ADOPTED LEVELS, GAMMAS for 208At
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-)=-2814 keV 15 | S(n)= 7314 keV 16 | S(p)= 2613 keV 12 | Q(α)= 5751.0 keV 22 | ||
Reference: 2012WA38 |
References: | |||
A | 212Fr α decay | B | 208Rn ε decay |
C | 209Bi(α,5nγ) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | ABC | 6+ | 1.63 h 3 % ε = 99.45 6 % α = 0.55 6 | |||||
23.527 20 | AB | (5)+ | 23.53 2 | | M1(+E2) | 0.0 | 6+ | |
63.695 22 | AB | (4)+ | 40.17 1 | | M1(+E2) | 23.527 | (5)+ | |
71.83 16 | A C | 7+ | 71.9 2 | | M1 | 0.0 | 6+ | |
113.784 24 | AB | (3)+ | 50.09 1 | | M1(+E2) | 63.695 | (4)+ | |
147.95 7 | A | 5+ | 84.1 5 124.5 1 147.9 1 | 76 24 100 10 5 1 | [M1] M1 (M1+E2) | 63.695 23.527 0.0 | (4)+ (5)+ 6+ | |
173.75 3 | B | (2)+ | 59.96 1 | | M1(+E2) | 113.784 | (3)+ | |
208.12 4 | AB | (4,5)+ | 144.44 3 184.56 5 | 100 75 11 | M1(+E2) M1(+E2) | 63.695 23.527 | (4)+ (5)+ | |
227.16 7 | A | (4+,5,6+) | 163.5 2 203.7 1 227.2 1 | 6 2 51 4 100 3 | 63.695 23.527 0.0 | (4)+ (5)+ 6+ | ||
237.22 4 | AB | (4)+ | 123.42 3 173.50 6 213.61 10 | 49 7 100 10 53 6 | M1+E2 M1(+E2) M1+E2 | 113.784 63.695 23.527 | (3)+ (4)+ (5)+ | |
283.62 7 | A | (4+,5+) | 169.9 2 219.9 1 260.1 1 283.2 5 | 99 9 53 6 100 5 2 1 | 113.784 63.695 23.527 0.0 | (3)+ (4)+ (5)+ 6+ | ||
334.71 7 | A | (4+,5,6+) | 271.0 2 311.2 1 334.7 1 | 35 4 31 3 100 6 | 63.695 23.527 0.0 | (4)+ (5)+ 6+ | ||
424.83 4 | B | (3)+ | 187.52 5 251.05 4 | 5.1 8 100.0 24 | M1(+E2) M1(+E2) | 237.22 173.75 | (4)+ (2)+ | |
429.47 13 | A | 202.3 8 281.6 2 357.7 2 405.8 2 | 28 20 100 13 65 14 77 14 | 227.16 147.95 71.83 23.527 | (4+,5,6+) 5+ 7+ (5)+ | |||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
588.36 10 | A | (4+,5,6+) | 304.7 2 361.30 10 440.6 7 524.2 3 587.9 3 | 40 18 100 14 24 8 75 17 53 13 | M1(+E2) | 283.62 227.16 147.95 63.695 0.0 | (4+,5+) (4+,5,6+) 5+ (4)+ 6+ | |
600.53 3 | B | (2,3)+ | 426.78 2 486.79 3 | 100 3 22.1 10 | M1(+E2) M1+E2 | 173.75 113.784 | (2)+ (3)+ | |
681.7 5 | A | 681.7 5 | | 0.0 | 6+ | |||
734.20 3 | B | (2,3)+ | 560.42 2 620.47 3 | 100 4 99 6 | (M1+E2) M1+E2 | 173.75 113.784 | (2)+ (3)+ | |
788.4 | C | 8+ | 716.7 788.2 | 19 100 | M1 E2 | 71.83 0.0 | 7+ 6+ | |
853.41 5 ? | B | (2,3,4)+ | 739.62 4 | 100 | M1(+E2) | 113.784 | (3)+ | |
904.0 | C | 9+ | 115.7 832.2 | 0.9 100 | [M1] E2 | 788.4 71.83 | 8+ 7+ | |
904.47 5 | B | 169.7 5 479.65 2 731.7 10 | 5.8 15 100 3 7.1 13 | [M1] M1+E2 | 734.20 424.83 173.75 | (2,3)+ (3)+ (2)+ | ||
1090.5 | C | 10- | 47.8 ns 10 | 186.5 1018.5 | 100 ≈0.7 | E1 | 904.0 71.83 | 9+ 7+ |
1255.7 | C | 10+ | 351.9 467.1 | 9.9 100 | (M1) E2 | 904.0 788.4 | 9+ 8+ | |
1299.9 | C | 11+ | 44.5 396.0 | 3.6 100 | M1(+E2) E2 | 1255.7 904.0 | 10+ 9+ | |
1376.1 | C | 12+ | 76.2 | | M1 | 1299.9 | 11+ | |
1525.5 | C | (13)+ | 149.4 226.0 | 100 ≤28 | M1 (E2) | 1376.1 1299.9 | 12+ 11+ | |
1539.83 5 | B | 805.24 3 ? 939.30 3 | 94 4 100 3 | (E2) M1+E2 | 734.20 600.53 | (2,3)+ (2,3)+ | ||
1544.7 | C | 11- | 454.2 | | M1 | 1090.5 | 10- | |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1648.7 | C | 12- | 104.2 558.2 | ≤1.4 ≈100 | (M1) E2 | 1544.7 1090.5 | 11- 10- | |
1804.2 | C | 13+ | 278.7 | | M1 | 1525.5 | (13)+ | |
1826.61 5 | B | 1226.08 4 | 100 | E1(+M2) | 600.53 | (2,3)+ | ||
1979.48 6 ? | B | 1125.1 20 1378.95 5 | 7.5 14 100 5 | E1(+M2) | 853.41 600.53 | (2,3,4)+ (2,3)+ | ||
2194.2 | C | 545.6 | | 1648.7 | 12- | |||
2226.7 | C | 577.8 701.3 | ≤100 20 | 1648.7 1525.5 | 12- (13)+ | |||
2268.8 | C | 13- | 42.1 620.1 | | D M1+E2 | 2226.7 1648.7 | 12- | |
2270.15 5 | B | 1365.69 7 1669.86 7 1845.30 6 | 79 3 21 3 100 4 | E2(+M1) | 904.47 600.53 424.83 | (2,3)+ (3)+ | ||
2276.4 | C | 16- | 1.5 µs 2 | 472.2 750.9 | 81 100 | E3 E3 | 1804.2 1525.5 | 13+ (13)+ |
2371.8 | C | 567.5 | | 1804.2 | 13+ | |||
2480.4 | C | 253.6 286.3 | 43 100 | (M1) (M1) | 2226.7 2194.2 | |||
2576.7 2 ? | B | 306.77 4 ? 2151.65 8 ? | 100 10 22 3 | M1(+E2) | 2270.15 424.83 | (3)+ | ||
2717.1 | C | 345.2 490.5 | 87 100 | M1 M1 | 2371.8 2226.7 | |||
2745.4 | C | 17- | 469.1 | | M1 | 2276.4 | 16- | |
2768.7 | C | 288.2 542.1 | 64 ≤100 | (M1) M1 | 2480.4 2226.7 | |||
2771.4 | C | 14- | 54.3 502.6 | | D M1 | 2717.1 2268.8 | 13- | |
2801.7 | C | (15,16) | 575.0 | | 2226.7 | |||
2829.6? | C | 17- | 553.1? | | M1 | 2276.4 | 16- | |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
2935.9 | C | 106.1 190.6 | | 2829.6 2745.4 | 17- 17- | |||
3123.1 | C | 354.4 | | 2768.7 | ||||
3269.0 | C | 145.9 | | 3123.1 | ||||
3283.6 | C | 481.9 | | 2801.7 | (15,16) | |||
3307.7 | C | 184.1 | | 3123.1 | ||||
3315.9 | C | 544.5 | | 2771.4 | 14- | |||
3333.2 | C | 64.2 | | D | 3269.0 | |||
3460.3 | C | 630.7 | | 2829.6 | 17- | |||
3479.3 | C | 733.9 | | 2745.4 | 17- | |||
3547.0? | C | 611.1? | | 2935.9 | ||||
3867.0 | C | 533.8 | | (M1) | 3333.2 | |||
4366.9 | C | 499.9 | | 3867.0 |
E(level): E(level) data with ΔE<0.5 keV are from 208Rn ε decay. Others are from 212Fr α decay. Values without uncertainties are from 209Bi(α,5nγ)
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
23.527 | (5)+ | 23.53 2 | M1(+E2) | 0.028 LE | 166 | α=166 3 | |
63.695 | (4)+ | 40.17 1 | M1(+E2) | 0.026 LE | 33.8 | α=33.8 2 | |
71.83 | 7+ | 71.9 2 | M1 | 6.065 | α=6.065 | ||
113.784 | (3)+ | 50.09 1 | M1(+E2) | 0.046 LE | 18.6 | α=18.6 2 | |
147.95 | 5+ | 84.1 5 | [M1] | 3.84 | α=3.84 | ||
5+ | 124.5 1 | M1 | 6.48 | α=6.48 | |||
5+ | 147.9 1 | (M1+E2) | 2.3 AP | 2.0 | α2.0 AP | ||
173.75 | (2)+ | 59.96 1 | M1(+E2) | 0.070 LE | 11.0 | α=11.0 2 | |
208.12 | (4,5)+ | 144.44 3 | M1(+E2) | 0.92 LE | 3.7 | α=3.7 6 | |
(4,5)+ | 184.56 5 | M1(+E2) | 0.89 LE | 1.8 | α=1.8 4 | ||
237.22 | (4)+ | 123.42 3 | M1+E2 | 0.7 3 | 5.7 | α=5.7 8 | |
(4)+ | 173.50 6 | M1(+E2) | 0.6 LE | 2.5 | α=2.5 4 | ||
(4)+ | 213.61 10 | M1+E2 | 3.3 +17-8 | 0.49 | α=0.49 6 | ||
424.83 | (3)+ | 187.52 5 | M1(+E2) | 0.54 LE | 2.03 | α=2.03 24 | |
(3)+ | 251.05 4 | M1(+E2) | 0.44 LE | 0.91 | α=0.91 9 | ||
588.36 | (4+,5,6+) | 361.30 10 | M1(+E2) | 0.46 LE | 0.309 | α=0.309 23 | |
600.53 | (2,3)+ | 426.78 2 | M1(+E2) | 0.28 LE | 0.22 | α=0.22 1 | |
(2,3)+ | 486.79 3 | M1+E2 | 1.0 5 | 0.10 | α=0.10 3 | ||
734.20 | (2,3)+ | 560.42 2 | (M1+E2) | 0.07 | α=0.07 4 | ||
(2,3)+ | 620.47 3 | M1+E2 | 1.1 5 | 0.05 | α=0.05 2 | ||
788.4 | 8+ | 716.7 | M1 | 0.057 | α=0.057 | ||
8+ | 788.2 | E2 | 0.013 | α=0.013 | |||
853.41 | (2,3,4)+ | 739.62 4 | M1(+E2) | 1.3 LE | 0.040 | α=0.040 12 | |
904.0 | 9+ | 115.7 | [M1] | 8.4 | α=8.4 | ||
9+ | 832.2 | E2 | 0.011 | α=0.011 | |||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
904.47 | 169.7 5 | [M1] | 2.81 | α=2.81 | |||
479.65 2 | M1+E2 | 0.66 24 | 0.125 | α=0.125 20 | |||
1090.5 | 10- | 47.8 ns 10 | 186.5 | E1 | 0.100 | B(E1)(W.u.)=5.9E-7, α=0.100 | |
1255.7 | 10+ | 467.1 | E2 | 0.040 | α=0.040 | ||
1299.9 | 11+ | 44.5 | M1(+E2) | 26.0 | α=26.0 | ||
11+ | 396.0 | E2 | 0.061 | α=0.061 | |||
1376.1 | 12+ | 76.2 | M1 | 5.39 | α=5.39 | ||
1525.5 | (13)+ | 149.4 | M1 | 4.05 | α=4.05 | ||
1539.83 | 805.24 3 | (E2) | 0.012 | α=0.012 | |||
939.30 3 | M1+E2 | 1.7 5 | 0.014 | α=0.014 3 | |||
1648.7 | 12- | 558.2 | E2 | 0.026 | α=0.026 | ||
1804.2 | 13+ | 278.7 | M1 | 0.708 | α=0.708 | ||
1826.61 | 1226.08 4 | E1(+M2) | 0.22 LE | ||||
1979.48 | 1378.95 5 | E1(+M2) | 0.28 LE | ||||
2270.15 | 1365.69 7 | E2(+M1) | 2.2 GE | ||||
2276.4 | 16- | 1.5 µs 2 | 472.2 | E3 | 0.143 | B(E3)(W.u.)=25, α=0.143 | |
16- | 1.5 µs 2 | 750.9 | E3 | 0.037 | B(E3)(W.u.)=1.2, α=0.037 | ||
2576.7 | 306.77 4 | M1(+E2) | 0.8 LE | 0.49 | α=0.49 11 | ||
2829.6 | 17- | 553.1 | M1 | 0.112 | α=0.112 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 6+ | 1.63 h 3 % ε = 99.45 6 % α = 0.55 6 | configuration=π1h9/2ν2f5/2-1 is suggested by 1981Va29. |
23.527 | (5)+ | configuration=π1h9/2ν2f5/2-1 is suggested by 1981Va29. E(level): From 212Fr α decay. Jπ(level): The M1 character of the 23.5, 40.2, 50.1 and 60.0 γ’s, the strong feeding of this cascade of transitions in 208Rn ε decay (J=0+), and the absence of crossover transitions from the 63.7, 113.8 and 173.8 levels suggest that these levels form a monotonically decreasing ΔJ=1, π=+ spin sequence built on the J=6+ ground state. | |
63.695 | (4)+ | configuration=π1h9/2ν2f5/2-1 is suggested by 1981Va29. E(level): From 212Fr α decay. Jπ(level): The M1 character of the 23.5, 40.2, 50.1 and 60.0 γ’s, the strong feeding of this cascade of transitions in 208Rn ε decay (J=0+), and the absence of crossover transitions from the 63.7, 113.8 and 173.8 levels suggest that these levels form a monotonically decreasing ΔJ=1, π=+ spin sequence built on the J=6+ ground state. | |
71.83 | 7+ | configuration=π1h9/2ν2f5/2-1 is suggested by 1981Va29. | |
113.784 | (3)+ | E(level): From 212Fr α decay. Jπ(level): The M1 character of the 23.5, 40.2, 50.1 and 60.0 γ’s, the strong feeding of this cascade of transitions in 208Rn ε decay (J=0+), and the absence of crossover transitions from the 63.7, 113.8 and 173.8 levels suggest that these levels form a monotonically decreasing ΔJ=1, π=+ spin sequence built on the J=6+ ground state. | |
173.75 | (2)+ | E(level): From 212Fr α decay. Jπ(level): The M1 character of the 23.5, 40.2, 50.1 and 60.0 γ’s, the strong feeding of this cascade of transitions in 208Rn ε decay (J=0+), and the absence of crossover transitions from the 63.7, 113.8 and 173.8 levels suggest that these levels form a monotonically decreasing ΔJ=1, π=+ spin sequence built on the J=6+ ground state. | |
1090.5 | 10- | 47.8 ns 10 | μ=+2.69 3 (1985No09,2005St24) configuration=π1h9/2ν1i13/2-1 (1985No09, 1984Fa10). |
1376.1 | 12+ | Jπ(level): The cascade from the 2276 level to the 1300 level via the 750.9 E3 γ, 149.4 M1, ΔJ=1 γ, and the 76.2 M1 γ, given Jπ=11+ for the 1300 level, and the absence of any crossover transitions from these levels to levels with J<11, establishes Jπ=16-, 13+, and 12+ for the 2276, 1526, and 1376 levels, respectively. | |
1525.5 | (13)+ | Jπ(level): The cascade from the 2276 level to the 1300 level via the 750.9 E3 γ, 149.4 M1, ΔJ=1 γ, and the 76.2 M1 γ, given Jπ=11+ for the 1300 level, and the absence of any crossover transitions from these levels to levels with J<11, establishes Jπ=16-, 13+, and 12+ for the 2276, 1526, and 1376 levels, respectively. | |
2194.2 | Jπ(level): 1984Fa10, in 209Bi(α,5nγ), have proposed Jπ assignments for several cascades feeding into the 2226 level. The arguments are complex and two of the arguments, in particular, do not seem to Be justified by the data. The authors assign mult=M1 for the 42γ from the 2269 level, based on the non-measurable halflife (<1 ns). B(E2)(W.u.)>120 rules out mult=E2; however, while B(M1)(W.u.)>0.01 is consistent with mult=M1, B(E1)(W.u.)>0.001 does not rule out mult=E1. Second, the authors assign the 545.6γ feeding the 12- 1649 level as being a stretched dipole; however, in their table 1, the 545.6γ is not resolved from the 544.5γ, and no angular distribution or conversion data are given. The authors may have additional data not mentioned in the paper. Please see the authors’ paper for detailed Jπ arguments for the indicated levels. The authors give a thorough discussion on the probable configurations of many of the 208At levels. | ||
2226.7 | Jπ(level): 1984Fa10, in 209Bi(α,5nγ), have proposed Jπ assignments for several cascades feeding into the 2226 level. The arguments are complex and two of the arguments, in particular, do not seem to Be justified by the data. The authors assign mult=M1 for the 42γ from the 2269 level, based on the non-measurable halflife (<1 ns). B(E2)(W.u.)>120 rules out mult=E2; however, while B(M1)(W.u.)>0.01 is consistent with mult=M1, B(E1)(W.u.)>0.001 does not rule out mult=E1. Second, the authors assign the 545.6γ feeding the 12- 1649 level as being a stretched dipole; however, in their table 1, the 545.6γ is not resolved from the 544.5γ, and no angular distribution or conversion data are given. The authors may have additional data not mentioned in the paper. Please see the authors’ paper for detailed Jπ arguments for the indicated levels. The authors give a thorough discussion on the probable configurations of many of the 208At levels. | ||
2276.4 | 16- | 1.5 µs 2 | Q=1.7 3 (1991Sc15,2005St24) configuration=π1h{9/2+2π1i13/2ν3p1/2-2ν2f5/2-1 is suggested by 1991Sc15 based on a comparison of a calculated Q with the measured value. Jπ(level): The cascade from the 2276 level to the 1300 level via the 750.9 E3 γ, 149.4 M1, ΔJ=1 γ, and the 76.2 M1 γ, given Jπ=11+ for the 1300 level, and the absence of any crossover transitions from these levels to levels with J<11, establishes Jπ=16-, 13+, and 12+ for the 2276, 1526, and 1376 levels, respectively. |
2371.8 | Jπ(level): 1984Fa10, in 209Bi(α,5nγ), have proposed Jπ assignments for several cascades feeding into the 2226 level. The arguments are complex and two of the arguments, in particular, do not seem to Be justified by the data. The authors assign mult=M1 for the 42γ from the 2269 level, based on the non-measurable halflife (<1 ns). B(E2)(W.u.)>120 rules out mult=E2; however, while B(M1)(W.u.)>0.01 is consistent with mult=M1, B(E1)(W.u.)>0.001 does not rule out mult=E1. Second, the authors assign the 545.6γ feeding the 12- 1649 level as being a stretched dipole; however, in their table 1, the 545.6γ is not resolved from the 544.5γ, and no angular distribution or conversion data are given. The authors may have additional data not mentioned in the paper. Please see the authors’ paper for detailed Jπ arguments for the indicated levels. The authors give a thorough discussion on the probable configurations of many of the 208At levels. | ||
2480.4 | Jπ(level): 1984Fa10, in 209Bi(α,5nγ), have proposed Jπ assignments for several cascades feeding into the 2226 level. The arguments are complex and two of the arguments, in particular, do not seem to Be justified by the data. The authors assign mult=M1 for the 42γ from the 2269 level, based on the non-measurable halflife (<1 ns). B(E2)(W.u.)>120 rules out mult=E2; however, while B(M1)(W.u.)>0.01 is consistent with mult=M1, B(E1)(W.u.)>0.001 does not rule out mult=E1. Second, the authors assign the 545.6γ feeding the 12- 1649 level as being a stretched dipole; however, in their table 1, the 545.6γ is not resolved from the 544.5γ, and no angular distribution or conversion data are given. The authors may have additional data not mentioned in the paper. Please see the authors’ paper for detailed Jπ arguments for the indicated levels. The authors give a thorough discussion on the probable configurations of many of the 208At levels. | ||
2717.1 | Jπ(level): 1984Fa10, in 209Bi(α,5nγ), have proposed Jπ assignments for several cascades feeding into the 2226 level. The arguments are complex and two of the arguments, in particular, do not seem to Be justified by the data. The authors assign mult=M1 for the 42γ from the 2269 level, based on the non-measurable halflife (<1 ns). B(E2)(W.u.)>120 rules out mult=E2; however, while B(M1)(W.u.)>0.01 is consistent with mult=M1, B(E1)(W.u.)>0.001 does not rule out mult=E1. Second, the authors assign the 545.6γ feeding the 12- 1649 level as being a stretched dipole; however, in their table 1, the 545.6γ is not resolved from the 544.5γ, and no angular distribution or conversion data are given. The authors may have additional data not mentioned in the paper. Please see the authors’ paper for detailed Jπ arguments for the indicated levels. The authors give a thorough discussion on the probable configurations of many of the 208At levels. | ||
2768.7 | Jπ(level): 1984Fa10, in 209Bi(α,5nγ), have proposed Jπ assignments for several cascades feeding into the 2226 level. The arguments are complex and two of the arguments, in particular, do not seem to Be justified by the data. The authors assign mult=M1 for the 42γ from the 2269 level, based on the non-measurable halflife (<1 ns). B(E2)(W.u.)>120 rules out mult=E2; however, while B(M1)(W.u.)>0.01 is consistent with mult=M1, B(E1)(W.u.)>0.001 does not rule out mult=E1. Second, the authors assign the 545.6γ feeding the 12- 1649 level as being a stretched dipole; however, in their table 1, the 545.6γ is not resolved from the 544.5γ, and no angular distribution or conversion data are given. The authors may have additional data not mentioned in the paper. Please see the authors’ paper for detailed Jπ arguments for the indicated levels. The authors give a thorough discussion on the probable configurations of many of the 208At levels. | ||
3123.1 | Jπ(level): 1984Fa10, in 209Bi(α,5nγ), have proposed Jπ assignments for several cascades feeding into the 2226 level. The arguments are complex and two of the arguments, in particular, do not seem to Be justified by the data. The authors assign mult=M1 for the 42γ from the 2269 level, based on the non-measurable halflife (<1 ns). B(E2)(W.u.)>120 rules out mult=E2; however, while B(M1)(W.u.)>0.01 is consistent with mult=M1, B(E1)(W.u.)>0.001 does not rule out mult=E1. Second, the authors assign the 545.6γ feeding the 12- 1649 level as being a stretched dipole; however, in their table 1, the 545.6γ is not resolved from the 544.5γ, and no angular distribution or conversion data are given. The authors may have additional data not mentioned in the paper. Please see the authors’ paper for detailed Jπ arguments for the indicated levels. The authors give a thorough discussion on the probable configurations of many of the 208At levels. | ||
3269.0 | Jπ(level): 1984Fa10, in 209Bi(α,5nγ), have proposed Jπ assignments for several cascades feeding into the 2226 level. The arguments are complex and two of the arguments, in particular, do not seem to Be justified by the data. The authors assign mult=M1 for the 42γ from the 2269 level, based on the non-measurable halflife (<1 ns). B(E2)(W.u.)>120 rules out mult=E2; however, while B(M1)(W.u.)>0.01 is consistent with mult=M1, B(E1)(W.u.)>0.001 does not rule out mult=E1. Second, the authors assign the 545.6γ feeding the 12- 1649 level as being a stretched dipole; however, in their table 1, the 545.6γ is not resolved from the 544.5γ, and no angular distribution or conversion data are given. The authors may have additional data not mentioned in the paper. Please see the authors’ paper for detailed Jπ arguments for the indicated levels. The authors give a thorough discussion on the probable configurations of many of the 208At levels. | ||
3283.6 | Jπ(level): 1984Fa10, in 209Bi(α,5nγ), have proposed Jπ assignments for several cascades feeding into the 2226 level. The arguments are complex and two of the arguments, in particular, do not seem to Be justified by the data. The authors assign mult=M1 for the 42γ from the 2269 level, based on the non-measurable halflife (<1 ns). B(E2)(W.u.)>120 rules out mult=E2; however, while B(M1)(W.u.)>0.01 is consistent with mult=M1, B(E1)(W.u.)>0.001 does not rule out mult=E1. Second, the authors assign the 545.6γ feeding the 12- 1649 level as being a stretched dipole; however, in their table 1, the 545.6γ is not resolved from the 544.5γ, and no angular distribution or conversion data are given. The authors may have additional data not mentioned in the paper. Please see the authors’ paper for detailed Jπ arguments for the indicated levels. The authors give a thorough discussion on the probable configurations of many of the 208At levels. | ||
3315.9 | Jπ(level): 1984Fa10, in 209Bi(α,5nγ), have proposed Jπ assignments for several cascades feeding into the 2226 level. The arguments are complex and two of the arguments, in particular, do not seem to Be justified by the data. The authors assign mult=M1 for the 42γ from the 2269 level, based on the non-measurable halflife (<1 ns). B(E2)(W.u.)>120 rules out mult=E2; however, while B(M1)(W.u.)>0.01 is consistent with mult=M1, B(E1)(W.u.)>0.001 does not rule out mult=E1. Second, the authors assign the 545.6γ feeding the 12- 1649 level as being a stretched dipole; however, in their table 1, the 545.6γ is not resolved from the 544.5γ, and no angular distribution or conversion data are given. The authors may have additional data not mentioned in the paper. Please see the authors’ paper for detailed Jπ arguments for the indicated levels. The authors give a thorough discussion on the probable configurations of many of the 208At levels. | ||
3333.2 | Jπ(level): 1984Fa10, in 209Bi(α,5nγ), have proposed Jπ assignments for several cascades feeding into the 2226 level. The arguments are complex and two of the arguments, in particular, do not seem to Be justified by the data. The authors assign mult=M1 for the 42γ from the 2269 level, based on the non-measurable halflife (<1 ns). B(E2)(W.u.)>120 rules out mult=E2; however, while B(M1)(W.u.)>0.01 is consistent with mult=M1, B(E1)(W.u.)>0.001 does not rule out mult=E1. Second, the authors assign the 545.6γ feeding the 12- 1649 level as being a stretched dipole; however, in their table 1, the 545.6γ is not resolved from the 544.5γ, and no angular distribution or conversion data are given. The authors may have additional data not mentioned in the paper. Please see the authors’ paper for detailed Jπ arguments for the indicated levels. The authors give a thorough discussion on the probable configurations of many of the 208At levels. | ||
3867.0 | Jπ(level): 1984Fa10, in 209Bi(α,5nγ), have proposed Jπ assignments for several cascades feeding into the 2226 level. The arguments are complex and two of the arguments, in particular, do not seem to Be justified by the data. The authors assign mult=M1 for the 42γ from the 2269 level, based on the non-measurable halflife (<1 ns). B(E2)(W.u.)>120 rules out mult=E2; however, while B(M1)(W.u.)>0.01 is consistent with mult=M1, B(E1)(W.u.)>0.001 does not rule out mult=E1. Second, the authors assign the 545.6γ feeding the 12- 1649 level as being a stretched dipole; however, in their table 1, the 545.6γ is not resolved from the 544.5γ, and no angular distribution or conversion data are given. The authors may have additional data not mentioned in the paper. Please see the authors’ paper for detailed Jπ arguments for the indicated levels. The authors give a thorough discussion on the probable configurations of many of the 208At levels. |
E(level) | E(gamma) | Comments |
71.83 | 71.9 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay |
147.95 | 84.1 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 124.5 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 147.9 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay |
208.12 | 144.44 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 184.56 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay |
227.16 | 163.5 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 203.7 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 227.2 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay |
237.22 | 213.61 | I(γ): Iγ:Iγ(173γ)=84 10:100 9 in 212Fr α decay |
283.62 | 169.9 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 219.9 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 260.1 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay |
334.71 | 271.0 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 311.2 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 334.7 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay |
429.47 | 202.3 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 281.6 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 357.7 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 405.8 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay |
588.36 | 304.7 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 440.6 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 524.2 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay | 587.9 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay |
681.7 | 681.7 | E(γ): From 212Fr α decay I(γ): From 212Fr α decay |
E(level) | E(gamma) | Comments |
Gammas: γ data with uncertainties are from 208Rn ε decay, except where from 212Fr α decay as noted. Eγ and Iγ data without uncertainties are from 209Bi(α,5nγ) as are the multipolarity data for these transitions
Q-value: Note: Current evaluation has used the following Q record -2843 28 7320 34 2634 27 5751.0 22 2003Au03