ADOPTED LEVELS, GAMMAS for 157Gd
Author: N. Nica | Citation: Nucl. Data Sheets 132, 1 (2016) | Cutoff date: 4-Dec-2015
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-60.0 keV 3 | S(n)= 6359.88 keV 15 | S(p)= 8030 keV 3 | Q(α)= -688.7 keV 4 | ||
S(2n)= 14896.23 keV 15 | S(2p)= 15210.6 keV 3 | ||||
Reference: 2017WA10 |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | ABCDEFGHIJKLMNOP | 3/2- | STABLE | |||||
54.536 6 | ABCDEFG KLMNOP | 5/2- | 130 ps 8 | 54.548 8 | 100 | M1+E2 | 0.0 | 3/2- |
63.916 5 | AB D FG IJKL NOP | 5/2+ | 0.46 µs 4 | 9.365 12 63.929 8 | 7.1 11 100 10 | E1 E1 | 54.536 0.0 | 5/2- 3/2- |
115.717 7 | AB FG KL NOP | 7/2+ | 51.834 14 | 100 | M1+E2 | 63.916 | 5/2+ | |
131.451 9 | AB DEFG JKLMNOP | 7/2- | 100 ps 10 | 67.3 76.925 14 131.438 16 | 0.9 8 100 3 30 3 | E1 M1+E2 E2 | 63.916 54.536 0.0 | 5/2+ 5/2- 3/2- |
180.229 11 | AB DEFG J LMNOP | 9/2+ | 64.4 2 116.314 28 | 100 50 30 8 | (M1+E2) | 115.717 63.916 | 7/2+ 5/2+ | |
226.983 19 | AB DEFG J LMNOP | 9/2- | 16.7 ps 15 | 95.7 2 112.8 172.37 2 | 100 4 5.7 20 72 13 | E1 [E2] | 131.451 115.717 54.536 | 7/2- 7/2+ 5/2- |
272.22 3 | F J L N P | 11/2+ | 91.96 8 156.50 4 | 100 5 58 3 | 180.229 115.717 | 9/2+ 7/2+ | ||
315 3 ? | J | |||||||
347.05 6 | E J LMNOP | 11/2- | 12.2 ps 10 | 120.1 1 166.8 215.6 1 | 75.9 18 9 3 100.0 18 | E1 [E2] | 226.983 180.229 131.451 | 9/2- 9/2+ 7/2- |
361.04 9 | J L NO | 13/2+ | 88.8 180.84 10 | 100 | 272.22 180.229 | 11/2+ 9/2+ | ||
372 3 ? | O | |||||||
426.539 23 | B L NO | 11/2- | 18.5 µs 23 % IT = 100 | 199 246.31 2 | 49 2 100 5 | [M1,E2] [E1] | 226.983 180.229 | 9/2- 9/2+ |
434.426 6 | A DEFG J LMNOP | 5/2- | < 0.1 ns | 302.994 28 318.710 8 370.509 8 379.905 9 434.388 13 | 0.61 9 26.3 13 100 5 2.39 24 3.2 3 | [M1,E2] E1 E1 [M1,E2] [M1,E2] | 131.451 115.717 63.916 54.536 0.0 | 7/2- 7/2+ 5/2+ 5/2- 3/2- |
474.630 6 | A D FGHIJ LMNOP | 3/2+ | < 0.1 ns | 358.931 15 410.723 9 420.090 9 474.625 11 | 1.72 17 100 5 5.3 4 14.4 7 | [E2] M1+E2 [E1] [E1] | 115.717 63.916 54.536 0.0 | 7/2+ 5/2+ 5/2- 3/2- |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
478.62 4 | LMN P | 13/2- | 7.3 ps 6 | 116.6 131.6 1 206.4 251.63 3 | 0.6 3 40 4 9 3 100 4 | E1 E1 [E2] | 361.04 347.05 272.22 226.983 | 13/2+ 11/2- 11/2+ 9/2- |
508.93 11 | L OP | 15/2+ | 147.93 11 236.62 16 | 68 11 100 5 | 361.04 272.22 | 13/2+ 11/2+ | ||
514.671 8 | A DEFG J LMNOP | 7/2- | 334.441 10 383.17 3 398.953 9 450.761 10 517 | 62 4 5.3 8 100 5 92 6 | 180.229 131.451 115.717 63.916 0.0 | 9/2+ 7/2- 7/2+ 5/2+ 3/2- | ||
524.847 7 | A FG I L N P | 5/2+ | 344.61 6 393.408 20 409.135 10 460.923 9 470.389 26 524.835 18 | 1.3 3 4.6 5 100 5 36.2 25 7.4 7 11.3 11 | 180.229 131.451 115.717 63.916 54.536 0.0 | 9/2+ 7/2- 7/2+ 5/2+ 5/2- 3/2- | ||
566 1 | F | |||||||
579.40 8 | L N | (13/2-) | 152.86 7 | 100 | 426.539 | 11/2- | ||
607.589 15 | A FG L | 7/2(+) | 380.38 6 427.355 15 491.89 3 543.93 6 553.02 7 | 20 3 100 10 57 8 7.5 8 17.3 10 | 226.983 180.229 115.717 63.916 54.536 | 9/2- 9/2+ 7/2+ 5/2+ 5/2- | ||
612.1 5 | P | 17/2+ | 103.2 251.4 | | 508.93 361.04 | 15/2+ 13/2+ | ||
617.38 3 | J L NO | 9/2- | 345.16 6 437.06 6 501.70 4 | 48 3 42.9 22 100 7 | 272.22 180.229 115.717 | 11/2+ 9/2+ 7/2+ | ||
640.33 8 | E LM P | 15/2- | 4.3 ps 3 | 131.3 161.7 1 279.4 293.3 1 | 0.45 15 36 6 14 3 100 6 | E1 E1 [E2] | 508.93 478.62 361.04 347.05 | 15/2+ 13/2- 13/2+ 11/2- |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
655.7 5 | I | |||||||
664.44 5 | J L O | 9/2+ | 392.19 4 533.18 14 548.83 12 | 100 5 16 10 13.0 15 | 272.22 131.451 115.717 | 11/2+ 7/2- 7/2+ | ||
682.82 4 | FG J L NO | 1/2+ | 208.20 4 619 682.80 5 | 100 3 48 3 | 474.630 63.916 0.0 | 3/2+ 5/2+ 3/2- | ||
683.236 9 | A FGHI L N | 3/2+ | < 0.3 ns | 158.41 3 208.621 11 567.58 4 619.303 12 628.704 28 683.162 27 | 0.68 19 4.1 4 4.1 4 100 5 2.8 4 6.5 12 | [E2] [E1] | 524.847 474.630 115.717 63.916 54.536 0.0 | 5/2+ 3/2+ 7/2+ 5/2+ 5/2- 3/2- |
686.667 9 | A FG L | 5/2+,7/2+ | 161.820 13 212.050 25 252.3 2 506.43 3 555.23 12 570.937 13 622.751 13 632.23 5 | 5.4 11 3.9 6 2.8 14 5.2 8 2.2 4 100 5 62 4 3.0 6 | 524.847 474.630 434.426 180.229 131.451 115.717 63.916 54.536 | 5/2+ 3/2+ 5/2- 9/2+ 7/2- 7/2+ 5/2+ 5/2- | ||
701.39 4 | DEFGHIJ LMNOP | (1/2)- | 268 638? 701.39 4 | 26 6 17 4 100 13 | 434.426 63.916 0.0 | 5/2- 5/2+ 3/2- | ||
722.9 2 ? | A M OP | 607.1 2 ? 668.5 2 ? | 100 50 26 7 | 115.717 54.536 | 7/2+ 5/2- | |||
729.23 3 | A FGHI L N | 3/2- | 613.73 14 ? 674.68 4 729.24 4 | 70 30 100 2 47.8 4 | 115.717 54.536 0.0 | 7/2+ 5/2- 3/2- | ||
741.72 5 | F L | 9/2+ | 226.5 4 561.40 5 626.19 7 | <62 100 5 96 5 | 514.671 180.229 115.717 | 7/2- 9/2+ 7/2+ | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
746.9 5 | J M OP | (3/2-) | 221 231 273 693 748 | 8 3 14 3 8 3 100 10 | 524.847 514.671 474.630 54.536 0.0 | 5/2+ 7/2- 3/2+ 5/2- 3/2- | ||
751.436 12 | A FGHI L NO | 3/2+ | 226.63 3 276.86 5 635.75 9 687.502 13 696.94 4 750.8 6 ? | 3.2 6 3.5 7 3.9 8 100 10 6.1 6 ≤12 | 524.847 474.630 115.717 63.916 54.536 0.0 | 5/2+ 3/2+ 7/2+ 5/2+ 5/2- 3/2- | ||
762.670 17 | A EFGHI L O | 3/2- | 238.49 19 288.023 19 328.3 2 762.69 3 | 5.4 12 18.6 15 4.0 15 100 5 | 524.847 474.630 434.426 0.0 | 5/2+ 3/2+ 5/2- 3/2- | ||
771.302 17 | A EFG L O | (7/2+) | 163.7 2 246.5 2 543.93 6 591.097 19 655.592 28 707.46 9 716.92 10 | 4.2 24 4.2 24 ≤21 85 8 100 10 25 4 15 4 | 607.589 524.847 226.983 180.229 115.717 63.916 54.536 | 7/2(+) 5/2+ 9/2- 9/2+ 7/2+ 5/2+ 5/2- | ||
788.54 3 | EFG LM | 5/2- | 657.07 4 734.05 4 788.46 6 | 54 3 100 5 36.0 20 | 131.451 54.536 0.0 | 7/2- 5/2- 3/2- | ||
793.67 4 | FGHI L NO | 1/2- | 358.92 15 ? 739.10 7 793.68 5 | 6.7 19 10 4 100 6 | 434.426 54.536 0.0 | 5/2- 5/2- 3/2- | ||
794 3 | E J | (5/2-) | ||||||
801.32 9 | L P | 17/2- | 2.6 ps 2 | 161.0 1 189.1 292.4 322.7 1 | 19 8 1.2 5 7.8 17 100 8 | E1 E1 [E2] | 640.33 612.1 508.93 478.62 | 15/2- 17/2+ 15/2+ 13/2- |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
806.67 12 | L | 11/2+ | 534.45 11 | 100 | 272.22 | 11/2+ | ||
809.13 3 | EFGHIJ LMNO | 3/2- | 284.26 20 334.36 20 754.59 3 809.25 10 | 6.8 15 12.3 18 100 5 16 5 | 524.847 474.630 54.536 0.0 | 5/2+ 3/2+ 5/2- 3/2- | ||
814.11 4 | A FG L OP | (5/2-) | 339.19 12 682.60 6 698.51 9 750.24 10 759.75 15 814.22 10 | 22.2 12 58 17 45.5 24 100 5 15.6 12 47 3 | 474.630 131.451 115.717 63.916 54.536 0.0 | 3/2+ 7/2- 7/2+ 5/2+ 5/2- 3/2- | ||
816.50 5 | F I L | (5/2+) | 685.14 10 700.56 19 752.55 8 816.50 9 | 40.7 18 43 3 100 5 48 3 | 131.451 115.717 63.916 0.0 | 7/2- 7/2+ 5/2+ 3/2- | ||
816.574 15 | A | (5/2,7/2-) | 129.5 2 209.0 2 291.69 7 342.0 685.2 2 700.856 16 752.61 4 762.7 6 ? 816.64 4 | 4.1 22 6 3 7.4 19 16 8 100 10 87 9 ≈11 24 4 | 686.667 607.589 524.847 474.630 131.451 115.717 63.916 54.536 0.0 | 5/2+,7/2+ 7/2(+) 5/2+ 3/2+ 7/2- 7/2+ 5/2+ 5/2- 3/2- | ||
827 1 | F | |||||||
831.9 5 | P | 19/2+ | 219.9 323.1 | | 612.1 508.93 | 17/2+ 15/2+ | ||
840 4 | E J M O | (5/2-) | ||||||
840.42 8 | F L | 7/2- | 613.10 15 785.90 9 840.9 2 | 19.7 21 61 3 100 13 | 226.983 54.536 0.0 | 9/2- 5/2- 3/2- | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
849.3 2 | NO | 11/2+,13/2+ | 488.23 14 | 100 | 361.04 | 13/2+ | ||
875 2 | F | |||||||
887.93 6 | LM | 5/2- | 833.19 13 887.97 6 | 100 18 91 5 | 54.536 0.0 | 5/2- 3/2- | ||
902 3 | E J O | (7/2-) | ||||||
916 | M O | |||||||
919.31 4 | A EF L N | (7/2+,9/2-) | 647.65 20 739.34 12 803.35 5 865.28 9 | 11 2 89 28 80 6 100 6 | 272.22 180.229 115.717 54.536 | 11/2+ 9/2+ 7/2+ 5/2- | ||
937.2 6 | G | 1/2+,3/2+ | ||||||
939.3 7 | P | 21/2+ | 107.3 327.2 | | 831.9 612.1 | 19/2+ 17/2+ | ||
952 1 | F | |||||||
964 3 | E J M O | (9/2-) | ||||||
972 2 | FG I | |||||||
981 5 | J O | (9/2-) | ||||||
996.6 9 | IJ | |||||||
1002.53 12 | P | 19/2- | 1.81 ps 16 | 171.3 201 1 362.2 1 390.5 | 0.9 3 19 14 100 14 25 4 | E1 [E2] [E1] | 831.9 801.32 640.33 612.1 | 19/2+ 17/2- 15/2- 17/2+ |
1015 2 | M | |||||||
1041.50 20 | FGHIJ L | 1/2,3/2- | 1041.5 2 | 100 | 0.0 | 3/2- | ||
1044 7 | E | 3/2- | ||||||
1049.68 4 | A FG L | 615.2 3 934.24 8 985.69 4 | 42.3 24 48.8 24 100 5 | 434.426 115.717 63.916 | 5/2- 7/2+ 5/2+ | |||
1059.67 7 | F L | 3/2,5/2 | 584.92 12 625.31 25 996.13 14 1059.53 11 | 92 11 30 8 120 20 100 10 | 474.630 434.426 63.916 0.0 | 3/2+ 5/2- 5/2+ 3/2- | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
≈1060 | O | (11/2-) | ||||||
1060.07 6 | A | 3/2+,5/2 | 585.46 20 625.6 2 944.21 10 996.38 12 1060.06 10 | 55 17 45 14 100 31 93 28 86 28 | 474.630 434.426 115.717 63.916 0.0 | 3/2+ 5/2- 7/2+ 5/2+ 3/2- | ||
1062.5 6 | F I | |||||||
1093.04 6 | FGHI M O | 1/2+,3/2+ | ||||||
1108.3 11 | E G J M O | |||||||
1136.7 3 | I M | |||||||
1142.0 8 | IJ O | 5/2+ | ||||||
1157.0 9 | FG I | 5/2+ | ||||||
1166.8 11 | G | |||||||
1184.5 5 | E IJ O | |||||||
1185.62 13 | P | 21/2- | 1.15 ps 17 | 183.3 353.6 384.3 1 | | 1002.53 831.9 801.32 | 19/2- 19/2+ 17/2- | |
1204 5 | E J O | |||||||
1231.50 10 | A F LM | 5/2+,7/2,9/2+ | 1051.57 15 1115.53 15 ? 1167.38 12 | 55 17 40 12 100 24 | 180.229 115.717 63.916 | 9/2+ 7/2+ 5/2+ | ||
1238.1 11 | G | 1/2+,3/2+ | ||||||
1241.1 9 | P | 23/2+ | 409.2 | 100 | 831.9 | 19/2+ | ||
1247.20 7 | FG I L O | 1/2+,3/2+ | 560.1 8 ? 722.55 10 ? 772.62 8 1247.10 10 | 100 4 76 7 57 4 55 4 | 686.667 524.847 474.630 0.0 | 5/2+,7/2+ 5/2+ 3/2+ 3/2- | ||
1249.6 4 | HI | 1/2+,3/2+ | ||||||
1282.7 9 | EF HIJ M | 1/2+,3/2+ | ||||||
1285.8 11 | G J | 1/2,3/2 | ||||||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1298.25 17 | GHIJ | 1/2+,3/2+ | ||||||
1305 5 | O | |||||||
1316.39 6 | EFGHIJ M O | 1/2-,3/2- | 1316.38 6 | 100 | 0.0 | 3/2- | ||
1332.7 20 | GHIJ M | 1/2+,3/2+ | ||||||
1339.10 24 | HI O | 1/2+,3/2+ | ||||||
1344.8 13 | P | 25/2+ | 405.5 | 100 | 939.3 | 21/2+ | ||
1349.13 6 | FGHIJ M O | 1/2- | 1285.20 6 1349.18 13 | 100 4 53 5 | 63.916 0.0 | 5/2+ 3/2- | ||
1377.4 22 | E I M | |||||||
1387.06 5 | EFGHI M | 1/2-,3/2- | 1387.05 5 | 100 | 0.0 | 3/2- | ||
1393 5 | E J O | (7/2-) | ||||||
1399.3 5 | E I M | |||||||
1412.71 17 | GHI O | 1/2-,3/2- | ||||||
1423.9 8 | P | 23/2- | 0.60 ps 5 | 421.4 484.5 | | 1002.53 939.3 | 19/2- 21/2+ | |
1437.2 6 | IJ M | |||||||
1446.5 9 | I | 5/2+ | ||||||
1455 2 | M | |||||||
1467.4 13 | E IJ O | 5/2 | ||||||
1477.90 23 | E GHIJ M | |||||||
1486.8 5 | F J M | 1/2,3/2 | ||||||
1490.07 5 | FGHIJ | 3/2+ | 1435.59 9 1490.03 6 | 38.9 23 100 3 | 54.536 0.0 | 5/2- 3/2- | ||
1510 2 | M | |||||||
1521.36 17 | EFGHIJ O | 3/2- | 1457.44 17 | 100 | 63.916 | 5/2+ | ||
1526.12 6 | FGHI O | 1/2,3/2 | 1526.11 6 | 100 | 0.0 | 3/2- | ||
1536.6 15 | G | 1/2+,3/2+ | ||||||
1540.0 5 | F | 1/2+,3/2+ | ||||||
1552.0 5 | HIJ O | 1/2+,3/2+ | ||||||
1552.2 2 | N | 5/2+ | 1420.97 18 1497.30 30 1552.35 22 | 95 19 100 20 88 17 | 131.451 54.536 0.0 | 7/2- 5/2- 3/2- | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1556.3 5 | IJ O | |||||||
1562.7 5 | HI O | 1/2+,3/2+ | ||||||
1563.1 6 | N | (3/2-,5/2,7/2-) | 1431.8 4 1507.7 8 1563.6 6 | 58 21 64 25 100 32 | 131.451 54.536 0.0 | 7/2- 5/2- 3/2- | ||
1564.7 17 | HI O | 1/2,3/2+ | ||||||
1568.48 20 | FGHI O | |||||||
1574.1 4 | E I O | |||||||
1583.7 4 | E HI O | (1/2+,3/2+) | ||||||
1589.68 12 | EFGHIJ O | 1/2,3/2 | 1589.67 12 | 100 | 0.0 | 3/2- | ||
1589.8 2 | N | 3/2+,5/2+ | 1064.74 20 1115.55 16 1154.87 22 | 33 6 100 12 46 7 | 524.847 474.630 434.426 | 5/2+ 3/2+ 5/2- | ||
1606.8 6 | E I O | |||||||
1611.88 18 | HIJ O | 1/2-,3/2- | ||||||
1614.13 8 | FG J O | (3/2-) | 1482.56 20 1498.55 10 1613.83 16 | 59 9 81 5 100 12 | 131.451 115.717 0.0 | 7/2- 7/2+ 3/2- | ||
1616.68 20 | HIJ O | 1/2-,3/2- | ||||||
1623.1 9 | P | 25/2- | 381.9 437.5 | | 1241.1 1185.62 | 23/2+ 21/2- | ||
1635.8 4 | GHI O | (1/2,3/2)+ | ||||||
1649.0 6 | I | |||||||
1658.76 10 | FGHIJ | 1/2-,3/2- | 1604.20 10 1658.9 3 | 100 6 91 16 | 54.536 0.0 | 5/2- 3/2- | ||
1667.58 11 | FGHI O | (1/2,3/2)- | 1667.57 11 | 100 | 0.0 | 3/2- | ||
1678.9 7 | HI | (1/2,3/2)+ | ||||||
1692.2 4 | GHI | |||||||
1701.7 5 | HI | |||||||
1707.0 15 | G | (1/2,3/2)+ | ||||||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1717.66 15 | FGHI O | (1/2,3/2)- | ||||||
1720.70 16 | HI O | (1/2,3/2) | ||||||
1732.5 14 | P | 27/2+ | 491.4 | 100 | 1241.1 | 23/2+ | ||
1735.6 2 | N | 5/2+ | 984.23 22 1221.20 30 1301.13 13 | 29 7 31 7 100 12 | 751.436 514.671 434.426 | 3/2+ 7/2- 5/2- | ||
1736.4 3 | HI O | 1/2-,3/2- | ||||||
1739.7 9 | FGHIJ O | 1/2-,3/2- | ||||||
1750.14 15 | FGHIJ | 1/2-,3/2- | ||||||
1760.09 23 | HIJ | 1/2+,3/2+ | ||||||
1766.6 15 | H J | 1/2+,3/2+ | ||||||
1788.2 5 | HIJ | 1/2+,3/2+ | ||||||
1798.6 7 | EFG IJ | (3/2-) | ||||||
1802.0 3 | HIJ | |||||||
1810 | J O | |||||||
1824.10 9 | FGHI | 1/2-,3/2- | 1769.55 9 | 100 | 54.536 | 5/2- | ||
1825 5 | O | 7/2+ | ||||||
1825.6 1 | N | 5/2+ | 1310.89 15 1350.86 21 1391.24 6 1709.8 4 | 37 4 9.4 19 100 6 9 2 | 514.671 474.630 434.426 115.717 | 7/2- 3/2+ 5/2- 7/2+ | ||
1827.3 16 | P | 29/2+ | 482.5 | 100 | 1344.8 | 25/2+ | ||
1836.2 3 | E HIJ O | 1/2-,3/2- | ||||||
1844.91 6 | EFGHIJ O | 1330.22 6 1665.6 6 | 100 3 13 5 | 514.671 180.229 | 7/2- 9/2+ | |||
1850.7 4 | HIJ | 1/2+,3/2+ | ||||||
1856.6 10 | FGHI | 1/2+,3/2+ | ||||||
1861.72 18 | HI | 1/2-,3/2- | ||||||
1864.1 15 | G J | 1/2,3/2 | ||||||
1867.94 16 | F IJ | 1804.1 3 1867.90 18 | 61 10 100 11 | 63.916 0.0 | 5/2+ 3/2- | |||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1889.26 18 | F HI | 1/2-,3/2- | ||||||
1896.36 25 | E HI | 1/2+,3/2+ | ||||||
1896.4 13 | P | 27/2- | 472.5 | 100 | 1423.9 | 23/2- | ||
1902 15 | O | 11/2- | ||||||
1905.9 4 | N | (11/2-) | 1326.6 2 1478.8 3 1543.6 5 1632.8 4 1679.8 5 1724.9 4 | 100 15 15.5 57 34 9 13 5 56 12 25 7 | 579.40 426.539 361.04 272.22 226.983 180.229 | (13/2-) 11/2- 13/2+ 11/2+ 9/2- 9/2+ | ||
1906.1 4 | H J | |||||||
1915.88 14 | HI | 1/2-,3/2- | ||||||
1920.91 25 | F HI | 1/2,3/2 | ||||||
1927.47 8 | F J | 3/2+,5/2,7/2- | 1811.8 4 1927.45 8 | 49 21 100 3 | 115.717 0.0 | 7/2+ 3/2- | ||
1937.18 20 | F HIJ | 1/2-,3/2- | ||||||
1953.0 5 | EF HI O | 1/2+,3/2+ | ||||||
1956.0 10 | EF HI K O | 1/2-,3/2- | 1956 | 100 | 0.0 | 3/2- | ||
1959.3 9 | E I O | |||||||
1963.3 8 | H O | |||||||
1973.7 4 | F | 1/2,3/2 | ||||||
1976.0 10 | HI K | 1/2,3/2 | 1976 | | 0.0 | 3/2- | ||
1984.0 5 | F HI | 1/2-,3/2- | ||||||
1992.01 23 | F HI | 1/2-,3/2- | ||||||
1997.3 5 | EF HI | 1/2+,3/2+ | ||||||
2015.8 7 | H | |||||||
2028.6 6 ? | I | |||||||
2038.04 25 | F HI | 1/2-,3/2- | ||||||
2044.4 5 | F H | |||||||
2052.2 3 | F HI | |||||||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
2073.0 10 | HI K | (1/2,3/2) | 2073 | 100 | 0.0 | 3/2- | ||
2094.2 3 | HI | 1/2+,3/2+ | ||||||
2099.3 3 | HI | |||||||
2108.7 13 | P | 29/2+ | 485.6 | 100 | 1623.1 | 25/2- | ||
2118.1 4 | E HI | 1/2-,3/2- | ||||||
2123.3 7 | E HI | |||||||
2131.0 10 | HI K | 2131 | 100 | 0.0 | 3/2- | |||
2135.9 4 | HI | |||||||
2146.7 3 | HI | 1/2-,3/2- | ||||||
2164.81 16 | HI | 1/2-,3/2- | ||||||
2173.6 3 | HI | 1/2-,3/2- | ||||||
2180.0 10 | HI K | 2180 | 100 | 0.0 | 3/2- | |||
2181.2 3 | HI | |||||||
2188.56 20 | HI | 1/2-,3/2- | ||||||
2200.0 10 | HI K | 1/2-,3/2- | 2200 | 100 | 0.0 | 3/2- | ||
2207.75 21 | HI | 1/2-,3/2- | ||||||
2218.1 3 | HI | 1/2-,3/2- | ||||||
2230.3 3 | HI | 1/2-,3/2- | ||||||
2242.2 6 | HI | |||||||
2250.0 10 | HI K | 2250 | 100 | 0.0 | 3/2- | |||
2253.0 10 | K | 2253 | 100 | 0.0 | 3/2- | |||
2259.48 25 | HI | 1/2-,3/2- | ||||||
2276.2 8 | HI | |||||||
2290.0 10 | HI K | 1/2-,3/2- | 2290 | | 0.0 | 3/2- | ||
2303.4 7 | HI | |||||||
2306.0 10 | HI K | 2306 | | 0.0 | 3/2- | |||
2317.1 3 | HI | 1/2-,3/2- | ||||||
2328.1 4 | HI | |||||||
2335.0 10 | HI K | 1/2-,3/2- | 2335 | 100 | 0.0 | 3/2- | ||
2342.8 4 | HI | |||||||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
2346.0 10 | K | 2346 | 100 | 0.0 | 3/2- | |||
2352.6 4 | HI | |||||||
2367.3 3 | HI | 1/2-,3/2- | ||||||
2373.39 19 | HI | 1/2-,3/2- | ||||||
2380.8 4 | HI O | 1/2-,3/2- | ||||||
2387.1 5 | HI O | |||||||
2393.4 7 | HI O | |||||||
2397.0 10 | K | 2397 | 100 | 0.0 | 3/2- | |||
2402.0 10 | HI K O | 2402 | 100 | 0.0 | 3/2- | |||
2413.3 5 | HI | 1/2+,3/2+ | ||||||
2441.6 4 | HI | 1/2-,3/2- | ||||||
2446.0 10 | K | 2446 | 100 | 0.0 | 3/2- | |||
2465.7 7 | HI | |||||||
2469.3 6 | HI | 1/2-,3/2- | ||||||
2488.0 10 | K | 2488 | 100 | 0.0 | 3/2- | |||
2491.9 3 | HI | 1/2+,3/2+ | ||||||
2504.0 10 | K | 2504 | 100 | 0.0 | 3/2- | |||
2509.0 10 | K | 2509 | 100 | 0.0 | 3/2- | |||
2519.0 10 | HI K | 2519 | 100 | 0.0 | 3/2- | |||
2523.9 5 | HI | |||||||
2527.0 10 | K | 2527 | 100 | 0.0 | 3/2- | |||
2537.0 10 | K | 2537 | 100 | 0.0 | 3/2- | |||
2542.0 10 | HI K | 2542 | 100 | 0.0 | 3/2- | |||
2547.0 10 | K | 2547 | 100 | 0.0 | 3/2- | |||
2556.0 10 | HI K | 2556 | 100 | 0.0 | 3/2- | |||
2564.0 10 | HI K | 2564 | 100 | 0.0 | 3/2- | |||
2571.3 4 | HI | |||||||
2581.0 10 | K | 2581 | 100 | 0.0 | 3/2- | |||
2585.2 3 | HI | 1/2-,3/2- | ||||||
2592.0 10 | HI K | 1/2-,3/2- | 2592 | 100 | 0.0 | 3/2- | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
2594.0 10 | HI K | 2594 | 100 | 0.0 | 3/2- | |||
2607.8 3 | HI | 1/2-,3/2- | ||||||
2614.7 4 | HI | 1/2-,3/2- | ||||||
2626.0 5 | HI | |||||||
2633.0 10 | HI K | 1/2-,3/2- | 2633 | 100 | 0.0 | 3/2- | ||
2650.6 6 | HI | |||||||
2657.0 10 | K | 2657 | 100 | 0.0 | 3/2- | |||
2659.2 5 | HI | 1/2+,3/2+ | ||||||
2663.2 11 | HI | |||||||
2666.3 5 | HI | (1/2,3/2)+ | ||||||
2674.3 7 | K | 2620 2674 | 100 96 21 | 54.536 0.0 | 5/2- 3/2- | |||
2689.0 10 | K | 2689 | 100 | 0.0 | 3/2- | |||
2694.0 10 | K | 2694 | 100 | 0.0 | 3/2- | |||
2706.2 7 | K | 2575 2706 | 100 68 10 | 131.451 0.0 | 7/2- 3/2- | |||
2721.0 10 | K | 2721 | 100 | 0.0 | 3/2- | |||
2744.0 10 | K | 2744 | 100 | 0.0 | 3/2- | |||
2760.0 10 | K | 2760 | | 0.0 | 3/2- | |||
2778.4 7 | K | 2663 2778 | 100 86 19 | 115.717 0.0 | 7/2+ 3/2- | |||
2787.0 10 | K | 2787 | 100 | 0.0 | 3/2- | |||
2798.0 10 | K | 2798 | 100 | 0.0 | 3/2- | |||
2827.0 7 | K | 2763 2827 | 75 11 100 | 63.916 0.0 | 5/2+ 3/2- | |||
2841.0 10 | K | 2841 | 100 | 0.0 | 3/2- | |||
2846.0 10 | K | 2846 | 100 | 0.0 | 3/2- | |||
2858.0 10 | K | 2858 | 100 | 0.0 | 3/2- | |||
2863.0 10 | K | 2863 | 100 | 0.0 | 3/2- | |||
2883.0 10 | K | 2883 | 100 | 0.0 | 3/2- | |||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
2906.0 10 | K | 2906 | 100 | 0.0 | 3/2- | |||
2916.3 7 | K | 2785 2916 | 98 17 100 | 131.451 0.0 | 7/2- 3/2- | |||
2925.3 7 | K | 2871 2925 | 35 7 100 | 54.536 0.0 | 5/2- 3/2- | |||
3020.3 7 | K | 2966 3020 | 60 9 100 | 54.536 0.0 | 5/2- 3/2- | |||
3035.0 10 | K | 3035 | 100 | 0.0 | 3/2- | |||
3040.0 10 | K | 3040 | 100 | 0.0 | 3/2- | |||
3049.4 7 | K | 2934 3049 | 100 54 16 | 115.717 0.0 | 7/2+ 3/2- | |||
3057.0 10 | K | 3057 | 100 | 0.0 | 3/2- | |||
3078.3 7 | K | 2947 3078 | 79 18 100 | 131.451 0.0 | 7/2- 3/2- | |||
3084.3 7 | K | 3030 3084 | 100 81 11 | 54.536 0.0 | 5/2- 3/2- | |||
3088.0 10 | K | 3088 | 100 | 0.0 | 3/2- | |||
3100.0 10 | K | 3100 | 100 | 0.0 | 3/2- | |||
3106.0 10 | K | 3106 | 100 | 0.0 | 3/2- | |||
3131.0 10 | K | 3131 | 100 | 0.0 | 3/2- | |||
3154.0 10 | K | 3154 | 100 | 0.0 | 3/2- | |||
3158.0 7 | K | 3094 3158 | 100 53 10 | 63.916 0.0 | 5/2+ 3/2- | |||
3162.0 10 | K | 3162 | 100 | 0.0 | 3/2- | |||
3228.0 10 | K | 3228 | 100 | 0.0 | 3/2- | |||
3233.0 10 | K | 3233 | 100 | 0.0 | 3/2- | |||
3239.0 10 | K | 3239 | 100 | 0.0 | 3/2- | |||
3251.0 10 | K | 3251 | 100 | 0.0 | 3/2- | |||
3268.0 10 | K | 3268 | 100 | 0.0 | 3/2- | |||
3272.0 10 | K | 3272 | 100 | 0.0 | 3/2- | |||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
3288.0 10 | K | 3288 | 100 | 0.0 | 3/2- | |||
3333.0 10 | K | 3333 | 100 | 0.0 | 3/2- | |||
3346.0 10 | K | 3346 | 100 | 0.0 | 3/2- | |||
3356.0 10 | K | 3356 | 100 | 0.0 | 3/2- | |||
3375.0 10 | K | 3375 | 100 | 0.0 | 3/2- | |||
3413.0 10 | K | 3413 | 100 | 0.0 | 3/2- | |||
3456.0 10 | K | 3456 | 100 | 0.0 | 3/2- | |||
3472.0 10 | K | 3472 | 100 | 0.0 | 3/2- | |||
3479.0 10 | K | 3479 | 100 | 0.0 | 3/2- | |||
3506.0 10 | K | 3506 | 100 | 0.0 | 3/2- | |||
3528.0 10 | K | 3528 | 100 | 0.0 | 3/2- | |||
3663.0 10 | K | 3663 | 100 | 0.0 | 3/2- | |||
3680.0 10 | K | 3680 | 100 | 0.0 | 3/2- | |||
3684.0 10 | K | 3684 | 100 | 0.0 | 3/2- | |||
3713.0 10 | K | 3713 | 100 | 0.0 | 3/2- | |||
3717.0 10 | K | 3717 | 100 | 0.0 | 3/2- | |||
3734.0 10 | K | 3734 | 100 | 0.0 | 3/2- | |||
3739.0 10 | K | 3739 | 100 | 0.0 | 3/2- | |||
3775.0 10 | K | 3775 | 100 | 0.0 | 3/2- | |||
3821.3 7 | K | 3767 3821 | 100 96 38 | 54.536 0.0 | 5/2- 3/2- | |||
3842.1 10 | K | 3842 | 100 | 0.0 | 3/2- |
E(level): Values computed from least-squares fit to γ energies where there are populating or depopulating γ rays. Where there are no γ’s, values from reactions have been averaged. Reduced χ2=2.5 (critical χ2=1.3)
E(level): Above 800 many of the associations of levels from different reactions are not unique.
T1/2(level): From direct measurements in Coulomb excitation (1992Ku15), unless otherwise noted. Above 1800 keV additional, approximate values can be computed from 157Gd(γ,γ’) data.
E(γ): The data are primarily from the β- decay of 157Eu (1986GrZS), and secondarily from Coulomb excitation and from secondary γ’s from (n,γ).
E(γ): The unplaced γ’s are not repeated here, see 157Eu β- decay, (n,n’γ), and (n,γ). The primary γ’s from the 156Gd(n,γ) reaction with various energy neutrons are not given here; see those reactions.
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - 3/2[521] band; α=10.82, B=0.0068. | |||||||
0.0 | 3/2- | STABLE | |||||
54.536 6 | 5/2- | 130 ps 8 | 54.548 8 | 100 | M1+E2 | 0.0 | 3/2- |
131.451 9 | 7/2- | 100 ps 10 | 67.3 76.925 14 131.438 16 | 0.9 8 100 3 30 3 | E1 M1+E2 E2 | 63.916 54.536 0.0 | 5/2+ 5/2- 3/2- |
226.983 19 | 9/2- | 16.7 ps 15 | 95.7 2 112.8 172.37 2 | 100 4 5.7 20 72 13 | E1 [E2] | 131.451 115.717 54.536 | 7/2- 7/2+ 5/2- |
347.05 6 | 11/2- | 12.2 ps 10 | 120.1 1 166.8 215.6 1 | 75.9 18 9 3 100.0 18 | E1 [E2] | 226.983 180.229 131.451 | 9/2- 9/2+ 7/2- |
478.62 4 | 13/2- | 7.3 ps 6 | 116.6 131.6 1 206.4 251.63 3 | 0.6 3 40 4 9 3 100 4 | E1 E1 [E2] | 361.04 347.05 272.22 226.983 | 13/2+ 11/2- 11/2+ 9/2- |
640.33 8 | 15/2- | 4.3 ps 3 | 131.3 161.7 1 279.4 293.3 1 | 0.45 15 36 6 14 3 100 6 | E1 E1 [E2] | 508.93 478.62 361.04 347.05 | 15/2+ 13/2- 13/2+ 11/2- |
801.32 9 | 17/2- | 2.6 ps 2 | 161.0 1 189.1 292.4 322.7 1 | 19 8 1.2 5 7.8 17 100 8 | E1 E1 [E2] | 640.33 612.1 508.93 478.62 | 15/2- 17/2+ 15/2+ 13/2- |
1002.53 12 | 19/2- | 1.81 ps 16 | |||||
1185.62 13 | 21/2- | 1.15 ps 17 | 183.3 353.6 384.3 1 | | 1002.53 831.9 801.32 | 19/2- 19/2+ 17/2- | |
1423.9 8 | 23/2- | 0.60 ps 5 | 421.4 484.5 | | 1002.53 939.3 | 19/2- 21/2+ | |
1623.1 9 | 25/2- | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 2 - 5/2[642] band; α=7.76, B=-0.0145. | |||||||
63.916 5 | 5/2+ | 0.46 µs 4 | |||||
115.717 7 | 7/2+ | 51.834 14 | 100 | M1+E2 | 63.916 | 5/2+ | |
180.229 11 | 9/2+ | 64.4 2 116.314 28 | 100 50 30 8 | (M1+E2) | 115.717 63.916 | 7/2+ 5/2+ | |
272.22 3 | 11/2+ | 91.96 8 156.50 4 | 100 5 58 3 | 180.229 115.717 | 9/2+ 7/2+ | ||
361.04 9 | 13/2+ | 88.8 180.84 10 | 100 | 272.22 180.229 | 11/2+ 9/2+ | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 3 - 11/2[505] bandhead | |||||||
426.539 23 | 11/2- | 18.5 µs 23 % IT = 100 | |||||
579.40 8 | (13/2-) | 152.86 7 | 100 | 426.539 | 11/2- | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 4 - 5/2[523] band; α=11.46. | |||||||
434.426 6 | 5/2- | < 0.1 ns | |||||
514.671 8 | 7/2- | 334.441 10 383.17 3 398.953 9 450.761 10 517 | 62 4 5.3 8 100 5 92 6 | 180.229 131.451 115.717 63.916 0.0 | 9/2+ 7/2- 7/2+ 5/2+ 3/2- | ||
617.38 3 | 9/2- | 345.16 6 437.06 6 501.70 4 | 48 3 42.9 22 100 7 | 272.22 180.229 115.717 | 11/2+ 9/2+ 7/2+ | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 5 - 3/2[402] band; α=10.04. | |||||||
474.630 6 | 3/2+ | < 0.1 ns | |||||
524.847 7 | 5/2+ | 344.61 6 393.408 20 409.135 10 460.923 9 470.389 26 524.835 18 | 1.3 3 4.6 5 100 5 36.2 25 7.4 7 11.3 11 | 180.229 131.451 115.717 63.916 54.536 0.0 | 9/2+ 7/2- 7/2+ 5/2+ 5/2- 3/2- | ||
607.589 15 | 7/2(+) | 380.38 6 427.355 15 491.89 3 543.93 6 553.02 7 | 20 3 100 10 57 8 7.5 8 17.3 10 | 226.983 180.229 115.717 63.916 54.536 | 9/2- 9/2+ 7/2+ 5/2+ 5/2- | ||
664.44 5 | 9/2+ | 392.19 4 533.18 14 548.83 12 | 100 5 16 10 13.0 15 | 272.22 131.451 115.717 | 11/2+ 7/2- 7/2+ | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 6 - 1/2[400] bandhead | |||||||
682.82 4 | 1/2+ | ||||||
751.436 12 | 3/2+ | 226.63 3 276.86 5 635.75 9 687.502 13 696.94 4 750.8 6 ? | 3.2 6 3.5 7 3.9 8 100 10 6.1 6 ≤12 | 524.847 474.630 115.717 63.916 54.536 0.0 | 5/2+ 3/2+ 7/2+ 5/2+ 5/2- 3/2- | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 7 - 1/2[521] band | |||||||
701.39 4 | (1/2)- | ||||||
746.9 5 | (3/2-) | 221 231 273 693 748 | 8 3 14 3 8 3 100 10 | 524.847 514.671 474.630 54.536 0.0 | 5/2+ 7/2- 3/2+ 5/2- 3/2- | ||
840.42 8 | 7/2- | 613.10 15 785.90 9 840.9 2 | 19.7 21 61 3 100 13 | 226.983 54.536 0.0 | 9/2- 5/2- 3/2- | ||
981 5 | (9/2-) | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 8 - 1/2[530] band; α=5.6, a=-0.10. | |||||||
793.67 4 | 1/2- | ||||||
809.13 3 | 3/2- | 284.26 20 334.36 20 754.59 3 809.25 10 | 6.8 15 12.3 18 100 5 16 5 | 524.847 474.630 54.536 0.0 | 5/2+ 3/2+ 5/2- 3/2- | ||
887.93 6 | 5/2- | 833.19 13 887.97 6 | 100 18 91 5 | 54.536 0.0 | 5/2- 3/2- | ||
964 3 | (9/2-) | ||||||
≈1060 | (11/2-) | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 9 - 3/2[532] bandhead | |||||||
762.670 17 | 3/2- | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 10 - 5/2[512] expected bandhead (only first (7/2-) level known) | |||||||
1393 5 | (7/2-) | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 11 - 7/2[404] bandhead | |||||||
1825 5 | 7/2+ | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 12 - 3/2[651] band | |||||||
683.236 9 | 3/2+ | < 0.3 ns | |||||
741.72 5 | 9/2+ | 226.5 4 561.40 5 626.19 7 | <62 100 5 96 5 | 514.671 180.229 115.717 | 7/2- 9/2+ 7/2+ | ||
771.302 17 | (7/2+) | 163.7 2 246.5 2 543.93 6 591.097 19 655.592 28 707.46 9 716.92 10 | 4.2 24 4.2 24 ≤21 85 8 100 10 25 4 15 4 | 607.589 524.847 226.983 180.229 115.717 63.916 54.536 | 7/2(+) 5/2+ 9/2- 9/2+ 7/2+ 5/2+ 5/2- | ||
806.67 12 | 11/2+ | 534.45 11 | 100 | 272.22 | 11/2+ |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
54.536 | 5/2- | 130 ps 8 | 54.548 8 | M1+E2 | 0.19 4 | 12.1 | B(E2)(W.u.)=4.8×102 20, B(M1)(W.u.)=0.077 6, α=12.1 3, α(K)=9.50 17, α(L)=2.0 3, α(M)=0.45 7, α(N)=0.102 14, α(O)=0.0150 18, α(P)=0.000718 13 |
63.916 | 5/2+ | 0.46 µs 4 | 9.365 12 | E1 | 30.8 | B(E1)(W.u.)=1.04E-5 21, α=30.8 | |
5/2+ | 0.46 µs 4 | 63.929 8 | E1 | 0.961 | B(E1)(W.u.)=4.6E-7 8, α=0.961, α(K)=0.795 12, α(L)=0.1301 19, α(M)=0.0283 4, α(N)=0.00634 9, α(O)=0.000904 13, α(P)=4.18E-5 6 | ||
115.717 | 7/2+ | 51.834 14 | M1+E2 | 0.20 | 14.06 | α=14.06, α(K)=10.86 16, α(L)=2.50 4, α(M)=0.560 8, α(N)=0.1272 18, α(O)=0.0184 3, α(P)=0.000831 12 | |
131.451 | 7/2- | 100 ps 10 | 67.3 | E1 | 0.840 | B(E1)(W.u.)=1.2E-5 11, α=0.840, α(K)=0.697 10, α(L)=0.1126 16, α(M)=0.0244 4, α(N)=0.00549 8, α(O)=0.000786 11, α(P)=3.68E-5 6 | |
7/2- | 100 ps 10 | 76.925 14 | M1+E2 | 0.18 | 4.36 | B(E2)(W.u.)=220 25, B(M1)(W.u.)=0.079 9, α=4.36, α(K)=3.57 5, α(L)=0.619 9, α(M)=0.1366 20, α(N)=0.0312 5, α(O)=0.00469 7, α(P)=0.000265 4 | |
7/2- | 100 ps 10 | 131.438 16 | E2 | 0.940 | B(E2)(W.u.)=144 21, α=0.940, α(K)=0.543 8, α(L)=0.307 5, α(M)=0.0719 10, α(N)=0.01609 23, α(O)=0.00214 3, α(P)=2.82E-5 4 | ||
180.229 | 9/2+ | 64.4 2 | (M1+E2) | 10.4 | α=10.4 32, α(K)=4.5 16, α(L)=4.5 37, α(M)=1.07 88, α(N)=0.24 20, α(O)=0.031 25, α(P)=3.0×10-4 15 | ||
226.983 | 9/2- | 16.7 ps 15 | 112.8 | E1 | 0.211 | B(E1)(W.u.)=0.00027 10, α=0.211, α(K)=0.1775 25, α(L)=0.0264 4, α(M)=0.00572 8, α(N)=0.001294 19, α(O)=0.000190 3, α(P)=1.009E-5 15 | |
9/2- | 16.7 ps 15 | 172.37 2 | [E2] | 0.367 | B(E2)(W.u.)=1.6×103 4, α=0.367, α(K)=0.242 4, α(L)=0.0962 14, α(M)=0.0223 4, α(N)=0.00501 7, α(O)=0.000680 10, α(P)=1.345E-5 19 | ||
347.05 | 11/2- | 12.2 ps 10 | 166.8 | E1 | 0.0736 | B(E1)(W.u.)=0.00018 7, α=0.0736, α(K)=0.0622 9, α(L)=0.00893 13, α(M)=0.00193 3, α(N)=0.000439 7, α(O)=6.56E-5 10, α(P)=3.73E-6 6 | |
11/2- | 12.2 ps 10 | 215.6 1 | [E2] | 0.1731 | B(E2)(W.u.)=9.8×102 9, α=0.1731, α(K)=0.1232 18, α(L)=0.0387 6, α(M)=0.00889 13, α(N)=0.00200 3, α(O)=0.000276 4, α(P)=7.20E-6 11 | ||
426.539 | 11/2- | 18.5 µs 23 % IT = 100 | 199 | [M1,E2] | 0.26 | B(E2)(W.u.)<0.0007, B(M1)(W.u.)<5.4E-8, α=0.26 4, α(K)=0.20 5, α(L)=0.044 10, α(M)=0.0100 24, α(N)=0.0023 5, α(O)=0.00033 6, α(P)=1.36E-5 47 | |
11/2- | 18.5 µs 23 % IT = 100 | 246.31 2 | [E1] | 0.0263 | B(E1)(W.u.)=5.1E-10 8, α=0.0263, α(K)=0.0223 4, α(L)=0.00313 5, α(M)=0.000676 10, α(N)=0.0001541 22, α(O)=2.33E-5 4, α(P)=1.397E-6 20 | ||
434.426 | 5/2- | < 0.1 ns | 302.994 28 | [M1,E2] | 0.076 | α=0.076 18, α(K)=0.062 17, α(L)=0.0109 3, α(M)=0.00241 4, α(N)=0.000551 10, α(O)=8.2×10-5 5, α(P)=4.3E-6 16 | |
5/2- | < 0.1 ns | 318.710 8 | E1 | 0.01370 | B(E1)(W.u.)>1.4E-5, α=0.01370, α(K)=0.01165 17, α(L)=0.001608 23, α(M)=0.000347 5, α(N)=7.93E-5 12, α(O)=1.207E-5 17, α(P)=7.45E-7 11 | ||
5/2- | < 0.1 ns | 370.509 8 | E1 | 0.00947 | B(E1)(W.u.)>3.4E-5, α=0.00947, α(K)=0.00807 12, α(L)=0.001105 16, α(M)=0.000238 4, α(N)=5.45E-5 8, α(O)=8.32E-6 12, α(P)=5.22E-7 8 | ||
5/2- | < 0.1 ns | 379.905 9 | [M1,E2] | 0.041 | α=0.041 11, α(K)=0.034 10, α(L)=0.0055 7, α(M)=0.00121 12, α(N)=0.00028 3, α(O)=4.2×10-5 6, α(P)=2.37E-6 84 | ||
5/2- | < 0.1 ns | 434.388 13 | [M1,E2] | 0.0283 | α=0.0283 80, α(K)=0.0236 73, α(L)=0.0037 6, α(M)=0.00082 12, α(N)=0.00019 3, α(O)=2.8×10-5 5, α(P)=1.67E-6 59 | ||
474.630 | 3/2+ | < 0.1 ns | 358.931 15 | [E2] | 0.0351 | B(E2)(W.u.)>0.26, α=0.0351, α(K)=0.0276 4, α(L)=0.00588 9, α(M)=0.001321 19, α(N)=0.000300 5, α(O)=4.32E-5 6, α(P)=1.777E-6 25 | |
3/2+ | < 0.1 ns | 410.723 9 | M1+E2 | 1.0 LE | 0.037 | B(M1)(W.u.)>0.0013, α=0.037 5, α(K)=0.031 5, α(L)=0.0047 4, α(M)=0.00102 7, α(N)=0.000234 15, α(O)=3.6×10-5 3, α(P)=2.3E-6 4 | |
3/2+ | < 0.1 ns | 420.090 9 | [E1] | 0.00703 | B(E1)(W.u.)>1.3E-6, α=0.00703, α(K)=0.00599 9, α(L)=0.000815 12, α(M)=0.0001758 25, α(N)=4.02E-5 6, α(O)=6.16E-6 9, α(P)=3.91E-7 6 | ||
3/2+ | < 0.1 ns | 474.625 11 | [E1] | 0.00530 | B(E1)(W.u.)>2.5E-6, α=0.00530, α(K)=0.00452 7, α(L)=0.000612 9, α(M)=0.0001318 19, α(N)=3.02E-5 5, α(O)=4.63E-6 7, α(P)=2.97E-7 5 | ||
478.62 | 13/2- | 7.3 ps 6 | 116.6 | E1 | 0.193 | B(E1)(W.u.)=8.E-5 4, α=0.193, α(K)=0.1624 23, α(L)=0.0241 4, α(M)=0.00521 8, α(N)=0.001180 17, α(O)=0.0001740 25, α(P)=9.28E-6 13 | |
13/2- | 7.3 ps 6 | 206.4 | E1 | 0.0418 | B(E1)(W.u.)=0.00020 7, α=0.0418, α(K)=0.0354 5, α(L)=0.00501 7, α(M)=0.001082 16, α(N)=0.000247 4, α(O)=3.71E-5 6, α(P)=2.17E-6 3 | ||
13/2- | 7.3 ps 6 | 251.63 3 | [E2] | 0.1047 | B(E2)(W.u.)=9.5×102 10, α=0.1047, α(K)=0.0774 11, α(L)=0.0212 3, α(M)=0.00484 7, α(N)=0.001092 16, α(O)=0.0001528 22, α(P)=4.68E-6 7 | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
640.33 | 15/2- | 4.3 ps 3 | 131.3 | E1 | 0.1401 | B(E1)(W.u.)=6.8E-5 24, α=0.1401, α(K)=0.1181 17, α(L)=0.01729 25, α(M)=0.00374 6, α(N)=0.000849 12, α(O)=0.0001257 18, α(P)=6.86E-6 10 | |
15/2- | 4.3 ps 3 | 279.4 | E1 | 0.0191 | B(E1)(W.u.)=0.00022 6, α=0.0191, α(K)=0.01619 23, α(L)=0.00225 4, α(M)=0.000486 7, α(N)=0.0001110 16, α(O)=1.684E-5 24, α(P)=1.025E-6 15 | ||
15/2- | 4.3 ps 3 | 293.3 1 | [E2] | 0.0646 | B(E2)(W.u.)=7.7×102 9, α=0.0646, α(K)=0.0492 7, α(L)=0.01198 17, α(M)=0.00272 4, α(N)=0.000614 9, α(O)=8.71E-5 13, α(P)=3.06E-6 5 | ||
683.236 | 3/2+ | < 0.3 ns | 567.58 4 | [E2] | 0.01007 | B(E2)(W.u.)>0.022, α=0.01007, α(K)=0.00827 12, α(L)=0.001406 20, α(M)=0.000311 5, α(N)=7.09E-5 10, α(O)=1.056E-5 15, α(P)=5.60E-7 8 | |
3/2+ | < 0.3 ns | 683.162 27 | [E1] | 0.00641 | B(E1)(W.u.)>1.3E-7, α=0.00641, α(K)=0.00532 8, α(L)=0.000849 12, α(M)=0.000186 3, α(N)=4.26E-5 6, α(O)=6.42E-6 9, α(P)=3.65E-7 6 | ||
801.32 | 17/2- | 2.6 ps 2 | 189.1 | E1 | 0.0527 | B(E1)(W.u.)=0.00012 6, α=0.0527, α(K)=0.0446 7, α(L)=0.00634 9, α(M)=0.001371 20, α(N)=0.000312 5, α(O)=4.68E-5 7, α(P)=2.71E-6 4 | |
17/2- | 2.6 ps 2 | 292.4 | E1 | 0.01699 | B(E1)(W.u.)=0.00021 6, α=0.01699, α(K)=0.01444 21, α(L)=0.00200 3, α(M)=0.000432 6, α(N)=9.88E-5 14, α(O)=1.499E-5 21, α(P)=9.17E-7 13 | ||
17/2- | 2.6 ps 2 | 322.7 1 | [E2] | 0.0482 | B(E2)(W.u.)=9.3×102 14, α=0.0482, α(K)=0.0373 6, α(L)=0.00850 12, α(M)=0.00192 3, α(N)=0.000435 7, α(O)=6.21E-5 9, α(P)=2.36E-6 4 | ||
1002.53 | 19/2- | 1.81 ps 16 | 171.3 | E1 | 0.0685 | B(E1)(W.u.)=0.00015 6, α=0.0685, α(K)=0.0580 9, α(L)=0.00830 12, α(M)=0.00180 3, α(N)=0.000408 6, α(O)=6.11E-5 9, α(P)=3.48E-6 5 | |
19/2- | 1.81 ps 16 | 362.2 1 | [E2] | 0.0342 | B(E2)(W.u.)=6.7×102 15, α=0.0342, α(K)=0.0269 4, α(L)=0.00570 8, α(M)=0.001281 18, α(N)=0.000290 4, α(O)=4.19E-5 6, α(P)=1.735E-6 25 | ||
19/2- | 1.81 ps 16 | 390.5 | [E1] | 0.00835 | B(E1)(W.u.)=0.00036 9, α=0.00835, α(K)=0.00712 10, α(L)=0.000972 14, α(M)=0.000210 3, α(N)=4.80E-5 7, α(O)=7.33E-6 11, α(P)=4.62E-7 7 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 3/2- | STABLE | Q=+1.36 2, μ=-0.3398 7 δ<r2>(156,157)=0.031 fm2 4 (1987GaZN). E(level): δ<r2>(156,157)=0.031 fm2 4 (1987GaZN). 3/2[521] band; α=10.82, B=0.0068. |
54.536 | 5/2- | 130 ps 8 | Q=-0.46 2 E(level): 3/2[521] band; α=10.82, B=0.0068. |
63.916 | 5/2+ | 0.46 µs 4 | Q=2.43 7, μ=-0.464 11 E(level): 5/2[642] band; α=7.76, B=-0.0145. |
115.717 | 7/2+ | E(level): 5/2[642] band; α=7.76, B=-0.0145. | |
131.451 | 7/2- | 100 ps 10 | E(level): 3/2[521] band; α=10.82, B=0.0068. |
180.229 | 9/2+ | E(level): 5/2[642] band; α=7.76, B=-0.0145. | |
226.983 | 9/2- | 16.7 ps 15 | E(level): 3/2[521] band; α=10.82, B=0.0068. |
272.22 | 11/2+ | E(level): 5/2[642] band; α=7.76, B=-0.0145. | |
347.05 | 11/2- | 12.2 ps 10 | E(level): 3/2[521] band; α=10.82, B=0.0068. |
361.04 | 13/2+ | E(level): 5/2[642] band; α=7.76, B=-0.0145. | |
426.539 | 11/2- | 18.5 µs 23 % IT = 100 | E(level): 11/2[505] bandhead. |
434.426 | 5/2- | < 0.1 ns | E(level): 5/2[523] band; α=11.46. |
474.630 | 3/2+ | < 0.1 ns | E(level): 3/2[402] band; α=10.04. |
478.62 | 13/2- | 7.3 ps 6 | E(level): 3/2[521] band; α=10.82, B=0.0068. |
508.93 | 15/2+ | XREF: O(513). | |
514.671 | 7/2- | E(level): 5/2[523] band; α=11.46. | |
524.847 | 5/2+ | E(level): 3/2[402] band; α=10.04. | |
579.40 | (13/2-) | E(level): 11/2[505] bandhead. | |
607.589 | 7/2(+) | E(level): 3/2[402] band; α=10.04. | |
617.38 | 9/2- | E(level): 5/2[523] band; α=11.46. | |
640.33 | 15/2- | 4.3 ps 3 | E(level): 3/2[521] band; α=10.82, B=0.0068. |
664.44 | 9/2+ | E(level): 3/2[402] band; α=10.04. | |
682.82 | 1/2+ | E(level): 1/2[400] bandhead. | |
683.236 | 3/2+ | < 0.3 ns | E(level): 3/2[651] band. |
701.39 | (1/2)- | E(level): 1/2[521] band. | |
E(level) | Jπ(level) | T1/2(level) | Comments |
741.72 | 9/2+ | E(level): 3/2[651] band. | |
746.9 | (3/2-) | E(level): 1/2[521] band. | |
751.436 | 3/2+ | E(level): 1/2[400] bandhead. | |
762.670 | 3/2- | E(level): 3/2[532] bandhead. | |
771.302 | (7/2+) | E(level): 3/2[651] band. | |
793.67 | 1/2- | E(level): 1/2[530] band; α=5.6, a=-0.10. | |
801.32 | 17/2- | 2.6 ps 2 | E(level): 3/2[521] band; α=10.82, B=0.0068. |
806.67 | 11/2+ | E(level): 3/2[651] band. | |
809.13 | 3/2- | XREF: E(816). E(level): 1/2[530] band; α=5.6, a=-0.10. | |
840 | (5/2-) | XREF: E(845)J(834)M(842)O(837). | |
840.42 | 7/2- | E(level): 1/2[521] band. | |
849.3 | 11/2+,13/2+ | Jπ(level): from angular distribution of the deuterons in coincidence with γ rays in 158Gd(p,dγ) (2014Ro25). | |
887.93 | 5/2- | E(level): 1/2[530] band; α=5.6, a=-0.10. | |
964 | (9/2-) | XREF: E(967)J(965)M(961)O(962). E(level): 1/2[530] band; α=5.6, a=-0.10. | |
981 | (9/2-) | E(level): 1/2[521] band. | |
1002.53 | 19/2- | 1.81 ps 16 | E(level): 3/2[521] band; α=10.82, B=0.0068. |
1060 | (11/2-) | E(level): 1/2[530] band; α=5.6, a=-0.10. | |
1184.5 | XREF: E(1178)O(1175). | ||
1185.62 | 21/2- | 1.15 ps 17 | E(level): 3/2[521] band; α=10.82, B=0.0068. |
1231.50 | 5/2+,7/2,9/2+ | XREF: M(1227). | |
1349.13 | 1/2- | XREF: J(1354)O(1352). | |
1393 | (7/2-) | XREF: J(1391)O(1396). E(level): 5/2[512] expected bandhead (only first (7/2-) level known). | |
1399.3 | XREF: M(1403). | ||
1423.9 | 23/2- | 0.60 ps 5 | E(level): 3/2[521] band; α=10.82, B=0.0068. |
1437.2 | XREF: M(1433). | ||
E(level) | Jπ(level) | T1/2(level) | Comments |
1552.2 | 5/2+ | E(level): Any of the 1552, 1589, 1735 or 1825 levels is a possible candidate for ν5/2[402] configuration (2014Ro25, 158Gd(p,dγ). Jπ(level): from angular distribution of the deuterons in coincidence with γ rays in 158Gd(p,dγ) (2014Ro25). | |
1589.68 | 1/2,3/2 | XREF: J(1593). | |
1589.8 | 3/2+,5/2+ | Possibly same level as 1589.7. E(level): Any of the 1552, 1589, 1735 or 1825 levels is a possible candidate for ν5/2[402] configuration (2014Ro25, 158Gd(p,dγ). Jπ(level): from angular distribution of the deuterons in coincidence with γ rays in 158Gd(p,dγ) (2014Ro25). | |
1623.1 | 25/2- | E(level): 3/2[521] band; α=10.82, B=0.0068. | |
1667.58 | (1/2,3/2)- | XREF: O(1670). | |
1735.6 | 5/2+ | E(level): Any of the 1552, 1589, 1735 or 1825 levels is a possible candidate for ν5/2[402] configuration (2014Ro25, 158Gd(p,dγ). Jπ(level): from angular distribution of the deuterons in coincidence with γ rays in 158Gd(p,dγ) (2014Ro25). | |
1736.4 | 1/2-,3/2- | XREF: O(1731). | |
1825 | 7/2+ | E(level): 7/2[404] bandhead. | |
1825.6 | 5/2+ | E(level): Any of the 1552, 1589, 1735 or 1825 levels is a possible candidate for ν5/2[402] configuration (2014Ro25, 158Gd(p,dγ). Jπ(level): from angular distribution of the deuterons in coincidence with γ rays in 158Gd(p,dγ) (2014Ro25). | |
1836.2 | 1/2-,3/2- | XREF: J(1833). | |
1896.36 | 1/2+,3/2+ | XREF: E(1899). | |
1905.9 | (11/2-) | Configuration=ν9/2[514] (2014Ro25). Jπ(level): from angular distribution of the deuterons in coincidence with γ rays in 158Gd(p,dγ) (2014Ro25). | |
1906.1 | Possiblysame level as 1905.9. | ||
1997.3 | 1/2+,3/2+ | XREF: E(2004). |
E(level) | E(gamma) | Comments |
131.451 | 131.438 | I(γ): From Coulomb excitation. Others: 28 7 from 157Eu β- decay, 8 4 from IT decay, and 44 6 from (n,γ) resonance. |
226.983 | 172.37 | E(γ): Poor energy fit; level energy difference is 172.78.. Differ by 3σ or more from calculated value I(γ): From Coulomb excitation; other: 73 13 from IT decay and 150 8 from (n,n’γ). Coulomb excitation: 92 4 |
347.05 | 120.1 | I(γ): From Coulomb excitation; other: 62 3 from (n,n’γ). |
434.426 | 318.710 | I(γ): From 157Eu β- decay (1986GrZS); other: 188 25 from Coulomb excitation, 44.8 17 from (n,γ) resonance, 31.4 17 from (n,n’γ) and 43 3 from (n,γ) E=th. | 379.905 | I(γ): From 157Eu β- decay (1986GrZS); other: 15.6 12 Coulomb excitation and 7.7 12 from (n,n’γ). | 434.388 | I(γ): From 157Eu β- decay (1986GrZS); other: 9.4 12 Coulomb excitation, and 3.20 20 from (n,n’γ) . |
514.671 | 450.761 | I(γ): From 157Eu β- decay (1986GrZS); other: Coulomb excitation value is 30 8, 99 5 from (n,n’γ), and 118 17 from (n,γ) E=resonance. |
524.847 | 344.61 | I(γ): From 157Eu β- decay (1986GrZS); other: 3.78 22 from (n,n’γ). | 460.923 | I(γ): From 157Eu β- decay (1986GrZS); other: 36.1 17 from (n,γ) E=thermal, 36.4 24 from (n,γ) E=resonance, 30.0 16 from (n,n’γ). | 470.389 | E(γ): Differ by 3σ or more from calculated value | 524.835 | I(γ): From 157Eu β- decay (1986GrZS); other: 11.0 15 from (n,γ) E=thermal, 7.9 4 from (n,n’γ), 7.4 22 from (n,γ) E=resonance. |
607.589 | 380.38 | E(γ): Differ by 3σ or more from calculated value | 491.89 | I(γ): From 157Eu β- decay (1986GrZS); other: 22.9 16 from (n,n’γ), 62 4 from (n,γ) E=thermal, and 42 8 from (n,γ) E=resonance. | 543.93 | E(γ): Differ by 3σ or more from calculated value I(γ): other: 21~4 (157Eu β- decay) | 553.02 | I(γ): other: 22~4 (157Eu β- decay) |
640.33 | 131.3 | M(γ): From coulex dataset | 279.4 | M(γ): From coulex dataset |
683.236 | 208.621 | I(γ): may include transition from 1/2+ level at 682.8 keV | 567.58 | I(γ): From 157Eu β- decay (1986GrZS); other: 8.3 10 from (n,n’γ), 5.9 18 from (n,γ) E=thermal, and 7.8 14 from (n,γ) E=resonance. | 619.303 | I(γ): may include transition from 1/2+ level at 682.8 keV | 683.162 | I(γ): may include transition from 1/2+ level at 682.8 keV |
686.667 | 161.820 | I(γ): from 157Eu β- decay; other: 3.4 8 from 156Gd(n,γ) E=resonance and 7.1 11 from 157Gd(n,n’γ). | 622.751 | I(γ): from 157Eu β- decay; other: 68 6 from 156Gd(n,γ) E=resonance and 48.9 25 from 157Gd(n,n’γ). |
701.39 | 638 | E(γ): Placement requires M2 character, so placement is doubtful. |
729.23 | 613.73 | E(γ): Placement requires M2 character, so placement is doubtful. Also 2014Ro25 ((158Gd(p,dγ)) did not observe 614γ |
E(level) | E(gamma) | Comments |
751.436 | 635.75 | I(γ): from 157Eu β- decay; other: 8.5 8 from 156Gd(n,γ) E=thermal and 4.6 3 from 157Gd(n,n’γ). |
762.670 | 238.49 | E(γ): Differ by 3σ or more from calculated value |
771.302 | 543.93 | E(γ): Differ by 3σ or more from calculated value | 707.46 | I(γ): from 157Eu β- decay; other: 57 9 from 156Gd(n,γ) E=thermal and 28.3 18 from 157Gd(n,n’γ). |
788.54 | 657.07 | I(γ): from 157Gd(n,n’γ); other: 80 8 from 156Gd(n,γ) E=thermal. |
793.67 | 358.92 | I(γ): from 156Gd(n,γ) E=resonance; other: 17.2 13 from 157Gd(n,n’γ). | 739.10 | I(γ): from 156Gd(n,γ) E=resonance; other: 35 4 from 157Gd(n,n’γ) and 8.3 5 from 156Gd(n,γ) E=thermal |
809.13 | 284.26 | E(γ): average of 284.09~23 (156Gd(n,γ) E=resonance) and 284.44~11 (157Gd(n,n’γ)) I(γ): from 156Gd(n,γ) E=resonance; other: 14.3 7 from 157Gd(n,n’γ) and 8 6 from 156Gd(n,γ) E=thermal | 334.36 | I(γ): from 156Gd(n,γ) E=resonance; other: 74 4 from 157Gd(n,n’γ) and 9.2 17 from 156Gd(n,γ) E=thermal | 809.25 | I(γ): from 156Gd(n,γ) E=resonance; other: 23.3 13 from 157Gd(n,n’γ) and 24.0 5 from 156Gd(n,γ) E=thermal |
814.11 | 339.19 | I(γ): from 157Gd(n,n’γ); other: 44 8 from 156Gd(n,γ) E=thermal and 13 7 from 157Eu β- decay. | 682.60 | I(γ): from 157Eu β- decay relative to Iγ of 698. | 698.51 | E(γ): weighted average of: 698.30~9 (156Gd(n,γ) E=th), 698.32~10 (157Gd(n,n’γ)), 698.59~16 (156Gd(n,γ) E=resonance), and 698.62~5 (157Eu β- decay) I(γ): from 157Gd(n,n’γ); other: 77 6 from 156Gd(n,γ) E=thermal. | 759.75 | I(γ): from 157Gd(n,n’γ); other: 54 5 from 156Gd(n,γ) E=thermal. |
816.50 | 685.14 | I(γ): from 157Gd(n,n’γ); other: 24 4 from 156Gd(n,γ) E=thermal. | 816.50 | I(γ): from 157Gd(n,n’γ); other: 25.8 19 from 156Gd(n,γ) E=thermal. |
816.574 | 762.7 | E(γ): Multiply placed with intensity suitably divided I(γ): Multiply placed with intensity suitably divided |
840.42 | 613.10 | E(γ): weighted average of: 612.94~22 (156Gd(n,γ) E=th) and 613.20~21 (157Gd(n,n’γ)) I(γ): from 157Gd(n,n’γ); other: 39 8 from 156Gd(n,γ) E=thermal. | 840.9 | E(γ): average of: 840.68~9 (157Gd(n,n’γ)) and 841.06~9 (156Gd(n,γ) E=th) |
919.31 | 647.65 | E(γ): average of: 647.57~17 (157Gd(n,n’γ)) and 647.75~19 (156Gd(n,γ) E=th). Differ by 3σ or more from calculated value I(γ): from 157Gd(n,n’γ); other: 69 12 from 156Gd(n,γ) E=thermal. | 803.35 | E(γ): Differ by 3σ or more from calculated value | 865.28 | E(γ): weighted average of: 865.05~20 (157Eu β- decay), 865.22~5 (157Gd(n,n’γ)), and 865.48~8 (156Gd(n,γ) E=th). Differ by 3σ or more from calculated value |
1002.53 | 171.3 | M(γ): From coulex dataset |
1049.68 | 934.24 | E(γ): Differ by 3σ or more from calculated value I(γ): from 157Gd(n,n’γ); other: 27 7 from 157Eu β- decay. |
1059.67 | 584.92 | I(γ): from 156Gd(n,γ) E=thermal; other: 44 5 from 157Gd(n,n’γ) |
E(level) | E(gamma) | Comments |
1247.20 | 560.1 | I(γ): from 156Gd(n,γ) E=thermal; other: 34 9 from 156Gd(n,γ) E=resonance relative to 722 γ. |
Model and theoretical discussions of interest:
Occupation numbers of the 11/2[505] neutron state (1984Pe03).
Mixing of the n=4 and 6 Nilsson states (1971Ga34).
Wave functions, level energies, B(E2), and cross sections (1970Ka47,1971Ma41,1973Ga29,1975Hi01,1996Pr02).
Energy spacings in 3/2- band in terms of Coriolis mixing with 1/2- band (1974Jo06); other level energies (1994Pr04,1996Pr02).
γ branching (1979Ka11).
Moments (1970Va02,1973Ba85,1973Bu22,1973RaXR,1974Ba18).
Cluster decay probabilities (2003Gu13).
Isotope shifts (2011Ji11)
Scissors-mode strength (2013Kr11,2013Kr07).
Levels: Below 600 keV the band structure and band assignments in 157Gd are well established. Above this energy, the experimental data and the theoretical considerations indicate that the band structure is complex and the assignments are not unambiguous. In fact, above 600 keV, most Nilsson orbitals have been assigned to different sets of levels in different studies. Also, many levels have not been given band assignments. Even for the existing band assignments, the deviations between the observed and theoretical (d,p) and (d,t) cross sections suggest more complex Nilsson orbital mixtures or additional unresolved levels. See 1970Ka47 for theoretical cross sections with and without Coriolis coupling.
Levels: Accordong to 2003Bo25 for Jπ assignments from (n,n’γ) and (n,γ) reactions definite values instead of tentative were adopted for levels populated by primary γ rays decaying the 1/2+, S(n)+x resonance based on the following rather empirical arguments:
Levels: (i) primary transitions are of dipole type (quadrupole type or higher are extremely rare);
Levels: (ii) primary E1 transitions in heavy nuclei can be distinguish from M1 transitions (E1’s being on average stronger by a factor of seven than M1’s).