ADOPTED LEVELS, GAMMAS for 216At

Author: S. -c. Wu |  Citation: Nucl. Data Sheets 108, 1057 (2007) |  Cutoff date: 1-Mar-2007 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=2004 keV 7S(n)= 4559 keV 8S(p)= 4491 keV 4Q(α)= 7950 keV 3
Reference: 2012WA38

References:
  A  220Fr α decay 

General Comments:

Calculations:

n-p interaction energy: 1990Mo11

Spontaneous emission of heavy ions: 1986Po06

Levels: All information about excited levels in this nucleus (except the 413-keV level) comes from 220Fr α decay

Gammas: All γ data are from 220Fr α decay

Q-value: Note: Current evaluation has used the following Q record 2002 8 4559 8 4491 4 7950 3 2003Au03










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
    0.0A 1- 0.30 ms 3 
% α = 100
% ε < 3×10-7
% β- < 6×10-3
     
   44.59 4 A (2)-      44.60 5 
 
M1
    0.0
1-
   57.11 15 A (4)-        
  105.89 5 A (0)-      61.3 1 
  105.88 5 
   23 3 
  100 7 
E2
M1
   44.59
    0.0
(2)-
1-
  122.0 2 A (5)-      64.9 1 
 
M1
   57.11
(4)-
  153.4 1 A (2)-      96.4?
  108.8 1 
  153.4 1 
  <15
   17.3 23 
  100 8 
(E2)
M1
M1
   57.11
   44.59
    0.0
(4)-
(2)-
1-
  160.73 5 A (1)-      54.8 1 
  116.2 1 
  160.7 1 
    3.9 13 
    9.2 13 
  100 5 

M1
M1
  105.89
   44.59
    0.0
(0)-
(2)-
1-
  169.3 1 A (3-)     112.1 2 
  124.7 1 
    7 3 
  100 9 


   57.11
   44.59
(4)-
(2)-
  199.2 2 A (3)-      45.8S
  142.1 1 
  154.5 3 
 
  100 13 
   50 13 

M1
M1
  153.4
   57.11
   44.59
(2)-
(4)-
(2)-
  208.0 1 A (1,2)-      47.3S
  163.4 1 
  208.0 4 
 
  100 3 
    3.9 17 

M1

  160.73
   44.59
    0.0
(1)-
(2)-
1-
  234.6 2 A (1,2-)     128.7 2 
 

  105.89
(0)-
  254.8 4 A     132.8 3 
 

  122.0
(5)-
  278.2 2 A (4)-     156.1 1 
  221.1 3 
  233.6 2 
  100 18 
   18 5 
   32 6 
M1


  122.0
   57.11
   44.59
(5)-
(4)-
(2)-
  302.8 2 A (1,2-)     196.9 2 
  258.2 2 
  302.7 4 
   42 11 
  100 21 
   63 11 



  105.89
   44.59
    0.0
(0)-
(2)-
1-
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  317 3 A        
  381.1 2 A (2-,3-)     173.0 3 
  182.1 2 
  323.9 7 
  381.0 5 
   19 10 
   16 6 
   32 10 
  100 16 




  208.0
  199.2
   57.11
    0.0
(1,2)-
(3)-
(4)-
1-
  413?  (9-) 0.1 ms SY 
% α = 100
     
  421.5 4 A     260.5 5 
  268.3 4 
   78 33 
  100 33 


  160.73
  153.4
(1)-
(2)-
  479.3A     318.6 4 
 

  160.73
(1)-

E(level): From least squares fit to Eγ

Back to top

Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - Possible Configuration=((p,H9/2,+3)(n,G9/2,+5)) (1996Sh05)
    0.0 1- 0.30 ms 3 
% α = 100
% ε < 3×10-7
% β- < 6×10-3
     
   44.59 4  (2)-      44.60 5 
 
M1
    0.0
1-
   57.11 15  (4)-        
  105.89 5  (0)-      61.3 1 
  105.88 5 
   23 3 
  100 7 
E2
M1
   44.59
    0.0
(2)-
1-
  122.0 2  (5)-      64.9 1 
 
M1
   57.11
(4)-
  169.3 1  (3-)     112.1 2 
  124.7 1 
    7 3 
  100 9 


   57.11
   44.59
(4)-
(2)-
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - Possible Configuration=((p,H9/2,+3)(n,G9/2,+4)(n,I11/2)) +
  153.4 1  (2)-        
  160.73 5  (1)-      54.8 1 
  116.2 1 
  160.7 1 
    3.9 13 
    9.2 13 
  100 5 

M1
M1
  105.89
   44.59
    0.0
(0)-
(2)-
1-
  199.2 2  (3)-        
  278.2 2  (4)-     156.1 1 
  221.1 3 
  233.6 2 
  100 18 
   18 5 
   32 6 
M1


  122.0
   57.11
   44.59
(5)-
(4)-
(2)-

Back to top

Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
   44.59 (2)-      44.60 5 M124.6α=24.6
  105.89 (0)-      61.3 1 E276.3α=76.3
(0)-     105.88 5 M110.27α=10.27
  122.0 (5)-      64.9 1 M18.18α=8.18
  153.4 (2)-      96.4(E2)9.00α=9.00
(2)-     108.8 1 M19.51α=9.51
(2)-     153.4 1 M13.58α=3.58
  160.73 (1)-     116.2 1 M17.88α=7.88
(1)-     160.7 1 M13.14α=3.14
  199.2 (3)-     142.1 1 M14.45α=4.45
(3)-     154.5 3 M13.51α=3.51
  208.0 (1,2)-     163.4 1 M12.99α=2.99
  278.2 (4)-     156.1 1 M13.41α=3.41

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
    0.01- 0.30 ms 3 
% α = 100
% ε < 3×10-7
% β- < 6×10-3
E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+5)) (1996Sh05).
   44.59(2)-   E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+5)) (1996Sh05).
   57.11(4)-   E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+5)) (1996Sh05).
  105.89(0)-   E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+5)) (1996Sh05).
  122.0(5)-   E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+5)) (1996Sh05).
  153.4(2)-   E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+4)(n,I11/2)) +.
  160.73(1)-   E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+4)(n,I11/2)) +.
  169.3(3-)   E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+5)) (1996Sh05).
  199.2(3)-   E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+4)(n,I11/2)) +.
  278.2(4)-   E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+4)(n,I11/2)) +.
  413(9-) 0.1 ms SY 
% α = 100
1971Br13 report a 7960α with T1/2 characteristic of 220Fr in a 224Ac source (absence of this group in αα with 212Po rules out assignment to 220Fr itself). Iα/Iα(216At g.s. α)=2.8×10-4. This α group may feed the 250-keV, (9-) isomer in 212Bi, in which case one predicts, on the basis of systematics (HF=2.2), a 9- isomer in 216At at 413 keV with T1/2≈0.1 ms (1980Sc26).

Back to top