ADOPTED LEVELS for 167Ir
Authors: Balraj Singh and Jun Chen | Citation: Nucl. Data Sheets 191, 1 (2023) | Cutoff date: 22-Aug-2023
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-10320 keV SY | S(n)= 11840 keV SY | S(p)= -1070 keV 4 | Q(α)= 6504.9 keV 26 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 171Au α decay (1.04 MS) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
| 0.0 | 1/2+ | 30.2 ms 10 % ε = 17.5 25 % p = 39.0 15 % α = 43.5 20 | |
| 175.3 22 | A | 11/2- | 28.6 ms 9 % ε = 9.6 30 % p = 0.42 8 % α = 90 3 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 1/2+ | 30.2 ms 10 % ε = 17.5 25 % p = 39.0 15 % α = 43.5 20 | %α=43.5 20 from weighted average of %α=43 2 (2005Sc22) and 48 6 (1997Da07). E(level): %α=43.5 20 from weighted average of %α=43 2 (2005Sc22) and 48 6 (1997Da07). |
| 175.3 | 11/2- | 28.6 ms 9 % ε = 9.6 30 % p = 0.42 8 % α = 90 3 | %α=90 3 from weighted average of %α=90 3 (2005Sc22) and 80 10 (1997Da07). E(level): %α=90 3 from weighted average of %α=90 3 (2005Sc22) and 80 10 (1997Da07). |
1981Ho10: 167Ir produced and identified in 112Sn(58Ni,p2n), E(58Ni)=4.4 MeV/nucleon, followed by mass separation using the velocity filter SHIP at the UNILAC facility of GSI. The evaporation residues were implanted into an array of seven position sensitive silicon detectors. Measured Eα=6386 10, T1/2>5 ms for the decay of 167Ir, and α(Re daughter decays)-correlations.
1997Da07: 167Ir produced in 92Mo(78Kr,X),E=357 MeV reaction, followed by mass separation using fragment mass analyzer (FMA), and detection of recoils, α and protons using position-sensitive parallel plate avalanche counter at focal plane, and a double-sided Si strip detector (DSSSD) at the ATLAS-ANL facility. Measured E(p), Eα, decay curves for protons, production σ, and (recoils)pα correlations.
2004Ke06 (also 2001Ke05): 167mIr from 171mAu α decay, the latter produced in 96Ru(78Kr,p2n),E=360-391 MeV, followed by mass separation using RITU separator at the cyclotron facility of the University of Jyvaskyla. The recoils were implanted in the double-sided silicon-strip detectors. Measured Eα, E(p), %p, %α, (recoils)α and (recoils)p correlations, and half-lives of the decay of the isomer of 167Ir. Recoil decay tagging method.
2005Sc22: 167Ir from 171Au α decay, the latter produced in 92Mo(78Kr,p2n),E=360 MeV, followed by mass separation using RITU separator at the cyclotron facility of the University of Jyvaskyla. The recoils were implanted in the double-sided silicon-strip detectors of the GREAT spectrometer, with the γ rays detected using the JUROGAM array of 43 escape-suppressed Ge detectors. Measured Eα, E(p), Eγ, %p, %α, (recoils)α and (recoils)p correlations, and half-lives of the decays of the ground state and the isomer. Recoil decay tagging method.
High-spin studies: 1998CaZZ, 1999CaZW: 78Kr(92Mo,2npγ), E=360 MeV. Measured Eγ, Iγ, γγ-coin, and (recoil)γ-coin using Gammasphere array, and fragment mass analyzer (FMA) at ATLAS-ANL facility. Recoil-decay tagging method. Gamma-ray spectra shown in Figs. 1-15a and 1.15B, the first correlated with α=167 residues, and the second correlated with the α-decay of the 11/2- isomeric state in 167Ir. Authors mentioned that preliminary decay scheme suggested states built on the 11/2 isomer, associated with a weakly deformed or spherical shape. No details of γ-ray energies and intensities, and level scheme are available.
Note: 171Au g.s. decays only by proton emission to 170Pt, not by α decay mode to 167Ir
No reference was found in the NSR database for theoretical structure calculation for 167Ir.
Q-value: ΔQ(β-)=310, ΔS(n)=200 (syst,2021Wa16)
Q-value: S(2n)=21620 160 (syst), S(2p)=991 30, Q(εp)=7480 90, Q(ε)=9430 80 (2021Wa16)