ADOPTED LEVELS, GAMMAS for 217At

Authors: F.G. Kondev, S. Kumar |  Citation: Nucl. Data Sheets 147, 382 (2018) |  Cutoff date: 1-DEC-2017 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=736 keV 6S(n)= 5933 keV 6S(p)= 4677 keV 5Q(α)= 7201.4 keV 12
Reference: 2017WA10

References:
  A  221Fr α decay 

General Comments:

217At evaluated by F.γ. Kondev and S. Kumar

Q-value: S(2n)=10492 8; S(2p)=11813 7 (2017Wa10).










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
    0.0A 9/2- 32.6 ms 3 
% β- = 0.007 3
% α = 99.993 3
     
  100.13 8 A 7/2- < 0.5 ns   100.2 1 
  100
M1
    0.0
9/2-
  217.97 9 A 5/2- 0.27 ns 2    117.8 2 
  218.0 1 
    0.20 12 
  100
M1(+E2)
E2
  100.13
    0.0
7/2-
9/2-
  271.75 10 A 3/2-      53.8 1 
  171.6 1 
   19 3 
  100 3 
M1
E2
  217.97
  100.13
5/2-
7/2-
  310.10 20 A (13/2+)     310.1 2 
  100
[M2]
    0.0
9/2-
  367.99 13 A 3/2-      96.3 3 
  150.0 1 
   16 7 
  100 4 
(E2+M1)
M1+E2
  271.75
  217.97
3/2-
5/2-
  381.42 17 A (7/2)-     281.9 3 
  381.1 2 
    2.0 2 
  100 4 
[M1]
M1(+E2)
  100.13
    0.0
7/2-
9/2-
  410.40 20 A 13/2-     410.4 2 
  100
E2
    0.0
9/2-
  424.13 22 A (5/2,7/2,9/2)-     324.0 2 
  100
M1(+E2)
  100.13
7/2-
  537.8 5 A (7/2,9/2)     437.8 5 
  537.5 8 
   23 3 
  100 8 


  100.13
    0.0
7/2-
9/2-
  568.7 3 A (7/2,9/2)     469.0 5 
  568.5 3 
  100 21 
   79 29 


  100.13
    0.0
7/2-
9/2-
  576.90 19 A 7/2-     208.3 6 
  359.0 2 
  576.9 4 
   13 3 
  100 4 
    9.2 9 
[E2]
M1(+E2)
[M1]
  367.99
  217.97
    0.0
3/2-
5/2-
9/2-
  652.0 20 A     652 2 
  100

    0.0
9/2-
  663.3 3 A (5/2-,7/2,9/2-)     281.8 3 
  446.3 8 
  562.3 12 
  665 2 
 
  100 27 
  ≈33
  ≈53




  381.42
  217.97
  100.13
    0.0
(7/2)-
5/2-
7/2-
9/2-
  809.30 20 A     809.3 2 
  100

    0.0
9/2-
  891.9 3 A     891.9 3 
  100

    0.0
9/2-

E(level): From a least-squares fit to Eγ.

Jπ(level): From the proposed decay scheme in 1995Sh01 and the measured γ-ray transition multipolarities, unless otherwise stated.

E(γ): From 1995Sh01, unless otherwise stated. Uncertainties quoted for many Eγ in 1999Gr33, 1995Bu17 and 1994Ar23 are unrealistically small, given the large-size Ge detectors used in these measurements and the absence of information regarding the calibration procedure.

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - Dominant π(h9/2)3ν(g9/2)6
    0.0 9/2- 32.6 ms 3 
% β- = 0.007 3
% α = 99.993 3
     
  217.97 9  5/2- 0.27 ns 2    117.8 2 
  218.0 1 
    0.20 12 
  100
M1(+E2)
E2
  100.13
    0.0
7/2-
9/2-
  367.99 13  3/2-      96.3 3 
  150.0 1 
   16 7 
  100 4 
(E2+M1)
M1+E2
  271.75
  217.97
3/2-
5/2-
  410.40 20  13/2-     410.4 2 
  100
E2
    0.0
9/2-
  576.90 19  7/2-     208.3 6 
  359.0 2 
  576.9 4 
   13 3 
  100 4 
    9.2 9 
[E2]
M1(+E2)
[M1]
  367.99
  217.97
    0.0
3/2-
5/2-
9/2-
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - Dominant π(f7/21,h9/22)ν(g9/2)6
  100.13 8  7/2- < 0.5 ns      
  271.75 10  3/2-      53.8 1 
  171.6 1 
   19 3 
  100 3 
M1
E2
  217.97
  100.13
5/2-
7/2-
  381.42 17  (7/2)-     281.9 3 
  381.1 2 
    2.0 2 
  100 4 
[M1]
M1(+E2)
  100.13
    0.0
7/2-
9/2-
  424.13 22  (5/2,7/2,9/2)-     324.0 2 
  100
M1(+E2)
  100.13
7/2-
  568.7 3  (7/2,9/2)     469.0 5 
  568.5 3 
  100 21 
   79 29 


  100.13
    0.0
7/2-
9/2-
  663.3 3  (5/2-,7/2,9/2-)     281.8 3 
  446.3 8 
  562.3 12 
  665 2 
 
  100 27 
  ≈33
  ≈53




  381.42
  217.97
  100.13
    0.0
(7/2)-
5/2-
7/2-
9/2-

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Additional Gamma Data:















E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
  100.13 7/2- < 0.5 ns   100.2 1 M1 11.98B(M1)(W.u.)>0.0033, α=11.98, α(K)=9.67 14, α(L)=1.76 3, α(M)=0.417 6, α(N)=0.1081 16, α(O)=0.0231 4, α(P)=0.00320 5
  217.97 5/2- 0.27 ns 2    117.8 2 M1(+E2)2.1 LT6.1B(E2)(W.u.)<1.4, B(M1)(W.u.)>1.3E-5, α=6.1 16, α(K)=3.8 24, α(L)=1.70 60, α(M)=0.44 18, α(N)=0.113 45, α(O)=0.0228 84, α(P)=0.0026 7
5/2- 0.27 ns 2    218.0 1 E2 0.368B(E2)(W.u.)=40 3, α=0.368, α(K)=0.1377 20, α(L)=0.1705 24, α(M)=0.0452 7, α(N)=0.01168 17, α(O)=0.00232 4, α(P)=0.000246 4
  271.75 3/2-      53.8 1 M1 14.17α=14.17, α(L)=10.79 17, α(M)=2.56 4, α(N)=0.663 10, α(O)=0.1419 22, α(P)=0.0196 3
3/2-     171.6 1 E2 0.867α=0.867, α(K)=0.227 4, α(L)=0.474 7, α(M)=0.1264 18, α(N)=0.0327 5, α(O)=0.00645 10, α(P)=0.000670 10
  310.10 (13/2+)     310.1 2 [M2] 1.79α=1.79, α(K)=1.331 19, α(L)=0.343 5, α(M)=0.0856 13, α(N)=0.0224 4, α(O)=0.00476 7, α(P)=0.000641 9
  367.99 3/2-      96.3 3 (E2+M1) 5.8α=5.8 32
3/2-     150.0 1 M1+E20.54 243.3α=3.3 4, α(K)=2.5 5, α(L)=0.62 5, α(M)=0.153 16, α(N)=0.040 4, α(O)=0.0083 7, α(P)=0.00105 4
  381.42 (7/2)-     281.9 3 [M1] 0.653α=0.653, α(K)=0.530 8, α(L)=0.0938 14, α(M)=0.0222 4, α(N)=0.00575 9, α(O)=0.001231 18, α(P)=0.0001700 25
(7/2)-     381.1 2 M1(+E2)0.9 LT0.24α=0.24 5, α(K)=0.19 5, α(L)=0.036 5, α(M)=0.0087 11, α(N)=0.0022 3, α(O)=0.00048 6, α(P)=6.4×10-5 10
  410.40 13/2-     410.4 2 E2 0.0549α=0.0549, α(K)=0.0344 5, α(L)=0.01531 22, α(M)=0.00392 6, α(N)=0.001015 15, α(O)=0.000206 3, α(P)=2.39×10-5 4
  424.13 (5/2,7/2,9/2)-     324.0 2 M1(+E2)1.1 LT0.353α=0.353 94, α(K)=0.279 84, α(L)=0.056 8, α(M)=0.0135 17, α(N)=0.0035 5, α(O)=0.00074 10, α(P)=9.9×10-5 17
  576.90 7/2-     208.3 6 [E2] 0.430α=0.430 8, α(K)=0.1519 24, α(L)=0.206 4, α(M)=0.0547 11, α(N)=0.0141 3, α(O)=0.00281 6, α(P)=0.000296 6
7/2-     359.0 2 M1(+E2)0.5 LT0.31α=0.31 3, α(K)=0.251 23, α(L)=0.0459 25, α(M)=0.0109 6, α(N)=0.00282 14, α(O)=0.00060 4, α(P)=8.2×10-5 6
7/2-     576.9 4 [M1] 0.0948α=0.0948, α(K)=0.0772 11, α(L)=0.01342 19, α(M)=0.00317 5, α(N)=0.000820 12, α(O)=0.0001756 25, α(P)=2.43×10-5 4

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  310.10(13/2+)   E(level): Probable π(i13/21,h9/22)ν(g9/2)6.

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Additional Gamma Comments:

E(level)E(gamma)Comments
  100.13  100.2E(γ): From 1995Sh01. Others: 100.63 2 (1994Ar23), 99.52 6 (1995Bu17) and 100.25 2 (1999Gr33).
M(γ): α(L)exp=1.2 6 (1995Sh01)
  217.97  117.8E(γ): From 1995Sh01. Others: 118.0 2 (1968Le07,1969LeZW), 117.67 5 (1994Ar23), 118.18 9 (1995Bu17) and 117.82 3 (1999Gr33).
  218.0E(γ): From 1995Sh01. Others: 218.0 4 (1968Le07,1969LeZW), 218.30 2 (1994Ar23), 218.14 3 (1995Bu17) and 218.12 2 (1999Gr33).
M(γ): From K:(L1+L2):L3=1.50 7:1.40 15:0.53 5 in 1969Dz06. α(exp)=0.14 used as a normalization in 1995Sh01. γ anisotropy in 1992Li26 is also consistent with Mult=E2
  271.75   53.8E(γ): From 1995Sh01. Others: 53.54 18 (1995Bu17) and 53.81 3 (1999Gr33).
M(γ): α(L)exp=8 4 (1995Sh01)
  171.6E(γ): From 1995Sh01. Others: 171.83 3 (1999Gr33), 171.68 4 (1995Bu17), 172.05 5 (1994Ar23).
M(γ): α(K)exp=0.3 1 (1995Sh01); α(exp)=0.84 2 (1999Gr33)
  310.10  310.1E(γ): Rounded off from 1995Bu17. Other: 314.20 5 (1994Ar23).
  367.99   96.3E(γ): From 1995Sh01 and 1999Gr33. Other: 96.12 18 (1995Bu17).
M(γ): α(L)exp>2.5 (1995Sh01) would imply a sizable E2 component (α(L,M1)=1.98, α(L,E2)=6.6). Note, that α(exp)=25 15 (1999Gr33) is not consistent with either M1 or E2 (α(M1)=2.6, α(E2)=8.9).
  150.0E(γ): From 1995Sh01. Others: 150.21 3 (1999Gr33), 150.04 4 (1995Bu17), 150.43 5 (1994Ar23).
  381.42  281.9E(γ): From 1995Sh01. Others: 282.12 9 (1999Gr33), 282.36 15 (1995Bu17), 282.25 5 (1994Ar23).
  381.1E(γ): From 1995Sh01. Others: 382.34 4 (1999Gr33), 381.81 4 (1995Bu17), 382.36 2 (1994Ar23).
  410.40  410.4E(γ): From 1995Sh01. Others: 410.64 5 (1999Gr33), 409.93 7 (1995Bu17), 410.73 2 (1994Ar23).
M(γ): α(K)exp=0.03 1 (1995Sh01)
  424.13  324.0E(γ): From 1995Sh01. Others: 324.10 6 (1999Gr33), 323.99 6 (1995Bu17), 323.99 3 (1994Ar23).
  537.8  437.8E(γ): From 1995Sh01. Others: 437.00 5 (1999Gr33) and 435.68 10 (1994Ar23).
  537.5E(γ): From 1995Sh01. Others: 537.8 8 (1999Gr33), 537.0 2 (1995Bu17) and 538.02 10 (1994Ar23).
  568.7  469.0E(γ): From 1995Sh01. Others: 468.3 7 (1999Gr33) and 469.6 2 (1995Bu17)
  568.5E(γ): From 1999Gr33 (same in 1995Bu17). Other: 568.4 10 (1995Sh01)
  576.90  208.3E(γ): From 1999Gr33. Other: 208.3 5 (1995Bu17).
  359.0E(γ): From 1995Sh01. Others: 359.86 4 (1999Gr33) and 359.92 6 (1995Bu17)
  576.9E(γ): From 1999Gr33 (same in 1995Bu17). Other: 577.0 8 (1995Sh01) and 577.76 6 (1994Ar23).
  652.0  652E(γ): From 1999Gr33
  663.3  281.8E(γ): Doublet from 1995Sh01.
  446.3E(γ): From 1995Sh01. Others: 446.30 8 (1999Gr33) and 445.07 20 (1995Bu17)
  562.3E(γ): From 1995Sh01
  665E(γ): From 1999Gr33
  809.30  809.3E(γ): From 2002Gr36
E(level)E(gamma)Comments
  891.9  891.9E(γ): From 2002Gr36

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