ADOPTED LEVELS, GAMMAS for 161Tb

Author: C. W. Reich |  Citation: Nucl. Data Sheets 112,2497 (2011) |  Cutoff date: 1-Jun-2011 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=593.7 keV 14S(n)= 7696.6 keV 6S(p)= 6808.9 keV 11Q(α)= -427 keV 5
Reference: 2012WA38

References:
  A  160Gd(p,p) IAR  B  161Gd β- decay
  C  160Gd(3He,d),160Gd(α,t)  D  162Dy(t,α)

General Comments:

The data adopted here are from the 161Gd β- decay and the 160Gd(3He,d), 160Gd(α,t), and 162Dy(t,α) reactions.

For calculations of the wave functions for some of these levels, see 1972So12 or 1973Ga29 and 1970WeZS. For a discussion of the band assignments, see 1975Ni03.

The contributions of Nilsson states and vibrations to the various bandheads have been calculated by 1970WeZS, 1971SoZW, 1972So12, 1973Ga29, and 1983So01. The last four articles have some authors in common and similar results. These contributions are greater than 90% for the 3/2+[411], 5/2+[413], and 5/2-[532] bandheads. For spins of 7/2 and greater, the 7/2-[523] and 5/2-[532] bands are mixed, with the main contributions being 63% to 73% in the 7/2- levels and less at 9/2-. For the 1/2+[411] bandhead, the various calculations give a 54% to 73% contribution from the Nilsson state and 24% to 35% contribution from a vibrational state based on the 3/2+[411] ground state. For the 5/2+[402] band, the calculations give a 65% contribution from the Nilsson state and 11% and 12% from two vibrational states. 1970WeZS also give the calculated contributions for the first one or two rotational states in these bands.

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

Q-value: Values are essentially the same as those of 2003Au03.










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
      0.0 BCD 3/2+ 6.89 d 2 
% β- = 100
     
     56.289 9  BCD 5/2+       56.290 12 
   100
M1
      0.0
3/2+
    133.681 11  BCD 7/2+       77.393 10 
   133.68 2 
   100 9 
    15 2 
M1+E2

     56.289
      0.0
5/2+
3/2+
    230.72 7  BCD 9/2+       97.04 7 
   100

    133.681
7/2+
    314.914 11  BCD 5/2+      181.232 12 
   258.62 3 
   314.92 2 
     3.3 1 
     4.3 2 
   100 4 
M1+E2
M1+E2
M1+E2
    133.681
     56.289
      0.0
7/2+
5/2+
3/2+
    394.364 17  BCD 7/2+       79.41 4 
   338.07 2 
   394.34 6 
     3.5 6 
   100 6 
    13 1 

M1+E2

    314.914
     56.289
      0.0
5/2+
5/2+
3/2+
    417.228 13  BCD 7/2- 0.88 ns 2     102.315 10 
   283.55 3 
   360.94 2 
   417.0 4 
    23.1 13 
     9.9 4 
   100 2 
     0.51 7 
E1
E1
E1
[M2]
    314.914
    133.681
     56.289
      0.0
5/2+
7/2+
5/2+
3/2+
    480.130 12  B D 5/2- < 0.1 ns     62.910 25 
    85.79 7 
   165.213 15 
   423.86 7 
   480.12 2 
     2.2 7 
     5.6 11 
    96 7 
     6.7 11 
   100 6 
[M1+E2]
[E1]
E1
[E1]
[E1]
    417.228
    394.364
    314.914
     56.289
      0.0
7/2-
7/2+
5/2+
5/2+
3/2+
    488.78 3  BCD 9/2-       71.57 3 
   100

    417.228
7/2-
    499  CD 9/2+        
    520 3   CD 1/2+        
    558 3   CD 3/2+        
    584 3   CD 11/2-        
    585.776 15  B D 7/2- < 0.2 ns     97.04 7 
   105.64 2 
   168.47 7 
   191.38 3 
   270.87 5 
   452.2 2 
   529.50 2 
   ≤11.4
    58 8 
     6.5 9 
    50.4 24 
    69 3 
     4.7 8 
   100 6 







    488.78
    480.130
    417.228
    394.364
    314.914
    133.681
     56.289
9/2-
5/2-
7/2-
7/2+
5/2+
7/2+
5/2+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
    602 3   CD 5/2+        
    638 4   C         
    698 3   CD 7/2+        
    707.19 25  B D 9/2-      121.7 3 
   100

    585.776
7/2-
    743 3   C         
    772 5   C         
    847 3   CD 11/2-        
    920 3   CD 1/2-        
    950 3   CD 5/2-        
    980   D 1/2+        
    997 3   CD        
   1020 3   C  3/2-        
   1064 3   C  9/2-        
   1080 3   CD (5/2+)        
   1111 3   CD        
   1130 3   CD        
   1141 4   C         
   1149.88 7  B   (3/2+)      835.0 3 
  1093.52 9 
  1149.94 9 
    ≤9.2
    53 3 
   100 5 



    314.914
     56.289
      0.0
5/2+
5/2+
3/2+
   1178 3   CD 7/2-        
   1209.72 9  BCD     1153.43 12 
  1209.72 11 
    83 11 
   100 8 


     56.289
      0.0
5/2+
3/2+
   1232 3   CD        
   1252.37 6  BCD 5/2+      772.18 10 
   835.0 3 ?
   857.93 11 
   937.53 9 
  1252.42 12 
    39 3 
   ≤12
    22.8 22 
   100 5 
    19.7 13 





    480.130
    417.228
    394.364
    314.914
      0.0
5/2-
7/2-
7/2+
5/2+
3/2+
   1281 2    D        
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   1302 3   C         
   1333   D        
   1349.66 5  BCD      955.35 8 
  1034.72 8 
  1349.60 9 
    28.8 15 
   100 3 
    18.6 11 



    394.364
    314.914
      0.0
7/2+
5/2+
3/2+
   1386 3   CD        
   1404.68 12  BC       818.9 3 
   924.55 12 
   <47
   100 11 


    585.776
    480.130
7/2-
5/2-
   1420.62 7  BC       835.0 3 ?
  1026.25 10 
  1105.84 13 
  1364.19 13 
    32 7 
   100 7 
    48 4 
    42 5 




    585.776
    394.364
    314.914
     56.289
7/2-
7/2+
5/2+
5/2+
   1433 3   C         
   1436 2    D        
   1460.54 10  B        972.3 8 
  1066.22 12 
  1145.50 18 
   <22
   100 10 
    62 14 



    488.78
    394.364
    314.914
9/2-
7/2+
5/2+
   1477.63 11  B       1344.2 4 
  1421.37 15 
  1477.55 15 
   <45
   100 8 
  <164



    133.681
     56.289
      0.0
7/2+
5/2+
3/2+
   1498 3   C         
   1524   D        
   1533.80 9  BC       947.75 24 
  1053.7 3 
  1400.13 12 
  1477.55 15 
  1533.87 15 
    30 3 
   <31
   100 7 
   <83
    79 6 





    585.776
    480.130
    133.681
     56.289
      0.0
7/2-
5/2-
7/2+
5/2+
3/2+
   1537.43 8  B        951.10 22 
  1048.75 12 
  1143.15 12 
  1480.9 3 
    28 3 
    95 10 
   100 10 
    20.0 25 




    585.776
    488.78
    394.364
     56.289
7/2-
9/2-
7/2+
5/2+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   1552.17 12  B D     1063.4 2 
  1135.2 4 
  1495.82 16 
   100 16 
    52 11 
  <122



    488.78
    417.228
     56.289
9/2-
7/2-
5/2+
   1558.18 11  BC      1424.3 2 
  1501.8 2 
  1558.33 15 
    67 5 
    59 5 
   100 8 



    133.681
     56.289
      0.0
7/2+
5/2+
3/2+
   1601.02 7  BC      1015.10 14 
  1112.20 15 
  1120.92 10 
  1286.4 4 
  1544.80 14 
    29 5 
    43 12 
   100 7 
     9.3 17 
    27.6 19 





    585.776
    488.78
    480.130
    314.914
     56.289
7/2-
9/2-
5/2-
5/2+
5/2+
   1623.11 7  B       1228.72 14 
  1308.27 10 
  1489.42 15 
  1567.0 6 
  1622.95 15 
    37 3 
   100 7 
    47 3 
    <5.1
   <77





    394.364
    314.914
    133.681
     56.289
      0.0
7/2+
5/2+
7/2+
5/2+
3/2+
   1655.81 7  B D     1175.82 11 
  1261.11 11 
  1341.10 12 
   100 10 
    98 5 
    83 8 



    480.130
    394.364
    314.914
5/2-
7/2+
5/2+
   1680 3   C         
   1718 8   C         
   1756 3   C         
   1778.19 12  BC      1071.5 4 
  1192.42 15 
  1297.9 2 
  1547.5 5 
   <40
   100 15 
    71 12 
   <29




    707.19
    585.776
    480.130
    230.72
9/2-
7/2-
5/2-
9/2+
   1810.75 12  BC      1224.93 20 
  1495.82 16 
  1677.3 4 
   100 18 
  <159
    50 9 



    585.776
    314.914
    133.681
7/2-
5/2+
7/2+
   1825.2 3  B D     1430.7 6 
  1691.7 4 
  1768.6 5 
   <55
   100 17 
   <90



    394.364
    133.681
     56.289
7/2+
7/2+
5/2+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   1845   D        
   1853.6 3  BC      1373.2 5 
  1459.5 5 
  1538.7 5 
  1622.95 15 
  <137
  <133
   100 25 
  <946




    480.130
    394.364
    314.914
    230.72
5/2-
7/2+
5/2+
9/2+
   1856.95 22  B       1271.8 5 
  1376.7 3 
  1439.5 4 
   <58
   100 15 
    85 12 



    585.776
    480.130
    417.228
7/2-
5/2-
7/2-
   1900   D 11/2-        
   1946   D        
   1979   D        
  17040A    (5/2-)        
  17113A    (7/2-)        
  17353A    (3/2-)        
  17369A    (1/2-)        
  17478A    (5/2-)        
  17569A    (7/2-)        
  17874A    (1/2-,3/2-)        
  17929A    (7/2-)        

E(level): From least-squares fit to γ energies for 161Gd decay and otherwise from reactions.

Jπ(level): Jπ and band assignments are from agreement of calculated cross sections for (3He,d), (α,t), and (t,α) reactions with measured cross sections and intensity patterns and level spacings within bands. Other Jπ arguments are noted explicitly.

Jπ(level): See levels from 161Gd β- decay for possible band assignment for β-vibrational bandheads at 1149 and 1349 keV and 3/2[541] band at 1477 keV.

E(γ): See 161Gd β- decay for unplaced γ’s.

M(γ): From 161Gd β- decay (1976Hn01,1959Sc29). From K| x ray/γ and L1/M ratios for 56γ (1959Sc29,1976Hn01) and α(K)exp for all other γ’s with the γ and ce data scaled to the theoretical M1 value for the 56-keV γ.

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - 3/2[411] band.
      0.0 3/2+ 6.89 d 2 
% β- = 100
     
     56.289 9  5/2+       56.290 12 
   100
M1
      0.0
3/2+
    133.681 11  7/2+       77.393 10 
   133.68 2 
   100 9 
    15 2 
M1+E2

     56.289
      0.0
5/2+
3/2+
    230.72 7  9/2+       97.04 7 
   100

    133.681
7/2+
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - 5/2[413] band.
    314.914 11  5/2+        
    394.364 17  7/2+       79.41 4 
   338.07 2 
   394.34 6 
     3.5 6 
   100 6 
    13 1 

M1+E2

    314.914
     56.289
      0.0
5/2+
5/2+
3/2+
    499 9/2+     
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - 7/2[523] band.
    417.228 13  7/2- 0.88 ns 2       
    488.78 3  9/2-       71.57 3 
   100

    417.228
7/2-
    584 3  11/2-     
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 4 - 5/2[532] band.
    480.130 12  5/2- < 0.1 ns      
    585.776 15  7/2- < 0.2 ns     97.04 7 
   105.64 2 
   168.47 7 
   191.38 3 
   270.87 5 
   452.2 2 
   529.50 2 
   ≤11.4
    58 8 
     6.5 9 
    50.4 24 
    69 3 
     4.7 8 
   100 6 







    488.78
    480.130
    417.228
    394.364
    314.914
    133.681
     56.289
9/2-
5/2-
7/2-
7/2+
5/2+
7/2+
5/2+
    707.19 25  9/2-      121.7 3 
   100

    585.776
7/2-
    847 3  11/2-     
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 5 - Kπ=1/2+ band.
    520 3  1/2+        
    558 3  3/2+     
    602 3  5/2+     
    698 3  7/2+     
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 6 - 1/2[541] band.
    920 3  1/2-        
    950 3  5/2-     
   1020 3  3/2-     
   1064 3  9/2-     
   1178 3  7/2-     
   1900 11/2-     
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 7 - 5/2[402] bandhead
   1252.37 6  5/2+        
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 8 - fragment of 1/2[411]
    980 1/2+        
    997 3      
   1080 3  (5/2+)     
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 9 - 7/2[404] bandhead
    997 3         

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Additional Gamma Data:















E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityMixing
Ratio
Conversion
Coefficient
Additional Data
     56.289 5/2+       56.290 12 M1 16α=16 3
    133.681 7/2+       77.393 10 M1+E20.12 14.63α=4.63
7/2+      133.68 2   0.915α=0.915
    230.72 9/2+       97.04 7   2.7α=2.7 3
    314.914 5/2+      181.232 12 M1+E2-0.87 AP0.371α=0.371 25
5/2+      258.62 3 M1+E2-0.6 +3-2 
5/2+      314.92 2 M1+E2+0.29 6 
    394.364 7/2+       79.41 4   5.2α=5.2 10
7/2+      338.07 2 M1+E2+0.08 3 
    417.228 7/2- 0.88 ns 2     102.315 10 E1 0.283B(E1)(W.u.)=4.0E-5 3, α=0.283
7/2- 0.88 ns 2     283.55 3 E1 0.0191B(E1)(W.u.)=8.0E-7 4, α=0.0191
7/2- 0.88 ns 2     360.94 2 E1 0.01051B(E1)(W.u.)=3.91E-6 14, α=0.01051
7/2- 0.88 ns 2     417.0 4 [M2] 0.1524B(M2)(W.u.)=0.34 5, α=0.1524
    480.130 5/2- < 0.1 ns     62.910 25 [M1+E2] 12α=12 4
5/2- < 0.1 ns     85.79 7 [E1] 0.453B(E1)(W.u.)>8.2E-5, α=0.453
5/2- < 0.1 ns    165.213 15 E1 0.0780B(E1)(W.u.)>0.00020, α=0.0780
5/2- < 0.1 ns    423.86 7 [E1] 0.00718B(E1)(W.u.)>8.1E-7, α=0.00718
5/2- < 0.1 ns    480.12 2 [E1] 0.00539B(E1)(W.u.)>8.4E-6, α=0.00539
    488.78 9/2-       71.57 3   7.6α=7.6 18
    585.776 7/2- < 0.2 ns     97.04 7   2.7α=2.7 3
7/2- < 0.2 ns    105.64 2   2.00α=2.00 13
7/2- < 0.2 ns    168.47 7   0.46α=0.46 5
7/2- < 0.2 ns    191.38 3   0.0528α=0.0528
7/2- < 0.2 ns    270.87 5   0.0214α=0.0214
    707.19 9/2-      121.7 3   1.265α=1.265 24
E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityMixing
Ratio
Conversion
Coefficient
Additional Data

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      0.03/2+ 6.89 d 2 
% β- = 100
Q=+1.2 6, μ=2.2 1
E(level): 3/2[411] band.
     56.2895/2+   E(level): 3/2[411] band.
    133.6817/2+   E(level): 3/2[411] band.
    230.729/2+   XREF: C(236)d(233).
E(level): 3/2[411] band.
    314.9145/2+   E(level): 5/2[413] band.
    394.3647/2+   E(level): 5/2[413] band.
    417.2287/2- 0.88 ns 2  E(level): 7/2[523] band.
    480.1305/2- < 0.1 ns E(level): 5/2[532] band.
    488.789/2-   E(level): 7/2[523] band.
    4999/2+   E(level): 5/2[413] band.
    5201/2+   E(level): Kπ=1/2+ band.
    5583/2+   E(level): Kπ=1/2+ band.
    58411/2-   E(level): 7/2[523] band.
    585.7767/2- < 0.2 ns E(level): 5/2[532] band.
    6025/2+   E(level): Kπ=1/2+ band.
    6987/2+   E(level): Kπ=1/2+ band.
    707.199/2-   E(level): 5/2[532] band.
    84711/2-   E(level): 5/2[532] band.
    9201/2-   E(level): 1/2[541] band.
    9505/2-   E(level): 1/2[541] band.
    9801/2+   E(level): fragment of 1/2[411].
    997   E(level): fragment of 1/2[411]. 7/2[404] bandhead.
   10203/2-   E(level): 1/2[541] band.
   10649/2-   E(level): 1/2[541] band.
   1080(5/2+)   E(level): fragment of 1/2[411].
E(level)Jπ(level)T1/2(level)Comments
   11787/2-   E(level): 1/2[541] band.
   1252.375/2+   E(level): 5/2[402] bandhead.
   1778.19   XREF: C(1782).
   190011/2-   E(level): 1/2[541] band.

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