Author: F.G. Kondev |  Citation: Nucl. Data Sheets 159, 1 (2019) |  Cutoff date: 30-Aug-2019 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=4610 keV SYS(n)= 4300 keV SYS(p)= 10860 keV CAQ(α)= -1340 keV SY
Reference: 2017WA10

General Comments:

2012Ku26: 177Er 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), measured using two plastic scintillation detectors, ionization chambers (MUSIC) and four time-projection chambers (TPC), respectively. 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 known isomers were recorded in coincidence with the incoming ions using either the RISING array of Ge detectors or only two Ge detectors, a stopper foil and a scintillator for veto signal. Measured production cross section.

Jπ(level) T1/2(level)
  0.0 (1/2-) % β- = 100

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Additional Level Data and Comments:

  0.0(1/2-) % β- = 100
Neutron-rich nuclide where only the β- decay mode is expected.
E(level): Neutron-rich nuclide where only the β- decay mode is expected.

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