ADOPTED LEVELS, GAMMAS for 216Ra
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-)=-4853 keV 14 | S(n)= 7314 keV 12 | S(p)= 4316 keV 12 | Q(α)= 9526 keV 9 | ||
Reference: 2012WA38 |
References: | |||
A | 220Th α decay | B | (HI,xnγ) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0 | AB | 0+ | 182 ns 10 % α = 100 % ε < 1×10-8 | |||||
688.20 20 | B | 2+ | 688.2 2 | 100 | E2 | 0 | 0+ | |
1164.1 3 | B | 4+ | % α = 0.23 | 475.9 2 | 100 | E2 | 688.20 | 2+ |
1507.6 3 | B | 6+ | < 0.2 ns % α = 0.58 | 343.5 1 | 100 | E2 | 1164.1 | 4+ |
1711.1 4 | B | 8+ | 1.42 ns 20 % α = 1.86 | 203.5 1 | 100 | E2 | 1507.6 | 6+ |
2026.0 4 | B | 10+ | 0.6 ns 1 % α = 0.12 | 314.9 1 | 100 | E2 | 1711.1 | 8+ |
2335.2 4 | B | 11- | 309.2 1 | 100 | E1 | 2026.0 | 10+ | |
2679.4 4 | B | 13- | 0.96 ns 20 | 344.2 1 | 100 | E2 | 2335.2 | 11- |
3292.7 5 | B | 14+ | 613.3 2 | 100 | E1 | 2679.4 | 13- | |
3412.7 5 ? | B | 120.1 2 ? | 100 | D | 3292.7 | 14+ | ||
3491.6 5 | B | 16+ | 198.9 1 | 100 | E2 | 3292.7 | 14+ | |
3580.7? | B | 168? | 100 | 3412.7 | ||||
3582.1 5 | B | 16+ | 289.5 2 | 100 | E2 | 3292.7 | 14+ | |
3712.1 5 | B | 18+ | 130.4 5 220.4 2 | 23 6 100 13 | E2 | 3582.1 3491.6 | 16+ 16+ | |
3763.5 5 | B | 19- | 5.34 ns 15 | 51.4 1 | 100 | E1 | 3712.1 | 18+ |
4320.4 6 | B | (20)- | 556.9 3 | 100 | M1+E2 | 3763.5 | 19- | |
4719.0 6 | B | (21)- | 398.6 2 | 100 | M1+E2 | 4320.4 | (20)- | |
4977.0 7 | B | (23)- | 258.0 2 | 100 | E2 | 4719.0 | (21)- | |
5170.5 7 | B | 6.6 ns 3 | 193.5 2 | 100 | [E2] | 4977.0 | (23)- | |
5471.3 8 | B | 300.8 3 | 100 | (D+Q) | 5170.5 | |||
5832.5 8 | B | 361.2 2 | 100 | (D+Q) | 5471.3 | |||
6266.1 9 | B | 433.6 5 | 100 | (D+Q) | 5832.5 |
E(level): From a least-squares fit to the Eγ in (HI,xnγ)
Jπ(level): From γ(θ) and γ multipolarities, the transitions up to the 3712 level are stretched E2’s (except E1 for the 309γ and 613γ from the 2335 and 3292 levels, respectively)
T1/2(level): From (HI,xnγ), except as noted.
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
688.20 | 2+ | 688.2 2 | E2 | 0.0190 | α=0.0190 | |
1164.1 | 4+ | % α = 0.23 | 475.9 2 | E2 | 0.0435 | α=0.0435 |
1507.6 | 6+ | < 0.2 ns % α = 0.58 | 343.5 1 | E2 | 0.1023 | B(E2)(W.u.)>7.0, α=0.1023 |
1711.1 | 8+ | 1.42 ns 20 % α = 1.86 | 203.5 1 | E2 | 0.549 | B(E2)(W.u.)=9.6 14, α=0.549 |
2026.0 | 10+ | 0.6 ns 1 % α = 0.12 | 314.9 1 | E2 | 0.1316 | B(E2)(W.u.)=3.5 6, α=0.1316 |
2335.2 | 11- | 309.2 1 | E1 | 0.0329 | α=0.0329 | |
2679.4 | 13- | 0.96 ns 20 | 344.2 1 | E2 | 0.1017 | B(E2)(W.u.)=1.4 3, α=0.1017 |
3292.7 | 14+ | 613.3 2 | E1 | 0.00787 | α=0.00787 | |
3491.6 | 16+ | 198.9 1 | E2 | 0.597 | α=0.597 | |
3582.1 | 16+ | 289.5 2 | E2 | 0.1696 | α=0.1696 | |
3712.1 | 18+ | 220.4 2 | E2 | 0.415 | α=0.415 | |
3763.5 | 19- | 5.34 ns 15 | 51.4 1 | E1 | 0.650 | B(E1)(W.u.)=0.000156 5, α=0.650 |
4320.4 | (20)- | 556.9 3 | M1+E2 | 0.08 | α=0.08 6 | |
4719.0 | (21)- | 398.6 2 | M1+E2 | 0.20 | α=0.20 13 | |
4977.0 | (23)- | 258.0 2 | E2 | 0.244 | α=0.244 | |
5170.5 | 6.6 ns 3 | 193.5 2 | [E2] | 0.660 | B(E2)(W.u.)=2.47 12, α=0.660 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
5170.5 | 6.6 ns 3 | g-factor=0.63 6 (2005St24,1985Ad09); other: 0.7 2 (1990Sc29). |
Calculations, compilations, systematics:
Cluster model for α decay, Geiger-Nuttall plot: 1991Bu05
Equilibrium deformation energy: 1988So08
Octupole deformation: 1989Eg02
Proton-neutron interaction energy: 1990Mo11
Quasi-bands in even-even nuclei: 1984Sa37
Super- and hyperdeformed configurations: 1995We02
Levels: For proposed configurations for 216Ra levels, see 1983It01, 1985Ad09, 1990Sc29 and 1991Dr08
Levels: See (HI,xnγ) for a tabulation of α branches from excited states of 216Ra
Gammas: All γ data are from (HI,xnγ)
Q-value: Note: Current evaluation has used the following Q record -4832 28 7314 11 4316 11 9526 8 2003Au03