (7/2-) | | |- | 193At | | 85 | | 108 | 192.99984(6) | 28(+5-4) ms | α | 189Bi | (1/2+) | | |- | | 193m1At | colspan="3" | 50 keV | 21(5) ms | | | (7/2-) | | |- | | 193m2At | colspan="3" | 39 keV | 27(+4-5) ms | | | (13/2+) | | |- | rowspan=2|194At | rowspan=2 | 85 | rowspan=2 | 109 | rowspan=2|193.99873(20) | rowspan=2|~40 ms | α | 190Bi | rowspan=2|3+# | rowspan=2| | rowspan=2| |- | β+ (드묾) | 194Po |- | rowspan=2 | 194mAt | rowspan=2 colspan="3" | 480(190) keV | rowspan=2|~250 ms | α | 190Bi | rowspan=2|10-# | rowspan=2| | rowspan=2| |- | IT (드묾) | 194At |- | rowspan=2|195At | rowspan=2 | 85 | rowspan=2 | 110 | rowspan=2|194.996268(10) | rowspan=2|328(20) ms | α (75%) | 191Bi | rowspan=2|(1/2+) | rowspan=2| | rowspan=2| |- | β+ (25%) | 195Po |- | | 195mAt | colspan="3" | 34(7) keV | 147(5) ms | | | 9/2-# | | |- | rowspan=2|196At | rowspan=2 | 85 | rowspan=2 | 111 | rowspan=2|195.99579(6) | rowspan=2|253(9) ms | α (96%) | 192Bi | rowspan=2|3+# | rowspan=2| | rowspan=2| |- | β+ (4.0%) | 196Po |- | | 196m1At | colspan="3" | -30(80) keV | 20# ms | | | 10-# | | |- | | 196m2At | colspan="3" | 157.9(1) keV | 11 µs | | | 5+# | | |- | rowspan=2|197At | rowspan=2 | 85 | rowspan=2 | 112 | rowspan=2|196.99319(5) | rowspan=2|0.390(16) s | α (96%) | 193Bi | rowspan=2|(9/2-) | rowspan=2| | rowspan=2| |- | β+ (4.0%) | 197Po |- | | 197mAt | colspan="3" | 52(10) keV | 2.0(2) s | | | (1/2+) | | |- | rowspan=2|198At | rowspan=2 | 85 | rowspan=2 | 113 | rowspan=2|197.99284(5) | rowspan=2|4.2(3) s | α (94%) | 194Bi | rowspan=2|(3+) | rowspan=2| | rowspan=2| |- | β+ (6%) | 198Po |- | | 198mAt | colspan="3" | 330(90)# keV | 1.0(2) s | | | (10-) | | |- | rowspan=2|199At | rowspan=2 | 85 | rowspan=2 | 114 | rowspan=2|198.99053(5) | rowspan=2|6.92(13) s | α (89%) | 195Bi | rowspan=2|(9/2-) | rowspan=2| | rowspan=2| |- | β+ (11%) | 199Po |- | rowspan=2|200At | rowspan=2 | 85 | rowspan=2 | 115 | rowspan=2|199.990351(26) | rowspan=2|43.2(9) s | α (57%) | 196Bi | rowspan=2|(3+) | rowspan=2| | rowspan=2| |- | β+ (43%) | 200Po |- | rowspan=3 | 200m1At | rowspan=3 colspan="3" | 112.7(30) keV | rowspan=3|47(1) s | α (43%) | 196Bi | rowspan=3|(7+) | rowspan=3| | rowspan=3| |- | IT | 200At |- | β+ | 200Po |- | | 200m2At | colspan="3" | 344(3) keV | 3.5(2) s | | | (10-) | | |- | rowspan=2|201At | rowspan=2 | 85 | rowspan=2 | 116 | rowspan=2|200.988417(9) | rowspan=2|85(3) s | α (71%) | 197Bi | rowspan=2|(9/2-) | rowspan=2| | rowspan=2| |- | β+ (29%) | 201Po |- | rowspan=2|202At | rowspan=2 | 85 | rowspan=2 | 117 | rowspan=2|201.98863(3) | rowspan=2|184(1) s | β+ (88%) | 202Po | rowspan=2|(2,3)+ | rowspan=2| | rowspan=2| |- | α (12%) | 198Bi |- | | 202m1At | colspan="3" | 190(40) keV | 182(2) s | | | (7+) | | |- | | 202m2At | colspan="3" | 580(40) keV | 460(50) ms | | | (10-) | | |- | rowspan=2|203At | rowspan=2 | 85 | rowspan=2 | 118 | rowspan=2|202.986942(13) | rowspan=2|7.37(13) min | β+ (69%) | 203Po | rowspan=2|9/2- | rowspan=2| | rowspan=2| |- | α (31%) | 199Bi |- | rowspan=2|204At | rowspan=2 | 85 | rowspan=2 | 119 | rowspan=2|203.987251(26) | rowspan=2|9.2(2) min | β+ (96%) | 204Po | rowspan=2|7+ | rowspan=2| | rowspan=2| |- | α (3.8%) | 200Bi |- | | 204mAt | colspan="3" | 587.30(20) keV | 108(10) ms | IT | 204At | (10-) | | |- | rowspan=2|205At | rowspan=2 | 85 | rowspan=2 | 120 | rowspan=2|204.986074(16) | rowspan=2|26.2(5) min | β+ (90%) | 205Po | rowspan=2|9/2- | rowspan=2| | rowspan=2| |- | α (10%) | 201Bi |- | | 205mAt | colspan="3" | 2339.65(23) keV | 7.76(14) µs | | | 29/2+ | | |- | rowspan=2|206At | rowspan=2 | 85 | rowspan=2 | 121 | rowspan=2|205.986667(22) | rowspan=2|30.6(13) min | β+ (99.11%) | 206Po | rowspan=2|(5)+ | rowspan=2| | rowspan=2| |- | α (0.9%) | 202Bi |- | | 206mAt | colspan="3" | 807(3) keV | 410(80) ns | | | (10)- | | |- | rowspan=2|207At | rowspan=2 | 85 | rowspan=2 | 122 | rowspan=2|206.985784(23) | rowspan=2|1.80(4) h | β+ (91%) | 207Po | rowspan=2|9/2- | rowspan=2| | rowspan=2| |- | α (8.6%) | 203Bi |- | rowspan=2|208At | rowspan=2 | 85 | rowspan=2 | 123 | rowspan=2|207.986590(28) | rowspan=2|1.63(3) h | β+ (99.5%) | 208Po | rowspan=2|6+ | rowspan=2| | rowspan=2| |- | α (0.55%) | 204Bi |- | rowspan=2|209At | rowspan=2 | 85 | rowspan=2 | 124 | rowspan=2|208.986173(8) | rowspan=2|5.41(5) h | β+ (96%) | 209Po | rowspan=2|9/2- | rowspan=2| | rowspan=2| |- | α (4.0%) | 205Bi |- | rowspan=2|210At | rowspan=2 | 85 | rowspan=2 | 125 | rowspan=2|209.987148(8) | rowspan=2|8.1(4) h | β+ (99.8%) | 210Po | rowspan=2|(5)+ | rowspan=2| | rowspan=2| |- | α (0.18%) | 206Bi |- | | 210m1At | colspan="3" | 2549.6(2) keV | 482(6) µs | | | (15)- | | |- | | 210m2At | colspan="3" | 4027.7(2) keV | 5.66(7) µs | | | (19)+ | | |- | rowspan=2|211At | rowspan=2 | 85 | rowspan=2 | 126 | rowspan=2|210.9874963(30) | rowspan=2|7.214(7) h | ε (58.2%) | 211Po | rowspan=2|9/2- | rowspan=2| | rowspan=2| |- | α (42%) | 207Bi |- | rowspan=3|212At | rowspan=3 | 85 | rowspan=3 | 127 | rowspan=3|211.990745(8) | rowspan=3|0.314(2) s | α (99.95%) | 208Bi | rowspan=3|(1-) | rowspan=3| | rowspan=3| |- | β+ (0.05%) | 212Po |- | β- (2×10−6%) | 212Rn |- | rowspan=2 | 212m1At | rowspan=2 colspan="3" | 223(7) keV | rowspan=2|0.119(3) s | α (99%) | 208Bi | rowspan=2|(9-) | rowspan=2| | rowspan=2| |- | IT (1%) | 212At |- | | 212m2At | colspan="3" | 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 | colspan="3" | 59(9) keV | 265(30) ns | | | | | |- | | 214m2At | colspan="3" | 231(6) keV | 760(15) ns | | | 9- | | |- | 215At | | 85 | | 130 | 214.998653(7) | 0.10(2) ms | α | 211Bi | 9/2- | 미량235U의 중간 붕괴 생성물 | |- | rowspan=3|216At | rowspan=3 | 85 | rowspan=3 | 131 | rowspan=3|216.002423(4) | rowspan=3|0.30(3) ms | α (99.99%) | 212Bi | rowspan=3|1- | rowspan=3| | rowspan=3| |- | β- (0.006%) | 216Rn |- | ε (3×10−7%) | 216Po |- | | 216mAt | colspan="3" | 413(5) keV | 100# µs | | | (9-) | | |- | rowspan=2|217At | rowspan=2 | 85 | rowspan=2 | 132 | rowspan=2|217.004719(5) | rowspan=2|32.3(4) ms | α (99.98%) | 213Bi | rowspan=2|9/2- | rowspan=2| | rowspan=2| |- | β- (0.012%) | 217Rn |- | rowspan=2|218At | rowspan=2 | 85 | rowspan=2 | 133 | rowspan=2|218.008694(12) | rowspan=2|1.5(3) s | α (99.9%) | 214Bi | rowspan=2|1-# | rowspan=2|미량238U의 중간 붕괴 생성물 | rowspan=2| |- | β- (0.10%) | 218Rn |- | rowspan=2|219At | rowspan=2 | 85 | rowspan=2 | 134 | rowspan=2|219.011162(4) | rowspan=2|56(3) s | α (97%) | 215Bi | rowspan=2|5/2-# | rowspan=2|미량 | rowspan=2| |- | β- (3.0%) | 219Rn |- | rowspan=2|220At | rowspan=2 | 85 | rowspan=2 | 135 | rowspan=2|220.01541(6) | rowspan=2|3.71(4) min | β- (92%) | 220Rn | rowspan=2|3(-#) | rowspan=2| | rowspan=2| |- | α (8.0%) | 216Bi |- | 221At | | 85 | | 136 | 221.01805(21)# | 2.3(2) min | β- | 221Rn | 3/2-# | | |- | 222At | | 85 | | 137 | 222.02233(32)# | 54(10) s | β- | 222Rn | | | |- | 223At | | 85 | | 138 | 223.02519(43)# | 50(7) s | | | 3/2-# | | |}