ADOPTED LEVELS, GAMMAS for 86Se
Authors: A. Negret and B. Singh | Citation: Nucl. Data Sheets 203, 283 (2025) | Cutoff date: 20-Jan-2025
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=5129 keV 4 | S(n)= 6161 keV 4 | S(p)= 14603 keV 4 | Q(α)= -7513 keV 3 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 86As β- decay (0.945 S) | B | 87As β-n decay (482 MS) |
| C | 88As β-2n decay (189.1 MS) | D | 9Be(238U,Fγ) |
| E | 248Cm,252Cf SF decay | F | 238U(p,F) |
| G | 238U(82Se,86SeG) | H | Coulomb Excitation |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | AB DEFGH | 0+ | 14.3 s 3 % β- = 100 | |||||
| 704.31 5 | AB DEFGH | 2+ | 7.3 ps 8 | 704.30 5 | 100 | E2 | 0.0 | 0+ |
| 1317.6 5 ? | A | (0+:4+) | 613.3 5 ? | 100 | 704.31 | 2+ | ||
| 1398.95 7 | AB G | (2+) | 694.65 5 1399.1 2 | 100 8 46 8 | 704.31 0.0 | 2+ 0+ | ||
| 1543.6 3 | A | (0+:4+) | 839.3 3 | 100 | 704.31 | 2+ | ||
| 1567.72 12 | AB EFG | 4+ | ≤ 9.2 ps | 863.4 1 | 100 | E2 | 704.31 | 2+ |
| 2072.73 15 | A EF | (4+) | 505.0 1 674.2 3 ? | 100 33 17 10 | 1567.72 1398.95 | 4+ (2+) | ||
| 2180.65 11 | A | (0+:4+) | 782.2 2 1476.2 1 | 23 8 100 25 | 1398.95 704.31 | (2+) 2+ | ||
| 2208.32 11 | A | (2+) | 1504.0 1 2208 1 | 100 13 3.8 25 | 704.31 0.0 | 2+ 0+ | ||
| 2372.28 9 | A | (0+:4+) | 973.3 1 1668.0 1 | 19 6 100 9 | 1398.95 704.31 | (2+) 2+ | ||
| 2648.3 10 ? | A | (0+:4+) | 1944 1 ? | 100 | 704.31 | 2+ | ||
| 2846.1 4 | EF | (6+) | 1278.4 3 | 100 | 1567.72 | 4+ | ||
| 3032.7 10 | EF | (4,5,6+) | 1465 | | 1567.72 | 4+ | ||
| 3062.5 4 | EF | (4,5,6+) | 989.5 5 1495.1 5 | 100 50 50 25 | 2072.73 1567.72 | (4+) 4+ | ||
| 3302.1 6 | EF | (6,7,8+) | 456.0 4 | 100 | 2846.1 | (6+) | ||
| 3729.4 10 ? | A | (0+:4+) | 3025 1 ? | 100 | 704.31 | 2+ | ||
| 4089.7 11 | F | 1027.2 | | 3062.5 | (4,5,6+) | |||
| 4097.7 11 | F | (6,7,8+) | 1251.6 | | 2846.1 | (6+) | ||
| 4236.96 14 | A | (0+:4+) | 1864.8 2 2028.7 3 3532.4 2 | 25 8 17 8 100 17 | 2372.28 2208.32 704.31 | (0+:4+) (2+) 2+ | ||
| 4783.22 21 | A | (0+:4+) | 3384.2 2 | 100 | 1398.95 | (2+) | ||
| 5103.7 15 | F | 1014.0 | | 4089.7 | ||||
E(level): From least-squares fit to Eγ values
Jπ(level): Systematics of neighboring isotones and the population and decay branches (2013Cz02), and shell-model calculations (2015Ma51)
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - g.s. yrast band | |||||||
| 0.0 | 0+ | 14.3 s 3 % β- = 100 | |||||
| 704.31 5 | 2+ | 7.3 ps 8 | 704.30 5 | 100 | E2 | 0.0 | 0+ |
| 1567.72 12 | 4+ | ≤ 9.2 ps | 863.4 1 | 100 | E2 | 704.31 | 2+ |
| 2846.1 4 | (6+) | 1278.4 3 | 100 | 1567.72 | 4+ | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Additional Data |
| 704.31 | 2+ | 7.3 ps 8 | 704.30 5 | E2 | B(E2)(W.u.)=19.8 +24-20 |
| 1567.72 | 4+ | ≤ 9.2 ps | 863.4 1 | E2 | B(E2)(W.u.)≥5.7 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 0+ | 14.3 s 3 % β- = 100 | E(level): g.s. yrast band. |
| 704.31 | 2+ | 7.3 ps 8 | B(E2)=0.211 32 (2017El04) B(E2) from Coulomb excitation. E(level): g.s. yrast band. |
| 1398.95 | (2+) | XREF: γ(?). | |
| 1567.72 | 4+ | ≤ 9.2 ps | E(level): g.s. yrast band. |
| 2846.1 | (6+) | E(level): g.s. yrast band. |
| E(level) | E(gamma) | Comments |
| 2072.73 | 674.2 | E(γ): γ seen only in β- decay |
| 2846.1 | 1278.4 | E(γ): From 248Cm,252Cf SF decay |
| 3032.7 | 1465 | E(γ): From 248Cm,252Cf SF decay |
| 3062.5 | 989.5 | E(γ): From 248Cm,252Cf SF decay I(γ): From 248Cm,252Cf SF decay | 1495.1 | E(γ): From 248Cm,252Cf SF decay I(γ): From 248Cm,252Cf SF decay |
| 3302.1 | 456.0 | E(γ): From 248Cm,252Cf SF decay |
| 4089.7 | 1027.2 | E(γ): From 238U(p,F):prompt γ |
| 4097.7 | 1251.6 | E(γ): From 238U(p,F):prompt γ |
| 5103.7 | 1014.0 | E(γ): From 238U(p,F):prompt γ |
86Se nuclide first produced by 1960Sa05 who assigned a 16S activity incorrectly to 87Se. Confirmed identification is from the work of 1973Ta19, and later studies 1974KrZG, 1975Hu02 and 1978Ze08
Precise mass measurements: 2008Ha23, 2008Su19
Theoretical structure calculations:
2022No05, 2021No05, 2017No04: calculated potential energy surfaces in (β2,β3) plane, levels, Jπ, B(E1), B(E2), B(E3), intruder configuration in 0+ states, spectroscopic quadrupole moments of 2+ state, ρ2(E0) using interacting boson model with self-consistent mean-field theory, based on the Gogny-D1M energy density functional.
2021Co08: calculated total energy per nucleon for the prolate and oblate solutions, deformation parameters β2, charge radius, charge density, splittings between centroid energies of spin-orbit partner multiplets using Hartree-Fock (HF) method with pairing effects by BCS method, and Gogny type D1S and D1ST2a interactions containing tensor terms.
2020Ab05: calculated potential energy surface in (β2,γ) plane, S(2n), neutron-, proton-, and charge-radii, β and γ deformations using relativistic Hartree-Bogoliubov formalism with density-dependent zero- and finite-range NL3* and DD-PC1 interactions.
2018Th06: calculated levels, Jπ, B(E2), potential energy curves, collective wave function contours in (β2,γ) plane, triaxiality, deformation parameter β2, oblate and prolate potential energy curve minima using Algebraic collective model (ACM) with five-dimensional collective Hamiltonian, and symmetry conserving configuration mixing (SCCM) method with Gogny energy density functionals (EDF); and Skyrme-Hartree-Fock model (SHF).
2015Al12: calculated levels, Jπ, B(E2), B(M1), γ branching ratios, staggering parameter S(J) using interacting boson model (IBM-2), and boson-fermion model (IBFM-2).
2015Ma51: calculated levels, Jπ, B(M1), B(E2) using shell model
2013Si25: calculated levels, Jπ, yrast and excited bands, intrinsic and spectroscopic quadrupole moments, B(E2), deformation parameters β and γ, potential energy surface contours in (β,γ) plane using algebraic pseudo-SU(3) model, shell model with space outside 78Ni core, and the particle and angular momentum symmetry conserving beyond-mean field method with Gogny forces.
Other theory references for structure: 13 references retrieved from the NSR database are listed in this dataset as ’document’ records.
Q-value: S(2n)=10698 3, S(2p)=26933 4, Q(β-n)=1 4 (2021Wa16)