ADOPTED LEVELS for 229Pu
Authors: F.G. Kondev, J.K. Tuli and E. Browne | Citation: Nucl. Data Sheets 208, 397 (2026) | Cutoff date: 23-Oct-2025
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-4.79×103 keV 12 | S(n)= 6780 keV 60 | S(p)= 3720 keV SY | Q(α)= 7600 keV 60 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 233Cm α decay | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
| 0.0 | A | (3/2+) | 88 s +12-6 % ε = 50 20 % α = 50 20 % SF < 7 |
| 93 28 | A |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (3/2+) | 88 s +12-6 % ε = 50 20 % α = 50 20 % SF < 7 | Eα=7465 keV 10 (2002CaZU, 2002CaZZ), 7457 keV 20 (2010Kh06), 7460 keV 30 (1994An02) and 7480 keV 30 (2018Mi11). |
2010Kh06: 229Pu was produced in α decay of 233Cm following 237Cf α decay. The latter was produced in 204Pb(36S,3n) reaction with E(36S)=163.6, 170.0, 172.6, 173.0 and 174.3 MeV provided by the UNILAC accelerator at GSI. An isotopically enriched (>99%) 204Pb target was used. Evaporation residues (ERs) were separated from the primary beam and target-like ions by the velocity filter SHIP and were implanted into a position-sensitive 16-strip Si detector (PSSD). α box of six Si detectors surrounded the PSSD to detect escape α and SF events. α Ge clover detector was mounted behind the PSSD for detecting X and γ rays. Measured Er-αα(t) correlations
2002CaZU, 2002CaZZ: 229Pu was produced in 198Pt(40Ar,5n) reaction with E(40Ar)=208 MeV provided by the UNILAC accelerator at GSI. An isotopically enriched (95.7%) 198Pt target was used. Er were separated from the primary beam and target-like ions by the velocity filter SHIP and were implanted into a position-sensitive Si detector (PSSD). Measured Er-αα(t) correlations.
1994An02: 229Pu was produced in 208Pb(26Mg,5n) reaction with E(26Mg)=145 MeV provided by the U400 Cyclotron of the FLNR, JINR, Dubna. An isotopically enriched (98.7%) 208Pb target was used. Er were separated from the primary beam and target-like ions by the VASSILISSA mass separator and were implanted into a position-sensitive Si detector (PSSD). Measured Er-αα(t) within 200 ms correlation-time window
Q-value: ΔS(p)=120 (syst,2021Wa16)
Q-value: S(2n)=15520 120 (syst), S(2p)=6230 60, Q(ε)=3590 120, Q(εp)=890 60 (2021Wa16)