# Isotopes of indium

Indium ($_{49}$In) consists of two primordial nuclides, with the most common (~ 95.7%) nuclide ($^{115}$In) being measurably though weakly radioactive. Its spin-forbidden decay has a half-life of 4.41×10$^{14}$ years, much longer than the currently accepted age of the Universe.
The stable isotope $^{113}$In is only 4.3% of naturally occurring indium. Among elements with a known stable isotope, only tellurium and rhenium similarly occur with a stable isotope in lower abundance than the long-lived radioactive isotope. Other than $^{115}$In, the longest-lived radioisotope is $^{111}$In, with a half-life of 2.8047 days. All other radioisotopes have half-lives less than a day. This element also has 47 isomers, the longest-lived being $^{114m1}$In, with a half-life of 49.51 days. All other meta-states have half-lives less than a day, most less than an hour, and many measured in milliseconds or less.
Indium-111 is used medically in nuclear imaging, as a radiotracer nuclide tag for gamma camera localization of protein radiopharmaceuticals, such as In-111-labeled octreotide, which binds to receptors on certain endocrine tumors (Octreoscan). Indium-111 is also used in indium white blood cell scans, which use nuclear medical techniques to search for hidden infections.
Several proton-rich isotopes of indium (including indium-99) have been used to measure the mass of the doubly-magic isotope tin-100.

## List of isotopes

| Nuclide | Z | N | Isotopic mass (Da) | Half-life | Decay mode | Daughter isotope | Spin and parity | Natural abundance (mole fraction) | Natural abundance (mole fraction) |
| Nuclide | Excitation energy | Excitation energy | Excitation energy | Half-life | Decay mode | Daughter isotope | Spin and parity | Normal proportion | Range of variation |
| $^{96}$In | 49 | 47 | 95.95911(54)# | 1# ms [>400 ns] | β$^+$? | $^{96}$Cd | 9/2+# | | |
| $^{96}$In | 49 | 47 | 95.95911(54)# | 1# ms [>400 ns] | p? | $^{95}$Cd | 9/2+# | | |
| $^{97}$In | 49 | 48 | 96.94913(43)# | 36(6) ms | β$^+$ (97.7%) | $^{97}$Cd | 9/2+# | | |
| $^{97}$In | 49 | 48 | 96.94913(43)# | 36(6) ms | β$^+$, p (2.3%) | $^{96}$Ag | 9/2+# | | |
| $^{97}$In | 49 | 48 | 96.94913(43)# | 36(6) ms | p? | $^{96}$Cd | 9/2+# | | |
| $^{97m}$In | 400(100)# keV | 400(100)# keV | 400(100)# keV | 0.12(7) ms | p? | $^{96}$Cd | 1/2−# | | |
| $^{98}$In | 49 | 49 | 97.94213(33)# | 30(1) ms | β$^+$ (>99.87%) | $^{98}$Cd | (0+) | | |
| $^{98}$In | 49 | 49 | 97.94213(33)# | 30(1) ms | β$^+$, p (<0.13%) | $^{97}$Ag | (0+) | | |
| $^{98m}$In | 820(730) keV | 820(730) keV | 820(730) keV | 890(20) ms | β$^+$ (56%) | $^{98}$Cd | (9+) | | |
| $^{98m}$In | 820(730) keV | 820(730) keV | 820(730) keV | 890(20) ms | β$^+$, p (44%) | $^{97}$Ag | (9+) | | |
| $^{99}$In | 49 | 50 | 98.93411(32)# | 3.11(6) s | β$^+$ (99.71%) | $^{99}$Cd | 9/2+# | | |
| $^{99}$In | 49 | 50 | 98.93411(32)# | 3.11(6) s | β$^+$, p (0.29%) | $^{98}$Ag | 9/2+# | | |
| $^{100}$In | 49 | 51 | 99.9311019(24) | 5.62(6) s | β$^+$ (98.34%) | $^{100}$Cd | 6+# | | |
| $^{100}$In | 49 | 51 | 99.9311019(24) | 5.62(6) s | β$^+$, p (1.66%) | $^{99}$Ag | 6+# | | |
| $^{101}$In | 49 | 52 | 100.926414(13) | 15.1(11) s | β$^+$ (>98.3%) | $^{101}$Cd | (9/2+) | | |
| $^{101}$In | 49 | 52 | 100.926414(13) | 15.1(11) s | β$^+$, p (<1.7%) | $^{100}$Ag | (9/2+) | | |
| $^{101m}$In | 640(40) keV | 640(40) keV | 640(40) keV | 10# s | β$^+$? | $^{101}$Cd | 1/2−# | | |
| $^{101m}$In | 640(40) keV | 640(40) keV | 640(40) keV | 10# s | IT? | $^{101}$In | 1/2−# | | |
| $^{102}$In | 49 | 53 | 101.9241059(49) | 23.3(1) s | β$^+$ (99.99%) | $^{102}$Cd | (6+) | | |
| $^{102}$In | 49 | 53 | 101.9241059(49) | 23.3(1) s | β$^+$, p (0.0093%) | $^{101}$Ag | (6+) | | |
| $^{103}$In | 49 | 54 | 102.9198788(96) | 60(1) s | β$^+$ | $^{103}$Cd | (9/2+) | | |
| $^{103m}$In | 631.7(1) keV | 631.7(1) keV | 631.7(1) keV | 34(2) s | β$^+$ (67%) | $^{103}$Cd | (1/2−) | | |
| $^{103m}$In | 631.7(1) keV | 631.7(1) keV | 631.7(1) keV | 34(2) s | IT (33%) | $^{103}$In | (1/2−) | | |
| $^{104}$In | 49 | 55 | 103.9182145(62) | 1.80(3) min | β$^+$ | $^{104}$Cd | (5+) | | |
| $^{104m}$In | 93.48(10) keV | 93.48(10) keV | 93.48(10) keV | 15.7(5) s | IT (80%) | $^{104}$In | (3+) | | |
| $^{104m}$In | 93.48(10) keV | 93.48(10) keV | 93.48(10) keV | 15.7(5) s | β$^+$ (20%) | $^{104}$Cd | (3+) | | |
| $^{105}$In | 49 | 56 | 104.914502(11) | 5.07(7) min | β$^+$ | $^{105}$Cd | 9/2+ | | |
| $^{105m}$In | 674.09(25) keV | 674.09(25) keV | 674.09(25) keV | 48(6) s | IT | $^{105}$In | (1/2)− | | |
| $^{105m}$In | 674.09(25) keV | 674.09(25) keV | 674.09(25) keV | 48(6) s | β$^+$? | $^{105}$Cd | (1/2)− | | |
| $^{106}$In | 49 | 57 | 105.9134636(13) | 6.2(1) min | β$^+$ | $^{106}$Cd | 7+ | | |
| $^{106m}$In | 28.6(3) keV | 28.6(3) keV | 28.6(3) keV | 5.2(1) min | β$^+$ | $^{106}$Cd | (2)+ | | |
| $^{107}$In | 49 | 58 | 106.910287(10) | 32.4(3) min | β$^+$ | $^{107}$Cd | 9/2+ | | |
| $^{107m}$In | 678.5(3) keV | 678.5(3) keV | 678.5(3) keV | 50.4(6) s | IT | $^{107}$In | 1/2− | | |
| $^{108}$In | 49 | 59 | 107.9096937(93) | 58.0(12) min | β$^+$ | $^{108}$Cd | 7+ | | |
| $^{108m}$In | 29.75(5) keV | 29.75(5) keV | 29.75(5) keV | 39.6(7) min | β$^+$ | $^{108}$Cd | 2+ | | |
| $^{109}$In | 49 | 60 | 108.9071497(43) | 4.159(10) h | β$^+$ | $^{109}$Cd | 9/2+ | | |
| $^{109m1}$In | 649.79(10) keV | 649.79(10) keV | 649.79(10) keV | 1.34(6) min | IT | $^{109}$In | 1/2− | | |
| $^{109m2}$In | 2101.86(11) keV | 2101.86(11) keV | 2101.86(11) keV | 210.0(9) ms | IT | $^{109}$In | 19/2+ | | |
| $^{110}$In | 49 | 61 | 109.907171(12) | 4.92(8) h | β$^+$ | $^{110}$Cd | 7+ | | |
| $^{110m}$In | 62.08(4) keV | 62.08(4) keV | 62.08(4) keV | 69.1(5) min | β$^+$ | $^{110}$Cd | 2+ | | |
| $^{111}$In | 49 | 62 | 110.9051072(37) | 2.8048(1) d | EC | $^{111}$Cd | 9/2+ | | |
| $^{111m}$In | 536.99(7) keV | 536.99(7) keV | 536.99(7) keV | 7.7(2) min | IT | $^{111}$In | 1/2− | | |
| $^{112}$In | 49 | 63 | 111.9055387(46) | 14.88(15) min | β$^+$ (62%) | $^{112}$Cd | 1+ | | |
| $^{112}$In | 49 | 63 | 111.9055387(46) | 14.88(15) min | β$^−$ (38%) | $^{112}$Sn | 1+ | | |
| $^{112m1}$In | 156.592(25) keV | 156.592(25) keV | 156.592(25) keV | 20.67(8) min | IT | $^{112}$In | 4+ | | |
| $^{112m2}$In | 350.80(5) keV | 350.80(5) keV | 350.80(5) keV | 690(50) ns | IT | $^{112}$In | (7)+ | | |
| $^{112m3}$In | 613.82(6) keV | 613.82(6) keV | 613.82(6) keV | 2.81(3) μs | IT | $^{112}$In | 8− | | |
| $^{113}$In | 49 | 64 | 112.90406045(20) | Stable | Stable | Stable | 9/2+ | 0.04281(52) | |
| $^{113m}$In | 391.699(3) keV | 391.699(3) keV | 391.699(3) keV | 1.6579(4) h | IT | $^{113}$In | 1/2− | | |
| $^{114}$In | 49 | 65 | 113.90491641(32) | 71.9(1) s | β$^−$ (99.50%) | $^{114}$Sn | 1+ | | |
| $^{114}$In | 49 | 65 | 113.90491641(32) | 71.9(1) s | β$^+$ (0.50%) | $^{114}$Cd | 1+ | | |
| $^{114m1}$In | 190.2682(8) keV | 190.2682(8) keV | 190.2682(8) keV | 49.51(1) d | IT (96.75%) | $^{114}$In | 5+ | | |
| $^{114m1}$In | 190.2682(8) keV | 190.2682(8) keV | 190.2682(8) keV | 49.51(1) d | β$^+$ (3.25%) | $^{114}$Cd | 5+ | | |
| $^{114m2}$In | 501.948(3) keV | 501.948(3) keV | 501.948(3) keV | 43.1(6) ms | IT (96.75%) | $^{114m1}$In | 8− | | |
| $^{114m2}$In | 501.948(3) keV | 501.948(3) keV | 501.948(3) keV | 43.1(6) ms | β$^+$ (3.25%) | $^{114}$Cd | 8− | | |
| $^{115}$In | 49 | 66 | 114.903878772(12) | 4.41(25)×10$^{14}$ y | β$^−$ | $^{115}$Sn | 9/2+ | 0.95719(52) | |
| $^{115m}$In | 336.244(17) keV | 336.244(17) keV | 336.244(17) keV | 4.486(4) h | IT (95.0%) | $^{115}$In | 1/2− | | |
| $^{115m}$In | 336.244(17) keV | 336.244(17) keV | 336.244(17) keV | 4.486(4) h | β$^−$ (5.0%) | $^{115}$Sn | 1/2− | | |
| $^{116}$In | 49 | 67 | 115.90525999(24) | 14.10(3) s | β$^−$ (99.98%) | $^{116}$Sn | 1+ | | |
| $^{116}$In | 49 | 67 | 115.90525999(24) | 14.10(3) s | EC (0.0237%) | $^{116}$Cd | 1+ | | |
| $^{116m1}$In | 127.267(6) keV | 127.267(6) keV | 127.267(6) keV | 54.29(17) min | β$^−$ | $^{116}$Sn | 5+ | | |
| $^{116m2}$In | 289.660(6) keV | 289.660(6) keV | 289.660(6) keV | 2.18(4) s | IT | $^{116m1}$In | 8− | | |
| $^{117}$In | 49 | 68 | 116.9045157(52) | 43.2(3) min | β$^−$ | $^{117}$Sn | 9/2+ | | |
| $^{117m}$In | 315.303(11) keV | 315.303(11) keV | 315.303(11) keV | 116.2(3) min | β$^−$ (52.9%) | $^{117}$Sn | 1/2− | | |
| $^{117m}$In | 315.303(11) keV | 315.303(11) keV | 315.303(11) keV | 116.2(3) min | IT (47.1%) | $^{117}$In | 1/2− | | |
| $^{118}$In | 49 | 69 | 117.9063567(83) | 5.0(5) s | β$^−$ | $^{118}$Sn | 1+ | | |
| $^{118m1}$In | 100(50)# keV | 100(50)# keV | 100(50)# keV | 4.364(7) min | β$^−$ | $^{118}$Sn | 5+ | | |
| $^{118m2}$In | 240(50)# keV | 240(50)# keV | 240(50)# keV | 8.5(3) s | IT (98.6%) | $^{118m1}$In | 8− | | |
| $^{118m2}$In | 240(50)# keV | 240(50)# keV | 240(50)# keV | 8.5(3) s | β$^−$ (1.4%) | $^{118}$Sn | 8− | | |
| $^{119}$In | 49 | 70 | 118.9058516(78) | 2.4(1) min | β$^−$ | $^{119}$Sn | 9/2+ | | |
| $^{119m1}$In | 311.37(3) keV | 311.37(3) keV | 311.37(3) keV | 18.0(3) min | β$^−$ (97.4%) | $^{119}$Sn | 1/2− | | |
| $^{119m1}$In | 311.37(3) keV | 311.37(3) keV | 311.37(3) keV | 18.0(3) min | IT (2.6%) | $^{119}$In | 1/2− | | |
| $^{119m2}$In | 654.27(7) keV | 654.27(7) keV | 654.27(7) keV | 130(15) ns | IT | $^{119}$In | (3/2)+ | | |
| $^{119m3}$In | 2656.9(18) keV | 2656.9(18) keV | 2656.9(18) keV | 265(10) ns | IT | $^{119}$In | (25/2+) | | |
| $^{120}$In | 49 | 71 | 119.9079875(33) | 3.08(8) s | β$^−$ | $^{120}$Sn | 1+ | | |
| $^{120m1}$In | 90.1(26) keV | 90.1(26) keV | 90.1(26) keV | 46.2(8) s | β$^−$ | $^{120}$Sn | 5+ | | |
| $^{120m2}$In | 90.1(26) keV | 90.1(26) keV | 90.1(26) keV | 47.3(5) s | β$^−$ | $^{120}$Sn | 8− | | |
| $^{121}$In | 49 | 72 | 120.9078416(13) | 23.1(6) s | β$^−$ | $^{121}$Sn | 9/2+ | | |
| $^{121m1}$In | 313.68(7) keV | 313.68(7) keV | 313.68(7) keV | 3.88(10) min | β$^−$ (98.8%) | $^{121}$Sn | 1/2− | | |
| $^{121m1}$In | 313.68(7) keV | 313.68(7) keV | 313.68(7) keV | 3.88(10) min | IT (1.2%) | $^{121}$In | 1/2− | | |
| $^{121m2}$In | 2550(100)# keV | 2550(100)# keV | 2550(100)# keV | 7.3(2) μs | IT | $^{121}$In | (25/2+) | | |
| $^{122}$In | 49 | 73 | 121.9103046(13) | 10.3(6) s | β$^−$ | $^{122}$Sn | 5+ | | |
| $^{122m1}$In | <15 keV | <15 keV | <15 keV | 10.8(4) s | β$^−$ | $^{122}$Sn | 8− | | |
| $^{122m2}$In | 77.2(15) keV | 77.2(15) keV | 77.2(15) keV | 1.5(3) s | β$^−$ | $^{122}$Sn | 1+ | | |
| $^{123}$In | 49 | 74 | 122.9104679(12) | 6.17(5) s | β$^−$ | $^{123m}$Sn | 9/2+ | | |
| $^{123m1}$In | 327.21(4) keV | 327.21(4) keV | 327.21(4) keV | 47.4(4) s | β$^−$ | $^{123}$Sn | 1/2− | | |
| $^{123m2}$In | 2078.1(6) keV | 2078.1(6) keV | 2078.1(6) keV | 1.4(2) μs | IT | $^{123}$In | (17/2−) | | |
| $^{123m3}$In | 2103(14)# keV | 2103(14)# keV | 2103(14)# keV | >100 μs | IT | $^{123}$In | (21/2−) | | |
| $^{124}$In | 49 | 75 | 123.9131390(34) | 3.67(03) s | β$^−$ | $^{124}$Sn | 8− | | |
| $^{124m}$In | 24.2(26) keV | 24.2(26) keV | 24.2(26) keV | 3.12(9) s | β$^−$ | $^{124}$Sn | 3+ | | |
| $^{125}$In | 49 | 76 | 124.9136738(19) | 2.36(4) s | β$^−$ | $^{125m}$Sn | 9/2+ | | |
| $^{125m1}$In | 352(12) keV | 352(12) keV | 352(12) keV | 12.2(2) s | β$^−$ | $^{125}$Sn | 1/2− | | |
| $^{125m2}$In | 2009.4(7) keV | 2009.4(7) keV | 2009.4(7) keV | 9.4(6) μs | IT | $^{125}$In | (19/2+) | | |
| $^{125m3}$In | 2161.2(9) keV | 2161.2(9) keV | 2161.2(9) keV | 5.0(15) ms | IT | $^{125}$In | (23/2−) | | |
| $^{126}$In | 49 | 77 | 125.9164682(45) | 1.53(1) s | β$^−$ | $^{126}$Sn | 3+ | | |
| $^{126m1}$In | 90(7) keV | 90(7) keV | 90(7) keV | 1.64(5) s | β$^−$ | $^{126}$Sn | 8− | | |
| $^{126m2}$In | 243.3(2) keV | 243.3(2) keV | 243.3(2) keV | 22(2) μs | IT | $^{126}$In | 1− | | |
| $^{127}$In | 49 | 78 | 126.9174539(14) | 1.086(7) s | β$^−$ (>99.97%) | $^{127m}$Sn | 9/2+ | | |
| $^{127}$In | 49 | 78 | 126.9174539(14) | 1.086(7) s | β$^−$, n (<0.03%) | $^{126}$Sn | 9/2+ | | |
| $^{127m1}$In | 407.9(50) keV | 407.9(50) keV | 407.9(50) keV | 3.618(21) s | β$^−$ (99.30%) | $^{127m}$Sn | 1/2−# | | |
| $^{127m1}$In | 407.9(50) keV | 407.9(50) keV | 407.9(50) keV | 3.618(21) s | β$^−$, n (0.70%) | $^{126}$Sn | 1/2−# | | |
| $^{127m2}$In | 1728.7(12) keV | 1728.7(12) keV | 1728.7(12) keV | 1.04(10) s | β$^−$ | $^{127m}$Sn | (21/2−) | | |
| $^{127m2}$In | 1728.7(12) keV | 1728.7(12) keV | 1728.7(12) keV | 1.04(10) s | β$^−$, n? | $^{126}$Sn | (21/2−) | | |
| $^{127m3}$In | 2364.7(9) keV | 2364.7(9) keV | 2364.7(9) keV | 9(2) μs | IT | $^{127}$In | (29/2+) | | |
| $^{128}$In | 49 | 79 | 127.9203536(14) | 816(27) ms | β$^−$ (99.96%) | $^{128}$Sn | (3)+ | | |
| $^{128}$In | 49 | 79 | 127.9203536(14) | 816(27) ms | β$^−$, n (0.038%) | $^{127}$Sn | (3)+ | | |
| $^{128m1}$In | 247.87(10) keV | 247.87(10) keV | 247.87(10) keV | 23(2) μs | IT | $^{128}$In | (1)− | | |
| $^{128m2}$In | 285.1(22) keV | 285.1(22) keV | 285.1(22) keV | 720(100) ms | β$^−$ | $^{128}$Sn | (8−) | | |
| $^{128m2}$In | 285.1(22) keV | 285.1(22) keV | 285.1(22) keV | 720(100) ms | IT? | $^{128}$In | (8−) | | |
| $^{128m2}$In | 285.1(22) keV | 285.1(22) keV | 285.1(22) keV | 720(100) ms | β$^−$, n? | $^{127}$Sn | (8−) | | |
| $^{128m3}$In | 1797.6(16) keV | 1797.6(16) keV | 1797.6(16) keV | >0.3 s | β$^−$ | $^{128}$Sn | (16+) | | |
| $^{128m3}$In | 1797.6(16) keV | 1797.6(16) keV | 1797.6(16) keV | >0.3 s | IT? | $^{128}$In | (16+) | | |
| $^{128m3}$In | 1797.6(16) keV | 1797.6(16) keV | 1797.6(16) keV | >0.3 s | β$^−$, n? | $^{127}$Sn | (16+) | | |
| $^{129}$In | 49 | 80 | 128.9218085(21) | 570(10) ms | β$^−$ (99.77%) | $^{129}$Sn | 9/2+ | | |
| $^{129}$In | 49 | 80 | 128.9218085(21) | 570(10) ms | β$^−$, n (0.23%) | $^{128}$Sn | 9/2+ | | |
| $^{129m1}$In | 449.1(59) keV | 449.1(59) keV | 449.1(59) keV | 1.23(3) s | β$^−$ (96.2%) | $^{129}$Sn | 1/2− | | |
| $^{129m1}$In | 449.1(59) keV | 449.1(59) keV | 449.1(59) keV | 1.23(3) s | β$^−$, n (3.6%) | $^{128}$Sn | 1/2− | | |
| $^{129m1}$In | 449.1(59) keV | 449.1(59) keV | 449.1(59) keV | 1.23(3) s | IT? | $^{129}$In | 1/2− | | |
| $^{129m2}$In | 1646.6(33) keV | 1646.6(33) keV | 1646.6(33) keV | 670(100) ms | β$^−$ | $^{129}$Sn | (23/2−) | | |
| $^{129m2}$In | 1646.6(33) keV | 1646.6(33) keV | 1646.6(33) keV | 670(100) ms | IT? | $^{129}$In | (23/2−) | | |
| $^{129m3}$In | 1687.97(25) keV | 1687.97(25) keV | 1687.97(25) keV | 11.2(2) μs | IT | $^{129}$In | (17/2−) | | |
| $^{129m4}$In | 1927.6(33) keV | 1927.6(33) keV | 1927.6(33) keV | 110(15) ms | IT | $^{129}$In | (29/2+) | | |
| $^{129m4}$In | 1927.6(33) keV | 1927.6(33) keV | 1927.6(33) keV | 110(15) ms | β$^−$? | $^{129}$Sn | (29/2+) | | |
| $^{130}$In | 49 | 81 | 129.9249523(19) | 273(5) ms | β$^−$ (99.07%) | $^{130}$Sn | 1(−) | | |
| $^{130}$In | 49 | 81 | 129.9249523(19) | 273(5) ms | β$^−$, n (0.93%) | $^{129}$Sn | 1(−) | | |
| $^{130m1}$In | 66.5(27) keV | 66.5(27) keV | 66.5(27) keV | 540(10) ms | β$^−$ (98.20%) | $^{130}$Sn | (10-) | | |
| $^{130m1}$In | 66.5(27) keV | 66.5(27) keV | 66.5(27) keV | 540(10) ms | β$^−$, n (1.80%) | $^{129}$Sn | (10-) | | |
| $^{130m2}$In | 385.4(26) keV | 385.4(26) keV | 385.4(26) keV | 540(10) ms | β$^−$ (98.20%) | $^{130}$Sn | (5+) | | |
| $^{130m2}$In | 385.4(26) keV | 385.4(26) keV | 385.4(26) keV | 540(10) ms | β$^−$, n (1.80%) | $^{129}$Sn | (5+) | | |
| $^{130m3}$In | 388.3(2) keV | 388.3(2) keV | 388.3(2) keV | 4.6(2) μs | IT | $^{130}$In | (3+) | | |
| $^{131}$In | 49 | 82 | 130.9269728(24) | 261.5(28) ms | β$^−$ (97.75%) | $^{131}$Sn | 9/2+ | | |
| $^{131}$In | 49 | 82 | 130.9269728(24) | 261.5(28) ms | β$^−$, n (2.25%) | $^{130}$Sn | 9/2+ | | |
| $^{131m1}$In | 376(3) keV | 376(3) keV | 376(3) keV | 328(15) ms | β$^−$ (97.75%) | $^{131}$Sn | 1/2− | | |
| $^{131m1}$In | 376(3) keV | 376(3) keV | 376(3) keV | 328(15) ms | β$^−$, n (2.25%) | $^{130}$Sn | 1/2− | | |
| $^{131m1}$In | 376(3) keV | 376(3) keV | 376(3) keV | 328(15) ms | IT? | $^{131}$In | 1/2− | | |
| $^{131m2}$In | 3750(90) keV | 3750(90) keV | 3750(90) keV | 322(41) ms | β$^−$ (88%) | $^{131}$Sn | (21/2+) | | |
| $^{131m2}$In | 3750(90) keV | 3750(90) keV | 3750(90) keV | 322(41) ms | β$^−$, n (12%) | $^{130}$Sn | (21/2+) | | |
| $^{131m2}$In | 3750(90) keV | 3750(90) keV | 3750(90) keV | 322(41) ms | IT? | $^{129}$Sn | (21/2+) | | |
| $^{131m3}$In | 3783.6(5) keV | 3783.6(5) keV | 3783.6(5) keV | 669(34) ns | IT | $^{131}$In | (17/2+) | | |
| $^{132}$In | 49 | 83 | 131.932998(64) | 202.2(2) ms | β$^−$ (87.7%) | $^{132}$Sn | (7−) | | |
| $^{132}$In | 49 | 83 | 131.932998(64) | 202.2(2) ms | β$^−$, n (12.3%) | $^{131}$Sn | (7−) | | |
| $^{132}$In | 49 | 83 | 131.932998(64) | 202.2(2) ms | β$^−$, 2n? | $^{130}$Sn | (7−) | | |
| $^{133}$In | 49 | 84 | 132.93807(22)# | 163.0(16) ms | β$^−$, n (85%) | $^{132}$Sn | (9/2+) | | |
| $^{133}$In | 49 | 84 | 132.93807(22)# | 163.0(16) ms | β$^−$ (15%) | $^{133}$Sn | (9/2+) | | |
| $^{133}$In | 49 | 84 | 132.93807(22)# | 163.0(16) ms | β$^−$, 2n? | $^{131}$Sn | (9/2+) | | |
| $^{133m}$In | 330(40)# keV | 330(40)# keV | 330(40)# keV | 167(11) ms | β$^−$, n (93%) | $^{132}$Sn | (1/2−) | | |
| $^{133m}$In | 330(40)# keV | 330(40)# keV | 330(40)# keV | 167(11) ms | β$^−$ (7%) | $^{133}$Sn | (1/2−) | | |
| $^{134}$In | 49 | 85 | 133.94421(22)# | 140(4) ms | β$^−$, n (65%) | $^{133}$Sn | 7−# | | |
| $^{134}$In | 49 | 85 | 133.94421(22)# | 140(4) ms | β$^−$? | $^{134}$Sn | 7−# | | |
| $^{134}$In | 49 | 85 | 133.94421(22)# | 140(4) ms | β$^−$, 2n (<4%) | $^{132}$Sn | 7−# | | |
| $^{134m}$In | 56.7(1) keV | 56.7(1) keV | 56.7(1) keV | 3.5(4) μs | IT | $^{134}$In | (5−) | | |
| $^{135}$In | 49 | 86 | 134.94943(32)# | 103(3) ms | β$^−$ | $^{135}$Sn | 9/2+# | | |
| $^{135}$In | 49 | 86 | 134.94943(32)# | 103(3) ms | β$^−$, n? | $^{134}$Sn | 9/2+# | | |
| $^{135}$In | 49 | 86 | 134.94943(32)# | 103(3) ms | β$^−$, 2n? | $^{133}$Sn | 9/2+# | | |
| $^{136}$In | 49 | 87 | 135.95602(32)# | 86(9) ms | β$^−$ | $^{136}$Sn | 7−# | | |
| $^{136}$In | 49 | 87 | 135.95602(32)# | 86(9) ms | β$^−$, n? | $^{135}$Sn | 7−# | | |
| $^{136}$In | 49 | 87 | 135.95602(32)# | 86(9) ms | β$^−$, 2n? | $^{134}$Sn | 7−# | | |
| $^{137}$In | 49 | 88 | 136.96154(43)# | 70(40) ms | β$^−$ | $^{137}$Sn | 9/2+# | | |
| $^{137}$In | 49 | 88 | 136.96154(43)# | 70(40) ms | β$^−$, n? | $^{136}$Sn | 9/2+# | | |
| $^{137}$In | 49 | 88 | 136.96154(43)# | 70(40) ms | β$^−$, 2n? | $^{135}$Sn | 9/2+# | | |
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* ↑ $^m$In – Excited nuclear 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).
* 1 2 3 # – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
* ↑ Modes of decay: EC:Electron capture IT:Isomeric transition 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.
* 1 2 3 4 Order of ground state and isomer is uncertain.
* ↑ Used in medical applications
* 1 2 Fission product
* ↑ Primordial radionuclide
* ↑ Order of isomers is uncertain.