ADOPTED LEVELS, GAMMAS for 203At

Author: F.G. Kondev |  Citation: Nucl. Data Sheets 177, 509, 2021 |  Cutoff date: 4-Jul-2021 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-5979 keV 12S(n)= 9.64×103 keV 3S(p)= 1510 keV 14Q(α)= 6210.1 keV 8
Reference: 2021WA16

References:
  A  207Fr α decay  B  194Pt(14N,5nγ)
  C  159Tb(48Ca,4nγ) 








E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0ABC 9/2- 7.4 m 2 
% ε = 69 3
% α = 31 3
     
   221.40 20   C 7/2-      221.4 2 
  100
M1+E2
     0
9/2-
   648.64 15  BC 13/2-      648.6 2 
  100
E2
     0
9/2-
   659.95 16  BC 11/2-      660.0 2 
  100
M1+E2
     0
9/2-
   683.4 3   C 1/2+ 3.5 ms 6     462.0 2 
  100
E3
   221.40
7/2-
   861.3 6   C (3/2+)      177.9 5 
  100
(M1+E2)
   683.4
1/2+
   871.81 14  BC 13/2+ 2.8 ns 21     211.9 2 
   223.2 2 
   871.8 2 
  100 3 
   15.8 11 
   33.4 11 
E1
(E1)
(M2)
   659.95
   648.64
     0
11/2-
13/2-
9/2-
  1017.8 7   C (5/2+)      156.6 5 
  100
(M1+E2)
   861.3
(3/2+)
  1225.23 21  BC 17/2-      576.5 2 
  100
E2
   648.64
13/2-
  1303.6 8   C (7/2+)      442.2 6 
  100
(E2)
   861.3
(3/2+)
  1378.81 19  BC 15/2+      506.9 2 
  100
M1(+E2)
   871.81
13/2+
  1503.8 8 ?  C (9/2+)      200.1 5 ?
   486.1 6 ?
   43 4 
  100 8 
(M1)
(E2)
  1303.6
  1017.8
(7/2+)
(5/2+)
  1633.15 19  BC 17/2+      254.3 2 
   761.4 2 
   47.8 25 
  100 3 
M1(+E2)
E2
  1378.81
   871.81
15/2+
13/2+
  1636.3 3  BC 21/2-      411.2 2 
  100
E2
  1225.23
17/2-
  1695.38 19  BC 17/2+      316.5 2 
   823.7 2 
   79 6 
  100 4 
(M1)
E2
  1378.81
   871.81
15/2+
13/2+
  1870.0 12   C (11/2+)      566.4 9 
  100
(E2)
  1303.6
(7/2+)
  1941.83 20  BC (19/2)+      246.5 2 
   308.7 2 
   716.4 2 
   27.8 17 
  100 3 
   29.8 11 
(M1)
M1(+E2)

  1695.38
  1633.15
  1225.23
17/2+
17/2+
17/2-
  1964.3 3  BC 23/2-      328.1 2 
  100
M1(+E2)
  1636.3
21/2-
  1980.4 3 ?  C (21/2)+       38.5 2 
  100
M1
  1941.83
(19/2)+
  1992.6 9 ?  C (23/2+)       12.2 10 S
    50.6 12 S
 
 


  1980.4
  1941.83
(21/2)+
(19/2)+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  2044.2 3   C 25/2+ 13.9 ns 14      63.5 3 
    80.0 3 S
   37 12 
  100 25 
E2
(E1)
  1980.4
  1964.3
(21/2)+
23/2-
  2072.0 5  BC 21/2-      435.5 6 
   847.0 7 
   73 19 
  100 15 
(M1+E2)
(E2)
  1636.3
  1225.23
21/2-
17/2-
  2098.5 10 ?  C (13/2+)      594.7 6 ?
  100

  1503.8
(9/2+)
  2330.0 3   C 29/2+ 9.77 µs 21     285.8 2 
   365.8 2 
  100 10 
   82 8 
E2
E3
  2044.2
  1964.3
25/2+
23/2-
  2490.7 6   C      854.3 7 
  100

  1636.3
21/2-
  2536.9 9 ?  C (25/2+)      544.2 5 ?
  100

  1992.6
(23/2+)
  2639.9 8   C (25/2-)      567.9 6 ?
  100

  2072.0
21/2-
  2751.2 10 ?  C      214.3 4 ?
  100

  2536.9
(25/2+)
  2756.1 7   C      265.4 5 
   684.1 7 ?
   21 8 
  100 20 


  2490.7
  2072.0

21/2-
  2887.6 8   C      923.3 7 
  100

  1964.3
23/2-
  2952.8 8   C      988.5 7 
  100

  1964.3
23/2-
  2989.2 10 ?  C      452.3 5 ?
  100

  2536.9
(25/2+)
  3013.3 10 ?  C      476.4 5 ?
  100

  2536.9
(25/2+)
  3071.4 10 ?  C      534.5 5 ?
  100

  2536.9
(25/2+)
  3174.9 11 ?  C      423.7 5 ?
  100

  2751.2

  3250.2 6   C (33/2+)      919.7 7 
  100

  2330.0
29/2+
  3311.2 8   C      981.2 7 ?
  100

  2330.0
29/2+
  3318.6 11 ?  C      567.4 5 ?
  100

  2751.2

  3349.5 11   C (29/2-)      709.6 7 ?
  100

  2639.9
(25/2-)
  3485.5 8 ?  C (27/2+)      948.5 7 ?
  1155.5 8 ?
  100 4 
   26.1 15 


  2536.9
  2330.0
(25/2+)
29/2+
  3547.9 9   C     1217.8 8 ?
  100

  2330.0
29/2+
  3616.2 7   C      365.8 4 
  1286.8 8 
  100 7 
   88 5 


  3250.2
  2330.0
(33/2+)
29/2+
  3619.3 9 ?  C (29/2+)      133.8 4 
  100

  3485.5
(27/2+)
  3768.5 10   C     1438.4 9 ?
  100

  2330.0
29/2+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  3770.4 8   C 37/2+      520.2 5 
  100

  3250.2
(33/2+)
  3772.8 12   C      423.3 6 ?
  100

  3349.5
(29/2-)
  3842.7 10 ?  C (31/2+)      223.4 4 
  100

  3619.3
(29/2+)
  3947.3 8 ?  C      331.1 4 ?
  100

  3616.2

  4102.1 10 ?  C (33/2+)      259.4 4 
  100

  3842.7
(31/2+)
  4385.4 11 ?  C (35/2+)      283.3 4 
  100

  4102.1
(33/2+)
  4638.8 12 ?  C (37/2+)      253.4 4 
  100

  4385.4
(35/2+)
  4817.6 13 ?  C (39/2+)      178.8 5 
  100

  4638.8
(37/2+)
  5011.2 13 ?  C (41/2+)      193.6 4 
  100

  4817.6
(39/2+)
  5332.9 15 ?  C (43/2+)      321.7 6 
  100

  5011.2
(41/2+)
  5713.9 16 ?  C (45/2+)      381.0 6 
  100

  5332.9
(43/2+)

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

Jπ(level): Based on deduced transition multipolarities, multiple decay branches and systematics arguments. Details are given with each level

M(γ): From γ(θ) and total electron conversion coefficients (from intensity balance considerations) in 194Pt(14N,5nγ) (1983Dy02) and 159Tb(48Ca,4nγ) (2017Au05,2018Au01)

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - Dipole band.
  3485.5 8  (27/2+)        
  3619.3 9  (29/2+)      133.8 4 
  100

  3485.5
(27/2+)
  3842.7 10  (31/2+)      223.4 4 
  100

  3619.3
(29/2+)
  4102.1 10  (33/2+)      259.4 4 
  100

  3842.7
(31/2+)
  4385.4 11  (35/2+)      283.3 4 
  100

  4102.1
(33/2+)
  4638.8 12  (37/2+)      253.4 4 
  100

  4385.4
(35/2+)
  4817.6 13  (39/2+)      178.8 5 
  100

  4638.8
(37/2+)
  5011.2 13  (41/2+)      193.6 4 
  100

  4817.6
(39/2+)
  5332.9 15  (43/2+)      321.7 6 
  100

  5011.2
(41/2+)
  5713.9 16  (45/2+)      381.0 6 
  100

  5332.9
(43/2+)

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
   221.40 7/2-      221.4 2 M1+E21.275α=1.275 19, α(K)=1.033 15, α(L)=0.184 3, α(M)=0.0435 7, α(N)=0.01127 16, α(O)=0.00241 4, α(P)=0.000333 5
   648.64 13/2-      648.6 2 E20.0186α=0.0186, α(K)=0.01367 20, α(L)=0.00374 6, α(M)=0.000928 13, α(N)=0.000240 4, α(O)=4.97×10-5 7, α(P)=6.18E-6 9
   659.95 11/2-      660.0 2 M1+E20.0665α=0.0665, α(K)=0.0542 8, α(L)=0.00939 14, α(M)=0.00221 4, α(N)=0.000573 8, α(O)=0.0001228 18, α(P)=1.699×10-5 24
   683.4 1/2+ 3.5 ms 6     462.0 2 E30.1505B(E3)(W.u.)=0.027 +6-4, α=0.1505, α(K)=0.0682 10, α(L)=0.0609 9, α(M)=0.01622 23, α(N)=0.00422 6, α(O)=0.000852 12, α(P)=9.63E-5 14
   861.3 (3/2+)      177.9 5 (M1+E2)2.35α=2.35, α(K)=1.91 3, α(L)=0.340 6, α(M)=0.0806 13, α(N)=0.0209 4, α(O)=0.00447 8, α(P)=0.000617 10
   871.81 13/2+ 2.8 ns 21     211.9 2 E10.0731B(E1)(W.u.)=4.6E-6 +53-21, α=0.0731, α(K)=0.0589 9, α(L)=0.01081 16, α(M)=0.00256 4, α(N)=0.000656 10, α(O)=0.0001363 20, α(P)=1.732E-5 25
13/2+ 2.8 ns 21     223.2 2 (E1)0.0645B(E1)(W.u.)=6E-7 +7-3, α=0.0645, α(K)=0.0521 8, α(L)=0.00949 14, α(M)=0.00225 4, α(N)=0.000576 9, α(O)=0.0001198 17, α(P)=1.528E-5 22
13/2+ 2.8 ns 21     871.8 2 (M2)0.0788B(M2)(W.u.)=0.13 +15-6, α=0.0788, α(K)=0.0625 9, α(L)=0.01238 18, α(M)=0.00298 5, α(N)=0.000774 11, α(O)=0.0001654 24, α(P)=2.27×10-5 4
  1017.8 (5/2+)      156.6 5 (M1+E2)3.38α=3.38 6, α(K)=2.73 5, α(L)=0.489 9, α(M)=0.1157 20, α(N)=0.0300 5, α(O)=0.00642 11, α(P)=0.000887 15
  1225.23 17/2-      576.5 2 E20.0242α=0.0242, α(K)=0.01721 25, α(L)=0.00523 8, α(M)=0.001308 19, α(N)=0.000338 5, α(O)=6.97×10-5 10, α(P)=8.53E-6 12
  1303.6 (7/2+)      442.2 6 (E2)0.0454α=0.0454, α(K)=0.0295 5, α(L)=0.01192 18, α(M)=0.00304 5, α(N)=0.000786 12, α(O)=0.0001601 24, α(P)=1.88×10-5 3
  1378.81 15/2+      506.9 2 M1(+E2)0.1335α=0.1335, α(K)=0.1086 16, α(L)=0.0190 3, α(M)=0.00448 7, α(N)=0.001159 17, α(O)=0.000248 4, α(P)=3.43×10-5 5
  1503.8 (9/2+)      200.1 5 (M1)1.69α=1.69 3, α(K)=1.371 22, α(L)=0.244 4, α(M)=0.0578 9, α(N)=0.01497 24, α(O)=0.00321 5, α(P)=0.000443 7
(9/2+)      486.1 6 (E2)0.0360α=0.0360, α(K)=0.0242 4, α(L)=0.00879 13, α(M)=0.00222 4, α(N)=0.000575 9, α(O)=0.0001177 18, α(P)=1.401×10-5 21
  1633.15 17/2+      254.3 2 M1(+E2)0.868α=0.868, α(K)=0.704 10, α(L)=0.1249 18, α(M)=0.0295 5, α(N)=0.00765 11, α(O)=0.001638 24, α(P)=0.000226 4
17/2+      761.4 2 E20.01330α=0.01330, α(K)=0.01007 15, α(L)=0.00244 4, α(M)=0.000599 9, α(N)=0.0001548 22, α(O)=3.23×10-5 5, α(P)=4.10E-6 6
  1636.3 21/2-      411.2 2 E20.0546α=0.0546, α(K)=0.0343 5, α(L)=0.01521 22, α(M)=0.00390 6, α(N)=0.001008 15, α(O)=0.000205 3, α(P)=2.37×10-5 4
  1695.38 17/2+      316.5 2 (M1)0.475α=0.475, α(K)=0.386 6, α(L)=0.0682 10, α(M)=0.01612 23, α(N)=0.00417 6, α(O)=0.000894 13, α(P)=0.0001235 18
17/2+      823.7 2 E20.01133α=0.01133, α(K)=0.00869 13, α(L)=0.00200 3, α(M)=0.000488 7, α(N)=0.0001262 18, α(O)=2.64×10-5 4, α(P)=3.39E-6 5
  1870.0 (11/2+)      566.4 9 (E2)0.0251α=0.0251, α(K)=0.0178 3, α(L)=0.00551 9, α(M)=0.001380 21, α(N)=0.000357 6, α(O)=7.35×10-5 11, α(P)=8.96E-6 14
  1941.83 (19/2)+      246.5 2 (M1)0.946α=0.946, α(K)=0.767 11, α(L)=0.1362 20, α(M)=0.0322 5, α(N)=0.00834 12, α(O)=0.00179 3, α(P)=0.000247 4
(19/2)+      308.7 2 M1(+E2)0.509α=0.509, α(K)=0.413 6, α(L)=0.0730 11, α(M)=0.01726 25, α(N)=0.00447 7, α(O)=0.000957 14, α(P)=0.0001323 19
  1964.3 23/2-      328.1 2 M1(+E2)0.431α=0.431, α(K)=0.350 5, α(L)=0.0618 9, α(M)=0.01460 21, α(N)=0.00378 6, α(O)=0.000810 12, α(P)=0.0001119 16
  1980.4 (21/2)+       38.5 2 M137.9α=37.9 8, α(L)=28.9 6, α(M)=6.85 15, α(N)=1.77 4, α(O)=0.380 8, α(P)=0.0525 11
  2044.2 25/2+ 13.9 ns 14      63.5 3 E264.4B(E2)(W.u.)=8.1 9, α=64.4 18, α(L)=47.6 13, α(M)=12.7 4, α(N)=3.29 9, α(O)=0.642 18, α(P)=0.0639 18
25/2+ 13.9 ns 14      80.0 3 (E1)0.183B(E1)(W.u.)=1.1E-6 +6-4, α=0.183 4, α(L)=0.1389 24, α(M)=0.0333 6, α(N)=0.00845 15, α(O)=0.00170 3, α(P)=0.000198 4
E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
  2072.0 21/2-      435.5 6 (M1+E2)0.200α=0.200, α(K)=0.1629 24, α(L)=0.0285 5, α(M)=0.00674 10, α(N)=0.00175 3, α(O)=0.000374 6, α(P)=5.17×10-5 8
21/2-      847.0 7 (E2)0.01072α=0.01072, α(K)=0.00825 12, α(L)=0.00187 3, α(M)=0.000455 7, α(N)=0.0001176 17, α(O)=2.46×10-5 4, α(P)=3.17E-6 5
  2330.0 29/2+ 9.77 µs 21     285.8 2 E20.1527B(E2)(W.u.)=1.90E-4 14, α=0.1527, α(K)=0.0756 11, α(L)=0.0573 9, α(M)=0.01500 22, α(N)=0.00388 6, α(O)=0.000776 11, α(P)=8.52E-5 13
29/2+ 9.77 µs 21     365.8 2 E30.346B(E3)(W.u.)=21.0 16, α=0.346, α(K)=0.1151 17, α(L)=0.1702 25, α(M)=0.0460 7, α(N)=0.01198 17, α(O)=0.00240 4, α(P)=0.000263 4

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     09/2- 7.4 m 2 
% ε = 69 3
% α = 31 3
Q=-0.73 36, μ=+4.00 7
δ<r2>(203At,205At)=-0.115 fm2 7(stat)6(syst) (2018Cu02).
  3485.5(27/2+)   E(level): Dipole band.
  3619.3(29/2+)   E(level): Dipole band.
  3842.7(31/2+)   E(level): Dipole band.
  4102.1(33/2+)   E(level): Dipole band.
  4385.4(35/2+)   E(level): Dipole band.
  4638.8(37/2+)   E(level): Dipole band.
  4817.6(39/2+)   E(level): Dipole band.
  5011.2(41/2+)   E(level): Dipole band.
  5332.9(43/2+)   E(level): Dipole band.
  5713.9(45/2+)   E(level): Dipole band.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   221.40   221.4M(γ): K/LM=1.67 10 (2017Au05)
   648.64   648.6M(γ): A2>0 (2018Au01); A2=0.211 14, A4=-0.030 17 (1983Dy02)
   659.95   660.0M(γ): A2=-0.41 2, A4=0.05 2 (1983Dy02)
   683.4   462.0M(γ): K/LM=0.85 8 (2017Au05)
   871.81   211.9M(γ): A2=-0.098 19, A4=0.02 2 and α from intensity balance considerations (1983Dy02)
   223.2M(γ): A2=-0.03 5, A4=0.14 8 (1983Dy02)
   871.8M(γ): A2=0.16 5, A4=0.15 7 (1983Dy02)
  1225.23   576.5M(γ): A2>0 (2018Au01); A2=0.183 16, A4=-0.01 2 (1983Dy02)
  1303.6   442.2M(γ): A2>0 (2017Au05)
  1378.81   506.9M(γ): A2<0 (2018Au01); A2=-0.46 3, A4=-0.03 3 (1983Dy02)
  1503.8   200.1M(γ): A2(<0) (2017Au05)
   486.1M(γ): A2>0 (2017Au05)
  1633.15   254.3M(γ): A2<0 (2018Au01); A2=-0.3 1, A4=0.0 1 (1983Dy02)
   761.4M(γ): A2>0 (2018Au01); A2=0.18 4, A4=0.00 5 (1983Dy02)
  1636.3   411.2M(γ): A2>0 (2018Au01); DCO(gate on 577γ)=0.95 9 and DCO(gate on 649γ)=1.02 11 (1983Dy02)
  1695.38   316.5M(γ): A2<0 (2018Au01)
   823.7M(γ): A2>0 (2018Au01); A2=0.21 7, A4=-0.17 13 (1983Dy02)
  1870.0   566.4M(γ): A2>0 (2017Au05)
  1941.83   246.5M(γ): A2<0 (2018Au01)
   308.7M(γ): K/LM+ and A2<0 (2018Au01); A2=-0.26 3, A4=0.01 5 (1983Dy02)
  1964.3   328.1M(γ): A2<0 (2018Au01); DCO(gate on 411γ, 577γ and 649γ)=1.48 14 (1983Dy02)
  1980.4    38.5E(γ): Ordering of the 64- and 39-keV transitions is not firmly established.
I(γ): Ordering of the 64- and 39-keV transitions is not firmly established.
M(γ): From intensity balance
  1992.6    12.2E(γ): From level energy difference.
    50.6E(γ): From parallel γ-ray cascades depopulating the 3485.5-keV level: (1155.5 keV 8 + 285.8 keV 2 + 63.5 keV 3 + 38.5 keV 2) - (948.5 keV 7 + 544.2 keV 5)
  2044.2    63.5E(γ): Ordering of the 64- and 39-keV transitions is not firmly established.
I(γ): Ordering of the 64- and 39-keV transitions is not firmly established.
M(γ): From intensity balance (2018Au01)
    80.0E(γ): Derived from 285.8 keV 2 and 365.8 keV 2 γ-ray energies depopulating the 2330 keV isomer.
M(γ): from intensity balance (2018Au01)
E(level)E(gamma)Comments
  2072.0   435.5M(γ): A2>0 (2018Au01)
   847.0M(γ): A2>0 (2018Au01)
  2330.0   285.8M(γ): From K/LM+=0.99 22 (2018Au01)
   365.8M(γ): From K/LM+=0.55 8 (2018Au01)

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