자연계에 존재하는 안티모니의 안정 동위 원소는 2종이며 121Sb와 123Sb가 존재한다. 125Sb는 반감기가 2.75856년으로 안티모니의 인공 방사성 동위 원소들 중 반감기가 가장 길다. 핵자수 Z(p) N(n) 동위 원소 질량 (u) 반감기 붕괴방식IT 이성질핵 전이 붕괴 생성동위 원소 핵스핀 자연계에 존재하는동위 원소범위(몰 분율) 자연계에 존재하는최대 범위(몰 분율) 들뜬 에너지 103Sb 51 52 102.93969(32)# 100# ms >1.5 µs β+ 103Sn 5/2+# 104Sb 51 53 103.93647(39)# 0.47(13) s0.44(+15-11) s β+ (86%) 104Sn p (7%) 103Sn β+, p (7%) 103In α (100In 105Sb 51 54 104.93149(11) 1.12(16) s β+ (99%) 105Sn (5/2+) p (1%) 104Sn β+, p (104In 106Sb 51 55 105.92879(34)# 0.6(2) s β+ 106Sn (4+) 106mSb 1000(500)# keV 220(20) ns 107Sb 51 56 106.92415(32)# 4.0(2) s β+ 107Sn 5/2+# 108Sb 51 57 107.92216(22)# 7.4(3) s β+ 108Sn (4+) β+, p (극히 드묾) 107In 109Sb 51 58 108.918132(20) 17.3(5) s β+ 109Sn 5/2+# 110Sb 51 59 109.91675(22)# 23.0(4) s β+ 110Sn (4+) 111Sb 51 60 110.91316(3) 75(1) s β+ 111Sn (5/2+) 112Sb 51 61 111.912398(19) 51.4(10) s β+ 112Sn 3+ 113Sb 51 62 112.909372(19) 6.67(7) min β+ 113Sn 5/2+ 114Sb 51 63 113.90927(3) 3.49(3) min β+ 114Sn (3+) 114mSb 495.5(7) keV 219(12) µs (8-) 115Sb 51 64 114.906598(17) 32.1(3) min β+ 115Sn 5/2+ 116Sb 51 65 115.906794(6) 15.8(8) min β+ 116Sn 3+ 116m1Sb 93.99(5) keV 194(4) ns 1+ 116m2Sb 380(40) keV 60.3(6) min β+ 116Sn 8- 117Sb 51 66 116.904836(10) 2.80(1) h β+ 117Sn 5/2+ 118Sb 51 67 117.905529(4) 3.6(1) min β+ 118Sn 1+ 118m1Sb 50.814(21) keV 20.6(6) µs (3)+ 118m2Sb 250(6) keV 5.00(2) h β+ 118Sn 8- 119Sb 51 68 118.903942(9) 38.19(22) h ε 119Sn 5/2+ 119m1Sb 2553.6(3) keV 130(3) ns (19/2-) 119m2Sb 2852(7) keV 850(90) ms IT 119Sb 27/2+# 120Sb 51 69 119.905072(8) 15.89(4) min β+ 120Sn 1+ 120m1Sb 0(100)# keV 5.76(2) d β+ 120Sn 8- 120m2Sb 78.16(5) keV 246(2) ns (3+) 120m3Sb 2328.3(6) keV 400(8) ns (6) 121Sb 51 70 120.9038157(24) 안정 5/2+ 0.5721(5) 122Sb 51 71 121.9051737(24) 2.7238(2) d β- (97.59%) 122Te 2- β+ (2.41%) 122Sn 122m1Sb 61.4131(5) keV 1.86(8) µs 3+ 122m2Sb 137.4726(8) keV 0.53(3) ms (5)+ 122m3Sb 163.5591(17) keV 4.191(3) min IT 122Sb (8)- 123Sb 51 72 122.9042140(22) 안정 7/2+ 0.4279(5) 124Sb 51 73 123.9059357(22) 60.20(3) d β- 124Te 3- 124m1Sb 10.8627(8) keV 93(5) s IT (75%) 124Sb 5+ β- (25%) 124Te 124m2Sb 36.8440(14) keV 20.2(2) min (8)- 124m3Sb 40.8038(7) keV 3.2(3) µs (3+,4+) 125Sb 51 74 124.9052538(28) 2.75856(25) a β- 125mTe 7/2+ 126Sb 51 75 125.90725(3) 12.35(6) d β- 126Te (8-) 126m1Sb 17.7(3) keV 19.15(8) min β- (86%) 126Te (5+) IT (14%) 126Sb 126m2Sb 40.4(3) keV ~11 s IT 126m1Sb (3-) 126m3Sb 104.6(3) keV 553(5) ns (3+) 127Sb 51 76 126.906924(6) 3.85(5) d β- 127mTe 7/2+ 128Sb 51 77 127.909169(27) 9.01(4) h β- 128Te 8- 128mSb 10(7) keV 10.4(2) min β- (96.4%) 128Te 5+ IT (3.6%) 128Sb 129Sb 51 78 128.909148(23) 4.40(1) h β- 129mTe 7/2+ 129m1Sb 1851.05(10) keV 17.7(1) min β- (85%) 129Te (19/2-) IT (15%) 129Sb 129m2Sb 1860.90(10) keV >2 µs (15/2-) 129m3Sb 2138.9(5) keV 1.1(1) µs (23/2+) 130Sb 51 79 129.911656(18) 39.5(8) min β- 130Te (8-)# 130mSb 4.80(20) keV 6.3(2) min β- 130Te (4,5)+ 131Sb 51 80 130.911982(22) 23.03(4) min β- 131mTe (7/2+) 132Sb 51 81 131.914467(15) 2.79(5) min β- 132Te (4+) 132m1Sb 200(30) keV 4.15(5) min β- 132Te (8-) 132m2Sb 254.5(3) keV 102(4) ns (6-) 133Sb 51 82 132.915252(27) 2.5(1) min β- 133mTe (7/2+) 134Sb 51 83 133.92038(5) 0.78(6) s β- 134Te (0-) 134mSb 80(110) keV 10.07(5) s β- (99.9%) 134Te (7-) β-, n (0.091%) 133Te 135Sb 51 84 134.92517(11) 1.68(2) s β- (82.4%) 135Te (7/2+) β-, n (17.6%) 134Te 136Sb 51 85 135.93035(32)# 0.923(14) s β- (83%) 136Te 1-# β-, n (17%) 135Te 136mSb 173(3) keV 570(50) ns 6-# 137Sb 51 86 136.93531(43)# 450(50) ms β- 137Te 7/2+# β-, n 136Te 138Sb 51 87 137.94079(32)# 500# ms >300 ns β- 138Te 2-# β-, n 137Te 139Sb 51 88 138.94598(54)# 300# ms >300 ns β- 139Te 7/2+# 동위 원소 분류:원소별 동위 원소 목록