ADOPTED LEVELS, GAMMAS for 234Pa

Author: S. Ota |  Citation: Nucl. Data Sheets 207, 351 (2026) |  Cutoff date: 1-Dec-2023 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=2194 keV 4S(n)= 5222 keV 4S(p)= 5682 keV 4Q(α)= 4076 keV 16
Reference: 2021WA16

References:
  A  234Th β- decay  B  234Pa IT decay (1.159 M)








E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
    0.0AB 4+ 6.70 h 5 
% β- = 100
     
   73.920 20 AB (3+)      73.92 2 
 
(M1+E2)
    0.0
4+
   76.5 4 AB (0-) 1.159 m 11 
% IT = 0.16 4
% β- = 99.84 4
    2.6 5 S
 

   73.920
(3+)
  106.0 4 A  (2-) < 0.5 ns    29.49 2 
  106.0 5 ?
  100 8 
   ≈0.25
E2
[M2]
   76.5
    0.0
(0-)
4+
  168.9 4 A  (1-) ≤ 0.1 ns    62.86 2 
   92.367 5 
    0.75 12 
  100 6 
M1+E2
M1
  106.0
   76.5
(2-)
(0-)
  169.3 4 A  (1+) 0.55 ns 10     63.282 2 
   92.792 5 
  100 10 
   57 4 
E1
E1
  106.0
   76.5
(2-)
(0-)
  179.9 4 ?A       73.92?
  103.35 10 
 
 


  106.0
   76.5
(2-)
(0-)
  189.3 4 A  (1+)      20.02 2 
   83.30 5 
  112.81 5 
    3.6 10 
   28.6 15 
  100 8 
M1+E2


  169.3
  106.0
   76.5
(1+)
(2-)
(0-)
  261.3 4 A  (1+)      92.00 5 
  184.8
    0.080
  100 50 


  169.3
   76.5
(1+)
(0-)

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

Jπ(level): From 234Th β- decay unless otherwise noted

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Additional Gamma Data:















E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
   73.920 (3+)      73.92 2 (M1+E2)0.11 310.57α=10.57 33, α(L)=7.96 24, α(M)=1.94 7, α(N)=0.520 18, α(O)=0.124 4, α(P)=0.0235 7, α(Q)=0.001854 28
  106.0 (2-) < 0.5 ns    29.49 2 E2 4.40×103B(E2)(W.u.)>132, α=4.40E3 6, α(L)=3.22E3 5, α(M)=882 13, α(N)=237.2 34, α(O)=53.4 8, α(P)=8.54 12, α(Q)=0.01691 24
(2-) < 0.5 ns   106.0 5 [M2] 52.1B(M2)(W.u.)>0.031, α=52.1 13, α(L)=38.1 9, α(M)=10.37 26, α(N)=2.85 7, α(O)=0.678 17, α(P)=0.1248 31, α(Q)=0.00884 21
  168.9 (1-) ≤ 0.1 ns    62.86 2 M1+E20.33 825B(E2)(W.u.)≥3.6, B(M1)(W.u.)≥6.9E-4, α=25 4, α(L)=19.0 31, α(M)=4.8 9, α(N)=1.30 24, α(O)=0.30 5, α(P)=0.054 8, α(Q)=0.00277 12
(1-) ≤ 0.1 ns    92.367 5 M1 5.27B(M1)(W.u.)≥0.042, α=5.27 7, α(L)=3.98 6, α(M)=0.961 13, α(N)=0.258 4, α(O)=0.0618 9, α(P)=0.01181 17, α(Q)=0.000978 14
  169.3 (1+) 0.55 ns 10     63.282 2 E1 0.405B(E1)(W.u.)=0.00062 +14-10, α=0.405 6, α(L)=0.305 4, α(M)=0.0750 10, α(N)=0.01974 28, α(O)=0.00447 6, α(P)=0.000737 10, α(Q)=3.14E-5 4
(1+) 0.55 ns 10     92.792 5 E1 0.1473B(E1)(W.u.)=1.12E-4 +27-19, α=0.1473 21, α(L)=0.1111 16, α(M)=0.0271 4, α(N)=0.00716 10, α(O)=0.001643 23, α(P)=0.000281 4, α(Q)=1.370E-5 19
  189.3 (1+)      20.02 2 M1+E20.08 22.4×102α=2.4×102 7, α(L)=7.E1 4, α(M)=124 21, α(N)=33 6, α(O)=7.8 13, α(P)=1.42 20, α(Q)=0.0885 13

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
   76.5(0-) 1.159 m 11 
% IT = 0.16 4
% β- = 99.84 4
See 1.159-min 234Pa IT decay for references and methods of obtaining the branching ratios.
E(level): See 1.159-min 234Pa IT decay for references and methods of obtaining the branching ratios.
  169.3(1+) 0.55 ns 10  Jπ(level): π 3/2[651], ν 1/2[631] and π 1/2[660], ν 1/2[631] are possible configurations for the 169.32 and 189.33 levels.
  189.3(1+)   Jπ(level): π 3/2[651], ν 1/2[631] and π 1/2[660], ν 1/2[631] are possible configurations for the 169.32 and 189.33 levels.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   73.920   73.92E(γ): Multiply placed
   76.5    2.6E(γ): deduced by 2016Ri06 from observation of a 106γ. Evaluators consider it as a tentative energy due to tentative placement of 106γ. Transition was not observed. Its energy was deduced to be <10 keV from a limit on experimental detection (1973Go40). See 234Th β- decay.
  179.9   73.92E(γ): Multiply placed

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