ADOPTED LEVELS, GAMMAS for 213At
Author: M. S. Basunia | Citation: Nucl. Data Sheets 181, 475 (2022) | Cutoff date: 1-Jan-2022
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-884 keV 6 | S(n)= 6023 keV 5 | S(p)= 3499 keV 5 | Q(α)= 9254 keV 5 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 217Fr α decay | B | 208Pb(7Li,2nγ),209Bi(18O,14CG) |
| C | 209Bi(7Li,p2nγ),209Bi(8He,4nγ) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | ABC | 9/2- | 125 ns 6 % α = 100 | |||||
| 340.5 3 | B | (7/2-,9/2-) | ≤ 5.5 ns | 340.5 3 | 100 | (M1,E2) | 0.0 | 9/2- |
| 724.6 3 | BC | (13/2-) | ≤ 5.5 ns | 724.6 3 | 100 | (E2) | 0.0 | 9/2- |
| 1111.3 5 | BC | (15/2-) | ≤ 5.5 ns | 386.7 3 | 100 | (M1+E2) | 724.6 | (13/2-) |
| 1129.7 5 | BC | (17/2-) | ≤ 5.5 ns | 18.4S 405.1 3 | 100 | (E2) | 1111.3 724.6 | (15/2-) (13/2-) |
| 1318.1 6 | BC | (19/2-) | ≤ 5.5 ns | 188.4 3 | 100 | D | 1129.7 | (17/2-) |
| 1318.1+X | B | 110 ns 17 | ||||||
| 1318.1+Y | C | (27/2-) | 85 ns | |||||
| 1681+Y | C | (29/2+) | 363 | 100 | 1318.1+Y | (27/2-) | ||
| 1838+Y | C | (33/2+) | 82 ns | 156 520 | | 1681+Y 1318.1+Y | (29/2+) (27/2-) | |
| 2194+Y | C | (35/2-) | 356 | 100 | 1838+Y | (33/2+) | ||
| 2570+Y | C | (37/2-) | 376 | 100 | 2194+Y | (35/2-) | ||
| 2620+Y | C | (43/2-) | 34.7 ns | 50S | | 2570+Y | (37/2-) | |
| 2926+Y | C | (49/2+) | 45 µs 4 | 306 | 100 | [E3] | 2620+Y | (43/2-) |
E(level): From Eγ. Energy levels at 1318.1+y keV and above are from 209Bi(7Li,p2nγ). These level energies are about 235 keV less than the level energy presented in 2003LaZZ. Evaluator labeled these levels with ’+y’, because placement of some highly converted low energy γ-lines between (27/2-) and 19/2- states are not clear and the evaluator placed those gammas as unplaced in the 209Bi(7Li,p2nγ),209Bi(8He,4nγ) dataset.
Jπ(level): From γ transition multipolarity, deduced from measured γ-ray angular distribution in 208Pb(7Li,2nγ), except otherwise noted.
E(γ): From 208Pb(7Li,2nγ), except otherwise noted.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 340.5 | (7/2-,9/2-) | ≤ 5.5 ns | 340.5 3 | (M1,E2) | 0.24 | α=0.24 15, α(K)=0.18 14, α(L)=0.043 14, α(M)=0.0104 28, α(N)=0.00270 72, α(O)=5.7×10-4 17, α(P)=7.3E-5 28 |
| 724.6 | (13/2-) | ≤ 5.5 ns | 724.6 3 | (E2) | 0.01473 | α=0.01473, α(K)=0.01106 16, α(L)=0.00278 4, α(M)=0.000683 10, α(N)=0.0001766 25, α(O)=3.67×10-5 6, α(P)=4.64E-6 7 |
| 1111.3 | (15/2-) | ≤ 5.5 ns | 386.7 3 | (M1+E2) | 0.17 | α=0.17 11, α(K)=0.132 93, α(L)=0.029 11, α(M)=0.0071 23, α(N)=0.00183 59, α(O)=3.8×10-4 14, α(P)=5.0E-5 22 |
| 1129.7 | (17/2-) | ≤ 5.5 ns | 405.1 3 | (E2) | 0.0568 | α=0.0568, α(K)=0.0354 5, α(L)=0.01600 23, α(M)=0.00410 6, α(N)=0.001061 16, α(O)=0.000215 3, α(P)=2.49×10-5 4 |
| 2926+Y | (49/2+) | 45 µs 4 | 306 | [E3] | 0.707 | B(E3)(W.u.)=23 2, α=0.707, α(K)=0.1716 24, α(L)=0.393 6, α(M)=0.1075 15, α(N)=0.0280 4, α(O)=0.00558 8, α(P)=0.000600 9 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 9/2- | 125 ns 6 % α = 100 | Possible %ε decay to 213Po g.s. is expected to be <2.5×10-12 from log ft>5.1. E(level): Possible %ε decay to 213Po g.s. is expected to be <2.5×10-12 from log ft>5.1. |
| 340.5 | (7/2-,9/2-) | ≤ 5.5 ns | T1/2(level): From 208Pb(7Li,2nγ),209Bi(18O,14Cγ) (1980Sj01). |
| 724.6 | (13/2-) | ≤ 5.5 ns | Possible configuration: π (h9/2+1)#2+. T1/2(level): From 208Pb(7Li,2nγ),209Bi(18O,14Cγ) (1980Sj01). |
| 1111.3 | (15/2-) | ≤ 5.5 ns | T1/2(level): From 208Pb(7Li,2nγ),209Bi(18O,14Cγ) (1980Sj01). |
| 1129.7 | (17/2-) | ≤ 5.5 ns | Possible configuration: π (h9/2+1)#4+. T1/2(level): From 208Pb(7Li,2nγ),209Bi(18O,14Cγ) (1980Sj01). |
| 1318.1 | (19/2-) | ≤ 5.5 ns | T1/2(level): From 208Pb(7Li,2nγ),209Bi(18O,14Cγ) (1980Sj01). |
| 1318.1+Y | (27/2-) | 85 ns | Jπ(level): From 2003LaZZ (7Li,p2nγ), detailed arguments are not available. It appears that the assignment was based on the placement of gamma transitions in the level scheme following the decay of 2626+y isomer (Jπ=(49/2+)), shell model calculations, and comparison with a comparable isomer at 4771.4 (Jπ=(25-)), T1/2=152 μs 5, in 212At. T1/2(level): From time-difference spectra by gating on γ-ray transition above and below the level of interest in 209Bi(7Li,p2nγ) (2003LaZZ). |
| 1681+Y | (29/2+) | Jπ(level): From 2003LaZZ (7Li,p2nγ), detailed arguments are not available. It appears that the assignment was based on the placement of gamma transitions in the level scheme following the decay of 2626+y isomer (Jπ=(49/2+)), shell model calculations, and comparison with a comparable isomer at 4771.4 (Jπ=(25-)), T1/2=152 μs 5, in 212At. | |
| 1838+Y | (33/2+) | 82 ns | Jπ(level): From 2003LaZZ (7Li,p2nγ), detailed arguments are not available. It appears that the assignment was based on the placement of gamma transitions in the level scheme following the decay of 2626+y isomer (Jπ=(49/2+)), shell model calculations, and comparison with a comparable isomer at 4771.4 (Jπ=(25-)), T1/2=152 μs 5, in 212At. T1/2(level): From time-difference spectra by gating on γ-ray transition above and below the level of interest in 209Bi(7Li,p2nγ) (2003LaZZ). |
| 2194+Y | (35/2-) | Jπ(level): From 2003LaZZ (7Li,p2nγ), detailed arguments are not available. It appears that the assignment was based on the placement of gamma transitions in the level scheme following the decay of 2626+y isomer (Jπ=(49/2+)), shell model calculations, and comparison with a comparable isomer at 4771.4 (Jπ=(25-)), T1/2=152 μs 5, in 212At. | |
| 2570+Y | (37/2-) | Jπ(level): From 2003LaZZ (7Li,p2nγ), detailed arguments are not available. It appears that the assignment was based on the placement of gamma transitions in the level scheme following the decay of 2626+y isomer (Jπ=(49/2+)), shell model calculations, and comparison with a comparable isomer at 4771.4 (Jπ=(25-)), T1/2=152 μs 5, in 212At. | |
| 2620+Y | (43/2-) | 34.7 ns | possible configuration: π ([h9/2+2,f7/2+1]23/2-) ν ([(g9/2+1,i11/2+1]10+) (2003LaZZ). E(level): possible configuration: π ([h9/2+2,f7/2+1]23/2-) ν ([(g9/2+1,i11/2+1]10+) (2003LaZZ). Jπ(level): From 2003LaZZ (7Li,p2nγ), detailed arguments are not available. It appears that the assignment was based on the placement of gamma transitions in the level scheme following the decay of 2626+y isomer (Jπ=(49/2+)), shell model calculations, and comparison with a comparable isomer at 4771.4 (Jπ=(25-)), T1/2=152 μs 5, in 212At. T1/2(level): From time-difference spectra by gating on γ-ray transition above and below the level of interest in 209Bi(7Li,p2nγ) (2003LaZZ). |
| 2926+Y | (49/2+) | 45 µs 4 | possible configuration: π ([h9/2+2,i13/2+1]29/2+) ν ([g9/2+1,i11/2+1]10+) (2003LaZZ). 306γ [E3] to 43/2- state. E(level): possible configuration: π ([h9/2+2,i13/2+1]29/2+) ν ([g9/2+1,i11/2+1]10+) (2003LaZZ). 306γ [E3] to 43/2- state. Jπ(level): From 2003LaZZ (7Li,p2nγ), detailed arguments are not available. It appears that the assignment was based on the placement of gamma transitions in the level scheme following the decay of 2626+y isomer (Jπ=(49/2+)), shell model calculations, and comparison with a comparable isomer at 4771.4 (Jπ=(25-)), T1/2=152 μs 5, in 212At. |
| E(level) | E(gamma) | Comments |
| 1681+Y | 363 | E(γ): From 209Bi(7Li,p2nγ),209Bi(8He,4nγ). |
| 1838+Y | 156 | E(γ): From 209Bi(7Li,p2nγ),209Bi(8He,4nγ). | 520 | E(γ): From 209Bi(7Li,p2nγ),209Bi(8He,4nγ). |
| 2194+Y | 356 | E(γ): From 209Bi(7Li,p2nγ),209Bi(8He,4nγ). |
| 2570+Y | 376 | E(γ): From 209Bi(7Li,p2nγ),209Bi(8He,4nγ). |
| 2620+Y | 50 | E(γ): α low-energy (50-keV) unobserved γ transition was postulated to explain the observed isomer (2003LaZZ - (7Li,p2nγ)). |
| 2926+Y | 306 | E(γ): From 209Bi(7Li,p2nγ),209Bi(8He,4nγ). |
Assignment: daughter of 229Np, 225Pa, 221Ac, and 217Fr (1968Ha14,1970Bo13).
Induced fission data from 209Bi(α,f) reaction were taken, and fission barrier parameters were deduced by 1982Gr21, 1982Gr24, 1983Gr17, 1984Gr06, 1984Gr13, 1984Ig01, 1984It01, 1985It01, 1986Be20, 1986It01, 1987It03, and 1988Gr16.
2020De36: 238U(48Ca,X), E=233.3 MeV; measured multi-nucleon transfer reaction cross section σcumulative=54.0 nb/sr 12 for 213At.
2015Ba20: 136Xe + 208Pb, E(c.m.)=450 MeV, measured multi-nucleon transfer reaction cross section σcumulative yield=0.384 mb 77 and σindependent yield=0.384 mb 77 for 213At.
See 1972Mo10, 1973Ba19, 1974Ba87, 1977Ha41, 1977Pr10, 1979Ad07, 1979Ig04, 1980Ig02, 1983Br06, 1983Br15, 1984Ni09, and 1984Ro23 for calculations of fission barriers and probabilities for decay by fission. Effective moment of inertia was calculated by 1982Ad01.