ADOPTED LEVELS for 179Tm
Authors: Balraj Singh and Michael Birch | Citation: ENSDF | Cutoff date: 30-SEP-2013
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=4940 keV SY | S(n)= 5560 keV SY | S(p)= 8690 keV CA | Q(α)= -820 keV SY | ||
| Reference: 2012Wa38,1997MO25 |
| E(level) (keV) | T1/2(level) |
| 0 | > 160 ns % β- = ? |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | > 160 ns % β- = ? | Production σ=1.21 nb 18 (2012Ku26). |
2012Ku26: 179Tm produced and identified in 9Be(238U,F), E=1 GeV/nucleon reaction using SIS-18 synchrotron facility at GSI. Target=1.6 g/cm2 9Be placed at the entrance of projectile Fragment Separator (FRS). Particle identification was achieved by event-by-event in-flight analysis of time-of-flight, energy loss measurement, and magnetic rigidity (tof-ΔE’-Bρ). Time-of-flight measured using two plastic scintillation detectors, energy loss or deposit by ionization chambers (MUSIC), and magnetic rigidity by four time-projection chambers (TPC), which also provided energy deposit information. Isomer tagging method for known μs isomers was used to verify event-by-event identification and in-flight separation of new isotopes. Gamma rays from the known isomers were recorded in coincidence with the incoming ions using either the RISING array of Ge detectors at GSI or only two Ge detectors, a stopper foil and a scintillator for veto signal. Measured production cross section. Comparison of measured σ with predictions from ABRABLA model and EPAX-3 model
Q-value: Estimated uncertainties (2012Wa38): ΔQ-=540, ΔS(n)=640, ΔS(α)=640
Q-value: S(p) from 1997Mo25; others from 2012Wa38
Q-value: S(2n)=10270 590, Q(β-n)=20 500 from 2012Wa38 (syst). S(2p)=20130 (1997Mo25, theory).