ADOPTED LEVELS, GAMMAS for 216Po
Author: C. Morse | Citation: Nucl. Data Sheets 209, 409 (2026) | Cutoff date: 5-Aug-2025
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-474 keV 4 | S(n)= 5747.2 keV 23 | S(p)= 7136 keV 6 | Q(α)= 6906.3 keV 5 | ||
| Reference: 2021Wa16 |
| References: | |||
| A | 216Bi β- decay (128 S) | B | 216Bi β- decay (3.41 M) |
| C | 220Rn α decay | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | ABC | 0+ | 144.0 ms 6 % α = 100 | |||||
| 549.76 5 | ABC | 2+ | 11 ps 5 | 549.73 5 | 100 | [E2] | 0.0 | 0+ |
| 968.67 9 | AB | (4+) | 21 ps 5 | 418.8 2 | 100 | [E2] | 549.76 | 2+ |
| 1130.64 10 | B | (2,3,4) | 580.9 2 | 100 | 549.76 | 2+ | ||
| 1328.15 24 | AB | (6+) | 31 ps 5 | 359.6 | 100 | [E2] | 968.67 | (4+) |
| 1363.92 12 | B | (1+,2+) | 814.1 2 1363.8 3 | 100 2 68 2 | 549.76 0.0 | 2+ 0+ | ||
| 1404.51 15 | B | (1+,2,3,4,5+) | 854.7 2 | 100 | 549.76 | 2+ | ||
| 1503.37 10 | B | (2+,3,4+) | 372.6 2 534.9 3 953.5 2 1503.4 2 ? | 11 2 17 2 100 1 2.6 4 | 1130.64 968.67 549.76 0.0 | (2,3,4) (4+) 2+ 0+ | ||
| 1525.47 22 | B | (1+,2,3,4,5+) | 556.8 2 | 100 | 968.67 | (4+) | ||
| 1551.5 3 | A | (8+) | 409 ps 16 | 223.4 2 | 100 | [E2] | 1328.15 | (6+) |
| 1611.55 20 ? | A | (6+) | 283.3 3 ? 642.9 2 ? | 70 20 100 20 | (M1+E2) (E2) | 1328.15 968.67 | (6+) (4+) | |
| 1627.17 22 | B | (1+,2,3,4,5+) | 658.5 2 | 100 | 968.67 | (4+) | ||
| 1676.03 14 | B | (1+,2,3,4+) | 1126.2 2 1676.1 2 ? | 100 18 31 2 | 549.76 0.0 | 2+ 0+ | ||
| 1699.3 3 | A | (7,8,9) | 147.8 2 | 100 | 1551.5 | (8+) | ||
| 1709.77 10 | B | (2+,3,4+) | 206.4 3 305.2 2 ? 345.7 2 579.1 2 741.1 2 1160.0 2 1710.0 2 ? | 14 3 5 1 11 2 23 4 47 1 100 1 1.8 3 | 1503.37 1404.51 1363.92 1130.64 968.67 549.76 0.0 | (2+,3,4+) (1+,2,3,4,5+) (1+,2+) (2,3,4) (4+) 2+ 0+ | ||
| 1727.21 12 | B | (2+,3,4+) | 223.7 2 596.8 2 758.6 2 1177.3 2 | 6.7 13 9.2 5 100 1 4.5 18 | 1503.37 1130.64 968.67 549.76 | (2+,3,4+) (2,3,4) (4+) 2+ | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 1785.6 3 | A | (6+,7,8) | 457.5 2 | 100 | 1328.15 | (6+) | ||
| 1792.27 14 | B | (2+,3,4+) | 428.4 3 ? 823.6 2 1242.5 2 | 6 1 100 1 42 7 | 1363.92 968.67 549.76 | (1+,2+) (4+) 2+ | ||
| 1797.5 3 | B | (1+,2,3,4,5+) | 1247.7 3 | 100 | 549.76 | 2+ | ||
| 1802.7 3 | A | (7,8,9) | 155 ps 14 | 251.2 2 | 100 | 1551.5 | (8+) | |
| 1814.3 3 | A | (6+) | 486.1 3 | 100 | E0+M1+(E2) | 1328.15 | (6+) | |
| 1818.11 15 | B | (1+,2,3,4,5+) | 687.5 2 849.3 2 | 75 14 100 17 | 1130.64 968.67 | (2,3,4) (4+) | ||
| 1873.9 3 | A | (7,8,9) | 322.4 2 | 100 | 1551.5 | (8+) | ||
| 1875.80 12 | B | (1+,2,3,4,5+) | 745.0 2 1326.1 2 1875.9 2 ? | 56 2 100 17 25 2 | 1130.64 549.76 0.0 | (2,3,4) 2+ 0+ | ||
| 1890.2 3 | A | (6+,7,8) | 562.1 2 | 100 | 1328.15 | (6+) | ||
| 1908.29 14 | B | (2+,3,4+) | 544.4 3 580.2 3 ? 939.6 2 1358.5 2 | 14 3 19 7 77 2 100 18 | 1363.92 1328.15 968.67 549.76 | (1+,2+) (6+) (4+) 2+ | ||
| 1911.88 22 | B | (2,3,4,5+) | 943.2 2 | 100 | 968.67 | (4+) | ||
| 1916.76 21 | B | (1+,2,3,4,5+) | 1367.0 2 | 100 | 549.76 | 2+ | ||
| 1964.37 15 | B | (2+,3,4+) | 995.7 2 1414.6 2 | 100 7 99 6 | 968.67 549.76 | (4+) 2+ | ||
| 1970.68 22 | B | (1+,2,3,4,5+) | 1002.0 2 | 100 | 968.67 | (4+) | ||
| 1979.9 3 ? | A | (7,8,9) | 428.4 2 ? 651.6 4 | 100 4 11 6 | 1551.5 1328.15 | (8+) (6+) | ||
| 2010.0 3 | B | (1+,2,3,4,5+) | 1460.3 3 | 100 | 549.76 | 2+ | ||
| 2031.14 20 | B | (2,3,4) | 1062.4 2 1481.8 5 ? | 100 21 4 2 | 968.67 549.76 | (4+) 2+ | ||
| 2038.8 3 | A | (7,8,9) | 487.3 2 | 100 | 1551.5 | (8+) | ||
| 2075.28 22 | B | (2,3,4,5+) | 1106.6 2 | 100 | 968.67 | (4+) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 2083.4 6 ? | B | (1+,2,3,4,5+) | 1533.6 6 ? | 100 | 549.76 | 2+ | ||
| 2114.5 3 | B | (1+,2,3,4,5+) | 1564.7 3 | 100 | 549.76 | 2+ | ||
| 2179.67 25 | B | (2+,3,4+) | 815.6 6 1211.0 3 1630.0 5 | 100 4 78 28 75 19 | 1363.92 968.67 549.76 | (1+,2+) (4+) 2+ | ||
| 2182.1 3 | A | (7,8,9) | 630.6 2 | 100 | 1551.5 | (8+) | ||
| 2234.3 3 | A | (7,8,9) | 682.8 2 | 100 | 1551.5 | (8+) | ||
| 2271.2 3 | A | (7,8+) | 659.6 2 719.8 4 | 100 14 49 17 | 1611.55 1551.5 | (6+) (8+) | ||
| 2282.6 3 | B | (2,3,4,5+) | 1313.9 3 | 100 | 968.67 | (4+) | ||
| 2338.2 4 | A | (7,8+) | 523.9 2 535.5 3 | 91 7 100 28 | 1814.3 1802.7 | (6+) (7,8,9) | ||
| 2406.5 3 ? | B | (1+,2,3,4,5+) | 1275.9 3 ? | 100 | 1130.64 | (2,3,4) | ||
| 2446.22 18 | B | (1+,2,3,4,5+) | 628.1 2 1315.6 2 | 100 16 51 12 | 1818.11 1130.64 | (1+,2,3,4,5+) (2,3,4) | ||
| 2476.20 25 | B | (1+,2,3,4,5+) | 684.0 4 1926.4 3 ? | 100 25 63 19 | 1792.27 549.76 | (2+,3,4+) 2+ | ||
| 2479.2 3 | B | (1+,2,3,4,5+) | 660.9 3 1348.9 4 | 77 13 100 33 | 1818.11 1130.64 | (1+,2,3,4,5+) (2,3,4) | ||
| 2509.0 4 | A | (7,8,9) | 694.7 2 | 100 | 1814.3 | (6+) | ||
| 2570.68 18 | B | (2+,3,4+) | 1602.1 2 2020.7 3 | 100 19 71 14 | 968.67 549.76 | (4+) 2+ | ||
| 2609.7 3 | B | (1+,2,3,4) | 2059.9 3 | 100 | 549.76 | 2+ | ||
| 2613.6 4 | A | (7,8,9) | 1062.1 3 | 100 | 1551.5 | (8+) | ||
| 2683.92 15 | B | (2+,3,4+) | 1715.1 2 2134.3 2 | 100 6 47 6 | 968.67 549.76 | (4+) 2+ | ||
| 2727.5 4 | A | (7,8,9) | 1176.0 3 | 100 | 1551.5 | (8+) | ||
| 2761.3 5 | A | (7,8,9) | 1209.8 4 | 100 | 1551.5 | (8+) | ||
| 2820.66 22 | B | (2,3,4) | 1690.0 3 2270.9 3 | 44 9 100 18 | 1130.64 549.76 | (2,3,4) 2+ | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 2850.4 4 | A | (7,8,9) | 1298.9 3 | 100 | 1551.5 | (8+) | ||
| 2864.40 19 | B | (2,3,4) | 854.5 4 2314.6 2 | 50 13 100 7 | 2010.0 549.76 | (1+,2,3,4,5+) 2+ | ||
| 3096.2 9 ? | B | (1+,2,3,4,5+) | 2546.4 9 ? | 100 | 549.76 | 2+ | ||
| 3136.0 3 ? | B | (2,3,4) | 2586.2 3 ? | 100 | 549.76 | 2+ | ||
| 3166.4 8 ? | B | (2,3,4) | 2616.6 8 ? | 100 | 549.76 | 2+ | ||
| 3290.3 5 | B | (2,3,4) | 2740.5 5 | 100 | 549.76 | 2+ | ||
| 3333.9 3 | B | (2+,3,4+) | 2365.1 3 2784.5 5 | 72 9 100 29 | 968.67 549.76 | (4+) 2+ | ||
| 3395.9 4 | B | (2,3,4) | 2846.1 4 | 100 | 549.76 | 2+ | ||
E(level): From a least-squares fit to Eγ.
E(γ): From 2024An09, 216Bi ground and isomeric state β- decay, unless stated otherwise.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - Yrast sequence. | |||||||
| 0.0 | 0+ | 144.0 ms 6 % α = 100 | |||||
| 549.76 5 | 2+ | 11 ps 5 | 549.73 5 | 100 | [E2] | 0.0 | 0+ |
| 968.67 9 | (4+) | 21 ps 5 | 418.8 2 | 100 | [E2] | 549.76 | 2+ |
| 1328.15 24 | (6+) | 31 ps 5 | 359.6 | 100 | [E2] | 968.67 | (4+) |
| 1551.5 3 | (8+) | 409 ps 16 | 223.4 2 | 100 | [E2] | 1328.15 | (6+) |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 549.76 | 2+ | 11 ps 5 | 549.73 5 | [E2] | 0.0257 | B(E2)(W.u.)=13 +10-4, α=0.0257 4, α(K)=0.01826 26, α(L)=0.00561 8, α(M)=0.001399 20, α(N)=0.000359 5, α(O)=7.21E-5 10, α(P)=8.05E-6 11 |
| 968.67 | (4+) | 21 ps 5 | 418.8 2 | [E2] | 0.0498 | B(E2)(W.u.)=26 +8-5, α=0.0498 7, α(K)=0.0321 5, α(L)=0.01328 19, α(M)=0.00338 5, α(N)=0.000868 12, α(O)=0.0001717 24, α(P)=1.823E-5 26 |
| 1328.15 | (6+) | 31 ps 5 | 359.6 | [E2] | 0.0748 | B(E2)(W.u.)=37 +7-5, α=0.0748 10, α(K)=0.0447 6, α(L)=0.02254 32, α(M)=0.00579 8, α(N)=0.001487 21, α(O)=0.000292 4, α(P)=3.01E-5 4 |
| 1551.5 | (8+) | 409 ps 16 | 223.4 2 | [E2] | 0.322 | B(E2)(W.u.)=24.4 10, α=0.322 5, α(K)=0.1305 18, α(L)=0.1424 21, α(M)=0.0375 5, α(N)=0.00962 14, α(O)=0.001856 27, α(P)=0.0001774 26 |
| 1611.55 | (6+) | 283.3 3 | (M1+E2) | 0.37 | α=0.37 22, α(K)=0.28 20, α(L)=0.070 15, α(M)=0.0171 28, α(N)=0.0044 7, α(O)=0.00089 18, α(P)=1.04×10-4 34 | |
| (6+) | 642.9 2 | (E2) | 0.01812 | α=0.01812 25, α(K)=0.01338 19, α(L)=0.00358 5, α(M)=0.000883 12, α(N)=0.0002267 32, α(O)=4.58×10-5 6, α(P)=5.25E-6 7 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 549.76 | 2+ | 11 ps 5 | T1/2(level): From 2025Li06. |
| 968.67 | (4+) | 21 ps 5 | E(level): From observed yrast-cascade sequence, in analogy to lighter polonium isotopes. T1/2(level): From 2025Li06. |
| 1328.15 | (6+) | 31 ps 5 | E(level): From observed yrast-cascade sequence, in analogy to lighter polonium isotopes. T1/2(level): From 2025Li06. |
| 1551.5 | (8+) | 409 ps 16 | E(level): From observed yrast-cascade sequence, in analogy to lighter polonium isotopes. T1/2(level): From 2025Li06. |
| 1802.7 | (7,8,9) | 155 ps 14 | T1/2(level): From 2025Li06. |
| E(level) | E(gamma) | Comments |
| 549.76 | 549.73 | E(γ): From 220Rn α decay. |
| 1611.55 | 283.3 | M(γ): See the comment on the Jπ of the 1611-keV level for a discussion of the multipolarities of the 283.3 and 642.9-keV γ rays. | 642.9 | M(γ): See the comment on the Jπ of the 1611-keV level for a discussion of the multipolarities of the 283.3 and 642.9-keV γ rays. |
| 1814.3 | 486.1 | M(γ): From 2024An09, based on α(exp)= 1.1 4 |