ADOPTED LEVELS, GAMMAS for 99Nb

Authors: E. Browne, J. K. Tuli |  Citation: Nucl. Data Sheets 145, 25 (2017) |  Cutoff date: 1-Jul-2017 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=3635 keV 12S(n)= 6882 keV 13S(p)= 8338 keV 15Q(α)= -3551 keV 14
Reference: 2017WA10

References:
  A  99Zr β- decay  B  99Nb IT decay (2.5 M)
  C  100Mo(d,3He)  D  100Mo(pol t,α)








E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0ABCD 9/2+ 15.0 s 2 
% β- = 100
     
   365.27 8 ABCD 1/2- 2.5 m 2 
% β- > 96.2
% IT < 3.8
   365.1
  100
[M4]
     0.0
9/2+
   387.38 7 A    (7/2+) 12 ps 5     387.42 10 
  100
[M1]
     0.0
9/2+
   469.139 13 A  D (5/2)+ 0.175 ns 5      81.8 1 
   469.137 13 
    5.5 8 
  100 8 
[M1+E2]
E2
   387.38
     0.0
(7/2+)
9/2+
   544.23 8 A CD 3/2- 51 ps 13      74.3 4 
   178.984 12 
    0.20 11 
  100 16 
[E1]
[M1+E2]
   469.139
   365.27
(5/2)+
1/2-
   630.70 22 A  D 5/2-       86.7 3 
  100
[M1+E2]
   544.23
3/2-
   765.05 18 A  D 3/2+      220.9 2 
  100
[E1]
   544.23
3/2-
   816.73 14 A CD 5/2+      347.5 3 
   429.3 3 
   816.7 3 
   21 3 
  100 21 
   32 11 
[M1+E2]
[M1+E2]
[E2]
   469.139
   387.38
     0.0
(5/2)+
(7/2+)
9/2+
   930.91 9 A  D (3/2+) < 10 ps    114.2 2 
   165.6 3 ?
   386.5 3 
   461.8 2 
   543.6 4 
    1.6 4 
    0.05 5 
    0.55 15 
  100 5 
    6.3 9 



M1+E2

   816.73
   765.05
   544.23
   469.139
   387.38
5/2+
3/2+
3/2-
(5/2)+
(7/2+)
   959.31 8 A    (1/2+,3/2+) < 10 ps     28.4 1 
   415.093 13 
   490.2 3 
   593.994 18 
    0.79 23 
   17.2 15 
    2.0 4 
  100 3 
(M1)



   930.91
   544.23
   469.139
   365.27
(3/2+)
3/2-
(5/2)+
1/2-
   970 10   CD 1/2-,3/2-        
  1015.27 4 A  D (3/2)+ < 12 ps     55.9 1 
    84.4 2 
   198.0 5 
   250.4 3 
   384.8 3 
   471.1 3 
   546.13 3 
   627.9 9 
   650.0 2 
    4.4 8 
    0.18 4 
    0.068 23 
    0.046 12 
    0.068 23 
    0.14 5 
  100.0 23 
    4.2 6 
    4.7 10 
[M1]





M1+(E2)


   959.31
   930.91
   816.73
   765.05
   630.70
   544.23
   469.139
   387.38
   365.27
(1/2+,3/2+)
(3/2+)
5/2+
3/2+
5/2-
3/2-
(5/2)+
(7/2+)
1/2-
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  1044.33 20 A         113.4 4 
   499.9 3 
   575.4 3 
    3.8 13 
    3.8 13 
  100 25 



   930.91
   544.23
   469.139
(3/2+)
3/2-
(5/2)+
  1264 9   CD 3/2-        
  1305 12    D        
  1408 9   CD 5/2-,7/2-        
  1543 12    D        
  1579 8   CD 5/2-,7/2-        
  1703 15    D        
  1759 13   CD (3/2)-        
  1831 20    D        
  1921 20    D        
  1974.5 4 A CD < 5 ns    960.0 8 
  1043.4 4 
  100 20 
   30 7 


  1015.27
   930.91
(3/2)+
(3/2+)
  2336.3 3 A        1321.0 3 
  100

  1015.27
(3/2)+

E(level): Level energies with ΔE<1 keV have been deduced from a least-squares fit to adopted gammas; the others are from (pol t,α) or weighted averages of (pol t,α) and (d,3He).

T1/2(level): From γγ(t) by 2013RuZX using induced-fission on 235U, except where noted otherwise.

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Additional Gamma Data:















E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
   365.27 1/2- 2.5 m 2 
% β- > 96.2
% IT < 3.8
   365.1[M4] 0.372α=0.372, α(K)=0.311 5, α(L)=0.0505 7, α(M)=0.00916 13, α(N)=0.001307 19, α(O)=6.26×10-5 9
   387.38 (7/2+) 12 ps 5     387.42 10 [M1] 0.00649B(M1)(W.u.)=0.031 13, α=0.00649, α(K)=0.00571 8, α(L)=0.000646 9, α(M)=0.0001138 16, α(N)=1.667×10-5 24, α(O)=9.68E-7 14
   469.139 (5/2)+ 0.175 ns 5      81.8 1 [M1+E2] 1.4α=1.4 10, α(K)=1.13 78, α(L)=0.22 19, α(M)=0.040 33, α(N)=0.0054 44, α(O)=1.58×10-4 99
(5/2)+ 0.175 ns 5     469.137 13 E2 0.00540B(E2)(W.u.)=4.6 6, α=0.00540, α(K)=0.00473 7, α(L)=0.000563 8, α(M)=9.92E-5 14, α(N)=1.433E-5 20, α(O)=7.65E-7 11
   544.23 3/2- 51 ps 13      74.3 4 [E1] 0.284B(E1)(W.u.)=2.8E-5 18, α=0.284 6, α(K)=0.249 6, α(L)=0.0290 7, α(M)=0.00505 11, α(N)=0.000720 16, α(O)=3.59E-5 8
3/2- 51 ps 13     178.984 12 [M1+E2] 0.093α=0.093 48, α(K)=0.080 40, α(L)=0.0109 62, α(M)=0.0019 11, α(N)=2.7×10-4 15, α(O)=1.25E-5 55
   630.70 5/2-       86.7 3 [M1+E2] 1.14α=1.14 81, α(K)=0.93 64, α(L)=0.18 15, α(M)=0.032 26, α(N)=0.0043 34, α(O)=1.31×10-4 81
   765.05 3/2+      220.9 2 [E1] 0.01210α=0.01210, α(K)=0.01066 16, α(L)=0.001196 17, α(M)=0.000210 3, α(N)=3.04×10-5 5, α(O)=1.682E-6 24
   816.73 5/2+      347.5 3 [M1+E2] 0.011α=0.011 3, α(K)=0.0098 24, α(L)=0.00118 33, α(M)=2.07×10-4 59, α(N)=3.00E-5 82, α(O)=1.6E-6 4
5/2+      429.3 3 [M1+E2] 0.0061α=0.0061 11, α(K)=0.0053 9, α(L)=0.00062 13, α(M)=0.000110 22, α(N)=1.6×10-5 3, α(O)=8.8E-7 13
5/2+      816.7 3 [E2] 1.17×10-3α=1.17×10-3, α(K)=0.001028 15, α(L)=0.0001168 17, α(M)=2.06E-5 3, α(N)=3.00E-6 5, α(O)=1.695E-7 24
   930.91 (3/2+) < 10 ps    461.8 2 M1+E21 GT0.0053B(E2)(W.u.)>45, α=0.0053 4, α(K)=0.0047 4, α(L)=0.00055 5, α(M)=9.7E-5 8, α(N)=1.40E-5 11, α(O)=7.6E-7 5
   959.31 (1/2+,3/2+) < 10 ps     28.4 1 (M1) 8.50B(M1)(W.u.)>0.59, α=8.50 15, α(K)=7.43 13, α(L)=0.892 16, α(M)=0.158 3, α(N)=0.0229 4, α(O)=0.001276 23
  1015.27 (3/2)+ < 12 ps     55.9 1 [M1] 1.177B(M1)(W.u.)>0.38, α=1.177, α(K)=1.029 16, α(L)=0.1224 19, α(M)=0.0216 4, α(N)=0.00315 5, α(O)=0.000177 3
(3/2)+ < 12 ps    546.13 3 M1+(E2)-0.4 LT0.00290B(M1)(W.u.)>0.0081, α=0.00290 6, α(K)=0.00255 5, α(L)=0.000287 7, α(M)=5.06×10-5 12, α(N)=7.41E-6 16, α(O)=4.30E-7 8

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.09/2+ 15.0 s 2 
% β- = 100
μ=+5.97 3, Q=0.42 14
Isotope shift Δ<r2>=+1.028 fm2 12 (2009Ch25).
   544.233/2- 51 ps 13  XREF: C(562).
   9701/2-,3/2-   XREF: d(983).
  12643/2-   XREF: C(1271)d(1253).
  15795/2-,7/2-   XREF: C(1573).
  1759(3/2)-   XREF: C(1746)d(1771).
  1974.5 < 5 ns XREF: C(1967)d(1982).

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Additional Gamma Comments:

E(level)E(gamma)Comments
   959.31    28.4M(γ): From γ-ray intensity balance at 930.88 level α(28.4γ)|<5.9, and a comparison with theoretical α(E2)=1084 and α(M1)=8.50.
  1015.27   650.0E(γ): placed by the evaluators
  1974.5   960.0E(γ): from measurement at JOSEF (1979Se01)

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