ADOPTED LEVELS, GAMMAS for 77Zn

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-)=7203 keV 3S(n)= 4557.5 keV 25S(p)= 15102 keV 7Q(α)= -11106 keV 3
Reference: 2017WA10

References:
  A  77Cu β- decay (469.8 MS)  B  77Zn IT decay (1.05 S)
  C  78Cu β-n decay (331.7 MS) 

General Comments:

1970OsZZ, 1977Al17: 77Zn isotope identified and produced in 235U(n,F) at OSIRIS facility, and subsequent counting of β and γ spectra.

2017Wr01: E(p)=1.4 GeV incident on UCx target at ISOLDE-CERN facility. The 77Zn nuclei were resonantly ionized using a resonant laser-ion source, accelerated to 30 keV, and separated by high-resolution separator. The ions were cooled using a gas-filled radio-frequency quadrupole (RFQ-ISCOOL). Measured hyperfine spectra using collinear laser spectroscopy using COLLAPS setup at ISOLDE-CERN. Deduced spins, μ, Q, isomer. Comparison with large-scale shell model calculations. For the calibration of nuclear moments, μ=+0.875479 9 from literature and Q=+0.122 10 (2017Wr01) for the stable 67Zn nuclide were used as references. See also 2017Ne04 review article.

2019Xi07: measured isotope shifts and charge radii using laser spectroscopy at ISOLDE-CERN

Mass measurement: 2008Ba54: Penning trap mass spectrometer ISOLTRAP

Additional neutron-decaying levels above S(n) are expected to be populated with allowed β transitions from 77Cu decay (2009Pa35)

Theoretical calculations: consult the NSR database at www.nndc.bnl.gov for 10 primary theory references dealing with nuclear structure calculations, and radioactive decays.

Q-value: S(2n)=12372.9 28, S(2p)=29340 300 (syst) (2017Wa10)

Q-value: Measured mass excess for 77Ga=-65995.0 keV 42 (2019Hu15), as compared to -65992.3 keV 24 in 2017Wa10 leads to Q(β-)=7205.8 keV 47










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0.0ABC 7/2+ 2.08 s 5 
% β- = 100
     
   114.721 10 A C (9/2+)      114.72 1 
  100
[M1+E2]
     0.0
7/2+
   772.440 15 AB  1/2- 1.05 s 10 
% IT = 34 7
% β- = 66 7
   772.43 2 
  100
[E3]
     0.0
7/2+
   801.89 11 A C (11/2+)      687.17 11 
  100

   114.721
(9/2+)
  1130.5 3 A       1015.8 3 
  100

   114.721
(9/2+)
  1235.1 5 A       1120.4 5 
  100

   114.721
(9/2+)
  1277.690 15 A   (5/2-,3/2+)      505.25 1 
  1277.68 2 
  100.0 7 
   37.3 8 


   772.440
     0.0
1/2-
7/2+
  1284.62 15 A       1169.81 16 
  1284.8 5 
   32 4 
  100 6 


   114.721
     0.0
(9/2+)
7/2+
  1363.786 25 A   (1/2+,3/2-)      591.33 2 
  100

   772.440
1/2-
  1409.078 20 A        131.35 22 
  1409.07 2 
    4.0 7 
  100 3 


  1277.690
     0.0
(5/2-,3/2+)
7/2+
  1427.3 3 A       1427.7 6 
  100

     0.0
7/2+
  1637.48 21 A        352.86 15 
  100

  1284.62

  1875.66 11 A        466.88 25 
  1875.86 17 
   55 15 
  100 13 


  1409.078
     0.0

7/2+
  2082.81 4 A        805.11 3 
  100

  1277.690
(5/2-,3/2+)
  2152.6 23 A       2037.9 23 
  100

   114.721
(9/2+)
  2235.378 24 A   (5/2+)      826.33 18 
   871.45 9 
   957.69 2 
  2118.8 4 
  2234.3 4 
    4.7 8 
   17.4 17 
  100.0 22 
    5.5 14 
    3.6 11 





  1409.078
  1363.786
  1277.690
   114.721
     0.0

(1/2+,3/2-)
(5/2-,3/2+)
(9/2+)
7/2+
  2380.4 3 A       2265.6 3 
  100

   114.721
(9/2+)
  2527.2 5 ?A       2527.2 5 
  100

     0.0
7/2+
  2545.84 12 A       1268.14 12 
  100

  1277.690
(5/2-,3/2+)
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  2574.2 4 ?A       2459.4 4 ?
 

   114.721
(9/2+)
  2654.14 9 A       1290.34 8 
  100

  1363.786
(1/2+,3/2-)
  2872.67 5 A        637.29 5 
   997.29 15 
  1463.69 14 
  1594.8 1 
  2757.9 5 
  100 8 
   41 6 
   53 7 
   97 10 
   18 6 





  2235.378
  1875.66
  1409.078
  1277.690
   114.721
(5/2+)


(5/2-,3/2+)
(9/2+)
  2891.8 3 ?A       1528.0 3 ?
 

  1363.786
(1/2+,3/2-)
  3001.12 10 A       1723.41 9 
  100

  1277.690
(5/2-,3/2+)
  3083.18 9 A       1000.33 14 
  1805.5 1 
  2967.6 7 
   47 7 
  100 8 
   14 6 



  2082.81
  1277.690
   114.721

(5/2-,3/2+)
(9/2+)
  3095.1 5 ?A       1817.4 5 ?
 

  1277.690
(5/2-,3/2+)
  3139.30 15 A        903.8 14 
  1056.6 3 
  1730.18 18 
  3139.1 6 
   89 16 
   54 11 
  100 16 
   59 16 




  2235.378
  2082.81
  1409.078
     0.0
(5/2+)


7/2+
  3204.56 5 A       1840.15 21 
  1926.87 4 
   21 3 
  100 3 


  1363.786
  1277.690
(1/2+,3/2-)
(5/2-,3/2+)
  3386.92 13 A       2023.04 14 
  2109.4 3 
  3387.2 6 
  100 10 
   65 10 
   25 6 



  1363.786
  1277.690
     0.0
(1/2+,3/2-)
(5/2-,3/2+)
7/2+
  3426.98 13 A       2017.8 4 
  2141.7 5 
  2149.32 14 
   28 8 
   23 8 
  100 11 



  1409.078
  1284.62
  1277.690


(5/2-,3/2+)
  3709.9 15 A       2432.2 15 
  100

  1277.690
(5/2-,3/2+)
  3744.00 9 A       1661.16 9 
  2335.1 3 
  2466.6 7 
  3743.6 4 
  100 14 
   18 6 
   12 4 
   21 5 




  2082.81
  1409.078
  1277.690
     0.0


(5/2-,3/2+)
7/2+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  3823.88 16 A       2396.6 3 
  2546.12 16 
  3826.7 10 ?
   47 7 
  100 8 
   39 13 



  1427.3
  1277.690
     0.0

(5/2-,3/2+)
7/2+
  4334.35 20 A       4220.5 16 
  4334.2 2 
    9 5 
  100 11 


   114.721
     0.0
(9/2+)
7/2+
  4531.9 4 A       4417.0 4 
  100

   114.721
(9/2+)
  4605.27 21 A       3178.0 6 
  4490.37 23 
  4605.3 6 
   41 9 
  100 13 
   30 7 



  1427.3
   114.721
     0.0

(9/2+)
7/2+

Back to top

Back to top

Additional Gamma Data:















E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityMixing
Ratio
Conversion
Coefficient
Additional Data
   114.721 (9/2+)      114.72 1 [M1+E2]0.10 30.046α=0.046 2
   772.440 1/2- 1.05 s 10 
% IT = 34 7
% β- = 66 7
   772.43 2 [E3] 0.00133B(E3)(W.u.)=6.8E-6 16, α=0.00133

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.07/2+ 2.08 s 5 
% β- = 100
μ=-0.9067 1 (2017Wr01,2019StZV), Q=+0.48 4 (2017Wr01)
Measured isotope shift δν(68Zn,77Zn)=236.0 MHz 16(stat) 120(syst) (2019Xi07, laser spectroscopy at ISOLDE-CERN).
   114.721(9/2+)   XREF: C(?).
   772.4401/2- 1.05 s 10 
% IT = 34 7
% β- = 66 7
μ=+0.562 2 (2017Wr01,2019StZV)
Measured isotope shift δν(68Zn,77Zn)=241.2 MHz 38(stat) 120(syst) (2019Xi07, laser spectroscopy at ISOLDE-CERN).
   801.89(11/2+)   XREF: C(?).

Back to top

Additional Gamma Comments:

E(level)E(gamma)Comments
   772.440   772.43M(γ): the multipolarity may be E3, as suggested by the assigned Jπ values. Deduced B(E3)(W.u.) is smaller than any other value for A<90 (1979En04). In the α=80 region, B(E3)(W.u.) for 7/2+ to 1/2- range from 0.0362 6 for 77Se to 0.00071 4 for 81Se
   801.89   687.17E(γ): it is assumed that 685.5γ in 2009Pa35 is the same as 688.7γ in 78Cu β-n decay data of 2005Va19 and 687.17 in 77Cu β- of 2009Il01
  2235.378  2118.8E(γ): poor fit, not included in the least-squares fitting procedure. Level-energy difference=2120.6

Back to top