ADOPTED LEVELS, GAMMAS for 154Hf
Author: N. Nica | Citation: Nucl. Data Sheets 200, 2 (2025) | Cutoff date: 22-Aug-2022
Full ENSDF file | Adopted Levels (PDF version)
| S(n)= 13500 keV SY | S(p)= 1640 keV SY | Q(α)= 3680 keV SY | |||
| Reference: 2021WA16 |
| References: | |||
| A | 154Hf IT decay (9 μs) | B | 155Ta p decay |
| C | 158W α decay (1.25 MS) | D | 158W α decay (0.143 MS) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | M(γ) | Final Levels | |
| 0 | ABCD | 0+ | 2 s 1 % ε ≈ 100 % α ≈ 0 | ||||
| 1513 | A | (2+) | 1513 | 0 | 0+ | ||
| 2011 | A | (3-) | 498 | 1513 | (2+) | ||
| 2146 | A | (5-) | 135 | 2011 | (3-) | ||
| 2457 | A | (7-) | 311 | 2146 | (5-) | ||
| 2671 | A | (8+) | 214 | 2457 | (7-) | ||
| 2713 | A | (10+) | 9 µs 4 % IT = 100 | ≈42 | [E2] | 2671 | (8+) |
E(level): The ordering of the γ’s and thus the level energies are based on the systematics of the levels in the lighter-mass n=82 nuclides 148Dy, 150Er and 154Yb (see the 154Hf IT decay data set).
Jπ(level): Based on the systematics of the lighter-mass doubly even n=82 nuclides
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 2713 | (10+) | 9 µs 4 % IT = 100 | ≈42 | [E2] | 166 | B(E2)(W.u.)=0.059 +44-19, α166 AP |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 2671 | (8+) | Jπ(level): Configuration=(π h11/2)6(π h11/2)28+, seniority=2. | |
| 2713 | (10+) | 9 µs 4 % IT = 100 | Jπ(level): Configuration=(π h11/2)6(π h11/2)210+, seniority=2. |
| E(level) | E(gamma) | Comments |
| 2713 | 42 | E(γ): 42~28 from 1989Mc07 and based on systematics. |
The data on the excited states are all from the study of the 154Hf IT decay (1993Mc03,1989Mc07)
Q-value: ΔS(n)=420, ΔS(p)=340, ΔQ(α)=420 (syst,2021Wa16)
Q-value: S(2p)=1040 340, Q(εp)=7140 360 (syst,2021Wa16)