ADOPTED LEVELS, GAMMAS for 208Tl
Author: M. J. Martin | Citation: Nucl. Data Sheets 108,1583 (2007) | Cutoff date: 1-Jun-2007
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=4998.9 keV 18 | S(n)= 3787 keV 6 | S(p)= 7.55×103 keV 3 | Q(α)= 1.48×103 keV SY | ||
Reference: 2012WA38 |
References: | |||
A | 212Bi α decay (60.55 M) | B | 208Pb(t,3He) |
C | 208Pb(n,p),(7Li,7Be),(13C,13N) | D | 212Bi α decay (25.0 M) |
E | 208Hg β- decay | F | 208Pb(π-,PI0) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | AB DE | 5+ | 3.053 m 4 % β- = 100 | |||||
39.858 4 | AB DE | 4+ | 6.5 ps 8 | 39.858 4 | 100 | M1 | 0.0 | 5+ |
328.04 5 | AB D | 5+ | > 0.1 ps | 288.20 4 328.03 4 | 100.0 9 37.2 18 | M1 M1 | 39.858 0.0 | 4+ 5+ |
473.4 4 | AB E | (4+) | 433.7 5 473.0 7 | 34 7 100 7 | (M1) (M1) | 39.858 0.0 | 4+ 5+ | |
492.84 4 | AB E | (3)+ | 164.0? 452.98 5 493.3 7 ? | 100.0 9 <1 | M1 | 328.04 39.858 0.0 | 5+ 4+ 5+ | |
617 | E | 143.6 288.8 | | 473.4 328.04 | (4+) 5+ | |||
620.4 3 | AB D | (6+) | 576? 620? | | 39.858 0.0 | 4+ 5+ | ||
698 45 | B | |||||||
760 | A E | 142.0 266.9 285.4 | | 617 492.84 473.4 | (3)+ (4+) | |||
789 14 | B | |||||||
8E+2 3 | C | (1-) | ||||||
803 | A E | 43.0 310.4 | | 760 492.84 | (3)+ | |||
1135 15 | B | |||||||
1199 57 | B | |||||||
1245 49 | B | |||||||
1322 14 | B | |||||||
1362 | E | 559.1 602.2 | | 803 760 | ||||
1410 15 | B | |||||||
1474 15 | B | |||||||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1525 18 | B | |||||||
1637 18 | B | |||||||
1652 | E | 290.0 849.2 892.3 1159.0 | | 1362 803 760 492.84 | (3)+ | |||
1696 37 | B | |||||||
1728 | E | 365.8 925.0 968.0 1235.0 | | 1362 803 760 492.84 | (3)+ | |||
1775 27 | B | |||||||
1851 18 | B | |||||||
1912 49 | B | |||||||
1.97E+3 14 | B | |||||||
2013 64 | B | |||||||
2093 25 | B | |||||||
2197 14 | B | |||||||
2632 13 | B | |||||||
2.7E+3 2 | C | (1-) | ||||||
2720 13 | B | |||||||
2794 25 | B | |||||||
2861 24 | B | |||||||
2917 49 | B | |||||||
3053 15 | B | |||||||
3194 15 | B | |||||||
3255 19 | B | |||||||
3325 26 | B | |||||||
3400 15 | B | |||||||
3482 15 | B | |||||||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
≈4000 | C | |||||||
4285 12 | B | |||||||
5.1E+3 2 | C | (0)- | ||||||
≈5800 | C | (2+) | ||||||
7.0E+3 28 | C | (0)+ | ||||||
8.3E+3 2 | C | (2+,3+) | ||||||
13.6E+3 2 | C | (1)+ | ||||||
16.5E+3 20 | C | |||||||
20.4E+3 20 | C |
Jπ(level): From the shell model, one expects a 4+, 5+ doublet with configuration=ν2g9/2π3s1/2-1 as ground state and low-lying excited level followed by the 3+, 4+, 5+, 6+ multiplet with configuration=ν2g9/2π2d3/2-1 at ≈400-keV excitation. Both configurations are expected to Be fed in 212Bi α decay. Within the framework of this expected multiplet picture, given Jπ=5+ for the 328 level, the 474, 493, and 620 levels, which have the strongest α feedings, may have Jπ=4+, 3+, and 6+, respectively. These assignments are consistent with α-decay systematics (1980Sc26). See 1992Ar05 for details on αγ(θ)
I(γ): Relative photon branching from each level. Data are from 60.55-min 212Bi α decay. Additional data are available from β- decay, but are discrepant with those from α decay and are not adopted
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
39.858 | 4+ | 6.5 ps 8 | 39.858 4 | M1 | 24.4 | B(M1)(W.u.)=2.1 3, α=24.4 |
328.04 | 5+ | > 0.1 ps | 288.20 4 | M1 | 0.455 | B(M1)(W.u.)<4.7, α=0.455 |
5+ | > 0.1 ps | 328.03 4 | M1 | 0.320 | B(M1)(W.u.)<1.3, α=0.320 | |
473.4 | (4+) | 433.7 5 | (M1) | 0.151 | α=0.151 | |
(4+) | 473.0 7 | (M1) | 0.120 | α=0.120 | ||
492.84 | (3)+ | 452.98 5 | M1 | 0.135 | α=0.135 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 5+ | 3.053 m 4 % β- = 100 | μ=0.292 13 (1992La03,2005St24) configuration: μ is larger than expected for a pure configuration=ν2g9/2π3s1/2-1 5+ state. 1992La03 point out that a 25% admixture of configuration=ν2g9/2π2d3/2-1 would explain the reduction in μ; however, this admixture leads to disagreement with the 208Tl-207Tl rms radius change. |
E(level) | E(gamma) | Comments |
492.84 | 164.0 | E(γ): reported in β- decay with Iγ/Iγ(433γ)=0.48, but this transition is not seen in α decay. From the E(level) difference one expects Eγ=164.8 |