ADOPTED LEVELS, GAMMAS for 218Ac

Authors: Balraj Singh, M.S. Basunia, Murray Martin Et Al., |  Citation: Nucl. Data Sheets 160, 405 (2019) |  Cutoff date: 30-Oct-2019 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-1520 keV 50S(n)= 5930 keV 50S(p)= 2340 keV 50Q(α)= 9380 keV 50
Reference: 2017WA10

References:
  A  222Pa α decay (4.1 MS)  B  209Bi(12C,3nγ)

General Comments:

Assignment: daughter of 222Pa α decay (1970Bo13)

Theory references: consult NSR database (www.nndc.bnl.gov/nsr/) for 15 primary references for calculations of half-lives of radioactive decays, and two for nuclear structure.

Review of level data for nuclides with reflection asymmetry: 1996Bu45

Q-value: S(2n)=13440 50, S(2p)=6710 50 (2017Wa10)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0   (1-) 1.03 µs 5 
% α = 100
     
   0+X B        
   122.5+X 2  B     122.5 2 
  100
M1
   0+X

   122.5+Y B (9-) 32 ns 9 
% IT = 100
    ZS
 

   122.5+X

  ≈193A         
   226.90+Y 24  B (9-)        
  ≈407A         
   416.10+Y 14  B (10-)     189.2 2 
  293.6 2 
  100 9 
   24 3 
M1
(M1)
   226.90+Y
   122.5+Y
(9-)
(9-)
   506.99+Y 13  B (11+) 103 ns 11 
% IT = 100
   91.0 2 
  384.5 2 
   85.3 24 
  100.0 14 
(E1)
M2
   416.10+Y
   122.5+Y
(10-)
(9-)
  ≈529A         
  ≈560A         
  ≈580A         
   600.94+Y 16  B (10-)     478.5 2 
  100
M1
   122.5+Y
(9-)
   630.38+Y 14  B (11-)     507.8 2 
  100
E2
   122.5+Y
(9-)
   681.98+Y 14  B (11+)      81.1 2 
  175.0 2 
  265.8 2 
   24 10 
   26 10 
  100 14 
(E1)
M1
E1
   600.94+Y
   506.99+Y
   416.10+Y
(10-)
(11+)
(10-)
   789.16+Y 15  B (12+)     107.0 2 
  158.8 2 
  282.3 2 
    7.8 22 
  100 13 
   15 4 
(M1+E2)
E1
M1
   681.98+Y
   630.38+Y
   506.99+Y
(11+)
(11-)
(11+)
   990.45+Y 15  B (12-)     308.5 2 
  360.0 2 
  574.3 2 
   13.8 25 
    2.9 10 
  100 6 
D
[M1]
E2
   681.98+Y
   630.38+Y
   416.10+Y
(11+)
(11-)
(10-)
  1044.89+Y 17  B (13+)     537.9 2 
  100
E2
   506.99+Y
(11+)
  1088.50+Y 17  B (13-)     299.3 2 
  458.1 2 
  100 10 
   50 4 
E1
Q
   789.16+Y
   630.38+Y
(12+)
(11-)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  1181.93+Y 17  B (13+)     137.0 2 
  191.4 2 
  500.1 2 
    3.3 9 
   74 8 
  100 7 
[M1+E2]
(E1)
E2
  1044.89+Y
   990.45+Y
   681.98+Y
(13+)
(12-)
(11+)
  1258.07+Y 19  B (14+)     169.5 2 
  468.9 2 
   64 4 
  100 11 
E1
Q
  1088.50+Y
   789.16+Y
(13-)
(12+)
  1335.86+Y 22  B (14-)     291.0 2 
  100
D
  1044.89+Y
(13+)
  1418.54+Y 17  B (14-)     236.6 2 
  330.1 2 
  373.5 2 
  428.1 2 
   76 5 
   35 4 
    8 3 
  100 7 
E1
M1
D
Q
  1181.93+Y
  1088.50+Y
  1044.89+Y
   990.45+Y
(13+)
(13-)
(13+)
(12-)
  1509.83+Y 19  B (15+)     174.0 2 
  465.1 2 
   25 5 
  100 6 
(E1)
E2
  1335.86+Y
  1044.89+Y
(14-)
(13+)
  1557.23+Y 19  B (15-)     299.1 2 
  468.7 2 
  100 10 
   36 5 
E1
Q
  1258.07+Y
  1088.50+Y
(14+)
(13-)
  1625.41+Y 19  B (15+)     115.6 2 
  206.8 2 
  443.5 2 
    6.5 32 
   90 12 
  100 14 
[M1+E2]
(E1)
E2
  1509.83+Y
  1418.54+Y
  1181.93+Y
(15+)
(14-)
(13+)
  1697.60+Y 23  B (16+)     140.4 2 
  439.5 2 
   45 4 
  100 6 
E1
E2
  1557.23+Y
  1258.07+Y
(15-)
(14+)
  1789.45+Y 19  B (16-)     164.0 2 
  232.1 2 
  279.8 2 
  370.9 2 
   12.7 10 
   15.3 13 
  100
  100 9 
E1
M1
(E1)
E2
  1625.41+Y
  1557.23+Y
  1509.83+Y
  1418.54+Y
(15+)
(15-)
(15+)
(14-)
  1843.1+Y 3  B (16-)     333.2 2 
  507.0?
  100 18 
 
D

  1509.83+Y
  1335.86+Y
(15+)
(14-)
  1939.4+Y 3  B (17+)      96.2 2 
  429.6 2 
   48 16 
  100 11 
(E1)
Q
  1843.1+Y
  1509.83+Y
(16-)
(15+)
  1990.2+Y 3  B (17+)     200.7 2 
  100
E1
  1789.45+Y
(16-)
  2025.8+Y 3  B (17+)     236.1?
  400.4 2 
 
  100 24 

Q
  1789.45+Y
  1625.41+Y
(16-)
(15+)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  2121.0+Y 4  B (18-)     181.5?
  277.9 2 
 
  100 38 

[E2]
  1939.4+Y
  1843.1+Y
(17+)
(16-)
  2141.0+Y 3  B (18+)     443.4 2 
  100
Q
  1697.60+Y
(16+)
  2239.6+Y 4  B (19+)     300.2 2 
  100
(Q)
  1939.4+Y
(17+)
  2630.2+Y 4  B (20+)     489.2 2 
  100
(Q)
  2141.0+Y
(18+)

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

Jπ(level): All assignments are made from the γ-ray multipolarities, E1, E2, M1 branching ratios, and shell-model considerations and band associations. For high-spin (J>10) levels, ascending order of spins with excitation energy is assumed.

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - Band based on (9-), s=+1.
   122.5+Y (9-) 32 ns 9 
% IT = 100
     
   630.38+Y 14  (11-)        
  1088.50+Y 17  (13-)     299.3 2 
  458.1 2 
  100 10 
   50 4 
E1
Q
   789.16+Y
   630.38+Y
(12+)
(11-)
  1557.23+Y 19  (15-)     299.1 2 
  468.7 2 
  100 10 
   36 5 
E1
Q
  1258.07+Y
  1088.50+Y
(14+)
(13-)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - Band based on (12+), s=+1.
   789.16+Y 15  (12+)        
  1258.07+Y 19  (14+)        
  1697.60+Y 23  (16+)     140.4 2 
  439.5 2 
   45 4 
  100 6 
E1
E2
  1557.23+Y
  1258.07+Y
(15-)
(14+)
  2141.0+Y 3  (18+)     443.4 2 
  100
Q
  1697.60+Y
(16+)
  2630.2+Y 4  (20+)        
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - Band based on (12-), s=-1.
   990.45+Y 15  (12-)        
  1418.54+Y 17  (14-)        
  1789.45+Y 19  (16-)     164.0 2 
  232.1 2 
  279.8 2 
  370.9 2 
   12.7 10 
   15.3 13 
  100
  100 9 
E1
M1
(E1)
E2
  1625.41+Y
  1557.23+Y
  1509.83+Y
  1418.54+Y
(15+)
(15-)
(15+)
(14-)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 4 - Band based on (11+), s=-1.
   681.98+Y 14  (11+)        
  1181.93+Y 17  (13+)        
  1625.41+Y 19  (15+)     115.6 2 
  206.8 2 
  443.5 2 
    6.5 32 
   90 12 
  100 14 
[M1+E2]
(E1)
E2
  1509.83+Y
  1418.54+Y
  1181.93+Y
(15+)
(14-)
(13+)
  2025.8+Y 3  (17+)     236.1?
  400.4 2 
 
  100 24 

Q
  1789.45+Y
  1625.41+Y
(16-)
(15+)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 5 - Band based on (11+), s=-1.
   506.99+Y 13  (11+) 103 ns 11 
% IT = 100
     
  1044.89+Y 17  (13+)        
  1509.83+Y 19  (15+)     174.0 2 
  465.1 2 
   25 5 
  100 6 
(E1)
E2
  1335.86+Y
  1044.89+Y
(14-)
(13+)
  1939.4+Y 3  (17+)      96.2 2 
  429.6 2 
   48 16 
  100 11 
(E1)
Q
  1843.1+Y
  1509.83+Y
(16-)
(15+)
  2239.6+Y 4  (19+)        
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 6 - Band based on (14-), s=-1.
  1335.86+Y 22  (14-)        
  1843.1+Y 3  (16-)        
  2121.0+Y 4  (18-)     181.5?
  277.9 2 
 
  100 38 

[E2]
  1939.4+Y
  1843.1+Y
(17+)
(16-)

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
   122.5+X     122.5 2 M19.56α=9.56
   416.10+Y (10-)     189.2 2 M12.79α=2.79
(10-)     293.6 2 (M1)0.820α=0.820
   506.99+Y (11+) 103 ns 11 
% IT = 100
   91.0 2 (E1)0.1461B(E1)(W.u.)=6.5E-7 8, α=0.1461 23
(11+) 103 ns 11 
% IT = 100
  384.5 2 M21.201B(M2)(W.u.)=0.31 4, α=1.201
   600.94+Y (10-)     478.5 2 M10.217α=0.217
   630.38+Y (11-)     507.8 2 E20.0392α=0.0392
   681.98+Y (11+)      81.1 2 (E1)0.198α=0.198
(11+)     175.0 2 M13.48α=3.48
(11+)     265.8 2 E10.0476α=0.0476
   789.16+Y (12+)     158.8 2 E10.1601α=0.1601
(12+)     282.3 2 M10.914α=0.914
   990.45+Y (12-)     360.0 2 [M1]0.469α=0.469
(12-)     574.3 2 E20.0295α=0.0295
  1044.89+Y (13+)     537.9 2 E20.0342α=0.0342
  1088.50+Y (13-)     299.3 2 E10.0364α=0.0364
  1181.93+Y (13+)     137.0 2 [M1+E2]4.8α=4.8 22
(13+)     191.4 2 (E1)0.1024α=0.1024
(13+)     500.1 2 E20.0406α=0.0406
  1258.07+Y (14+)     169.5 2 E10.1369α=0.1369
  1418.54+Y (14-)     236.6 2 E10.0622α=0.0622
(14-)     330.1 2 M10.595α=0.595
  1509.83+Y (15+)     174.0 2 (E1)0.1286α=0.1286
(15+)     465.1 2 E20.0483α=0.0483
  1557.23+Y (15-)     299.1 2 E10.0364α=0.0364
E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
  1625.41+Y (15+)     115.6 2 [M1+E2]8.4α=8.4 29
(15+)     206.8 2 (E1)0.0853α=0.0853
(15+)     443.5 2 E20.0544α=0.0544
  1697.60+Y (16+)     140.4 2 E10.215α=0.215
(16+)     439.5 2 E20.0556α=0.0556
  1789.45+Y (16-)     164.0 2 E10.1482α=0.1482
(16-)     232.1 2 M11.574α=1.574
(16-)     279.8 2 (E1)0.0423α=0.0423
(16-)     370.9 2 E20.0868α=0.0868
  1939.4+Y (17+)      96.2 2 (E1)0.1262α=0.1262 19
  1990.2+Y (17+)     200.7 2 E10.0915α=0.0915
  2121.0+Y (18-)     277.9 2 [E2]0.203α=0.203

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
   122.5+Y(9-) 32 ns 9 
% IT = 100
E(level): Band based on (9-), s=+1.
   506.99+Y(11+) 103 ns 11 
% IT = 100
E(level): Band based on (11+), s=-1.
   630.38+Y(11-)   E(level): Band based on (9-), s=+1.
   681.98+Y(11+)   E(level): Band based on (11+), s=-1.
   789.16+Y(12+)   E(level): Band based on (12+), s=+1.
   990.45+Y(12-)   E(level): Band based on (12-), s=-1.
  1044.89+Y(13+)   E(level): Band based on (11+), s=-1.
  1088.50+Y(13-)   E(level): Band based on (9-), s=+1.
  1181.93+Y(13+)   E(level): Band based on (11+), s=-1.
  1258.07+Y(14+)   E(level): Band based on (12+), s=+1.
  1335.86+Y(14-)   E(level): Band based on (14-), s=-1.
  1418.54+Y(14-)   E(level): Band based on (12-), s=-1.
  1509.83+Y(15+)   E(level): Band based on (11+), s=-1.
  1557.23+Y(15-)   E(level): Band based on (9-), s=+1.
  1625.41+Y(15+)   E(level): Band based on (11+), s=-1.
  1697.60+Y(16+)   E(level): Band based on (12+), s=+1.
  1789.45+Y(16-)   E(level): Band based on (12-), s=-1.
  1843.1+Y(16-)   E(level): Band based on (14-), s=-1.
  1939.4+Y(17+)   E(level): Band based on (11+), s=-1.
  2025.8+Y(17+)   E(level): Band based on (11+), s=-1.
  2121.0+Y(18-)   E(level): Band based on (14-), s=-1.
  2141.0+Y(18+)   E(level): Band based on (12+), s=+1.
  2239.6+Y(19+)   E(level): Band based on (11+), s=-1.
  2630.2+Y(20+)   E(level): Band based on (12+), s=+1.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   122.5+Y     ZE(γ): z corresponds to either one or more gamma rays, with energy of <100 keV
  1843.1+Y   507.0E(γ): this γ is expected but not seen with certainty probably because it is obscured by strong 507.8γ

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