ADOPTED LEVELS, GAMMAS for 151Yb
Author: Balraj Singh | Citation: Nucl. Data Sheets 110, 1 (2009) | Cutoff date: 20-Nov-2008
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-11434 keV 425 | S(n)= 10975 keV 425 | S(p)= 2340 keV 359 | Q(α)= 2.6×103 keV 3 | ||
| S(2n)= 24487 keV 425 | S(2p)= 2.4×103 keV 359 | Q(EC)= 9.2×103 keV 3 | Q(ECp)= 9.0×103 keV 3 | ||
| Reference: 2017WA10 | |||||
| References: | |||
| A | 151Yb IT decay (20 μs) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | (1/2+) | 1.6 s 1 % ε = 100 % εp > 0 | ||||||
| 0.0+X | A | (11/2-) | 1.6 s 1 % εp = ? % IT ≈ 0.4 % ε ≈ 100 | |||||
| 1531.3+X | A | (15/2-) | 1531.3 5 | 100 | 0.0+X | (11/2-) | ||
| 1734.7+X | A | (17/2+) | 203.4 5 | 100 | E1 | 1531.3+X | (15/2-) | |
| 1791.2+X | A | 57.1 2 259.4 3 | 55 15 100 15 | 1734.7+X 1531.3+X | (17/2+) (15/2-) | |||
| 1791.2+Y | A | 2.6 µs 7 % IT ≈ 100 | ||||||
| 1791.2+Z | A | |||||||
| 1993.2+Z? | A | 202.0 4 ? | 100 | 1791.2+Z | ||||
| 2165.4+Z? | A | 172.2 4 ? | 100 | 1993.2+Z | ||||
| 2391+Z | A | (23/2-) | 226.0 4 ? 599.9 4 | 9 1 100 7 | 2165.4+Z 1791.2+Z | |||
| 2448+Z | A | (27/2-) | 20 µs 1 % IT = 100 | 57 2 | | [E2] | 2391+Z | (23/2-) |
Jπ(level): From systematics of neighboring nuclides such as 147Dy and 149Er. See 1987Br14 and 1993Ni05 for discussion
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 1734.7+X | (17/2+) | 203.4 5 | E1 | 0.0531 | α=0.0531, α(K)=0.044, α(L)=0.0067, α(M)=0.00150 | |
| 2448+Z | (27/2-) | 20 µs 1 % IT = 100 | 57 2 | [E2] | 32 | B(E2)(W.u.)=0.030 6, α=32 6 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (1/2+) | 1.6 s 1 % ε = 100 % εp > 0 | Configuration=νs1/2. |
| 0.0+X | (11/2-) | 1.6 s 1 % εp = ? % IT ≈ 0.4 % ε ≈ 100 | %IT=0.4 (from syst of M4 transitions and T1/2=1.6~s, 1990Ak01). The isomeric decay is expected through M4-M1 cascade via a d3/2 neutron state at≈150~keV (1990Ak01), but no such transitions have been observed (1990Ak01) due to low production of 151Yb and expected low %IT. |
| E(level) | E(gamma) | Comments |
| 1734.7+X | 203.4 | M(γ): from α(K)exp=0.068~18 (1995Ni10) |
1986To12: this nucleus was identified via its β-delayed proton decay. It was produced in 96Ru(58Ni,n2p) reaction at E=360~MeV. The isotopic identification was made on the basis that the measured lifetime is new to the isobaric chain and the protons are in coincidence with Tm x-rays and known 150Er γ rays. Further evidence for isotopic identification is provided (1995Ni10) by the mass gated ce studies using fragment mass analyzer
The delayed proton spectrum extends from≈2.5~MeV to≈7~MeV and shows a 1.6~s~1 half-life.
No α decay from 155Hf, T1/2=0.89~s~12 (to 151Yb) has been reported (1981HoZM). For Q(α)=5245 to 3895, systematics of α decay give %α from 1 to 1.0×10-8 (see Nuclear Data Sheets for α=155, 2005Re01)
The ordering of the 226-172-202 cascade is not established. The placement of these γ rays is based on matching of 600γ with sum of 226, 172 and 202 γ rays.