ADOPTED LEVELS, GAMMAS for 251Cf
Author: C. Morse | Citation: Nucl. Data Sheets 189, 111 (2023) | Cutoff date: 23-Sep-2022
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-377 keV 6 | S(n)= 5107 keV 4 | S(p)= 6106 keV 5 | Q(α)= 6177.0 keV 9 | ||
Reference: 2021Wa16 |
References: | |||
A | 251Bk β- decay | B | 251Es ε decay |
C | 255Fm α decay | D | 250Cf(d,p) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0 | ABCD | 1/2+ | 898 y 44 % SF = ? % α ≈ 100 | |||||
24.826 12 | ABCD | 3/2+ | 24.824 15 | 100 | M1+E2 | 0 | 1/2+ | |
47.832 14 | ABCD | 5/2+ | 23.001 17 47.84 2 | 100 | (M1+E2) E2 | 24.826 0 | 3/2+ 1/2+ | |
105.738 20 | CD | 7/2+ | 57.92 3 80.92 5 | 70 9 100 9 | (M1+E2) E2 | 47.832 24.826 | 5/2+ 3/2+ | |
106.309 18 | BCD | 7/2+ | 38 ns 2 | 0.57? 58.48 2 81.48 2 | 80 6 100 8 | M1(+E2) E2 | 105.738 47.832 24.826 | 7/2+ 5/2+ 3/2+ |
146.729 21 | CD | 9/2+ | 41.0 1 98.88 2 | 54 15 100 11 | [E2] | 105.738 47.832 | 7/2+ 5/2+ | |
166.303 23 | CD | 9/2+ | 60.00 2 | 100 | M1(+E2) | 106.309 | 7/2+ | |
177.602 19 | ABCD | 3/2+ | 71.5 1 129.8 1 152.78 2 177.59 3 | ≈6.9 65 5 40 3 100 7 | E2 M1 M1 M1+E2 | 106.309 47.832 24.826 0 | 7/2+ 5/2+ 3/2+ 1/2+ | |
211.530 20 | ABCD | 5/2+ | 163.69 2 186.66 5 211.55 5 | 100 8 5.5 8 6.5 10 | M1 [M1] | 47.832 24.826 0 | 5/2+ 3/2+ 1/2+ | |
237.71 4 | CD | (11/2+) | 91.00 5 131.95 5 | 19 3 100 12 | (E2) | 146.729 105.738 | 9/2+ 7/2+ | |
239.33 3 | C | 11/2+ | 73.05 2 133.04 5 | 100 11 24 3 | M1(+E2) (E2) | 166.303 106.309 | 9/2+ 7/2+ | |
258.514 18 | CD | 7/2+ | 111.78 5 152.78 2 210.70 4 233.69 2 | 100 391 30 61 9 76 5 | [M1] [M1] [E2] | 146.729 105.738 47.832 24.826 | 9/2+ 7/2+ 5/2+ 3/2+ | |
295.97 3 | CD | (13/2+) | 149.24 2 | 100 | [E2] | 146.729 | 9/2+ | |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
319.643 25 | CD | 9/2+ | 172.88 3 213.90 5 271.88 5 | 100 12 47 5 ≈12 | [M1] [M1] | 146.729 105.738 47.832 | 9/2+ 7/2+ 5/2+ | |
325.29 3 | C | (13/2+) | 85.98 2 158.96 2 | 100 11 56 4 | (M1) [E2] | 239.33 166.303 | 11/2+ 9/2+ | |
370.47 3 | C | 11/2- | 1.3 µs 1 | 45.2 1 131.13 5 204.17 2 264.15 3 | 3.3 8 100 12 89 7 3.9 3 | [E1] E1 E1 [M2] | 325.29 239.33 166.303 106.309 | (13/2+) 11/2+ 9/2+ 7/2+ |
392.33 5 | C | (11/2+) | 245.7 4 286.65 5 | 13 4 100 10 | 146.729 105.738 | 9/2+ 7/2+ | ||
420.0? | C | 182.3 3 ? | 100 | 237.71 | (11/2+) | |||
423.92 4 | C | (15/2+) | 184.59 3 | 100 | [E2] | 239.33 | 11/2+ | |
433.90 4 | C | 9/2- | 63.4 1 194.6 4 267.61 4 327.58 4 | 1.0E2 3 3.4 5 15.2 15 21.0 20 | (M1) [E1] [E1] | 370.47 239.33 166.303 106.309 | 11/2- 11/2+ 9/2+ 7/2+ | |
535.0? | C | 209.7 2 ? | 100 | 325.29 | (13/2+) | |||
543.99 3 | CD | 5/2+ | 285.49 3 332.43 4 366.4 1 397.5 2 437.7 1 496.2 2 519.2 2 543.9 2 | 6.5 7 44 4 100 7 0.044 9 28.9 21 3.5 3 3.9 3 3.5 4 | [M1] (M1) (M1) [M1] [M1] [M1] [E2] | 258.514 211.530 177.602 146.729 106.309 47.832 24.826 0 | 7/2+ 5/2+ 3/2+ 9/2+ 7/2+ 5/2+ 3/2+ 1/2+ | |
569 | D | (15/2-) | ||||||
590.01 3 | C | (7/2+) | 197.4 4 270.37 3 331.52 4 350.6 2 378.5 1 412.2 2 423.7 1 443.2 1 483.7 2 542.2 2 565.2 2 | 0.27 8 13.5 12 69 8 0.31 4 100 8 1.27 12 27.3 20 2.46 20 13.8 12 10.8 12 2.50 20 | [M1] [M1] (M1) [M1] [M1] [M1] | 392.33 319.643 258.514 239.33 211.530 177.602 166.303 146.729 106.309 47.832 24.826 | (11/2+) 9/2+ 7/2+ 11/2+ 5/2+ 3/2+ 9/2+ 9/2+ 7/2+ 5/2+ 3/2+ | |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
601.04 12 | CD | 3/2- | 553.0 2 577.5 3 601.0 4 | 100 17 100 11 ≈57 | 47.832 24.826 0 | 5/2+ 3/2+ 1/2+ | ||
625.12 17 | CD | 7/2- | 478.3 2 577.5 3 | 100 438 50 | 146.729 47.832 | 9/2+ 5/2+ | ||
632.02 14 | CD | 1/2- | 454.4 3 607.1 4 632.1 2 | ≈24 62 10 100 10 | 177.602 24.826 0 | 3/2+ 3/2+ 1/2+ | ||
648.94 4 | CD | (9/2+) | 256.67 5 329.27 4 390.4 1 409.6 1 482.5 3 502.1 2 601.0 2 | 19.1 18 98 9 100 7 28 3 12.7 14 16.7 14 3.8 4 | [M1] [M1] [M1] [M1] | 392.33 319.643 258.514 239.33 166.303 146.729 47.832 | (11/2+) 9/2+ 7/2+ 11/2+ 9/2+ 9/2+ 5/2+ | |
683 | D | (9/2+) | ||||||
691 | D | 11/2- | ||||||
708.05 14 | CD | 5/2- | 530.4 4 660.2 2 683.2 3 | ≈10 100 8 29 6 | 177.602 47.832 24.826 | 3/2+ 5/2+ 3/2+ | ||
720.50 12 | C | (11/2+) | 395.3 2 400.9 2 573.7 2 614.5 4 | 24 4 100 14 23.1 21 5.5 7 | 325.29 319.643 146.729 105.738 | (13/2+) 9/2+ 9/2+ 7/2+ | ||
729 | D | |||||||
758 | D | (11/2+) | ||||||
774? | CD | (3/2+) | 774? | 100 | 0 | 1/2+ | ||
858 | D | |||||||
942.48 13 | C | (5/2-) | 731.0 2 764.7 3 836.2 2 | 10.0 11 17.5 18 100 8 | 211.530 177.602 106.309 | 5/2+ 3/2+ 7/2+ | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
973.98 12 | CD | (9/2+) | 734.5 2 807.7 2 867.8 2 | 17.3 19 100 8 91 8 | 239.33 166.303 106.309 | 11/2+ 9/2+ 7/2+ | ||
981.51 10 | CD | (3/2-) | 349.6 3 381.0 3 770.0 4 803.8 2 956.6 2 981.4 2 | ≈6.7 ≈13.3 53 7 73 6 19.3 20 100 10 | (M1) | 632.02 601.04 211.530 177.602 24.826 0 | 1/2- 3/2- 5/2+ 3/2+ 3/2+ 1/2+ | |
1009.13 8 | C | (5/2-) | 301.0 3 408.2 2 750.5 2 797.6 2 831.9 2 903.1 3 961.2 2 984.2 2 | ≈4.5 ≈18.2 39 4 85 7 55 5 12.7 19 42 4 100 11 | 708.05 601.04 258.514 211.530 177.602 105.738 47.832 24.826 | 5/2- 3/2- 7/2+ 5/2+ 3/2+ 7/2+ 5/2+ 3/2+ | ||
1015 | D | |||||||
1043.77 11 | C | (7/2-) | 724.1 4 785.4 2 831.9 2 938.1 3 996.1 2 | 45 5 8.2 9 55 5 14.5 19 100 8 | 319.643 258.514 211.530 105.738 47.832 | 9/2+ 7/2+ 5/2+ 7/2+ 5/2+ | ||
1050 | D | |||||||
1061 | D | |||||||
1077.56 7 | C | (9/2,11/2+) | 643.6 3 707.0 3 838.4 3 911.3 1 971.2 1 | ≈3.4 10.3 21 ≈7.0 41 4 100 8 | 433.90 370.47 239.33 166.303 106.309 | 9/2- 11/2- 11/2+ 9/2+ 7/2+ | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1086.46 14 | CD | (9/2-) | 652.5 2 715.8 4 847.0 3 920.5 3 | 100 9 67 12 61 9 58 12 | 433.90 370.47 239.33 166.303 | 9/2- 11/2- 11/2+ 9/2+ | ||
1094.57 18 | C | (9/2-) | 702.3 3 947.8 3 988.8 3 | 42 9 48 6 100 16 | 392.33 146.729 105.738 | (11/2+) 9/2+ 7/2+ | ||
1146 | D | |||||||
1155.80 19 | C | (11/2-) | 763.5 4 859.8 3 918.1 3 | ≈100 90 15 ≈50 | 392.33 295.97 237.71 | (11/2+) (13/2+) (11/2+) | ||
1183 | D | (7/2-) | ||||||
1185.50 18 | C | (5/2,7/2) | 641.6 3 1019.2 3 1079.1 3 | ≈26.3 26 8 100 14 | 543.99 166.303 106.309 | 5/2+ 9/2+ 7/2+ | ||
1222 | D | |||||||
1249.98 13 | C | (7/2+) | 816.1 3 991.6 3 1038.3 3 1072.3 3 1083.9 3 1144.0 4 | 64 7 42 7 42 16 91 13 100 13 ≈13 | 433.90 258.514 211.530 177.602 166.303 105.738 | 9/2- 7/2+ 5/2+ 3/2+ 9/2+ 7/2+ | ||
1250 | D | (1/2-) | ||||||
1262 | D | (5/2-) | ||||||
1304 | D | (11/2-) | ||||||
1326 | D | (9/2-) | ||||||
1335 | D | (3/2-) | ||||||
1374 | D |
E(level): From a least-squares fit to Eγ or Eα (if no γ’s observed), or 250Cf(d,p) (levels not seen in 255Fm α-decay).
T1/2(level): From 255Fm α decay, unless otherwise noted.
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - ν1/2+[620]. | |||||||
0 | 1/2+ | 898 y 44 % SF = ? % α ≈ 100 | |||||
24.826 12 | 3/2+ | 24.824 15 | 100 | M1+E2 | 0 | 1/2+ | |
47.832 14 | 5/2+ | 23.001 17 47.84 2 | 100 | (M1+E2) E2 | 24.826 0 | 3/2+ 1/2+ | |
105.738 20 | 7/2+ | 57.92 3 80.92 5 | 70 9 100 9 | (M1+E2) E2 | 47.832 24.826 | 5/2+ 3/2+ | |
146.729 21 | 9/2+ | 41.0 1 98.88 2 | 54 15 100 11 | [E2] | 105.738 47.832 | 7/2+ 5/2+ | |
237.71 4 | (11/2+) | 91.00 5 131.95 5 | 19 3 100 12 | (E2) | 146.729 105.738 | 9/2+ 7/2+ | |
295.97 3 | (13/2+) | 149.24 2 | 100 | [E2] | 146.729 | 9/2+ | |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 2 - ν7/2+[613]. | |||||||
106.309 18 | 7/2+ | 38 ns 2 | |||||
166.303 23 | 9/2+ | 60.00 2 | 100 | M1(+E2) | 106.309 | 7/2+ | |
239.33 3 | 11/2+ | 73.05 2 133.04 5 | 100 11 24 3 | M1(+E2) (E2) | 166.303 106.309 | 9/2+ 7/2+ | |
325.29 3 | (13/2+) | 85.98 2 158.96 2 | 100 11 56 4 | (M1) [E2] | 239.33 166.303 | 11/2+ 9/2+ | |
423.92 4 | (15/2+) | 184.59 3 | 100 | [E2] | 239.33 | 11/2+ | |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 3 - ν3/2+[622]. | |||||||
177.602 19 | 3/2+ | ||||||
211.530 20 | 5/2+ | 163.69 2 186.66 5 211.55 5 | 100 8 5.5 8 6.5 10 | M1 [M1] | 47.832 24.826 0 | 5/2+ 3/2+ 1/2+ | |
258.514 18 | 7/2+ | 111.78 5 152.78 2 210.70 4 233.69 2 | 100 391 30 61 9 76 5 | [M1] [M1] [E2] | 146.729 105.738 47.832 24.826 | 9/2+ 7/2+ 5/2+ 3/2+ | |
319.643 25 | 9/2+ | 172.88 3 213.90 5 271.88 5 | 100 12 47 5 ≈12 | [M1] [M1] | 146.729 105.738 47.832 | 9/2+ 7/2+ 5/2+ | |
392.33 5 | (11/2+) | 245.7 4 286.65 5 | 13 4 100 10 | 146.729 105.738 | 9/2+ 7/2+ | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 4 - ν5/2+[622]. | |||||||
543.99 3 | 5/2+ | ||||||
590.01 3 | (7/2+) | 197.4 4 270.37 3 331.52 4 350.6 2 378.5 1 412.2 2 423.7 1 443.2 1 483.7 2 542.2 2 565.2 2 | 0.27 8 13.5 12 69 8 0.31 4 100 8 1.27 12 27.3 20 2.46 20 13.8 12 10.8 12 2.50 20 | [M1] [M1] (M1) [M1] [M1] [M1] | 392.33 319.643 258.514 239.33 211.530 177.602 166.303 146.729 106.309 47.832 24.826 | (11/2+) 9/2+ 7/2+ 11/2+ 5/2+ 3/2+ 9/2+ 9/2+ 7/2+ 5/2+ 3/2+ | |
648.94 4 | (9/2+) | 256.67 5 329.27 4 390.4 1 409.6 1 482.5 3 502.1 2 601.0 2 | 19.1 18 98 9 100 7 28 3 12.7 14 16.7 14 3.8 4 | [M1] [M1] [M1] [M1] | 392.33 319.643 258.514 239.33 166.303 146.729 47.832 | (11/2+) 9/2+ 7/2+ 11/2+ 9/2+ 9/2+ 5/2+ | |
720.50 12 | (11/2+) | 395.3 2 400.9 2 573.7 2 614.5 4 | 24 4 100 14 23.1 21 5.5 7 | 325.29 319.643 146.729 105.738 | (13/2+) 9/2+ 9/2+ 7/2+ | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 5 - ν1/2-[750]. | |||||||
601.04 12 | 3/2- | ||||||
625.12 17 | 7/2- | 478.3 2 577.5 3 | 100 438 50 | 146.729 47.832 | 9/2+ 5/2+ | ||
632.02 14 | 1/2- | 454.4 3 607.1 4 632.1 2 | ≈24 62 10 100 10 | 177.602 24.826 0 | 3/2+ 3/2+ 1/2+ | ||
708.05 14 | 5/2- | 530.4 4 660.2 2 683.2 3 | ≈10 100 8 29 6 | 177.602 47.832 24.826 | 3/2+ 5/2+ 3/2+ | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 6 - |[ν7/2+[613]~#2-|]3/2- | |||||||
981.51 10 | (3/2-) | ||||||
1009.13 8 | (5/2-) | 301.0 3 408.2 2 750.5 2 797.6 2 831.9 2 903.1 3 961.2 2 984.2 2 | ≈4.5 ≈18.2 39 4 85 7 55 5 12.7 19 42 4 100 11 | 708.05 601.04 258.514 211.530 177.602 105.738 47.832 24.826 | 5/2- 3/2- 7/2+ 5/2+ 3/2+ 7/2+ 5/2+ 3/2+ | ||
1043.77 11 | (7/2-) | 724.1 4 785.4 2 831.9 2 938.1 3 996.1 2 | 45 5 8.2 9 55 5 14.5 19 100 8 | 319.643 258.514 211.530 105.738 47.832 | 9/2+ 7/2+ 5/2+ 7/2+ 5/2+ | ||
1094.57 18 | (9/2-) | 702.3 3 947.8 3 988.8 3 | 42 9 48 6 100 16 | 392.33 146.729 105.738 | (11/2+) 9/2+ 7/2+ | ||
1155.80 19 | (11/2-) | 763.5 4 859.8 3 918.1 3 | ≈100 90 15 ≈50 | 392.33 295.97 237.71 | (11/2+) (13/2+) (11/2+) | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 7 - 3/2-[752]. | |||||||
1183 | (7/2-) | ||||||
1304 | (11/2-) | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 8 - ν1/2-[761]. | |||||||
1250 | (1/2-) | ||||||
1262 | (5/2-) | ||||||
1326 | (9/2-) | ||||||
1335 | (3/2-) |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
24.826 | 3/2+ | 24.824 15 | M1+E2 | 0.27 4 | 8.8×102 | α=8.8×102 22, α(L)=4.2×102 12, α(M)=3.4E2 7, α(N)=95 20, α(O)=24 5, α(P)=3.9 8, α(Q)=0.0770 11 | |
47.832 | 5/2+ | 23.001 17 | (M1+E2) | 0.04 LT | 176 | α=176 13, α(L)=9 7, α(M)=122 5, α(N)=33.9 13, α(O)=8.78 32, α(P)=1.69 5, α(Q)=0.0976 14 | |
5/2+ | 47.84 2 | E2 | 737 | α=737 10, α(L)=531 8, α(M)=151.2 21, α(N)=42.5 6, α(O)=10.50 15, α(P)=1.647 23, α(Q)=0.00386 5 | |||
105.738 | 7/2+ | 57.92 3 | (M1+E2) | 0.23 LT | 48 | α=48 6, α(L)=36 5, α(M)=9.0 13, α(N)=2.5 4, α(O)=0.65 9, α(P)=0.121 14, α(Q)=0.00624 15 | |
7/2+ | 80.92 5 | E2 | 59.9 | α=59.9 9, α(L)=43.1 6, α(M)=12.30 18, α(N)=3.46 5, α(O)=0.856 12, α(P)=0.1359 19, α(Q)=0.000432 6 | |||
106.309 | 7/2+ | 38 ns 2 | 58.48 2 | M1(+E2) | 0.12 LT | 42.4 | α=42.4 18, α(L)=31.7 13, α(M)=7.9 4, α(N)=2.18 10, α(O)=0.565 26, α(P)=0.108 4, α(Q)=0.00615 9 |
7/2+ | 38 ns 2 | 81.48 2 | E2 | 58.0 | B(E2)(W.u.)=0.47 6, α=58.0 8, α(L)=41.7 6, α(M)=11.91 17, α(N)=3.35 5, α(O)=0.828 12, α(P)=0.1316 18, α(Q)=0.000420 6 | ||
146.729 | 9/2+ | 98.88 2 | [E2] | 23.44 | α=23.44 33, α(L)=16.88 24, α(M)=4.81 7, α(N)=1.355 19, α(O)=0.335 5, α(P)=0.0536 8, α(Q)=0.0001967 28 | ||
166.303 | 9/2+ | 60.00 2 | M1(+E2) | 0.25 LT | 44 | α=44 6, α(L)=33 4, α(M)=8.3 13, α(N)=2.3 4, α(O)=0.59 9, α(P)=0.110 14, α(Q)=0.00561 15 | |
177.602 | 3/2+ | 71.5 1 | E2 | 107.5 | α=107.5 17, α(L)=77.4 12, α(M)=22.08 34, α(N)=6.21 10, α(O)=1.535 24, α(P)=0.243 4, α(Q)=0.000714 11 | ||
3/2+ | 129.8 1 | M1 | 4.01 | α=4.01 6, α(L)=3.01 4, α(M)=0.739 10, α(N)=0.2048 29, α(O)=0.0532 8, α(P)=0.01027 15, α(Q)=0.000605 9 | |||
3/2+ | 152.78 2 | M1 | 11.36 | α=11.36 16, α(K)=8.85 12, α(L)=1.884 26, α(M)=0.463 6, α(N)=0.1283 18, α(O)=0.0333 5, α(P)=0.00644 9, α(Q)=0.000378 5 | |||
3/2+ | 177.59 3 | M1+E2 | 0.44 8 | 6.52 | α=6.52 30, α(K)=4.87 29, α(L)=1.223 17, α(M)=0.308 5, α(N)=0.0856 14, α(O)=0.02203 33, α(P)=0.00414 6, α(Q)=0.000210 12 | ||
211.530 | 5/2+ | 163.69 2 | M1 | 9.35 | α=9.35 13, α(K)=7.28 10, α(L)=1.547 22, α(M)=0.380 5, α(N)=0.1054 15, α(O)=0.0273 4, α(P)=0.00528 7, α(Q)=0.000311 4 | ||
5/2+ | 186.66 5 | [M1] | 6.45 | α=6.45 9, α(K)=5.03 7, α(L)=1.065 15, α(M)=0.262 4, α(N)=0.0725 10, α(O)=0.01881 26, α(P)=0.00363 5, α(Q)=0.0002134 30 | |||
237.71 | (11/2+) | 131.95 5 | (E2) | 6.24 | α=6.24 9, α(L)=4.50 6, α(M)=1.281 18, α(N)=0.360 5, α(O)=0.0893 13, α(P)=0.01440 20, α(Q)=6.85×10-5 10 | ||
239.33 | 11/2+ | 73.05 2 | M1(+E2) | 0.2 LT | 22.7 | α=22.7 15, α(L)=16.9 11, α(M)=4.22 31, α(N)=1.17 9, α(O)=0.303 22, α(P)=0.0576 33, α(Q)=0.00317 7 | |
11/2+ | 133.04 5 | (E2) | 6.01 | α=6.01 8, α(L)=4.33 6, α(M)=1.234 17, α(N)=0.347 5, α(O)=0.0860 12, α(P)=0.01388 20, α(Q)=6.66×10-5 9 | |||
258.514 | 7/2+ | 152.78 2 | [M1] | 11.36 | α=11.36 16, α(K)=8.85 12, α(L)=1.884 26, α(M)=0.463 6, α(N)=0.1283 18, α(O)=0.0333 5, α(P)=0.00644 9, α(Q)=0.000378 5 | ||
7/2+ | 210.70 4 | [M1] | 4.59 | α=4.59 6, α(K)=3.58 5, α(L)=0.755 11, α(M)=0.1856 26, α(N)=0.0514 7, α(O)=0.01334 19, α(P)=0.00258 4, α(Q)=0.0001512 21 | |||
7/2+ | 233.69 2 | [E2] | 0.639 | α=0.639 9, α(K)=0.1179 17, α(L)=0.376 5, α(M)=0.1059 15, α(N)=0.0298 4, α(O)=0.00741 10, α(P)=0.001229 17, α(Q)=1.161×10-5 16 | |||
295.97 | (13/2+) | 149.24 2 | [E2] | 3.74 | α=3.74 5, α(K)=0.1473 21, α(L)=2.59 4, α(M)=0.736 10, α(N)=0.2071 29, α(O)=0.0514 7, α(P)=0.00833 12, α(Q)=4.51×10-5 6 | ||
319.643 | 9/2+ | 172.88 3 | [M1] | 8.01 | α=8.01 11, α(K)=6.24 9, α(L)=1.324 19, α(M)=0.325 5, α(N)=0.0902 13, α(O)=0.02340 33, α(P)=0.00452 6, α(Q)=0.000266 4 | ||
9/2+ | 213.90 5 | [M1] | 4.40 | α=4.40 6, α(K)=3.43 5, α(L)=0.724 10, α(M)=0.1779 25, α(N)=0.0493 7, α(O)=0.01279 18, α(P)=0.002470 35, α(Q)=0.0001449 20 | |||
325.29 | (13/2+) | 85.98 2 | (M1) | 13.21 | α=13.21 19, α(L)=9.89 14, α(M)=2.434 34, α(N)=0.674 9, α(O)=0.1751 25, α(P)=0.0338 5, α(Q)=0.001999 28 | ||
(13/2+) | 158.96 2 | [E2] | 2.87 | α=2.87 4, α(K)=0.1545 22, α(L)=1.957 27, α(M)=0.556 8, α(N)=0.1564 22, α(O)=0.0388 5, α(P)=0.00631 9, α(Q)=3.67×10-5 5 | |||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
370.47 | 11/2- | 1.3 µs 1 | 45.2 1 | [E1] | 1.155 | B(E1)(W.u.)=1.9E-8 5, α=1.155 17, α(L)=0.859 13, α(M)=0.2196 33, α(N)=0.0599 9, α(O)=0.01447 22, α(P)=0.002120 32, α(Q)=5.36E-5 8 | |
11/2- | 1.3 µs 1 | 131.13 5 | E1 | 0.0741 | B(E1)(W.u.)=2.3E-8 4, α=0.0741 10, α(L)=0.0555 8, α(M)=0.01375 19, α(N)=0.00377 5, α(O)=0.000946 13, α(P)=0.0001619 23, α(Q)=5.94E-6 8 | ||
11/2- | 1.3 µs 1 | 204.17 2 | E1 | 0.1059 | B(E1)(W.u.)=5.5E-9 7, α=0.1059 15, α(K)=0.0811 11, α(L)=0.01857 26, α(M)=0.00458 6, α(N)=0.001258 18, α(O)=0.000318 4, α(P)=5.65E-5 8, α(Q)=2.350E-6 33 | ||
11/2- | 1.3 µs 1 | 264.15 3 | [M2] | 7.97 | B(M2)(W.u.)=0.0073 10, α=7.97 11, α(K)=5.28 7, α(L)=1.973 28, α(M)=0.526 7, α(N)=0.1483 21, α(O)=0.0384 5, α(P)=0.00724 10, α(Q)=0.000393 6 | ||
423.92 | (15/2+) | 184.59 3 | [E2] | 1.563 | α=1.563 22, α(K)=0.1501 21, α(L)=1.019 14, α(M)=0.289 4, α(N)=0.0812 11, α(O)=0.02017 28, α(P)=0.00330 5, α(Q)=2.296×10-5 32 | ||
433.90 | 9/2- | 63.4 1 | (M1) | 32.1 | α=32.1 5, α(L)=24.05 35, α(M)=5.92 9, α(N)=1.641 24, α(O)=0.426 6, α(P)=0.0824 12, α(Q)=0.00487 7 | ||
9/2- | 267.61 4 | [E1] | 0.0584 | α=0.0584 8, α(K)=0.0453 6, α(L)=0.00981 14, α(M)=0.002408 34, α(N)=0.000662 9, α(O)=0.0001684 24, α(P)=3.04×10-5 4, α(Q)=1.354E-6 19 | |||
9/2- | 327.58 4 | [E1] | 0.0380 | α=0.0380 5, α(K)=0.0297 4, α(L)=0.00621 9, α(M)=0.001520 21, α(N)=0.000418 6, α(O)=0.0001066 15, α(P)=1.946×10-5 27, α(Q)=9.09E-7 13 | |||
543.99 | 5/2+ | 285.49 3 | [M1] | 1.961 | α=1.961 27, α(K)=1.531 21, α(L)=0.322 5, α(M)=0.0790 11, α(N)=0.02188 31, α(O)=0.00568 8, α(P)=0.001096 15, α(Q)=6.42×10-5 9 | ||
5/2+ | 332.43 4 | (M1) | 1.286 | α=1.286 18, α(K)=1.005 14, α(L)=0.2106 29, α(M)=0.0517 7, α(N)=0.01431 20, α(O)=0.00371 5, α(P)=0.000717 10, α(Q)=4.20×10-5 6 | |||
5/2+ | 366.4 1 | (M1) | 0.984 | α=0.984 14, α(K)=0.769 11, α(L)=0.1608 23, α(M)=0.0395 6, α(N)=0.01093 15, α(O)=0.00284 4, α(P)=0.000548 8, α(Q)=3.20×10-5 4 | |||
5/2+ | 437.7 1 | [M1] | 0.604 | α=0.604 8, α(K)=0.473 7, α(L)=0.0985 14, α(M)=0.02416 34, α(N)=0.00669 9, α(O)=0.001735 24, α(P)=0.000335 5, α(Q)=1.959×10-5 27 | |||
5/2+ | 496.2 2 | [M1] | 0.429 | α=0.429 6, α(K)=0.336 5, α(L)=0.0698 10, α(M)=0.01712 24, α(N)=0.00474 7, α(O)=0.001229 17, α(P)=0.0002374 33, α(Q)=1.388×10-5 19 | |||
5/2+ | 519.2 2 | [M1] | 0.379 | α=0.379 5, α(K)=0.297 4, α(L)=0.0617 9, α(M)=0.01512 21, α(N)=0.00418 6, α(O)=0.001086 15, α(P)=0.0002097 29, α(Q)=1.226×10-5 17 | |||
5/2+ | 543.9 2 | [E2] | 0.0543 | α=0.0543 8, α(K)=0.0310 4, α(L)=0.01709 24, α(M)=0.00458 6, α(N)=0.001279 18, α(O)=0.000323 5, α(P)=5.71×10-5 8, α(Q)=1.546E-6 22 | |||
590.01 | (7/2+) | 270.37 3 | [M1] | 2.282 | α=2.282 32, α(K)=1.781 25, α(L)=0.375 5, α(M)=0.0920 13, α(N)=0.0255 4, α(O)=0.00661 9, α(P)=0.001277 18, α(Q)=7.48×10-5 10 | ||
(7/2+) | 331.52 4 | [M1] | 1.296 | α=1.296 18, α(K)=1.013 14, α(L)=0.2122 30, α(M)=0.0521 7, α(N)=0.01442 20, α(O)=0.00374 5, α(P)=0.000723 10, α(Q)=4.23×10-5 6 | |||
(7/2+) | 378.5 1 | (M1) | 0.900 | α=0.900 13, α(K)=0.703 10, α(L)=0.1470 21, α(M)=0.0361 5, α(N)=0.00999 14, α(O)=0.00259 4, α(P)=0.000500 7, α(Q)=2.93×10-5 4 | |||
(7/2+) | 423.7 1 | [M1] | 0.660 | α=0.660 9, α(K)=0.516 7, α(L)=0.1077 15, α(M)=0.0264 4, α(N)=0.00731 10, α(O)=0.001898 27, α(P)=0.000366 5, α(Q)=2.143×10-5 30 | |||
(7/2+) | 443.2 1 | [M1] | 0.584 | α=0.584 8, α(K)=0.457 6, α(L)=0.0952 13, α(M)=0.02334 33, α(N)=0.00646 9, α(O)=0.001676 23, α(P)=0.000324 5, α(Q)=1.893×10-5 27 | |||
(7/2+) | 483.7 2 | [M1] | 0.460 | α=0.460 6, α(K)=0.360 5, α(L)=0.0749 11, α(M)=0.01836 26, α(N)=0.00508 7, α(O)=0.001318 19, α(P)=0.000255 4, α(Q)=1.488×10-5 21 | |||
648.94 | (9/2+) | 329.27 4 | [M1] | 1.320 | α=1.320 18, α(K)=1.032 14, α(L)=0.2163 30, α(M)=0.0531 7, α(N)=0.01470 21, α(O)=0.00381 5, α(P)=0.000737 10, α(Q)=4.31×10-5 6 | ||
(9/2+) | 390.4 1 | [M1] | 0.826 | α=0.826 12, α(K)=0.646 9, α(L)=0.1350 19, α(M)=0.0331 5, α(N)=0.00917 13, α(O)=0.002379 33, α(P)=0.000459 6, α(Q)=2.69×10-5 4 | |||
(9/2+) | 409.6 1 | [M1] | 0.724 | α=0.724 10, α(K)=0.567 8, α(L)=0.1182 17, α(M)=0.0290 4, α(N)=0.00803 11, α(O)=0.002083 29, α(P)=0.000402 6, α(Q)=2.352×10-5 33 | |||
(9/2+) | 502.1 2 | [M1] | 0.415 | α=0.415 6, α(K)=0.325 5, α(L)=0.0676 9, α(M)=0.01657 23, α(N)=0.00459 6, α(O)=0.001190 17, α(P)=0.0002298 32, α(Q)=1.343×10-5 19 | |||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
981.51 | (3/2-) | 349.6 3 | (M1) | 1.119 | α=1.119 16, α(K)=0.875 12, α(L)=0.1832 26, α(M)=0.0449 6, α(N)=0.01244 18, α(O)=0.00323 5, α(P)=0.000624 9, α(Q)=3.65×10-5 5 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0 | 1/2+ | 898 y 44 % SF = ? % α ≈ 100 | CONF=|n1/2+[620] (2005Ah09) E(level): ν1/2+[620]. |
24.826 | 3/2+ | E(level): ν1/2+[620]. | |
47.832 | 5/2+ | E(level): ν1/2+[620]. | |
105.738 | 7/2+ | E(level): ν1/2+[620]. | |
106.309 | 7/2+ | 38 ns 2 | E(level): ν7/2+[613]. |
146.729 | 9/2+ | E(level): ν1/2+[620]. Jπ(level): Assignment and configuration supported by cross-section measurements in (d,p) (1990Ah02). | |
166.303 | 9/2+ | E(level): ν7/2+[613]. | |
177.602 | 3/2+ | CONF=|n3/2+[622] (2005Ah09) E(level): ν3/2+[622]. Jπ(level): Assignment and configuration supported by cross-section measurements in (d,p) (1990Ah02). | |
211.530 | 5/2+ | E(level): ν3/2+[622]. | |
237.71 | (11/2+) | E(level): ν1/2+[620]. Jπ(level): Assignment and configuration supported by cross-section measurements in (d,p) (1990Ah02). | |
239.33 | 11/2+ | E(level): ν7/2+[613]. Jπ(level): Assignment and configuration supported by cross-section measurements in (d,p) (1990Ah02). | |
258.514 | 7/2+ | E(level): ν3/2+[622]. Jπ(level): Assignment and configuration supported by cross-section measurements in (d,p) (1990Ah02). | |
295.97 | (13/2+) | E(level): ν1/2+[620]. | |
319.643 | 9/2+ | E(level): ν3/2+[622]. Jπ(level): Assignment and configuration supported by cross-section measurements in (d,p) (1990Ah02). | |
325.29 | (13/2+) | E(level): ν7/2+[613]. | |
392.33 | (11/2+) | E(level): ν3/2+[622]. | |
423.92 | (15/2+) | E(level): ν7/2+[613]. | |
543.99 | 5/2+ | CONF=|n5/2+[622] (2005Ah09) E(level): ν5/2+[622]. | |
590.01 | (7/2+) | E(level): ν5/2+[622]. | |
601.04 | 3/2- | E(level): ν1/2-[750]. Jπ(level): Assignment is from (d,p) (1990Ah02). | |
625.12 | 7/2- | E(level): ν1/2-[750]. Jπ(level): Assignment is from (d,p) (1990Ah02). | |
632.02 | 1/2- | CONF=|n1/2-[750] (2005Ah09) E(level): ν1/2-[750]. Jπ(level): Assignment is from (d,p) (1990Ah02). | |
648.94 | (9/2+) | E(level): ν5/2+[622]. | |
683 | (9/2+) | CONF=|n9/2+[615] (2005Ah09) Jπ(level): Assignment is from (d,p) (1990Ah02). | |
691 | 11/2- | Jπ(level): Assignment is from (d,p) (1990Ah02). | |
E(level) | Jπ(level) | T1/2(level) | Comments |
708.05 | 5/2- | E(level): ν1/2-[750]. Jπ(level): Assignment is from (d,p) (1990Ah02). | |
720.50 | (11/2+) | E(level): ν5/2+[622]. | |
758 | (11/2+) | Jπ(level): Assignment is from (d,p) (1990Ah02). | |
981.51 | (3/2-) | CONF=|[|n7/2+[613]~#2{+-}|]3/2- (2005Ah09) E(level): |[ν7/2+[613]~#2-|]3/2-. | |
1009.13 | (5/2-) | E(level): |[ν7/2+[613]~#2-|]3/2-. | |
1043.77 | (7/2-) | E(level): |[ν7/2+[613]~#2-|]3/2-. | |
1094.57 | (9/2-) | E(level): |[ν7/2+[613]~#2-|]3/2-. | |
1155.80 | (11/2-) | E(level): |[ν7/2+[613]~#2-|]3/2-. | |
1183 | (7/2-) | E(level): 3/2-[752]. Jπ(level): Assignment is from (d,p) (1990Ah02). | |
1250 | (1/2-) | E(level): ν1/2-[761]. Jπ(level): Assignment is from (d,p) (1990Ah02). | |
1262 | (5/2-) | E(level): ν1/2-[761]. Jπ(level): Assignment is from (d,p) (1990Ah02). | |
1304 | (11/2-) | E(level): 3/2-[752]. Jπ(level): Assignment is from (d,p) (1990Ah02). | |
1326 | (9/2-) | E(level): ν1/2-[761]. Jπ(level): Assignment is from (d,p) (1990Ah02). | |
1335 | (3/2-) | E(level): ν1/2-[761]. Jπ(level): Assignment is from (d,p) (1990Ah02). |
Measured α(θ): 2011Gu11, 2005Se08.
Levels: The level scheme and band assignments are from 255Fm α-decay (2005Ah09,1971Ah01,1975Ah01) and from 250Cf(d,p) (1990Ah02). For a discussion of single-particle Nilsson states above n=152, see 1990Ah02.
Gammas: All γ data are from 255Fm α decay, except where noted.
Q-value: S(2n)=11730 4, S(2p)=11194 4 (2021Wa16)