ADOPTED LEVELS, GAMMAS for 97Nb

Author: N. Nica |  Citation: Nucl. Data Sheets 111, 525 (2010) |  Cutoff date: 19-Nov-2009 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=1935.5 keV 18S(n)= 8073 keV 4S(p)= 7452.5 keV 18Q(α)= -3805 keV 11
Reference: 2012WA38

References:
  A  97Zr β- decay  B  97Nb IT decay (58.7 S)
  C  96Zr(3He,d),(d,n)  D  96Zr(3He,d) IAS
  E  98Mo(d,3He)  F  98Mo(pol t,α)

General Comments:

2005Be17: cluster decay T1/2 lower limits

Gammas: All γ data are from 97Zr β- decay

Q-value: Note: Current evaluation has used the following Q record










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
      0.0ABC EF 9/2+ 72.1 m 7 
% β- = 100
     
    743.35 3 ABC EF 1/2- 58.7 s 18 
% IT = 100
   743.36 3 
  100
[M4]
      0.0
9/2+
   1147.96 6 A      7/2+ ≤ 0.15 ns   1147.97 8 
  100
M1+E2
      0.0
9/2+
   1160 10      F 9/2+        
   1251.01 7 A C EF 3/2-      507.64 8 
  100

    743.35
1/2-
   1276.09 7 A C    5/2+     1276.07 9 
  100
[E2]
      0.0
9/2+
   1433.92 13 A C EF 5/2-      182.9 5 
   690.52 16 
   17 4 
  100 10 

[E2]
   1251.01
    743.35
3/2-
1/2-
   1548.36 11 A      (3/2+,5/2-)      272.40 16 
   297.2 3 
   400.42 16 
   95 11 
   27 5 
  100 6 



   1276.09
   1251.01
   1147.96
5/2+
3/2-
7/2+
   1554 15   C    1/2-,3/2-        
   1652.82 21 A           218.9 2 
  100

   1433.92
5/2-
   1750.43 9 A C E  5/2+ ≤ 0.2 ns    202.5 6 
   473.5 6 
   602.37 14 
  1750.24 22 
    2.1 6 
    5.4 27 
  100 5 
   79 7 
D,E2
D,E2
M1+E2
[E2]
   1548.36
   1276.09
   1147.96
      0.0
(3/2+,5/2-)
5/2+
7/2+
9/2+
   1764.42 14 A C EF (3/2-)      111.6 3 
   330.43 19 
   513.41 18 
  1021.2 3 
    6.4 9 
   14.1 15 
   54 5 
  100 16 




   1652.82
   1433.92
   1251.01
    743.35

5/2-
3/2-
1/2-
   1851.71 6 A C    5/2+ ≤ 0.2 ns    305.1 9 
   600.6 6 
   703.76 5 
  1851.61 9 
    3 2 
  <18
  100 5 
   30 3 
D,E2
[E1]
M1+E2
[E2]
   1548.36
   1251.01
   1147.96
      0.0
(3/2+,5/2-)
3/2-
7/2+
9/2+
   1945 15   C    7/2+,9/2+        
   1958.4 6 A           707.4 6 
  100

   1251.01
3/2-
   2047 10   C  F (3/2-)        
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   2092 15   C E  3/2+,5/2+        
   2105.91 6 A C E  (3/2+) ≤ 0.2 ns    254.17 14 
   355.40 9 
   558 1 
   829.79 9 
   854.89 8 
  1362.68 9 
   55 4 
  100 4 
    1.3 9 
   11.4 8 
   17.0 11 
   49 5 
M1+E2
M1+E2


(E1)
[E1]
   1851.71
   1750.43
   1548.36
   1276.09
   1251.01
    743.35
5/2+
5/2+
(3/2+,5/2-)
5/2+
3/2-
1/2-
   2113 10   C EF 5/2-        
   2247.46 15 A   EF 3/2-      699.2 3 
   971.34 15 
   36 7 
  100 6 

[E1]
   1548.36
   1276.09
(3/2+,5/2-)
5/2+
   2357 15   C    (1/2+)        
   2388 10     EF (3/2-)        
   2525 15   C    3/2+,5/2+        
   2541 10      F (5/2-)        
   2550 20     E  1/2-,3/2-        
   2654 10      F        
   2676 15   C    3/2+,5/2+        
   2702 15   C    3/2+,5/2+        
   2727 15   C    3/2+,5/2+        
   2748 15   C    (3/2+,5/2+)        
   2792 15   C    (1/2+)        
   2948 15     EF        
   2981 15   C    (1/2+)        
   3067 15   C    (3/2+,5/2+)        
   3212 15   C    (3/2+,5/2+)        
   3326 15   C    (1/2-,3/2-)        
   3362 15   C    3/2+,5/2+        
   3418 15   C    3/2+,5/2+        
   3486 15   C    (3/2+,5/2+)        
   3518 15   C    3/2+,5/2+        
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   3537 15   C    (3/2+,5/2+)        
   3586 15   C    3/2+,5/2+        
   3643 15   C    3/2+,5/2+        
   3759 15   C    (5/2-,7/2-)        
   3799 15   C    (3/2+,5/2+)        
   3862 15   C    3/2+,5/2+        
   3945 15   C    3/2+,5/2+        
   4038 15   C    3/2+,5/2+        
   4080 20   C           
   4200 20   C           
   4350 20   C           
   4530 20   C           
   4660 20   C           
   4780 20   C           
   4880 20   C           
   4960 20   C           
   5220 20   C           
   5330 20   C           
   5460 20   C           
   5630 20   C           
  14430 30    D   (3/2+)        
  14650 30    D   (7/2+)        
  15640 30    D   (11/2-)        

E(level): From least squares fit to Eγ in 97Zr β- decay, where possible. Otherwise, from the reactions indicated in XREF column.

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Additional Gamma Data:















E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityMixing
Ratio
Conversion
Coefficient
Additional Data
    743.35 1/2- 58.7 s 18 
% IT = 100
   743.36 3 [M4] 0.0210B(M4)(W.u.)=6.03 21, α=0.0210, α(K)=0.0181 3, α(L)=0.00237 4, α(M)=0.000423 6, α(N)=6.14×10-5 9, α(O)=3.32E-6 5, α(N+)=6.47E-5 9
   1147.96 7/2+ ≤ 0.15 ns   1147.97 8 M1+E2+0.5 25.47×10-4B(E2)(W.u.)>0.0051, B(M1)(W.u.)>6.5E-5, α=5.47E-4, α(K)=0.000481 8, α(L)=5.31E-5 8, α(M)=9.34E-6 14, α(N)=1.371E-6 20, α(O)=8.05E-8 13, α(N+)=3.56E-6 9
   1276.09 5/2+     1276.07 9 [E2] 4.43×10-4α=4.43×10-4, α(K)=0.000372 6, α(L)=4.13E-5 6, α(M)=7.26E-6 11, α(N)=1.064E-6 15, α(O)=6.17E-8 9, α(N+)=2.25E-5 4
   1433.92 5/2-      690.52 16 [E2] 0.00180α=0.00180, α(K)=0.001579 23, α(L)=0.000182 3, α(M)=3.20×10-5 5, α(N)=4.65E-6 7, α(O)=2.59E-7 4, α(N+)=4.91E-6 7
   1750.43 5/2+ ≤ 0.2 ns    602.37 14 M1+E2+0.11 60.00228B(M1)(W.u.)>0.00026, α=0.00228, α(K)=0.00201 3, α(L)=0.000225 4, α(M)=3.96×10-5 6, α(N)=5.80E-6 9, α(O)=3.39E-7 5, α(N+)=6.14E-6 9
5/2+ ≤ 0.2 ns   1750.24 22 [E2] 4.13×10-4B(E2)(W.u.)>0.0028, α=4.13E-4, α(K)=0.000198 3, α(L)=2.18E-5 3, α(M)=3.83E-6 6, α(N)=5.61E-7 8, α(O)=3.29E-8 5, α(N+)=0.000190 3
   1851.71 5/2+ ≤ 0.2 ns    600.6 6 [E1] 9.01×10-4B(E1)(W.u.)>4.7E-7, α=9.01E-4, α(K)=0.000795 12, α(L)=8.79E-5 13, α(M)=1.543E-5 22, α(N)=2.26E-6 4, α(O)=1.300E-7 19, α(N+)=2.39E-6 4
5/2+ ≤ 0.2 ns    703.76 5 M1+E2+0.19 81.60×10-3B(E2)(W.u.)>0.0028, B(M1)(W.u.)>0.00021, α=1.60E-3, α(K)=0.001410 20, α(L)=0.0001572 23, α(M)=2.77E-5 4, α(N)=4.06E-6 6, α(O)=2.37E-7 4, α(N+)=4.30E-6 7
5/2+ ≤ 0.2 ns   1851.61 9 [E2] 4.37×10-4B(E2)(W.u.)>0.0010, α=4.37E-4, α(K)=0.0001783 25, α(L)=1.95E-5 3, α(M)=3.43E-6 5, α(N)=5.04E-7 7, α(O)=2.96E-8 5, α(N+)=0.000236 4
   2105.91 (3/2+) ≤ 0.2 ns    254.17 14 M1+E2 0.030α=0.030 11, α(K)=0.026 10, α(L)=0.0032 14, α(M)=0.00057 24, α(N)=8.E-5 4, α(O)=4.1E-6 14, α(N+)=9.E-5 4
(3/2+) ≤ 0.2 ns    355.40 9 M1+E2 0.011α=0.011 3, α(K)=0.0092 22, α(L)=0.0011 3, α(M)=0.00019 6, α(N)=2.8×10-5 8, α(O)=1.5E-6 3, α(N+)=2.9E-5 8
(3/2+) ≤ 0.2 ns    854.89 8 (E1) 4.21×10-4B(E1)(W.u.)>1.8E-7, α=4.21E-4, α(K)=0.000372 6, α(L)=4.08E-5 6, α(M)=7.17E-6 10, α(N)=1.050E-6 15, α(O)=6.11E-8 9, α(N+)=1.111E-6 16
(3/2+) ≤ 0.2 ns   1362.68 9 [E1] 3.22×10-4B(E1)(W.u.)>1.3E-7, α=3.22E-4, α(K)=0.0001559 22, α(L)=1.698E-5 24, α(M)=2.98E-6 5, α(N)=4.37E-7 7, α(O)=2.57E-8 4, α(N+)=0.0001461 21
   2247.46 3/2-      971.34 15 [E1] 3.27×10-4α=3.27×10-4, α(K)=0.000289 4, α(L)=3.16E-5 5, α(M)=5.56E-6 8, α(N)=8.14E-7 12, α(O)=4.75E-8 7, α(N+)=8.62E-7 12

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      0.09/2+ 72.1 m 7 
% β- = 100
μ=6.153 5
Oblate deformation deduced from μ (1991Be18).
   1147.967/2+ ≤ 0.15 ns E(level): It has been suggested that the 1147.96- and 1160-keV levels are one and the same level. However, the level seen in 97Zr β- decay cannot have a J>7/2 (nor J<7/2) unless there is something very seriously wrong with the proposed decay scheme. At the same time, σ(θ) and y in 98Mo(pol t,α) duplicate the data for 9/2+ g.s. indicating a 9/2+, not a 7/2+ level.
T1/2(level): From γγ(t) in 97Zr β- decay.
   11609/2+   E(level): It has been suggested that the 1147.96- and 1160-keV levels are one and the same level. However, the level seen in 97Zr β- decay cannot have a J>7/2 (nor J<7/2) unless there is something very seriously wrong with the proposed decay scheme. At the same time, σ(θ) and y in 98Mo(pol t,α) duplicate the data for 9/2+ g.s. indicating a 9/2+, not a 7/2+ level.
   1750.435/2+ ≤ 0.2 ns XREF: C(1754).
E(level): Level at 1764 in (d,3He) data set is a doublet with L=1 + L=2.
T1/2(level): From γγ(t) in 97Zr β- decay.
   1764.42(3/2-)   XREF: C(1776)F(1761).
E(level): Level at 1764 in (d,3He) data set is a doublet with L=1 + L=2.
   1851.715/2+ ≤ 0.2 ns XREF: C(1856).
T1/2(level): From γγ(t) in 97Zr β- decay.
   20923/2+,5/2+   E(level): Level at 2090 in (d,3He) data set is a doublet with L=2 + L=3.
   2105.91(3/2+) ≤ 0.2 ns XREF: C(2114).
E(level): Level at 2090 in (d,3He) data set is a doublet with L=2 + L=3.
T1/2(level): From γγ(t) in 97Zr β- decay.
   21135/2-   E(level): Level at 2090 in (d,3He) data set is a doublet with L=2 + L=3.
   2948   XREF: F(2961).

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Additional Gamma Comments:

E(level)E(gamma)Comments
   1750.43    202.5M(γ): Deduced from RUL
    473.5M(γ): Deduced from RUL
   1851.71    305.1M(γ): Deduced from RUL
   2105.91    854.89M(γ): d,E2 deduced from RUL, level scheme limits mult to E1

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