ADOPTED LEVELS, GAMMAS for 250Cf
Author: Y. Akovali | Citation: Nucl. Data Sheets 94,131 (2001) | Cutoff date: 1-Aug-2001
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-2.06×103 keV SY | S(n)= 6625.3 keV 17 | S(p)= 5967.6 keV 22 | Q(α)= 6128.44 keV 19 | ||
Reference: 2012WA38 |
References: | |||
A | 254Fm α decay | B | 250Bk β- decay |
C | 250Es ε decay (2.22 H) | D | 250Es ε decay (8.6 H) |
E | 250Cf(d,d’) | F | 249Cf(d,p) |
G | 249Bk(α,t) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | ABCDE G | 0+ | 13.08 y 9 % α = 99.923 3 % SF = 0.077 3 | |||||
42.721 5 | ABCDE G | 2+ | 96 ps 10 | 42.721 5 | | E2 | 0.0 | 0+ |
141.875 10 | ABCDE G | 4+ | 99.160 10 | | E2 | 42.721 | 2+ | |
296.22 6 | A DE G | 6+ | 154.35 6 | | E2 | 141.875 | 4+ | |
≈500 | G | 8+ | ||||||
871.57 3 | BCD G | 2- | 828.81 3 | | E1 | 42.721 | 2+ | |
905.89 2 | B DE G | 3- | 34.325 5 764.2 1 863.2 1 | 1.3 2 78 4 100 6 | M1+E2 E1 E1 | 871.57 141.875 42.721 | 2- 4+ 2+ | |
951.98 2 | B D G | 4- | 46.093 5 80.412 10 810.2 1 | 2.1 3 3.2 4 100 6 | M1+E2 E2 E1 | 905.89 871.57 141.875 | 3- 2- 4+ | |
1008.51 2 | DE G | 5- | 56.527 13 102.623 10 712.3 1 866.7 1 | 6.7 8 15.7 23 100 7 97 8 | M1+E2 E2 [E1] [E1] | 951.98 905.89 296.22 141.875 | 4- 3- 6+ 4+ | |
1031.852 21 | BC E | 2+ | 0.94 ps 10 | 126.01 3 160.26 4 889.956 22 989.125 21 1031.852 21 | 0.0140 12 0.063 4 3.40 5 100 79.1 12 | [E1] [E1] [E2] E2 E2 | 905.89 871.57 141.875 42.721 0.0 | 3- 2- 4+ 2+ 0+ |
≈1070 | G | (6-) | ||||||
1071.37 2 | BCD | 3+ | 119.4 3 165.44 15 199.72 20 929.468 22 1028.654 25 | 0.014 5 0.028 4 0.022 3 25.1 4 100 3 | [E1] [E1] [E1] [E2] (E2) | 951.98 905.89 871.57 141.875 42.721 | 4- 3- 2- 4+ 2+ | |
1123 1 | E | (4+) | ||||||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1154.24 10 | BC | 0+ | 1111.50 10 1154.3 2 | 100 | [E2] E0 | 42.721 0.0 | 2+ 0+ | |
1175.52 3 | BC E | 1- | 303.95 20 1132.80 3 1175.5 2 | 11.9 14 100 6 200 20 | [M1,E2] [E1] E1 | 871.57 42.721 0.0 | 2- 2+ 0+ | |
1189.39 3 | BC | 2+ | 1047.51 6 1146.67 3 | 18.0 13 100 5 | [E2] E0+E2 | 141.875 42.721 | 4+ 2+ | |
1209.97 4 | BC F | (2)- | 1167.25 4 | | E1 | 42.721 | 2+ | |
1211 1 | B E G | (3-) | 1068.27 17 ? 1167.25 4 ? | | 141.875 42.721 | 4+ 2+ | ||
≈1218.2? | B | ≈1175.5? | | 42.721 | 2+ | |||
1244.50 8 | BC | 2+ | 1103.0 3 1201.79 4 1244.42 8 | 7.2 24 100 6 25 3 | [E2] [M1,E2] [E2] | 141.875 42.721 0.0 | 4+ 2+ 0+ | |
1247 2 | E | (3-) | ||||||
1255.39 4 | D FG | 4- | 184.2 2 246.92 6 303.41 3 349.4 1 383.7 1 | 2.1 4 17.0 9 100 5 91 5 63 4 | [E1] M1+E2 M1+E2 E2+M1 E2 | 1071.37 1008.51 951.98 905.89 871.57 | 3+ 5- 4- 3- 2- | |
1266.6 2 | BC | 0+ | 1223.8 2 1266.6 2 | | [E2] E0 | 42.721 0.0 | 2+ 0+ | |
1272 2 | E | |||||||
1296.60 4 | BC E | 2+ | 1154.77 3 1253.82 7 1296.54 13 | 100 5 23.3 19 9.4 13 | [E2] E0+E2 [E2] | 141.875 42.721 0.0 | 4+ 2+ 0+ | |
1311.00 4 | D F | 5- | 55.602 5 | | M1+E2 | 1255.39 | 4- | |
1313 2 | E | (5-) | ||||||
1335 2 | E | (3-) | ||||||
1377.76 4 | D FG | 6- | 66.759 10 | | M1(+E2) | 1311.00 | 5- | |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1385.50 10 | B | 1,2+ | 1342.87 8 1385.42 6 | 93 7 100 7 | 42.721 0.0 | 2+ 0+ | ||
1396.09 7 | D FG | (5)- | 85.086 7 140.694 10 | 22.8 20 100 7 | M1(+E2) M1(+E2) | 1311.00 1255.39 | 5- 4- | |
1411.33 6 | B | (1,2+) | 1368.61 6 1411.6 4 ? | 100 8 19 5 | 42.721 0.0 | 2+ 0+ | ||
1426.86 12 | B E | (3-) | 555.22 10 ? | | 871.57 | 2- | ||
1457.76 4 | D FG | (6)- | 61.667 5 80.00 3 146.9 1 | 100 9 13 4 26 8 | M1+E2 M1(+E2) M1(+E2) | 1396.09 1377.76 1311.00 | (5)- 6- 5- | |
1478.37 4 | D FG | (5)- | 82.282 6 222.993 20 | 100 8 71 5 | M1(+E2) M1+E2 | 1396.09 1255.39 | (5)- 4- | |
1499.53 4 | D F | (6)- | 41.775 5 103.440 10 | 41 4 100 9 | M1(+E2) M1(+E2) | 1457.76 1396.09 | (6)- (5)- | |
≈1530 | FG | (7-) | ||||||
1541 2 | E | (5-) | ||||||
≈1550 | FG | (6-) | ||||||
1570 2 | E | |||||||
≈1575 | F | (7-) | ||||||
≈1600 | F | (6-) | ||||||
1626 3 | E | |||||||
1658.00 4 | BC | 2+ | 586.43 7 626.11 4 786.26 14 1516.22 7 1615.29 4 1658.00 4 | 14 2 54 6 11 2 2.6 2 100 5 59 3 | M1(+E2) M1(+E2) [E1] [E2] E2 E2 | 1071.37 1031.852 871.57 141.875 42.721 0.0 | 3+ 2+ 2- 4+ 2+ 0+ | |
1695.15 10 | B | (3+) | 1553.37 18 1652.40 10 | 55 14 100 9 | 141.875 42.721 | 4+ 2+ | ||
1735 2 | E | |||||||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1915 3 | E | |||||||
2015 3 | E |
I(γ): Relative intensities deexciting each level, adopted from 250Bk β- and 250Es ε decays.
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - K=0+ GS band. | |||||||
0.0 | 0+ | 13.08 y 9 % α = 99.923 3 % SF = 0.077 3 | |||||
42.721 5 | 2+ | 96 ps 10 | 42.721 5 | | E2 | 0.0 | 0+ |
141.875 10 | 4+ | 99.160 10 | | E2 | 42.721 | 2+ | |
296.22 6 | 6+ | 154.35 6 | | E2 | 141.875 | 4+ | |
≈500 | 8+ | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 2 - K=2- OCTUPOLE-VIBRATIONAL band. | |||||||
871.57 3 | 2- | ||||||
905.89 2 | 3- | 34.325 5 764.2 1 863.2 1 | 1.3 2 78 4 100 6 | M1+E2 E1 E1 | 871.57 141.875 42.721 | 2- 4+ 2+ | |
951.98 2 | 4- | 46.093 5 80.412 10 810.2 1 | 2.1 3 3.2 4 100 6 | M1+E2 E2 E1 | 905.89 871.57 141.875 | 3- 2- 4+ | |
1008.51 2 | 5- | 56.527 13 102.623 10 712.3 1 866.7 1 | 6.7 8 15.7 23 100 7 97 8 | M1+E2 E2 [E1] [E1] | 951.98 905.89 296.22 141.875 | 4- 3- 6+ 4+ | |
≈1070 | (6-) | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 3 - K=2+ GAMMA-VIBRATIONAL band. | |||||||
1031.852 21 | 2+ | 0.94 ps 10 | |||||
1071.37 2 | 3+ | 119.4 3 165.44 15 199.72 20 929.468 22 1028.654 25 | 0.014 5 0.028 4 0.022 3 25.1 4 100 3 | [E1] [E1] [E1] [E2] (E2) | 951.98 905.89 871.57 141.875 42.721 | 4- 3- 2- 4+ 2+ | |
1123 1 | (4+) | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 4 - K=0+ band | |||||||
1154.24 10 | 0+ | ||||||
1189.39 3 | 2+ | 1047.51 6 1146.67 3 | 18.0 13 100 5 | [E2] E0+E2 | 141.875 42.721 | 4+ 2+ | |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 5 - K=1- OCTUPOLE-VIBRATIONAL band. | |||||||
1175.52 3 | 1- | ||||||
1211 1 | (3-) | 1068.27 17 ? 1167.25 4 ? | | 141.875 42.721 | 4+ 2+ | ||
1313 2 | (5-) | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 6 - K=2-? band | |||||||
1209.97 4 | (2)- | ||||||
1247 2 | (3-) | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 7 - K=4- band. | |||||||
1255.39 4 | 4- | ||||||
1311.00 4 | 5- | 55.602 5 | | M1+E2 | 1255.39 | 4- | |
1377.76 4 | 6- | 66.759 10 | | M1(+E2) | 1311.00 | 5- | |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 8 - K=0+ band | |||||||
1266.6 2 | 0+ | ||||||
1296.60 4 | 2+ | 1154.77 3 1253.82 7 1296.54 13 | 100 5 23.3 19 9.4 13 | [E2] E0+E2 [E2] | 141.875 42.721 0.0 | 4+ 2+ 0+ | |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 9 - K=5- band. | |||||||
1396.09 7 | (5)- | ||||||
1457.76 4 | (6)- | 61.667 5 80.00 3 146.9 1 | 100 9 13 4 26 8 | M1+E2 M1(+E2) M1(+E2) | 1396.09 1377.76 1311.00 | (5)- 6- 5- | |
≈1530 | (7-) | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 10 - K=5- (n 9/2[734],n 1/2[620]) band. | |||||||
1478.37 4 | (5)- | ||||||
≈1550 | (6-) | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 11 - K=6- (n 9/2[734],n 3/2[622]) band | |||||||
1499.53 4 | (6)- | ||||||
≈1575 | (7-) | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 12 - K=3? | |||||||
1426.86 12 | (3-) | ||||||
1541 2 | (5-) | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 13 - K=2+ BAND? | |||||||
1658.00 4 | 2+ | ||||||
1695.15 10 | (3+) | 1553.37 18 1652.40 10 | 55 14 100 9 | 141.875 42.721 | 4+ 2+ |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
42.721 | 2+ | 96 ps 10 | 42.721 5 | E2 | 1293 | B(E2)(W.u.)=3.4×102 4, α=1293 | |
141.875 | 4+ | 99.160 10 | E2 | 23.8 | α=23.8 | ||
296.22 | 6+ | 154.35 6 | E2 | 3.33 | α=3.33 | ||
871.57 | 2- | 828.81 3 | E1 | 0.00657 | α=0.00657 | ||
905.89 | 3- | 34.325 5 | M1+E2 | 0.42 5 | 7.4×102 | α=7.4×102 11 | |
3- | 764.2 1 | E1 | 0.00758 | α=0.00758 | |||
3- | 863.2 1 | E1 | 0.00613 | α=0.00613 | |||
951.98 | 4- | 46.093 5 | M1+E2 | 0.40 2 | 200 | α=200 10 | |
4- | 80.412 10 | E2 | 63.3 | α=63.3 | |||
4- | 810.2 1 | E1 | 0.00684 | α=0.00684 | |||
1008.51 | 5- | 56.527 13 | M1+E2 | 0.37 +20-10 | 80 | α=80 40 | |
5- | 102.623 10 | E2 | 20.28 | α=20.28 | |||
5- | 712.3 1 | [E1] | 0.00859 | α=0.00859 | |||
5- | 866.7 1 | [E1] | 0.00608 | α=0.00608 | |||
1031.852 | 2+ | 0.94 ps 10 | 126.01 3 | [E1] | 0.0834 | B(E1)(W.u.)=6.8E-6 10, α=0.0834 | |
2+ | 0.94 ps 10 | 160.26 4 | [E1] | 0.1859 | B(E1)(W.u.)=1.50E-5 19, α=0.1859 | ||
2+ | 0.94 ps 10 | 889.956 22 | [E2] | 0.01961 | B(E2)(W.u.)=0.211 23, α=0.01961 | ||
2+ | 0.94 ps 10 | 989.125 21 | E2 | 0.01603 | B(E2)(W.u.)=3.7 4, α=0.01603 | ||
2+ | 0.94 ps 10 | 1031.852 21 | E2 | 0.01480 | B(E2)(W.u.)=2.3 3, α=0.01480 | ||
1071.37 | 3+ | 119.4 3 | [E1] | 0.0956 | α=0.0956 | ||
3+ | 165.44 15 | [E1] | 0.1726 | α=0.1726 | |||
3+ | 199.72 20 | [E1] | 0.1127 | α=0.1127 | |||
3+ | 929.468 22 | [E2] | 0.0180 | α=0.0180 | |||
3+ | 1028.654 25 | (E2) | 0.0148 | α=0.0148 9 | |||
1154.24 | 0+ | 1111.50 10 | [E2] | 0.0129 | α=0.0129 | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
1175.52 | 1- | 303.95 20 | [M1,E2] | 1.0 | α=1.0 8 | ||
1- | 1132.80 3 | [E1] | 0.00385 | α=0.00385 | |||
1- | 1175.5 2 | E1 | 0.00362 | α=0.00362 | |||
1189.39 | 2+ | 1047.51 6 | [E2] | 0.0144 | α=0.0144 | ||
2+ | 1146.67 3 | E0+E2 | 0.10 | α=0.10 3 | |||
1209.97 | (2)- | 1167.25 4 | E1 | 0.00366 | α=0.00366 | ||
1244.50 | 2+ | 1103.0 3 | [E2] | 0.01306 | α=0.01306 | ||
2+ | 1201.79 4 | [M1,E2] | 0.027 | α=0.027 16 | |||
2+ | 1244.42 8 | [E2] | 0.01045 | α=0.01045 | |||
1255.39 | 4- | 184.2 2 | [E1] | 0.1352 | α=0.1352 | ||
4- | 246.92 6 | M1+E2 | 1.00 6 | 1.86 | α=1.86 9 | ||
4- | 303.41 3 | M1+E2 | 0.92 7 | 1.09 | α=1.09 10 | ||
4- | 349.4 1 | E2+M1 | 4.6 5 | 0.223 | α=0.223 12 | ||
4- | 383.7 1 | E2 | 0.135 | α=0.135 | |||
1266.6 | 0+ | 1223.8 2 | [E2] | 0.0108 | α=0.0108 | ||
1296.60 | 2+ | 1154.77 3 | [E2] | 0.0120 | α=0.0120 | ||
2+ | 1296.54 13 | [E2] | 0.00969 | α=0.00969 | |||
1311.00 | 5- | 55.602 5 | M1+E2 | 0.59 5 | 133 | α=133 9 | |
1377.76 | 6- | 66.759 10 | M1(+E2) | 0.5 LE | 37 | α=37 7 | |
1396.09 | (5)- | 85.086 7 | M1(+E2) | 0.27 LE | 15.4 | α=15.4 16 | |
(5)- | 140.694 10 | M1(+E2) | 0.1 LT | 15.6 | α=15.6 | ||
1457.76 | (6)- | 61.667 5 | M1+E2 | 0.20 3 | 45.1 | α=45.1 16 | |
(6)- | 80.00 3 | M1(+E2) | 0.3 LT | 18.7 | α=18.7 11 | ||
(6)- | 146.9 1 | M1(+E2) | 0.6 LT | 13.0 | α=13.0 18 | ||
1478.37 | (5)- | 82.282 6 | M1(+E2) | 0.06 LT | 16.33 | α=16.33 11 | |
(5)- | 222.993 20 | M1+E2 | 0.42 7 | 3.71 | α=3.71 15 | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
1499.53 | (6)- | 41.775 5 | M1(+E2) | 0.14 +7-14 | 144 | α=144 30 | |
(6)- | 103.440 10 | M1(+E2) | 0.25 +15-10 | 9.1 | α=9.1 9 | ||
1658.00 | 2+ | 586.43 7 | M1(+E2) | 0.24 | α=0.24 1 | ||
2+ | 626.11 4 | M1(+E2) | 0.24 | α=0.24 1 | |||
2+ | 786.26 14 | [E1] | 0.00721 | α=0.00721 | |||
2+ | 1516.22 7 | [E2] | 0.00727 | α=0.00727 | |||
2+ | 1615.29 4 | E2 | 0.00498 | α=0.00498 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 0+ | 13.08 y 9 % α = 99.923 3 % SF = 0.077 3 | Branchings are from unweighted average of the measured α/SF=1330 45 (1963Ph01), 1260 40 (1965Me02). E(level): Branchings are from unweighted average of the measured α/SF=1330 45 (1963Ph01), 1260 40 (1965Me02). K=0+ GS band. |
42.721 | 2+ | 96 ps 10 | E(level): K=0+ GS band. |
141.875 | 4+ | E(level): K=0+ GS band. | |
296.22 | 6+ | E(level): K=0+ GS band. | |
500 | 8+ | E(level): K=0+ GS band. | |
871.57 | 2- | E(level): K=2- OCTUPOLE-VIBRATIONAL band. | |
905.89 | 3- | B(E3)=20.2 20 E(level): K=2- OCTUPOLE-VIBRATIONAL band. | |
951.98 | 4- | E(level): K=2- OCTUPOLE-VIBRATIONAL band. | |
1008.51 | 5- | E(level): K=2- OCTUPOLE-VIBRATIONAL band. | |
1031.852 | 2+ | 0.94 ps 10 | E(level): K=2+ GAMMA-VIBRATIONAL band. |
1070 | (6-) | E(level): K=2- OCTUPOLE-VIBRATIONAL band. | |
1071.37 | 3+ | E(level): K=2+ GAMMA-VIBRATIONAL band. | |
1123 | (4+) | E(level): K=2+ GAMMA-VIBRATIONAL band. | |
1154.24 | 0+ | E(level): K=0+ band. | |
1175.52 | 1- | E(level): K=1- OCTUPOLE-VIBRATIONAL band. | |
1189.39 | 2+ | E(level): K=0+ band. | |
1209.97 | (2)- | Almost pure 2-,(n 9/2[734]-n 5/2[622]) configuration was suggested in 1980Ah01. The ε decay transition from the 1-,(n 7/2[633]-n 9/2[734]) 250Es parent could Be via the p 7/2[633] to p 5/2[622] transition. The n 5/2[622] state is a hole state, close to the 9/2[734] state; some admixture of 1-,(n 9/2[734]-n 5/2[622]) configuration in 2.22H 250Es can explain this ε transition. E(level): Almost pure 2-,(n 9/2[734]-n 5/2[622]) configuration was suggested in 1980Ah01. The ε decay transition from the 1-,(n 7/2[633]-n 9/2[734]) 250Es parent could Be via the p 7/2[633] to p 5/2[622] transition. The n 5/2[622] state is a hole state, close to the 9/2[734] state; some admixture of 1-,(n 9/2[734]-n 5/2[622]) configuration in 2.22H 250Es can explain this ε transition. K=2-? band. | |
1211 | (3-) | B(E3)=19.3 19 The level observed in (α,t) is assumed to populate a two-proton component of this collective state. E(level): The level observed in (α,t) is assumed to populate a two-proton component of this collective state. K=1- OCTUPOLE-VIBRATIONAL band. | |
1247 | (3-) | E(level): K=2-? band. | |
1255.39 | 4- | E(level): K=4- band. | |
1266.6 | 0+ | E(level): K=0+ band. | |
1296.60 | 2+ | E(level): K=0+ band. | |
1311.00 | 5- | E(level): K=4- band. | |
1313 | (5-) | E(level): K=1- OCTUPOLE-VIBRATIONAL band. | |
1377.76 | 6- | E(level): K=4- band. | |
E(level) | Jπ(level) | T1/2(level) | Comments |
1396.09 | (5)- | E(level): K=5- band. | |
1426.86 | (3-) | B(E3)=13.3 13 E(level): K=3?. | |
1457.76 | (6)- | E(level): K=5- band. | |
1478.37 | (5)- | E(level): K=5- (n 9/2[734],n 1/2[620]) band. | |
1499.53 | (6)- | E(level): K=6- (n 9/2[734],n 3/2[622]) band. | |
1530 | (7-) | E(level): K=5- band. | |
1541 | (5-) | E(level): K=3?. | |
1550 | (6-) | E(level): K=5- (n 9/2[734],n 1/2[620]) band. | |
1575 | (7-) | E(level): K=6- (n 9/2[734],n 3/2[622]) band. | |
1600 | (6-) | K=6, two-neutron state was assigned by 1976Ya02. E(level): K=6, two-neutron state was assigned by 1976Ya02. | |
1658.00 | 2+ | E(level): K=2+ BAND?. | |
1695.15 | (3+) | E(level): K=2+ BAND?. |
E(level) | E(gamma) | Comments |
1209.97 | 1167.25 | E(γ): Multiply placed |
1211 | 1167.25 | E(γ): Multiply placed |
Theoretical studies:
1998Co23 calculated level energies of K=2+ γ-band, K=0-, K=1- and K=2- octupole-vibrational band; and B(E3; 0+ to 3-) strengths. The interacting boson approximation was utilized. See also 1990Co26 for analysis of level structure and octupole state fragmentation dependence on β(2) deformation.
See 1992So22 for the calculated B(E3) octupole strengths and energies of K,Jπ=0,3- and 1,3- states.
Energies, B(EL) values and structures were calculated by 1991So15 for low-energy nonrotational states in the framework of a quasiparticle-phonon model. See also earlier calculations in 1976Iv04 and 1973Iv01, 1971Ko31, 1970Ne08, 1969Pa08, 1965So04.
Ground-state deformations were calculated by 1995Mo29 based on the finite-range droplet macroscopic model and the folded YUKAWA single-particle microscopic model. Their calculations yielded β(2)=0.245, β(4)=0.026, β(6)=-0.038.
The equilibrium deformations and the static electric moment were calculated by 1983Bo15 with use of dynamic model.
The quadrupole moment for various proton and neutron states were calculated by 1992Bh04 by using WOODS-Saxon and Nilsson models. The fermion dynamical symmetry and pseudo su(3) models were used also to calculate the B(E2; 0+ to 2+) values, and comparisons were made.
The static electric quadrupole and hexadecapole moments were calculated by 1978Ne13 by using Strunsky shell-correction method.
Properties of the γ-vibrational state was studied and B(E2) value was calculated by 1965Be40.
Systematics of E(first 2+ levels) and B(E2; 0+ to 2+) were studied by 1993Sa05 as a function of n(n)n(p), products of valence proton and neutron numbers.
From a correlation plot of known B(E2; 2+ to 0+)’s with n(n)n(p), the products of valence proton and neutron numbers, 1995Za10 deduced a range for the hexadecapole deformation for 250Cf as β(4)≈-0.05 to -0.10.
The average neutron and proton pairing gaps were calculated by 1988Ma04.
The energies of the ground-state band were calculated by 1988Ri07 by using the interacting boson model, and by 1978To13 by using the collective HAMILTONIAN with β-vibration plus rotation.
For calculation of partial α half-life, see, for example, 1997Mo25, 1979Po23, 1976Ra02.
Potential energy surface and shape of the fissioning nucleus were calculated by 1996Py02. Analysis were made by considering heavy-ion clustering. See 1976Iw02, 1971Sc03 also for calculations of potential energy surface for fission.
For calculations and systematics of T1/2(SF), see, 1992Bh03, 1989St20, 1988Io03, 1978Po09.
For calculated fission barriers, see 1992Bh03, 1987Gu03, 1984Ku05, 1980Ku14, 1977Pr10, 1973Ba19, 1972Ma11.
Average total kinetic energy of fission fragments was calculated by 1995Ef04.
Yield for 40S in spontaneous fission relative to yield for α decay was calculated by 1993Gr15.
Partial half-life for decay by pion emission was calculated by 1988Io02.
Emission probabilities for decay by heavy-ion were calculated by 1980Sa36.
Q-value: Note: Current evaluation has used the following Q record -2100 syst 6624.6 23 5966.2 27 6128.4419 1995Au04