ADOPTED LEVELS, GAMMAS for 216Po
Author: S. -c. Wu | Citation: Nucl. Data Sheets 108, 1057 (2007) | Cutoff date: 1-Mar-2007
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-474 keV 4 | S(n)= 5747.2 keV 24 | S(p)= 7154 keV 15 | Q(α)= 6906.3 keV 5 | ||
Reference: 2012WA38 |
References: | |||
A | 216Bi β- decay (2.25 M) | B | 216Bi β- decay (2.25 M+6.6 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+ | 0.145 s 2 % α = 100 | |||||
549.76 4 | ABC | 2+ | 549.76 4 | 100 | (E2) | 0.0 | 0+ | |
968.94 9 | AB | (4+) | 419.18 8 | 100 | (E2) | 549.76 | 2+ | |
1328.4 4 | A | (6+) | 359.5 | 100 | (E2) | 968.94 | (4+) | |
1551.8 5 | A | (8+) | 223.4 | 100 | (E2) | 1328.4 | (6+) | |
1699.6 6 | A | 147.8 | 100 | 1551.8 | (8+) | |||
1803.0 6 | A | 251.2 | 100 | 1551.8 | (8+) | |||
1874.2 6 | A | 322.4 | 100 | 1551.8 | (8+) | |||
1980.5? | A | 428.7? | 100 | 1551.8 | (8+) | |||
2038.7 6 | A | 486.9 | 100 | 1551.8 | (8+) | |||
2233.8 6 | A | 682.0 | 100 | 1551.8 | (8+) |
E(level): If ΔEγ not given, |+0.30 keV assumed for least-squares fitting
E(level): From least-square fit to Eγ’s with Δ(Eγ)=0.3 keV assumed when the uncertainty is not given.
Jπ(level): Assigned as members of the yrast sequence, β- decayed from the 2.25 min isomer of 216Bi with Jπ=(6-,7-), feeding the 1551.4 level.
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - Yrast sequence. | |||||||
0.0 | 0+ | 0.145 s 2 % α = 100 | |||||
549.76 4 | 2+ | 549.76 4 | 100 | (E2) | 0.0 | 0+ | |
968.94 9 | (4+) | 419.18 8 | 100 | (E2) | 549.76 | 2+ | |
1328.4 4 | (6+) | 359.5 | 100 | (E2) | 968.94 | (4+) | |
1551.8 5 | (8+) | 223.4 | 100 | (E2) | 1328.4 | (6+) |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
549.76 | 2+ | 549.76 4 | (E2) | 0.0257 | α=0.0257 | |
968.94 | (4+) | 419.18 8 | (E2) | 0.0497 | α=0.0497 | |
1328.4 | (6+) | 359.5 | (E2) | 0.0749 | α=0.0749 | |
1551.8 | (8+) | 223.4 | (E2) | 0.322 | α=0.322 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 0+ | 0.145 s 2 % α = 100 | E(level): Yrast sequence. |
549.76 | 2+ | E(level): Yrast sequence. | |
968.94 | (4+) | E(level): Yrast sequence. | |
1328.4 | (6+) | E(level): Yrast sequence. | |
1551.8 | (8+) | E(level): Yrast sequence. |
E(level) | E(gamma) | Comments |
549.76 | 549.76 | E(γ): weighted average of Eγ’s from 216Bi β- decay (2.25 min), 216Bi β- decay (2.25 min+6.6 min) and 220Rn α decay. M(γ): from 220Rn α decay |
968.94 | 419.18 | E(γ): weighted average of Eγ’s from 216Bi β- decay (2.25 min) and 216Bi β- decay (2.25 min+6.6 min). |
Historical Note: this isotope was originally called Thorium a with symbol Th a.
Calculations, compilations:
Cluster model for α decay, Geiger-Nuttall plot: 1991Bu05
Quasi-bands in even-even nuclei: 1984Sa37
Spontaneous emission of heavy ions: 1986Po06
Superdeformed and hyperdeformed configurations: 1995We02
Q-value: Note: Current evaluation has used the following Q record -473 4 5747.2 23 7154 15 6906.3 5 2003Au03