ADOPTED LEVELS, GAMMAS for 214Pb

Authors: Shaofei Zhu and E. A. Mccutchan |  Citation: Nucl. Data Sheets 175, 1 (2021) |  Cutoff date: 1-May-2021 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=1018 keV 11S(n)= 5051 keV 7S(p)= 9.26×103 keV 3Q(α)= 2692 keV SY
Reference: 2021WA16

References:
  A  218Po α decay (3.097 M)  B  9Be(238U,xγ)

General Comments:

214Pb (RaB) was first identified as a descendent of 226Ra decay chain, by Rutherford and Barnes (1904Ru04) in a study of radiations from radium (226Ra), as reviewed in article 2013Fr04.

Q-value: ΔQ(α)=200 (2021Wa16)

Q-value: S(2n)=8776.7 20; S(2p)=17780 (syst) 300 (2021Wa16 )










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
       0.0AB 0+ 27.06 m 7 
% β- = 100
     
     835 1 AB (2+)     835
  100
[E2]
       0.0
0+
    1179 2  B (4+)     344
  100
[E2]
     835
(2+)
    1365 2  B (6+)     186
  100
[E2]
    1179
(4+)
  1365+X? B (8+) 6.2 µs 3 
% IT = 100
    X
  100
[E2]
    1365
(6+)

E(level): From Eγ values, assuming 1 keV uncertainty for each γ ray.

Jπ(level): The transitions in the yrast cascade are attributed to E2 transitions with the assumption that the isomer is predominantly a fully aligned pair of neutrons with a (g9/2})2 configuration (2012Go19).

E(γ): From 9Be(238U,Xγ).

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - Yrast cascade
       0.0 0+ 27.06 m 7 
% β- = 100
     
     835 1  (2+)     835
  100
[E2]
       0.0
0+
    1179 2  (4+)     344
  100
[E2]
     835
(2+)
    1365 2  (6+)     186
  100
[E2]
    1179
(4+)
  1365+X? (8+) 6.2 µs 3 
% IT = 100
    X
  100
[E2]
    1365
(6+)

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
     835 (2+)     835[E2]0.00953α=0.00953, α(K)=0.00745 11, α(L)=0.001582 23, α(M)=0.000380 6, α(N)=9.63×10-5 14, α(O)=1.87E-5 3, α(P)=1.732E-6 25
    1179 (4+)     344[E2]0.0777α=0.0777 13, α(K)=0.0474 8, α(L)=0.0228 4, α(M)=0.00581 11, α(N)=0.00147 3, α(O)=0.000272 5, α(P)=1.78×10-5 3
    1365 (6+)     186[E2]0.552α=0.552 14, α(K)=0.199 4, α(L)=0.264 8, α(M)=0.0691 19, α(N)=0.0174 5, α(O)=0.00315 9, α(P)=0.000153 4

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
       0.00+ 27.06 m 7 
% β- = 100
δ<r2>=+0.610 fm2 5 was deduced from the measured isotopic shift 11503 MHz 20 relative to 208Pb (1986An06).
E(level): δ<r2>=+0.610 fm2 5 was deduced from the measured isotopic shift 11503 MHz 20 relative to 208Pb (1986An06).

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Additional Gamma Comments:

E(level)E(gamma)Comments
  1365+X       XE(γ): transition to (6+) level was not seen in γ-ray spectra, x is assumed to be smaller than 88 keV based on the observation that the intensity of Kα x rays was only compatible with that from the internal conversion of the 6+ to 4+ transition (2012Go19).

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