ADOPTED LEVELS, GAMMAS for 237Pu
Author: M. S. Basunia | Citation: Nucl. Data Sheets 107, 2323 (2006) | Cutoff date: 15-Mar-2006
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-1.48×103 keV SY | S(n)= 5880.7 keV 21 | S(p)= 5.57×103 keV 5 | Q(α)= 5748.3 keV 23 | ||
Reference: 2012WA38 |
References: | |||
A | 241Cm α decay | B | 237Am ε decay |
C | 238Pu(d,t) | D | 239Pu(p,t) |
E | 237Pu IT decay (0.18 S) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | ABC E | 7/2- | 45.64 d 4 % ε = 99.9958 4 % α = 0.0042 4 | |||||
47.71 4 | ABC | 9/2- | 47.71 4 | 100 | M1+E2 | 0.0 | 7/2- | |
106 5 | A C | 11/2- | ||||||
145.543 8 | ABCDE | 1/2+ | 0.18 s 2 % IT = 100 | 145.542 8 | 100 | E3 | 0.0 | 7/2- |
155.456 12 | ABC | 3/2+ | 9.903 16 | 100 | M1+E2 | 145.543 | 1/2+ | |
175 7 | A C | 13/2- | ||||||
201.179 12 | ABCD | 5/2+ | 45.724 8 55.638 11 | 46 12 100 16 | M1+E2 (E2) | 155.456 145.543 | 3/2+ 1/2+ | |
224.25 5 | ABCD | 7/2+ | 68.8 1 | 100 | (E2) | 155.456 | 3/2+ | |
257 | C | 15/2- | ||||||
280.222 14 | BC | 5/2+ | 79.05 2 124.72 3 280.23 2 | 0.42 7 0.59 11 100 5 | (M1) (M1) E1 | 201.179 155.456 0.0 | 5/2+ 3/2+ 7/2- | |
304 4 | A CD | 9/2+ | ||||||
320.970 16 | B | 7/2+ | 40.748 6 273.3 1 321.0 1 | 2.0 4 54 4 100 8 | M1+E2 E1 | 280.222 47.71 0.0 | 5/2+ 9/2- 7/2- | |
370.40 4 | AB | 3/2+ | 214.9 2 224.86 4 | 100 21 100 21 | (M1) (M1) | 155.456 145.543 | 3/2+ 1/2+ | |
371 5 | C | 9/2+ | ||||||
404.19 5 | ABC | 5/2+ | 123.8 3 179.94 2 203.03 5 248.7 2 | ≈7 41 9 71 9 100 10 | (M1(+E2)) M1(+E2) (M1(+E2)) | 280.222 224.25 201.179 155.456 | 5/2+ 7/2+ 5/2+ 3/2+ | |
407.82 6 | BCD | 5/2+ | 127.5 2 183.7 2 206.7 1 252.2 2 407.8 1 | 17 4 30 8 52 7 43 12 100 8 | M1(+E2) M1(+E2) M1(+E2) (E1) | 280.222 224.25 201.179 155.456 0.0 | 5/2+ 7/2+ 5/2+ 3/2+ 7/2- | |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
438.41 7 | BC | 7/2+ | 158.3 3 390.7 1 438.4 1 | 0.8 3 6.6 5 100 5 | E1 E1 | 280.222 47.71 0.0 | 5/2+ 9/2- 7/2- | |
453.29 14 | BC | 7/2+ | 229.1 3 252.2 2 453.2 3 | 100 34 100 34 67 14 | 224.25 201.179 0.0 | 7/2+ 5/2+ 7/2- | ||
473.52 7 | BC | 7/2+ | 193.4 3 425.8 1 473.5 1 | 2.1 7 45 3 100 7 | E1 E1 | 280.222 47.71 0.0 | 5/2+ 9/2- 7/2- | |
486 | C | (9/2+) | ||||||
513 | C | 9/2+ | ||||||
545 | C | (1/2-) | ||||||
582 | C | (5/2-) | ||||||
591 | C | (3/2-) | ||||||
655 | C | |||||||
655.39 15 | BC | (5/2)- | 655.3 2 | 100 | M1 | 0.0 | 7/2- | |
691 | C | (7/2-) | ||||||
696.14 15 | B | 7/2- | 40.748 6 648.5 3 696.2 3 | 100 16 77 16 | M1 M1 | 655.39 47.71 0.0 | (5/2)- 9/2- 7/2- | |
716 | C | |||||||
741 | C | |||||||
757 | C | |||||||
775 | C | |||||||
800 2 | D | 1/2+ | ||||||
809 | C | |||||||
840 | C | |||||||
851 5 | D | 3/2+,5/2+ | ||||||
852 | C | |||||||
884 | C | |||||||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
908.90 12 | B | 7/2+ | 435.2 3 455.8 3 501.2 3 504.8 3 861.2 3 908.8 2 | 9.6 16 3.5 8 10.8 16 7.3 16 14.2 16 100 6 | M1 M1 M1 M1 | 473.52 453.29 407.82 404.19 47.71 0.0 | 7/2+ 7/2+ 5/2+ 5/2+ 9/2- 7/2- | |
933 | C | |||||||
964 | C | |||||||
998 5 | CD | |||||||
1000.6 3 | BC | 3/2+,5/2,7/2 | 720.4 5 1000.6 3 | 100 21 79 21 | 280.222 0.0 | 5/2+ 7/2- | ||
1014 | C | |||||||
1025 3 | D | |||||||
1053 | C | |||||||
1104 | C | |||||||
1189 | C | |||||||
1216 | C | |||||||
1250 | C | |||||||
1264 | C | |||||||
1348 | C | |||||||
1383 | C | |||||||
1397 | C | |||||||
1463 | C | |||||||
1481 | C | |||||||
1534 | C | |||||||
26.0E+2 20 | 97 ns 4 % SF > 0 | |||||||
29.0E+2 25 | 1.1 µs 1 % SF > 0 |
E(level): From a least squares fit to the adopted γ-ray energies.
Jπ(level): Assignments are based on the measured absolute cross sections in (d,t) data, expected pattern of the rotational bands, and deduced L transfer values.
E(γ): Except for 145.544γ, all energies are from 237Am ε decay.
I(γ): From 237Am ε decay.
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - 7/2[743] band. | |||||||
0.0 | 7/2- | 45.64 d 4 % ε = 99.9958 4 % α = 0.0042 4 | |||||
47.71 4 | 9/2- | 47.71 4 | 100 | M1+E2 | 0.0 | 7/2- | |
106 5 | 11/2- | ||||||
175 7 | 13/2- | ||||||
257 | 15/2- | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 2 - 1/2[631] band. | |||||||
145.543 8 | 1/2+ | 0.18 s 2 % IT = 100 | |||||
155.456 12 | 3/2+ | 9.903 16 | 100 | M1+E2 | 145.543 | 1/2+ | |
201.179 12 | 5/2+ | ||||||
224.25 5 | 7/2+ | 68.8 1 | 100 | (E2) | 155.456 | 3/2+ | |
304 4 | 9/2+ | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 3 - 5/2[622] band. | |||||||
280.222 14 | 5/2+ | ||||||
320.970 16 | 7/2+ | 40.748 6 273.3 1 321.0 1 | 2.0 4 54 4 100 8 | M1+E2 E1 | 280.222 47.71 0.0 | 5/2+ 9/2- 7/2- | |
371 5 | 9/2+ | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 4 - 3/2[631] band. | |||||||
370.40 4 | 3/2+ | ||||||
404.19 5 | 5/2+ | 123.8 3 179.94 2 203.03 5 248.7 2 | ≈7 41 9 71 9 100 10 | (M1(+E2)) M1(+E2) (M1(+E2)) | 280.222 224.25 201.179 155.456 | 5/2+ 7/2+ 5/2+ 3/2+ | |
453.29 14 | 7/2+ | ||||||
513 | 9/2+ | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 5 - 5/2[633] band. | |||||||
407.82 6 | 5/2+ | ||||||
438.41 7 | 7/2+ | 158.3 3 390.7 1 438.4 1 | 0.8 3 6.6 5 100 5 | E1 E1 | 280.222 47.71 0.0 | 5/2+ 9/2- 7/2- | |
486 | (9/2+) | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 6 - 7/2[624] band. | |||||||
473.52 7 | 7/2+ | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 7 - 1/2[501] band. | |||||||
545 | (1/2-) | ||||||
582 | (5/2-) | ||||||
591 | (3/2-) | ||||||
691 | (7/2-) | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 8 - K=5/2 band. | |||||||
655.39 15 | (5/2)- | ||||||
696.14 15 | 7/2- | 40.748 6 648.5 3 696.2 3 | 100 16 77 16 | M1 M1 | 655.39 47.71 0.0 | (5/2)- 9/2- 7/2- | |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 9 - K=1/2 : 0+ PHONON COUPLED TO 1/2[631] STATE. | |||||||
800 2 | 1/2+ |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
47.71 | 9/2- | 47.71 4 | M1+E2 | 0.24 8 | 79 | α=79 15 | |
145.543 | 1/2+ | 0.18 s 2 % IT = 100 | 145.542 8 | E3 | 51.6 | B(E3)=0.028 4, B(E3)(W.u.)=0.028 4, α=51.6 | |
155.456 | 3/2+ | 9.903 16 | M1+E2 | 0.07 2 | 3.2×103 | α=3.2×103 10 | |
201.179 | 5/2+ | 45.724 8 | M1+E2 | 0.47 13 | 170 | α=170 60 | |
5/2+ | 55.638 11 | (E2) | 261 | α=261 | |||
224.25 | 7/2+ | 68.8 1 | (E2) | 94.2 | α=94.2 | ||
280.222 | 5/2+ | 79.05 2 | (M1) | 12.0 | α=12.0 | ||
5/2+ | 124.72 3 | (M1) | 15.1 | α=15.1 | |||
5/2+ | 280.23 2 | E1 | 0.0484 | α=0.0484 | |||
320.970 | 7/2+ | 40.748 6 | M1+E2 | 0.19 3 | 123 | α=123 14 | |
7/2+ | 321.0 1 | E1 | 0.036 | α=0.036 | |||
370.40 | 3/2+ | 214.9 2 | (M1) | 3.23 | α=3.23 | ||
3/2+ | 224.86 4 | (M1) | 2.85 | α=2.85 | |||
404.19 | 5/2+ | 179.94 2 | (M1(+E2)) | 0.7 7 | 4.0 | α=4.0 14 | |
5/2+ | 203.03 5 | M1(+E2) | 0.4 4 | 3.4 | α=3.4 5 | ||
5/2+ | 248.7 2 | (M1(+E2)) | 0.6 6 | 1.7 | α=1.7 5 | ||
407.82 | 5/2+ | 183.7 2 | M1(+E2) | 0.7 7 | 3.8 | α=3.8 13 | |
5/2+ | 206.7 1 | M1(+E2) | 0.3 3 | 3.4 | α=3.4 2 | ||
5/2+ | 252.2 2 | M1(+E2) | 0.6 6 | 1.6 | α=1.6 5 | ||
5/2+ | 407.8 1 | (E1) | 0.0218 | α=0.0218 | |||
438.41 | 7/2+ | 390.7 1 | E1 | 0.0238 | α=0.0238 | ||
7/2+ | 438.4 1 | E1 | 0.0188 | α=0.0188 | |||
473.52 | 7/2+ | 425.8 1 | E1 | 0.0200 | α=0.0200 | ||
7/2+ | 473.5 1 | E1 | 0.0161 | α=0.0161 | |||
655.39 | (5/2)- | 655.3 2 | M1 | 0.153 | α=0.153 | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
696.14 | 7/2- | 648.5 3 | M1 | 0.158 | α=0.158 | ||
7/2- | 696.2 3 | M1 | 0.131 | α=0.131 | |||
908.90 | 7/2+ | 435.2 3 | M1 | 0.462 | α=0.462 | ||
7/2+ | 455.8 3 | M1 | 0.407 | α=0.407 | |||
7/2+ | 501.2 3 | M1 | 0.315 | α=0.315 | |||
7/2+ | 504.8 3 | M1 | 0.309 | α=0.309 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 7/2- | 45.64 d 4 % ε = 99.9958 4 % α = 0.0042 4 | α branching was calculated from γ intensities measured in α and ε decays of 237Pu (1979El05) (see 237Pu α decay). %α=0.0033 3 was calculated from α activities of 237Pu, 236Pu in a source with known fractions, and K x-ray counting (1957Th10). Other: a%=0.0020 4 in 1957Ho68. E(level): α branching was calculated from γ intensities measured in α and ε decays of 237Pu (1979El05) (see 237Pu α decay). %α=0.0033 3 was calculated from α activities of 237Pu, 236Pu in a source with known fractions, and K x-ray counting (1957Th10). Other: a%=0.0020 4 in 1957Ho68. 7/2[743] band. |
47.71 | 9/2- | E(level): 7/2[743] band. | |
106 | 11/2- | E(level): 7/2[743] band. | |
145.543 | 1/2+ | 0.18 s 2 % IT = 100 | E(level): 1/2[631] band. |
155.456 | 3/2+ | E(level): 1/2[631] band. | |
175 | 13/2- | E(level): 7/2[743] band. | |
201.179 | 5/2+ | E(level): 1/2[631] band. | |
224.25 | 7/2+ | E(level): 1/2[631] band. | |
257 | 15/2- | E(level): 7/2[743] band. | |
280.222 | 5/2+ | E(level): 5/2[622] band. | |
304 | 9/2+ | E(level): 1/2[631] band. | |
320.970 | 7/2+ | E(level): 5/2[622] band. | |
370.40 | 3/2+ | E(level): 3/2[631] band. | |
371 | 9/2+ | E(level): 5/2[622] band. | |
404.19 | 5/2+ | E(level): 3/2[631] band. | |
407.82 | 5/2+ | E(level): 5/2[633] band. | |
438.41 | 7/2+ | E(level): 5/2[633] band. | |
453.29 | 7/2+ | E(level): 3/2[631] band. | |
473.52 | 7/2+ | E(level): 7/2[624] band. | |
486 | (9/2+) | E(level): 5/2[633] band. | |
513 | 9/2+ | E(level): 3/2[631] band. | |
545 | (1/2-) | E(level): 1/2[501] band. Jπ(level): From (d,t) data. | |
582 | (5/2-) | Spin assignment is tentative. E(level): Spin assignment is tentative. 1/2[501] band. Jπ(level): From (d,t) data. | |
591 | (3/2-) | E(level): 1/2[501] band. Jπ(level): From (d,t) data. | |
655 | This level, observed in (d,t) reaction, may be identical to the 655.3-keV, 5/2-, K=5/2 level observed in 237Am ε decay. See the comment on Nilsson assignment for the band based on 655.3-keV level. E(level): This level, observed in (d,t) reaction, may be identical to the 655.3-keV, 5/2-, K=5/2 level observed in 237Am ε decay. See the comment on Nilsson assignment for the band based on 655.3-keV level. | ||
E(level) | Jπ(level) | T1/2(level) | Comments |
655.39 | (5/2)- | E(level): K=5/2 band. | |
691 | (7/2-) | E(level): 1/2[501] band. Jπ(level): From (d,t) data. | |
696.14 | 7/2- | E(level): K=5/2 band. | |
800 | 1/2+ | E(level): K=1/2 : 0+ PHONON COUPLED TO 1/2[631] STATE. | |
852 | 5/2-, 5/2[503] state assignment was tentatively proposed in (d,t) dataset (1973Gr26). E(level): 5/2-, 5/2[503] state assignment was tentatively proposed in (d,t) dataset (1973Gr26). | ||
1014 | 3/2-, 3/2[501] state assignment was tentatively proposed in 1973Gr26 from (d,t) data. E(level): 3/2-, 3/2[501] state assignment was tentatively proposed in 1973Gr26 from (d,t) data. | ||
26.0E+2 | 97 ns 4 % SF > 0 | SF decay observed. Other decay mode not reported. E(level): SF decay observed. Other decay mode not reported. | |
29.0E+2 | 1.1 µs 1 % SF > 0 | Only SF decay has been observed, it is not established whether the level decays by γ to the 85Ns SF isomer or by SF only, or both. E(level): Only SF decay has been observed, it is not established whether the level decays by γ to the 85Ns SF isomer or by SF only, or both. |
E(level) | E(gamma) | Comments |
145.543 | 145.542 | E(γ): weighted average of 145.536 9 (241Cm α decay) and 145.552 12 (237Am ε decay). The unweighted average is 145.544 8. |
320.970 | 40.748 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
407.82 | 252.2 | E(γ): Multiply placed with intensity suitably divided I(γ): Multiply placed with intensity suitably divided |
453.29 | 252.2 | E(γ): Multiply placed with intensity suitably divided I(γ): Multiply placed with intensity suitably divided |
696.14 | 40.748 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
Calculation of energies and wavefunctions for nonrotational states was reported in 1971Ko31 and 1982Li02.
Levels: The configurations given below are the dominant components.
Q-value: Note: Current evaluation has used the following Q record -1480 syst 5880.7 21 5570 50 5748.4 23 2003Au03
Q-value: ΔQ(β-)=60(syst) 2003Au03