ADOPTED LEVELS, GAMMAS for 79Zn

Author: Balraj Singh |  Citation: Nucl. Data Sheets 135, 193 (2016) |  Cutoff date: 31-May-2016 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=9115.4 keV 29S(n)= 4020.4 keV 30S(p)= 1622×101 keV 50Q(α)= -11610 keV SY
Reference: 2012WA38

References:
  A  79Cu β- decay (241.0 MS)  B  2H(78Zn,p),(78Zn,pγ)

General Comments:

1981Ru07: 79Zn produced by chemical, thermochromatographic technique and mass separation of fission fragments

1991Kr15: from mass separation of fragments from 238U(p,X) E=600 MeV

1997Hu09: 238U(p,F) at 25 MeV

Isomerism in 79Zn is expected but no evidence found by 1986Ek01

2010Ho12: 9Be(86Kr,X) E=140 MeV/nucleon; fully-ionized 86Kr beam, A1900 fragment separator at NSCL facility using Bρ-ΔE-Bρ method. After separation, the mixed beam was implanted into the NSCL β-counting system (BCS) consisting of stacks of Si PIN detectors, a double-sided Si strip detector (DSSD) for implantation of ions, and six single-sided Si strip detectors (SSSD) followed by two Si PIN diodes. The identification of each implanted event was made from energy loss, time-of-flight information and magnetic rigidity. The implantation detector measured time and position of ion implantations and β decays. Neutrons were detected with NERO detector. Measured β- and βn-correlated events with ion implants; half-life of 79Zn and delayed-neutron emission probability.

2016Ya02: measured hyperfine structure by collinear laser spectroscopy at ISOLDE-CERN. Deduced spins of ground state and isomer, half-life of isomer, hyperfine structure constants, magnetic and quadrupole moment, isomer shift, configurations

Mass measurements: 2008Ba54, 2008Ha23

80Cu is a potential beta-delayed neutron emitter to 79Zn daughter nucleus. α preliminary measured value of %β-n=58 9 for 80Cu is given by 2014XuZZ, but no decay scheme is known

Nuclear structure calculations: 2015Ka46, 2012Si08: calculated levels, J, π, shell-model in a large model space

Q-value: Estimated uncertainty=300 for Q(α) (2012Wa38)

Q-value: S(2n)=10785.7 30, S(2p)=31260 500 (syst), Q(β-n)=2202.3 29 (2012Wa38)









E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		M(γ)Final Levels
      0.0AB 9/2+ 0.746 s 42 
% β- = 100
% β-n = 1.7 5
    
    983 3  B 5/2+      983 3 

      0.0
9/2+
    110E1 15  B 1/2+ ≥ 200 ms
% IT = ?
% β- = ?
    
   1336 1  B (1/2,3/2)      236 1 
(D)
    110E1
1/2+
   1424 4  B 3/2+,5/2+      441 1 

    983
5/2+
   2312 4 ? B      888 3 ?

   1424
3/2+,5/2+
   2521 3  B     1185 3 

   1336
(1/2,3/2)
   3195 4  B     1859 4 

   1336
(1/2,3/2)
   3198 6 ? B     1774 4 ?

   1424
3/2+,5/2+
   3304 5 ? B     2321 4 ?

    983
5/2+

E(level): From Eγ data

Jπ(level): As proposed by 2015Or01 based on γ-gated proton angular distributions, DWBA analysis and shell-model predictions, unless otherwise stated

Back to top

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      0.09/2+ 0.746 s 42 
% β- = 100
% β-n = 1.7 5
μ=-1.1866 10 (2016Ya02), Q=+0.487 53 (2016Ya02)
%β-n is unweighted average of 2.2 14 (2010Ho12 from 2109 implants and 19 correlated βn coincidence events), and 1.3 4 (1991Kr15).
E(level): %β-n is unweighted average of 2.2 14 (2010Ho12 from 2109 implants and 19 correlated βn coincidence events), and 1.3 4 (1991Kr15).
    110E11/2+ ≥ 200 ms
% IT = ?
% β- = ?
μ=-1.0180 12 (2016Ya02)
Proposed configuration=ν(3s1/21g9/2-2) with some mixing of ν(1g9/2-22d3/21) configuration, a 2H-1p intruder configuration (2016Ya02). Authors note that muti-particle-multi-hole such as 4H-3p configurations cannot be excluded as these can also give a magnetic moment in agreement with the experimental value.
   1336(1/2,3/2)   E(level): Uncertainty is relative with respect to the uncertainty in Eγ from this level, assuming fixed energy of 1100 keV for the (1/2+) isomer. Absolute uncertainty is 150 keV as for 1100 level.
   2521   E(level): Uncertainty is relative with respect to the uncertainty in Eγ from this level, assuming fixed energy of 1100 keV for the (1/2+) isomer. Absolute uncertainty is 150 keV as for 1100 level.
   3195   E(level): Uncertainty is relative with respect to the uncertainty in Eγ from this level, assuming fixed energy of 1100 keV for the (1/2+) isomer. Absolute uncertainty is 150 keV as for 1100 level.

Back to top