ADOPTED LEVELS, GAMMAS for 187Pb

Author: M. S. Basunia |  Citation: Nucl. Data Sheets 110, 999 (2009) |  Cutoff date: 1-Nov-2008 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-8607 keV 17S(n)= 8370 keV 14S(p)= 208×101 keV 18Q(α)= 6395 keV 6
Reference: 2003AU03

References:
  A  191Po α decay (22 MS)  B  191Po α decay (93 MS)
  C  155Gd(36Ar,4nγ) 








E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0ABC (3/2-) 15.2 s 3 
% α = 9.5 20
% ε = 90.5 20
     
    33 13 ABC (13/2+) 18.3 s 3 
% ε = 88 2
% α = 12 2
     
   375.0 10 A   (3/2-) < 10 ns   375 1 
  100
(E0+M1+E2)
     0.0
(3/2-)
   505.0 10  B  (9/2+)     472 1 
  100
(E2)
    33
(13/2+)
   527.0 10  B  (13/2+) < 10 ns   494 1 
  100
(M1)
    33
(13/2+)
   607 15  B  (9/2+)      80 15 S
  100
(E2)
   527.0
(13/2+)
   627.0 10 ? B      594 1 ?
  100

    33
(13/2+)
   864  C (17/2+)     831
  100

    33
(13/2+)
  1280  C (21/2+)     416
  100

   864
(17/2+)
  1756  C (25/2+)     476
  100

  1280
(21/2+)

E(level): From γ-ray energies.

Jπ(level): Values given without comment are from (36Ar,4nγ), based on analogy with heavier odd-A Pb isotopes in which a sequence of three stretched Q transitions connect the yrast 25/2+ state to a low-energy 13/2+ isomer.

E(γ): From (36Ar,4nγ), except otherwise noted.

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - π=+ yrast STATES (1998Ba88).
    33 13  (13/2+) 18.3 s 3 
% ε = 88 2
% α = 12 2
     
   864 (17/2+)        
  1280 (21/2+)     416
  100

   864
(17/2+)
  1756 (25/2+)     476
  100

  1280
(21/2+)

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
   375.0 (3/2-) < 10 ns   375 1 (E0+M1+E2)1.1α1.1 AP
   505.0 (9/2+)     472 1 (E2)0.0338α=0.0338
   527.0 (13/2+) < 10 ns   494 1 (M1)0.1115B(M1)(W.u.)>1.6×10-5, α=0.1115
   607 (9/2+)      80 15 (E2)2.E1α=2.E1 3

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.0(3/2-) 15.2 s 3 
% α = 9.5 20
% ε = 90.5 20
Δ<r2>(187Pb,208Pb)=-0.993 10 fm2 (2007De09).
    33(13/2+) 18.3 s 3 
% ε = 88 2
% α = 12 2
Δ<r2>(187Pb,208Pb)=-1.025 10 fm2 (2007De09).
E(level): From 191Po α decay (22 ms). π=+ yrast STATES (1998Ba88).
   375.0(3/2-) < 10 ns T1/2(level): Limit deduced from observation of αγ prompt coincidence in 191Po α decay.
   527.0(13/2+) < 10 ns T1/2(level): Limit deduced from observation of αγ prompt coincidence in 191Po α decay.
   864(17/2+)   E(level): From 191Po α decay (22 ms). π=+ yrast STATES (1998Ba88).
  1280(21/2+)   E(level): From 191Po α decay (22 ms). π=+ yrast STATES (1998Ba88).
  1756(25/2+)   E(level): From 191Po α decay (22 ms). π=+ yrast STATES (1998Ba88).

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Additional Gamma Comments:

E(level)E(gamma)Comments
   375.0   375E(γ): From 191Po α decay (22 ms)
M(γ): From α(K)exp=0.88 30 (2002An19)
   505.0   472E(γ): From 191Po α decay (93 ms)
M(γ): from α(K)exp|<0.06
   527.0   494E(γ): From 191Po α decay (93 ms)
M(γ): from α(K)exp 0.076 20
   627.0   594E(γ): From 191Po α decay (93 ms)

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