ADOPTED LEVELS, GAMMAS for 163Tb

Authors: C. W. Reich, Balraj Singh |  Citation: Nucl. Data Sheets 111, 1211 (2010) |  Cutoff date: 12-Apr-2010 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=1785 keV 4S(n)= 6.99×103 keV 4S(p)= 7604 keV 6Q(α)= -977 keV 6
Reference: 2012WA38

References:
  A  163Gd β- decay (68 S)  B  164Dy(d,3He)
  C  164Dy(t,α) 

General Comments:

Structure calculations: 1996Du06

α 6.5H activity was assigned to 163Tb from fission of uranium (1960Al33) and 164Dy(γ,p) (1962Ta12). 1957Fa48 tentatively assigned an activity of ≈8 h to 163Tb from the 160Gd(α,p) reaction. 1962Ta12 also report eight γ rays and four β transitions populating levels at 25, 74, 235, 335, and 510 in 163Dy. These results have not been confirmed in the later studies of 1966Fu08 and 1971Ka22 using the 164Dy(γ,p) and 163Dy(n,p) reactions. Thus, the assignment of a 6.5H activity to 163Tb is considered by the evaluators as doubtful.

Gammas: See 163Gd β- decay (68 s) for nine other γ rays assigned to the decay of 163Gd

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









E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)Final Levels
     0.0ABC 3/2+ 19.5 m 3 
% β- = 100
    
    54 2 ABC 5/2+       
   128 5 ABC 7/2+       
   223 2  BC 9/2+       
   344 5 ABC 7/2-     214.0 2 ?
  287.79 8 ?
   46 3 
  100
   128
    54
7/2+
5/2+
   373 5 ABC 5/2+     373.37 15 ?
  100
     0.0
3/2+
   422 5  BC 9/2-       
   452 2  BC 7/2+       
   522 2  BC 11/2-       
   552 5  BC 9/2+       
   552? BC (5/2-)       
   640 10 ? BC (3/2+)       
   662 5  BC 7/2-       
   678 10 ? BC (5/2+)       
   771 5  BC 9/2-       
   890 2  BC 11/2-       
   960 5  BC (1/2+)       
   987 2  BC (3/2)+       
  1065 2  BC (5/2)+       
  1112 5  BC (7/2)+       
  1186 5  BC       
  1219 2  BC (1/2+)       
  1281 2  BC 3/2+&5/2+       
  1351 5  BC (9/2+)       
  1428 2  BC 7/2+&9/2+       
  1498 5  BC       
  1549 5  BC       
  1815 2  BC (7/2)-       
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)Final Levels
  1902 5  BC       
  1982 2  BC (11/2)-       
  2204 5   C       
  2334 5   C       
  2432 5   C       

E(level): From (t,α)

Jπ(level): From (t,α), based primarily on relative cross sections of band members ( "finger-print " method) and consistency of L-transfer for several levels. Parentheses in selected cases are by the evaluators

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 1 - π3/2[411] band.
     0.0 3/2+ 19.5 m 3 
% β- = 100
    
    54 2  5/2+       
   128 5  7/2+       
   223 2  9/2+       
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 2 - π7/2[523] band.
   344 5  7/2-       
   422 5  9/2-       
   522 2  11/2-       
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 3 - π5/2[532] band.
   552 (5/2-)       
   662 5  7/2-       
   771 5  9/2-       
   890 2  11/2-       
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 4 - π5/2[413] band.
   373 5  5/2+       
   452 2  7/2+       
   552 5  9/2+       
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 5 - π3/2[541] band.
  1815 2  (7/2)-       
  1982 2  (11/2)-       
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 6 - Kπ=1/2+ band.
   960 5  (1/2+)       
   987 2  (3/2)+       
  1065 2  (5/2)+       
  1112 5  (7/2)+       
  1351 5  (9/2+)     
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 7 - Kπ=1/2+ band.
   640 10  (3/2+)       
   678 10  (5/2+)       
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 8 - π1/2[420] band.
  1219 2  (1/2+)       
  1281 2  3/2+&5/2+       
  1428 2  7/2+&9/2+       

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.03/2+ 19.5 m 3 
% β- = 100
E(level): π3/2[411] band.
    545/2+   E(level): π3/2[411] band.
   1287/2+   E(level): π3/2[411] band.
   2239/2+   XREF: B(235).
E(level): π3/2[411] band.
   3447/2-   E(level): π7/2[523] band.
   3735/2+   XREF: B(388).
E(level): π5/2[413] band.
   4229/2-   XREF: B(437).
E(level): π7/2[523] band.
Jπ(level): See 164Dy(d,3He) for a different assignment to a level near this energy (within≈20 keV).
   4527/2+   XREF: B(465).
E(level): π5/2[413] band.
   52211/2-   XREF: B(537).
E(level): π7/2[523] band.
   5529/2+   E(level): π5/2[413] band.
Jπ(level): See 164Dy(d,3He) for a different assignment to a level near this energy (within≈20 keV).
   552(5/2-)   E(level): π5/2[532] band.
   640(3/2+)   E(level): Kπ=1/2+ band.
   6627/2-   E(level): π5/2[532] band.
Jπ(level): See 164Dy(d,3He) for a different assignment to a level near this energy (within≈20 keV).
   678(5/2+)   XREF: B(709).
E(level): Kπ=1/2+ band.
   7719/2-   XREF: B(789).
E(level): π5/2[532] band.
Jπ(level): See 164Dy(d,3He) for a different assignment to a level near this energy (within≈20 keV).
   89011/2-   E(level): π5/2[532] band.
   960(1/2+)   E(level): Kπ=1/2+ band.
   987(3/2)+   E(level): Kπ=1/2+ band.
  1065(5/2)+   E(level): Kπ=1/2+ band.
Jπ(level): See 164Dy(d,3He) for a different assignment to a level near this energy (within≈20 keV).
  1112(7/2)+   E(level): Kπ=1/2+ band.
Jπ(level): See 164Dy(d,3He) for a different assignment to a level near this energy (within≈20 keV).
  1219(1/2+)   E(level): π1/2[420] band.
  12813/2+&5/2+   E(level): π1/2[420] band.
  1351(9/2+)   E(level): Kπ=1/2+ band.
  14287/2+&9/2+   E(level): π1/2[420] band.
  1815(7/2)-   E(level): π3/2[541] band.
Jπ(level): See 164Dy(d,3He) for a different assignment to a level near this energy (within≈20 keV).
E(level)Jπ(level)T1/2(level)Comments
  1982(11/2)-   E(level): π3/2[541] band.
Jπ(level): See 164Dy(d,3He) for a different assignment to a level near this energy (within≈20 keV).

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