ADOPTED LEVELS, GAMMAS for 226Ra
Author: Y. A. Akovali | Citation: Nucl. Data Sheets 77,433 (1996) | Cutoff date: 1-Feb-1996
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-641 keV 4 | S(n)= 6396 keV 3 | S(p)= 7440 keV 13 | Q(α)= 4870.62 keV 25 | ||
Reference: 2012WA38 |
References: | |||
A | 226Fr β- decay | B | 226Ac ε decay |
C | 230Th α decay | D | Coulomb Excitation |
E | 226Ra(d,d’) | F | 230Th(d,6Li) |
G | (HI,xnγ) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | ABCDEFG | 0+ | 1600 y 7 % α = 100 % 14C = 3.2×10-9 16 | |||||
67.67 1 | ABCDEFG | 2+ | 0.63 ns 2 | 67.67 1 | 100 | E2 | 0.0 | 0+ |
211.54 2 | A CDEFG | 4+ | ≈ 0.17 ns | 143.87 1 | 100 | E2 | 67.67 | 2+ |
253.73 1 | ABCDEFG | 1- | 186.05 1 253.73 1 | 73 4 100 7 | E1 E1 | 67.67 0.0 | 2+ 0+ | |
321.54 6 | A CDEFG | 3- | 67.81 20 110.00 5 253.9 1 | 10 3 100 11 | 253.73 211.54 67.67 | 1- 4+ 2+ | ||
416.5 3 | CDEFG | 6+ | 204.9 3 | 100 | 211.54 | 4+ | ||
446.3 2 | A CDEFG | 5- | 124.8 2 234.8 2 | 3.3 11 100 | 321.54 211.54 | 3- 4+ | ||
626.7 2 | D G | 7- | 180.4 2 210.3 2 | 8.5 10 100 | 446.3 416.5 | 5- 6+ | ||
650 | D F | (0+) | 396 | | 253.73 | 1- | ||
669.4 3 | D G | 8+ | 252.8 2 | 100 | 416.5 | 6+ | ||
824.6 1 | A C F | 0+ | 570.9 1 | 100 | 253.73 | 1- | ||
857.6 3 | D G | 9- | 188.2 2 231.0 2 | 100 54 5 | 669.4 626.7 | 8+ 7- | ||
873.7 1 | A C F | 2+ | 552.2 1 620.0 1 | 91 7 100 10 | 321.54 253.73 | 3- 1- | ||
959.9 3 | D G | 10+ | 290.6 2 | 100 | 669.4 | 8+ | ||
1048.8 1 | A F | 1- | 795.1 1 980.6 5 1048.1 5 | 32 3 100 10 79 9 | 253.73 67.67 0.0 | 1- 2+ 0+ | ||
1070.5 2 | A | (2-) | 816.9 2 1002.2 5 | 14.7 14 100 10 | 253.73 67.67 | 1- 2+ | ||
1077.2 2 | A | 1-,2 | 755.8 2 823.5 3 1009.0 5 | 9.5 10 7.8 8 100 10 | 321.54 253.73 67.67 | 3- 1- 2+ | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1107 3 | E | 2+,3- | ||||||
1122.4 3 | A E | (2+) | 910.9 2 | 100 | 211.54 | 4+ | ||
1133.1 3 | D G | 11- | 173.2 2 275.5 2 | 70 7 100 | 959.9 857.6 | 10+ 9- | ||
1140 | F | |||||||
1156.2 1 | A E | 2+ | 834.7 1 902.6 3 944.6 3 1087.9 5 1155.8 5 | 56 4 16.0 12 100 10 42 4 60 6 | 321.54 253.73 211.54 67.67 0.0 | 3- 1- 4+ 2+ 0+ | ||
1220 | F | |||||||
1238.9 5 | A | (2) | 917.3 5 1171.7 10 | 50 10 100 15 | 321.54 67.67 | 3- 2+ | ||
1280.5 4 | D G | 12+ | 320.6 2 | | 959.9 | 10+ | ||
1330 | F | |||||||
1390.0 1 | A E | 2+ | 516.30 5 565.4 1 1322.5 5 1390.7 10 | 10.4 8 8.2 8 100 9 57 6 | 873.7 824.6 67.67 0.0 | 2+ 0+ 2+ 0+ | ||
1420 | F | |||||||
1422.5 10 | A | 0,1,2 | 1168.8 10 | 100 | 253.73 | 1- | ||
1437.8 7 | A | 1-,2 | 1117.0 10 1183.5 8 | 100 25 86 9 | 321.54 253.73 | 3- 1- | ||
1446 | D | 13- | 166 313 | | 1280.5 1133.1 | 12+ 11- | ||
1540 | F | |||||||
1587.3 5 | A | 1,2+ | 1333.6 5 1587.0 15 | 100 19 15 4 | 253.73 0.0 | 1- 0+ | ||
1621.3 5 | A | 1-,2+ | 1299.6 5 1368.3 10 1554.4 15 1620.9 15 | 100 14 53 14 25 6 29 4 | 321.54 253.73 67.67 0.0 | 3- 1- 2+ 0+ | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1625 | D | 14+ | 179 345 | | 1446 1280.5 | 13- 12+ | ||
1723.4 3 | A E | 2+ | 646.2 3 1471.1 10 1655.0 10 1722.1 15 | 13 3 100 16 53 7 26 4 | 1077.2 253.73 67.67 0.0 | 1-,2 1- 2+ 0+ | ||
1738.5 10 | A | 1,2+ | 1486.2 15 1670.4 10 1738.3 10 | 18 3 52 7 100 10 | 253.73 67.67 0.0 | 1- 2+ 0+ | ||
1756.2 10 | A | 1,2+ | 1503.2 10 1755.4 10 | 29 4 100 15 | 253.73 0.0 | 1- 0+ | ||
1767.1 10 | A | 0,1,2 | 1513.4 10 | | 253.73 | 1- | ||
1778.4 10 | A | 0,1,2 | 1524.7 10 | | 253.73 | 1- | ||
1786.1 10 | A | 1-,2+ | 1465.2 15 1532.4 10 1785.2 15 | 64 14 100 19 17 4 | 321.54 253.73 0.0 | 3- 1- 0+ | ||
1793 | D | 15- | 168 347 | | 1625 1446 | 14+ 13- | ||
1865.0 10 | A | 1,2+ | 991.4 8 1610.7 10 1797.2 15 1865.5 10 | 23 4 100 11 26 4 58 6 | 873.7 253.73 67.67 0.0 | 2+ 1- 2+ 0+ | ||
1882.3 7 | A | 0,1,2 | 444.50 5 | | 1437.8 | 1-,2 | ||
1888.4 15 | A | 0,1,2 | 1634.7 15 | | 253.73 | 1- | ||
1897.4 10 | A | 1-,2+ | 1576.0 10 1685.2 15 1897.8 15 | 100 29 57 12 72 15 | 321.54 211.54 0.0 | 3- 4+ 0+ | ||
1907.8 10 | A | 1,2+ | 1083.6 8 1839.6 10 1907.4 15 | 63 12 100 10 44 9 | 824.6 67.67 0.0 | 0+ 2+ 0+ | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1945.6 10 | A | 1,2+ | 1692.6 10 1944.0 15 | 100 12 14 4 | 253.73 0.0 | 1- 0+ | ||
1951.0 10 | A | 1-,2+ | 1628.2 15 1697.3 10 1883.9 10 1951.1 15 | 24 4 82 12 100 12 31 1 | 321.54 253.73 67.67 0.0 | 3- 1- 2+ 0+ | ||
1970.8 5 | A | 1-,2+ | 848.3 5 1648.9 15 1716.8 10 1903.4 10 1971.1 10 | 13.4 20 16.1 22 78 8 100 10 32 5 | 1122.4 321.54 253.73 67.67 0.0 | (2+) 3- 1- 2+ 0+ | ||
1982.7 10 | A | 0+,1 | 1109.7 10 1728.4 10 1914.8 15 | 36 8 100 10 38 6 | 873.7 253.73 67.67 | 2+ 1- 2+ | ||
1993 | D | 16+ | 200? 368 | | 1793 1625 | 15- 14+ | ||
2006.7 15 | A | 0,1,2 | 1753.0 15 | | 253.73 | 1- | ||
2015.2 15 | A | 0,1,2 | 1761.5 15 | | 253.73 | 1- | ||
2056.8 5 | A | 1,2+ | 1231.9 5 1990.3 10 2056.9 15 | 100 10 96 10 43 7 | 824.6 67.67 0.0 | 0+ 2+ 0+ | ||
2086.1 10 | A | 1,2+ | 2017.6 10 2087.8 15 | 100 17 18 5 | 67.67 0.0 | 2+ 0+ | ||
2170 | D | 17- | 177 377 | | 1993 1793 | 16+ 15- | ||
2182.3 15 | A | 0,1,2 | 1928.6 15 | | 253.73 | 1- | ||
2189.4 10 | A E | 2+ | 1365.0 10 2120.9 10 2190.9 15 | 75 30 100 14 31 5 | 824.6 67.67 0.0 | 0+ 2+ 0+ | ||
2269.7 10 | A | 1,2+ | 2014.4 15 2202.2 10 2272.0 20 | 60 12 100 11 27 9 | 253.73 67.67 0.0 | 1- 2+ 0+ | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
2382 | D | 18+ | 389 | | 1993 | 16+ |
Jπ(level): The Jπ assignments for all levels of the g.s. band and the K=0 octupole-vibrational band are from the Coulomb excitation, γ-decay pattern, and the (HI,xnγ) data. The arguments for the 2+ and the 1- states of these two bands are given explicitly. Assignments made from (d,d’) data are based on deuteron angular distributions and on measured cross sections.
E(γ): From 226Fr β- decay, 230Th α decay and (HI,xnγ), except where noted.
I(γ): Relative photon intensity deexciting each level, adopted from 226Fr β- decay, 230Th α decay and (HI,xnγ) data.
M(γ): From ce work in 230Th α decay and 226Ac ε decay.
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+ | 1600 y 7 % α = 100 % 14C = 3.2×10-9 16 | |||||
67.67 1 | 2+ | 0.63 ns 2 | 67.67 1 | 100 | E2 | 0.0 | 0+ |
211.54 2 | 4+ | ≈ 0.17 ns | 143.87 1 | 100 | E2 | 67.67 | 2+ |
416.5 3 | 6+ | 204.9 3 | 100 | 211.54 | 4+ | ||
669.4 3 | 8+ | 252.8 2 | 100 | 416.5 | 6+ | ||
959.9 3 | 10+ | 290.6 2 | 100 | 669.4 | 8+ | ||
1280.5 4 | 12+ | 320.6 2 | | 959.9 | 10+ | ||
1625 | 14+ | 179 345 | | 1446 1280.5 | 13- 12+ | ||
1993 | 16+ | 200? 368 | | 1793 1625 | 15- 14+ | ||
2382 | 18+ | 389 | | 1993 | 16+ | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 2 - K=0 octupole VIBRATIONAL band. | |||||||
253.73 1 | 1- | ||||||
321.54 6 | 3- | 67.81 20 110.00 5 253.9 1 | 10 3 100 11 | 253.73 211.54 67.67 | 1- 4+ 2+ | ||
446.3 2 | 5- | 124.8 2 234.8 2 | 3.3 11 100 | 321.54 211.54 | 3- 4+ | ||
626.7 2 | 7- | 180.4 2 210.3 2 | 8.5 10 100 | 446.3 416.5 | 5- 6+ | ||
857.6 3 | 9- | 188.2 2 231.0 2 | 100 54 5 | 669.4 626.7 | 8+ 7- | ||
1133.1 3 | 11- | 173.2 2 275.5 2 | 70 7 100 | 959.9 857.6 | 10+ 9- | ||
1446 | 13- | 166 313 | | 1280.5 1133.1 | 12+ 11- | ||
1793 | 15- | 168 347 | | 1625 1446 | 14+ 13- | ||
2170 | 17- | 177 377 | | 1993 1793 | 16+ 15- | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 3 - K=0 band. | |||||||
824.6 1 | 0+ | ||||||
873.7 1 | 2+ | 552.2 1 620.0 1 | 91 7 100 10 | 321.54 253.73 | 3- 1- | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 4 - K=1 band. | |||||||
1048.8 1 | 1- | ||||||
1070.5 2 | (2-) | 816.9 2 1002.2 5 | 14.7 14 100 10 | 253.73 67.67 | 1- 2+ |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
67.67 | 2+ | 0.63 ns 2 | 67.67 1 | E2 | 61.9 | B(E2)(W.u.)=123 5, α=61.9 |
211.54 | 4+ | ≈ 0.17 ns | 143.87 1 | E2 | 2.11 | B(E2)(W.u.)≈212, α=2.11 |
253.73 | 1- | 186.05 1 | E1 | 0.108 | α=0.108 | |
1- | 253.73 1 | E1 | 0.0520 | α=0.0520 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 0+ | 1600 y 7 % α = 100 % 14C = 3.2×10-9 16 | %14C/%α=3.2×10-11 16 (1985Ho21). Other measurement: %14C/%α|<1×10-10 (1985Al28). E(level): %14C/%α=3.2×10-11 16 (1985Ho21). Other measurement: %14C/%α|<1×10-10 (1985Al28). K=0 GS band. |
67.67 | 2+ | 0.63 ns 2 | E(level): K=0 GS band. |
211.54 | 4+ | ≈ 0.17 ns | E(level): K=0 GS band. |
253.73 | 1- | E(level): K=0 octupole VIBRATIONAL band. | |
321.54 | 3- | B(E3)=1.10 11 E(level): K=0 octupole VIBRATIONAL band. | |
416.5 | 6+ | E(level): K=0 GS band. | |
446.3 | 5- | E(level): K=0 octupole VIBRATIONAL band. | |
626.7 | 7- | E(level): K=0 octupole VIBRATIONAL band. | |
669.4 | 8+ | E(level): K=0 GS band. | |
824.6 | 0+ | E(level): K=0 band. | |
857.6 | 9- | E(level): K=0 octupole VIBRATIONAL band. | |
873.7 | 2+ | E(level): K=0 band. | |
959.9 | 10+ | E(level): K=0 GS band. | |
1048.8 | 1- | E(level): K=1 band. | |
1070.5 | (2-) | E(level): K=1 band. | |
1133.1 | 11- | E(level): K=0 octupole VIBRATIONAL band. | |
1140 | Jπ(level): From Jπ=L-1, deduced in (d,6Li). | ||
1238.9 | (2) | Gammas to 2+, 3- states and β- decay from 1- 226Fr are consistent with Jπ=1-,2. The Alaga rule and absence of a γ to the g.s. imply J=2. E(level): Gammas to 2+, 3- states and β- decay from 1- 226Fr are consistent with Jπ=1-,2. The Alaga rule and absence of a γ to the g.s. imply J=2. | |
1280.5 | 12+ | E(level): K=0 GS band. | |
1420 | This level might be the same level observed in 226Fr β- decay at 1422.5. E(level): This level might be the same level observed in 226Fr β- decay at 1422.5. Jπ(level): From Jπ=L-1, deduced in (d,6Li). | ||
1437.8 | 1-,2 | Gammas to 1-, 3- states and the log ft of 8.2 from 1- 226Fr suggest Jπ=1- or 2. E(level): Gammas to 1-, 3- states and the log ft of 8.2 from 1- 226Fr suggest Jπ=1- or 2. | |
1446 | 13- | E(level): K=0 octupole VIBRATIONAL band. | |
1540 | Jπ(level): From Jπ=L-1, deduced in (d,6Li). | ||
1625 | 14+ | E(level): K=0 GS band. | |
1793 | 15- | E(level): K=0 octupole VIBRATIONAL band. | |
E(level) | Jπ(level) | T1/2(level) | Comments |
1993 | 16+ | E(level): K=0 GS band. | |
2006.7 | 0,1,2 | log ft=7.3 for the β- decay from 1- 226Fr parent. E(level): log ft=7.3 for the β- decay from 1- 226Fr parent. | |
2015.2 | 0,1,2 | log ft=7.5 for the β branch from 1- 226Fr parent. E(level): log ft=7.5 for the β branch from 1- 226Fr parent. | |
2170 | 17- | E(level): K=0 octupole VIBRATIONAL band. | |
2182.3 | 0,1,2 | log ft=7.5 for the β branch from 1- 226Fr parent. E(level): log ft=7.5 for the β branch from 1- 226Fr parent. | |
2382 | 18+ | E(level): K=0 GS band. |
E(level) | E(gamma) | Comments |
650 | 396 | E(γ): from Coulomb excitation. |
Energies and wave functions of Kπ=0-, 2+, 2-, 3- and second 0- octupole-vibrational states were calculated by 1975Iv03. See 1983Pi04 for calculations of Kπ=0-, 0+ octupole-vibrational state energies; see 1970Ne08 for calculated energies of Kπ=0-,1-,2- and 3- bands; and 1982Zi02 for calculated energies of Kπ=0- band. The energies of the rotational states of the 0+ and 0- bands were calculated by 1995Al06, 1995De13 and 1995Jo11 and compared with the experimental level energies.
For calculations of equilibrium deformation parameters see, for example, 1975Iv03, 1982Du16, 1982Le19, 1983Ro14 and 1984Na22.
For calculations of electric quadrupole and hexadecapole moments see, for example, 1975Iv03 and 1983Ro14.
Effects of the Coriolis and centrifugal forces for nuclei with stable octupole deformation were examined; B(E3; 0+ to 3-,K=0) value and effective moments of inertia for g.s. and Kπ=0- bands were calculated as a function of octupole deformation by 1983Ro15. See also 1970Ne08 for calculated B(E3; 0+ to 3-) and 1977Ba45 for calculated B(E3; 0+ to 3-), B(E1; 0+ to 1-) values for Kπ=0- band.
See 1995De13 for calculated branching ratios for E1, E2, E3 transitions and comparisons with the experimental values.
Partial T1/2 for heavy ion emission were calculated by 1984Po08, 1985Po11 and 1995Si05. See 1995Na13 for discussions on multiclustering.
Q-value: Note: Current evaluation has used the following Q record -640 3 6396 3 7479 104870.63 25 1995Au04