ADOPTED LEVELS, GAMMAS for 99Rb
Authors: E. Browne, J. K. Tuli | Citation: Nucl. Data Sheets 145, 25 (2017) | Cutoff date: 1-Jul-2017
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=11400.2 keV 62 | S(n)= 4823 keV 17 | S(p)= 14099 keV SY | Q(α)= -9775 keV SY | ||
| Reference: 2017WA10 |
| References: | |||
| A | Coulomb Excitation | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | A | (3/2+) | 54 ms 4 % β- = 100 % β-n = 19.8 20 % β-2n = ? | |||||
| 65 1 | A | (5/2+) | 65 | 100 | [M1+E2] | 0.0 | (3/2+) | |
| 183 1 | A | (7/2+) | 118 183 | 100 6 9.4 21 | [M1+E2] [E2] | 65 0.0 | (5/2+) (3/2+) | |
| 287 1 | A | (9/2+) | 104 222 | 100 48 <74 | [M1+E2] [E2] | 183 65 | (7/2+) (5/2+) | |
| 509 1 | A | (11/2+) | 222 326 | <340 100 34 | [M1+E2] [E2] | 287 183 | (9/2+) (7/2+) | |
E(level): From Coulomb excitation
Jπ(level): The 65 and all above levels are assigned (2015So20) spin-parities based on comparison with a similar structure in 97Rb. See also theoretical calculations by 2010Ro31 which predict prolate ground state with π3/2[431] Nilsson configuration.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - Ground-state band. | |||||||
| 0.0 | (3/2+) | 54 ms 4 % β- = 100 % β-n = 19.8 20 % β-2n = ? | |||||
| 65 1 | (5/2+) | 65 | 100 | [M1+E2] | 0.0 | (3/2+) | |
| 183 1 | (7/2+) | 118 183 | 100 6 9.4 21 | [M1+E2] [E2] | 65 0.0 | (5/2+) (3/2+) | |
| 287 1 | (9/2+) | 104 222 | 100 48 <74 | [M1+E2] [E2] | 183 65 | (7/2+) (5/2+) | |
| 509 1 | (11/2+) | 222 326 | <340 100 34 | [M1+E2] [E2] | 287 183 | (9/2+) (7/2+) | |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 65 | (5/2+) | 65 | [M1+E2] | 2.6 | α=2.6 21, α(K)=2.1 17, α(L)=0.41 37, α(M)=0.068 60, α(N)=0.0068 59, α(O)=1.5×10-4 12 | |
| 183 | (7/2+) | 118 | [M1+E2] | 0.31 | α=0.31 22, α(K)=0.27 19, α(L)=0.037 28, α(M)=0.0061 47, α(N)=6.5×10-4 48, α(O)=2.1E-5 14 | |
| (7/2+) | 183 | [E2] | 0.1054 | α=0.1054, α(K)=0.0916 13, α(L)=0.01165 17, α(M)=0.00192 3, α(N)=0.000207 3, α(O)=7.33×10-6 11 | ||
| 287 | (9/2+) | 104 | [M1+E2] | 0.49 | α=0.49 36, α(K)=0.41 30, α(L)=0.061 48, α(M)=0.0100 79, α(N)=0.00105 81, α(O)=3.2×10-5 22 | |
| (9/2+) | 222 | [E2] | 0.0524 | α=0.0524, α(K)=0.0457 7, α(L)=0.00561 8, α(M)=0.000924 13, α(N)=0.0001006 14, α(O)=3.72×10-6 6 | ||
| 509 | (11/2+) | 222 | [M1+E2] | 0.035 | α=0.035 18, α(K)=0.031 16, α(L)=0.0036 20, α(M)=6.0×10-4 33, α(N)=6.6E-5 35, α(O)=2.5E-6 12 | |
| (11/2+) | 326 | [E2] | 0.01364 | α=0.01364, α(K)=0.01199 17, α(L)=0.001394 20, α(M)=0.000230 4, α(N)=2.54×10-5 4, α(O)=1.001E-6 14 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (3/2+) | 54 ms 4 % β- = 100 % β-n = 19.8 20 % β-2n = ? | Theoretical T1/2=40.4 ms, %β-n=27.5, %β-2n=0.03 (2003Mo09). E(level): Ground-state band. |
| 65 | (5/2+) | E(level): Ground-state band. | |
| 183 | (7/2+) | E(level): Ground-state band. | |
| 287 | (9/2+) | E(level): Ground-state band. | |
| 509 | (11/2+) | E(level): Ground-state band. |
99Rb isotope was identified in 1971Tr02 from 238U(p,F),E=50 MeV at Orsay, with a half-life measurement of 76 ms, longer than several other half-life measurements.
Delayed-neutron decay to excited states of 98Sr was studied by 1982Kr11.
Q-value: Estimated uncertainties (2017Wa10): 298 forr S(p) and 298 for Q(α)