ADOPTED LEVELS for 165Ir
Authors: Balraj Singh and Jun Chen | Citation: Nucl. Data Sheets 194, 460 (2024) | Cutoff date: 31-Oct-2022
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-11280 keV SY | S(n)= 12180 keV SY | S(p)= -1540 keV SY | Q(α)= 6820 keV SY | ||
| Reference: 2021WA16 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0? | (1/2+) | < 1 µs % p = ? % α = ? |
| 0+X | (11/2-) | 327 µs 40 % p = 88 2 % α = 12 2 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | (1/2+) | < 1 µs % p = ? % α = ? | No evidence was found by 2014Dr02 for the ground state decay of 165Ir. |
| 0+X | (11/2-) | 327 µs 40 % p = 88 2 % α = 12 2 | %p and %α in 2014Dr02 were based on observed 165Ir α-decay yield with 35 events, and proton-decay yield with 270 events. Values of %p=87 4, %α=13 4 measured by 1997Da07 are nearly the same, but somewhat less precise. E(level): %p and %α in 2014Dr02 were based on observed 165Ir α-decay yield with 35 events, and proton-decay yield with 270 events. Values of %p=87 4, %α=13 4 measured by 1997Da07 are nearly the same, but somewhat less precise. |
1997Da07: 92Mo(78Kr,p4n),E=384 MeV; recoil mass separator with PPAC/DSSD detectors at focal plane (FMA) at ATLAS-ANL facility
2001Ke05: 106Cd(64Zn,p4n), gas-filled recoil separator RITU system.
2014Dr02: 165Ir nuclei were produced in the fusion-evaporation reaction 92Mo(78Kr,p4n) with E=428, 435 and 450 MeV 78Kr beams from the K130 cyclotron at the Accelerator Laboratory of the University of Jyvaskyla, bombarding an isotopically enriched, self-supporting 92Mo target foil of 500 μm/cm2 thickness. Evaporation residues were separated and transported using the gas-filled separator ion transport unit (RITU) to the GREAT spectrometer. The ions passed through a multiwire proportional counter (MWPC) and were implanted into two adjacently mounted DSSDs. Measured Eα, Iα, E(p), I(p), recoil-decay correlations, decay time distribution. Deduced 165Ir isomer half-life, decay branching ratios. About 270 165Ir πh11/2 isomer proton-decay events and 35 α-decay events were observed and identified from correlations with the α decay of daughter nuclei.
Theoretical calculations: consult Nuclear Science References (NSR) database primary references dealing mostly with various aspects of proton decay of 165Ir.
Q-value: Estimated uncertainties (2021Wa16): ΔQ(β-)=430, ΔS(n)=350, ΔS(p)=ΔQ(α)=50 (syst, 2021Wa16)
Q-value: S(2n)=22430 430, S(2p)=170 160, Q(ε)=10150 260, Q(εp)=8590 150 (syst, 2021Wa16)