ADOPTED LEVELS for 77Y

Author: Balraj Singh |  Citation: ENSDF |  Cutoff date: 30-SEP-2020 

Authors: Balraj Singh, Ninel Nica |  Citation: Nucl. Data Sheets 113, 1115 (2012) |  Cutoff date: 30-Mar-2012 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-14400 keV SYS(n)= 16030 keV SYS(p)= -520 keV SYQ(α)= -2780 keV SY
Reference: 2017WA10

General Comments:

1989HoZG (also 1989HoZK): tentative evidence of production of 77Y in 40Ca(40Ca,p2n) reaction at 100 MeV. Search for delayed protons from the decay of 77Y within a T1/2 range of 10-100 μs and proton energy range of 25-600 keV proved negative

1999Ja02 (also 1997Re12): identification of 77Y in Ni(92Mo,X) reaction at E=60 MeV/nucleon, followed by mass and charge analysis at GANIL facility using LISE3 spectrometer. Measured lower limit of half-life. Microscopic-macroscopic calculations and systematics to estimate spin-parity of g.s.

2002Fa13, 2001Ki13: production of 77Y in 9Be(112Sn,X) at 1 GeV/nucleon, GSI facility using fragment separator. Measured β+ particles, γ rays, βγ coin, isotopic half-life. 2007WeZX is a preprint of the results reported in 2002Fa13 and 2001Ki13

Theoretical calculations: consult the NSR database at www.nndc.bnl.gov for three primary theory references dealing with nuclear structure calculations.

Q-value: Estimated uncertainties (2017Wa10): 450 for Q(β-), 360 for S(n), 200 for S(p), 290 for Q(α)

Q-value: S(2n)=30760 360, S(2p)=3800 200, Q(εp)=6750 200 (syst, 2017Wa10)





E(level)
(keV)
Jπ(level) T1/2(level)
  0 (5/2+) 57 ms +22-12 
% ε = 100
% εp = ?
% p = ?

Back to top

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  0(5/2+) 57 ms +22-12 
% ε = 100
% εp = ?
% p = ?
From detection of β+ and γ events, 2002Fa13 conclude that β+ decay mode is dominant while proton emission branch is expected to be small. The ground state is probably unbound towards proton emission.
E(level): From detection of β+ and γ events, 2002Fa13 conclude that β+ decay mode is dominant while proton emission branch is expected to be small. The ground state is probably unbound towards proton emission.

Back to top