ADOPTED LEVELS, GAMMAS for 240U
Author: C. Morse | Citation: Nucl. Data Sheets 206, 359 (2025) | Cutoff date: 27-Sep-2024
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=399 keV 17 | S(n)= 5928 keV 3 | S(p)= 7911 keV SY | Q(α)= 4035 keV 14 | ||
| Reference: 2021Wa16 |
| References: | |||
| A | 244Pu α decay | B | 238U(t,p) |
| C | 238U(18O,16OG) | D | 238U(136Xe,xγ),(70Zn,xγ) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0 | ABCD | 0+ | 14.1 h 1 % β- = 100 | |||||
| 45 1 | ABCD | (2+) | 45 1 S | | [E2] | 0 | 0+ | |
| 150.6 10 | BCD | (4+) | 105.6 1 | 100 | [E2] | 45 | (2+) | |
| 313.2 10 | CD | (6+) | 162.6 1 | 100 | [E2] | 150.6 | (4+) | |
| 528.7 11 | CD | (8+) | 215.5 1 | 100 | [E2] | 313.2 | (6+) | |
| 792.9 11 | CD | (10+) | 264.1 2 | 100 | [E2] | 528.7 | (8+) | |
| 847.0 11 | CD | (3-) | 696.4 5 801.9 5 | 85 19 100 19 | [E1] [E1] | 150.6 45 | (4+) (2+) | |
| 944.7 11 | CD | (5-) | 631.6 5 794.0 3 | 63 12 100 15 | [E1] [E1] | 313.2 150.6 | (6+) (4+) | |
| 1040 5 | B | |||||||
| 1087.7 11 | CD | (7-) | 558.9 7 774.5 3 | 24 11 100 14 | [E1] [E1] | 528.7 313.2 | (8+) (6+) | |
| 1100.5 11 | CD | (12+) | 307.6 3 | 100 | [E2] | 792.9 | (10+) | |
| 1160 5 | B | |||||||
| 1276.1 11 | CD | (9-) | 482.5 7 747.5 3 | 35 11 100 14 | [E1] [E1] | 792.9 528.7 | (10+) (8+) | |
| 1447.0 15 | D | (14+) | 346.5 10 | | [E2] | 1100.5 | (12+) | |
| 1502.9 15 | D | (11-) | 710.0 10 | | [E1] | 792.9 | (10+) | |
| 1545 5 | B | |||||||
| 1596 5 | B | |||||||
| 1670 5 | B | |||||||
| 1708 5 | B | |||||||
| 1756 5 | B | |||||||
| 1775.7 15 | D | (13-) | 675.2 10 | | [E1] | 1100.5 | (12+) | |
| 1792 5 | B | |||||||
| 1826.4 18 | D | (16+) | 379.4 10 | | [E2] | 1447.0 | (14+) | |
| 1893 5 | B | |||||||
| 1929 5 | B | |||||||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 2010 5 | B | |||||||
| 2089.0 18 | D | (15-) | 642.0 10 | | [E1] | 1447.0 | (14+) | |
| 2236.3 21 | D | (18+) | 409.9 10 | | [E2] | 1826.4 | (16+) | |
| 2428.0 21 | D | (17-) | 601.6 10 | | [E1] | 1826.4 | (16+) | |
| 2668.2 23 | D | (20+) | 431.9 10 | | [E2] | 2236.3 | (18+) | |
| 2801.4 23 | D | (19-) | 565.1 10 | | [E1] | 2236.3 | (18+) | |
| 3116.8 25 | D | (22+) | 448.6 10 | | [E2] | 2668.2 | (20+) | |
| 3181.9 25 | D | (21-) | 513.7 10 | | [E1] | 2668.2 | (20+) | |
| 3572 3 | D | (24+) | 455.1 10 | | [E2] | 3116.8 | (22+) | |
E(level): From a least-squares fit to Eγ for levels connected by γ transitions, except where noted.
Jπ(level): Primarily based upon observed rotational-band structure, and by analogy to Kπ=0- octupole band in 238U.
M(γ): Multipolarities for transitions between the ground-state rotational band are assumed to be of E2 character, while transitions from the presumed octupole band are assumed to be E1.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - GS band | |||||||
| 0 | 0+ | 14.1 h 1 % β- = 100 | |||||
| 45 1 | (2+) | 45 1 S | | [E2] | 0 | 0+ | |
| 150.6 10 | (4+) | 105.6 1 | 100 | [E2] | 45 | (2+) | |
| 313.2 10 | (6+) | 162.6 1 | 100 | [E2] | 150.6 | (4+) | |
| 528.7 11 | (8+) | 215.5 1 | 100 | [E2] | 313.2 | (6+) | |
| 792.9 11 | (10+) | 264.1 2 | 100 | [E2] | 528.7 | (8+) | |
| 1100.5 11 | (12+) | 307.6 3 | 100 | [E2] | 792.9 | (10+) | |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 2 - Kπ=0-, octupole band | |||||||
| 847.0 11 | (3-) | ||||||
| 944.7 11 | (5-) | 631.6 5 794.0 3 | 63 12 100 15 | [E1] [E1] | 313.2 150.6 | (6+) (4+) | |
| 1087.7 11 | (7-) | 558.9 7 774.5 3 | 24 11 100 14 | [E1] [E1] | 528.7 313.2 | (8+) (6+) | |
| 1276.1 11 | (9-) | 482.5 7 747.5 3 | 35 11 100 14 | [E1] [E1] | 792.9 528.7 | (10+) (8+) | |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 45 | (2+) | 45 1 | [E2] | 6.0×102 | α=6.0×102 7, α(L)=4.4E2 5, α(M)=122 14, α(N)=33 4, α(O)=7.6 9, α(P)=1.22 14, α(Q)=0.00292 31 | |
| 150.6 | (4+) | 105.6 1 | [E2] | 10.34 | α=10.34 15, α(L)=7.53 11, α(M)=2.090 31, α(N)=0.567 8, α(O)=0.1304 19, α(P)=0.02136 31, α(Q)=8.98×10-5 13 | |
| 313.2 | (6+) | 162.6 1 | [E2] | 1.663 | α=1.663 24, α(K)=0.2049 29, α(L)=1.063 15, α(M)=0.294 4, α(N)=0.0798 11, α(O)=0.01839 26, α(P)=0.00305 4, α(Q)=2.232×10-5 32 | |
| 528.7 | (8+) | 215.5 1 | [E2] | 0.569 | α=0.569 8, α(K)=0.1367 19, α(L)=0.316 4, α(M)=0.0867 12, α(N)=0.02352 33, α(O)=0.00544 8, α(P)=0.000912 13, α(Q)=1.029×10-5 14 | |
| 792.9 | (10+) | 264.1 2 | [E2] | 0.282 | α=0.282 4, α(K)=0.0952 13, α(L)=0.1370 20, α(M)=0.0373 5, α(N)=0.01013 15, α(O)=0.002349 34, α(P)=0.000398 6, α(Q)=6.17×10-6 9 | |
| 847.0 | (3-) | 696.4 5 | [E1] | 0.00716 | α=0.00716 10, α(K)=0.00582 8, α(L)=0.001013 14, α(M)=0.0002413 34, α(N)=6.46×10-5 9, α(O)=1.560E-5 22, α(P)=2.95E-6 4, α(Q)=2.187E-7 31 | |
| (3-) | 801.9 5 | [E1] | 0.00553 | α=0.00553 8, α(K)=0.00451 6, α(L)=0.000775 11, α(M)=0.0001842 26, α(N)=4.93×10-5 7, α(O)=1.192E-5 17, α(P)=2.265E-6 32, α(Q)=1.707E-7 24 | ||
| 944.7 | (5-) | 631.6 5 | [E1] | 0.00859 | α=0.00859 12, α(K)=0.00697 10, α(L)=0.001225 17, α(M)=0.000292 4, α(N)=7.83×10-5 11, α(O)=1.887E-5 27, α(P)=3.57E-6 5, α(Q)=2.60E-7 4 | |
| (5-) | 794.0 3 | [E1] | 0.00563 | α=0.00563 8, α(K)=0.00459 6, α(L)=0.000789 11, α(M)=0.0001877 26, α(N)=5.03×10-5 7, α(O)=1.215E-5 17, α(P)=2.307E-6 32, α(Q)=1.736E-7 24 | ||
| 1087.7 | (7-) | 558.9 7 | [E1] | 0.01085 | α=0.01085 15, α(K)=0.00878 12, α(L)=0.001564 22, α(M)=0.000374 5, α(N)=0.0001001 14, α(O)=2.410×10-5 34, α(P)=4.54E-6 6, α(Q)=3.25E-7 5 | |
| (7-) | 774.5 3 | [E1] | 0.00589 | α=0.00589 8, α(K)=0.00480 7, α(L)=0.000827 12, α(M)=0.0001967 28, α(N)=5.27×10-5 7, α(O)=1.273E-5 18, α(P)=2.417E-6 34, α(Q)=1.813E-7 25 | ||
| 1100.5 | (12+) | 307.6 3 | [E2] | 0.1743 | α=0.1743 25, α(K)=0.0716 10, α(L)=0.0754 11, α(M)=0.02040 30, α(N)=0.00553 8, α(O)=0.001286 19, α(P)=0.0002202 32, α(Q)=4.29×10-6 6 | |
| 1276.1 | (9-) | 482.5 7 | [E1] | 0.01448 | α=0.01448 21, α(K)=0.01168 17, α(L)=0.002116 30, α(M)=0.000507 7, α(N)=0.0001357 19, α(O)=3.26×10-5 5, α(P)=6.11E-6 9, α(Q)=4.28E-7 6 | |
| (9-) | 747.5 3 | [E1] | 0.00629 | α=0.00629 9, α(K)=0.00512 7, α(L)=0.000884 12, α(M)=0.0002105 30, α(N)=5.64×10-5 8, α(O)=1.362E-5 19, α(P)=2.58E-6 4, α(Q)=1.930E-7 27 | ||
| 1447.0 | (14+) | 346.5 10 | [E2] | 0.1227 | α=0.1227 20, α(K)=0.0572 9, α(L)=0.0482 8, α(M)=0.01295 23, α(N)=0.00351 6, α(O)=0.000818 14, α(P)=0.0001412 25, α(Q)=3.26×10-6 5 | |
| 1502.9 | (11-) | 710.0 10 | [E1] | 0.00691 | α=0.00691 10, α(K)=0.00562 8, α(L)=0.000976 14, α(M)=0.0002324 33, α(N)=6.23×10-5 9, α(O)=1.503E-5 21, α(P)=2.85E-6 4, α(Q)=2.113E-7 30 | |
| 1775.7 | (13-) | 675.2 10 | [E1] | 0.00758 | α=0.00758 11, α(K)=0.00616 9, α(L)=0.001075 15, α(M)=0.000256 4, α(N)=6.86×10-5 10, α(O)=1.656E-5 24, α(P)=3.13E-6 4, α(Q)=2.310E-7 33 | |
| 1826.4 | (16+) | 379.4 10 | [E2] | 0.0953 | α=0.0953 15, α(K)=0.0482 7, α(L)=0.0347 6, α(M)=0.00927 16, α(N)=0.00251 4, α(O)=0.000587 10, α(P)=0.0001019 17, α(Q)=2.66×10-6 4 | |
| 2089.0 | (15-) | 642.0 10 | [E1] | 0.00833 | α=0.00833 12, α(K)=0.00676 10, α(L)=0.001186 17, α(M)=0.000283 4, α(N)=7.58×10-5 11, α(O)=1.828E-5 26, α(P)=3.45E-6 5, α(Q)=2.53E-7 4 | |
| 2236.3 | (18+) | 409.9 10 | [E2] | 0.0775 | α=0.0775 12, α(K)=0.0417 6, α(L)=0.0264 4, α(M)=0.00703 12, α(N)=0.001903 31, α(O)=0.000445 7, α(P)=7.78×10-5 13, α(Q)=2.246E-6 34 | |
| 2428.0 | (17-) | 601.6 10 | [E1] | 0.00942 | α=0.00942 14, α(K)=0.00764 11, α(L)=0.001349 19, α(M)=0.000322 5, α(N)=8.63×10-5 12, α(O)=2.078E-5 30, α(P)=3.92E-6 6, α(Q)=2.84E-7 4 | |
| 2668.2 | (20+) | 431.9 10 | [E2] | 0.0677 | α=0.0677 10, α(K)=0.0378 6, α(L)=0.02208 35, α(M)=0.00585 9, α(N)=0.001585 26, α(O)=0.000371 6, α(P)=6.52×10-5 10, α(Q)=2.005E-6 30 | |
| 2801.4 | (19-) | 565.1 10 | [E1] | 0.01062 | α=0.01062 15, α(K)=0.00860 12, α(L)=0.001529 22, α(M)=0.000365 5, α(N)=9.79×10-5 14, α(O)=2.356E-5 34, α(P)=4.44E-6 6, α(Q)=3.19E-7 5 | |
| 3116.8 | (22+) | 448.6 10 | [E2] | 0.0616 | α=0.0616 9, α(K)=0.0352 5, α(L)=0.01943 31, α(M)=0.00514 8, α(N)=0.001391 22, α(O)=0.000326 5, α(P)=5.74×10-5 9, α(Q)=1.849E-6 27 | |
| 3181.9 | (21-) | 513.7 10 | [E1] | 0.01279 | α=0.01279 19, α(K)=0.01033 15, α(L)=0.001858 27, α(M)=0.000445 6, α(N)=0.0001190 17, α(O)=2.86×10-5 4, α(P)=5.38E-6 8, α(Q)=3.81E-7 6 | |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 3572 | (24+) | 455.1 10 | [E2] | 0.0594 | α=0.0594 9, α(K)=0.0343 5, α(L)=0.01853 29, α(M)=0.00489 8, α(N)=0.001324 21, α(O)=0.000311 5, α(P)=5.47×10-5 9, α(Q)=1.793E-6 26 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 0+ | 14.1 h 1 % β- = 100 | E(level): GS band. |
| 45 | (2+) | E(level): GS band. | |
| 150.6 | (4+) | E(level): GS band. | |
| 313.2 | (6+) | E(level): GS band. | |
| 528.7 | (8+) | E(level): GS band. | |
| 792.9 | (10+) | E(level): GS band. | |
| 847.0 | (3-) | E(level): Kπ=0-, octupole band. | |
| 944.7 | (5-) | E(level): Kπ=0-, octupole band. | |
| 1087.7 | (7-) | E(level): Kπ=0-, octupole band. | |
| 1100.5 | (12+) | E(level): GS band. | |
| 1276.1 | (9-) | E(level): Kπ=0-, octupole band. |
$ See 2023Ni04 for recent mass measurement.
Q-value: ΔS(p)=196 (2021Wa16)
Q-value: S(2n)=10735 3, S(2p)=14387 syst 283 (2021Wa16)