ADOPTED LEVELS, GAMMAS for 193Po

Author: M. Shamsuzzoha Basunia |  Citation: Nucl. Data Sheets 143, 1 (2017) |  Cutoff date: 31-Mar-2017 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-8258 keV 26S(n)= 8326 keV 18S(p)= 2080 keV 30Q(α)= 7094 keV 4
Reference: 2017WA10

References:
  A  197Rn α decay (55 MS)  B  197Rn α decay (24 MS)
  C  160Dy(36Ar,3nγ) 

General Comments:

2013Se03, 2014Se07: beam of 193Po produced at the CERN ISOLDE facility by impinging 1.4 GeV protons on a 50 g/cm2 thick, UCx target. Reaction products diffused out and transferred to the RILIS. Deduced nuclear charge radius from the measured isotope shifts; magnetic dipole and electric quadrupole moments from measured hyperfine structure. Systematic uncertainties in δ|4r2|5 arising from electronic factor and mass-shift calculations are not included. Their magnitude is similar to the quoted experimental uncertainty

2015AnZZ: Measured 193Po production cross section, 5 μ 1, from 56Fe+141Pr fusion-evaporation reaction at E=50 MeV.

Levels: Identification: 185Re(19F,xn) excitation functions (1967Si09); 182W(20Ne,xn) excitation functions (1977De32); natCe(56Fe,xn) and 141Pr(56Fe,p3n) excitation function (1981Le23).

Levels: The level scheme is from 1999He32.









E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)Final Levels
     0.0A   (3/2-) 399 ms 34 
% α ≤ 100
    
   100 6  BC (13/2+) 245 ms 11 
% α ≤ 100
    
   351.4 5   C (17/2+)     251.4 5 
  100
   100
(13/2+)
   375.0 5   C (15/2+)     274.9 5 ?
  100
   100
(13/2+)
   712.3 7   C (21/2+)     360.9 5 
  100
   351.4
(17/2+)
   744.3 8   C (19/2+)     369 1 ?
  393 1 ?
  100 28 
   83 22 
   375.0
   351.4
(15/2+)
(17/2+)
  1176.0 9   C (25/2+)     463.7 5 
  100
   712.3
(21/2+)
  1229.7 10   C (23/2+)     485 1 ?
  518 1 ?
 
 
   744.3
   712.3
(19/2+)
(21/2+)

E(level): Level energies from a least-squares fit to adopted γ-ray energies, keeping energy of (13/2+) level fixed at 100 keV

Jπ(level): From 160Dy(36Ar,2nγ) unless otherwise noted. The assignments are based on band structures

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 1 - Band based on (13/2+)
   100 6  (13/2+) 245 ms 11 
% α ≤ 100
    
   351.4 5  (17/2+)       
   712.3 7  (21/2+)     360.9 5 
  100
   351.4
(17/2+)
  1176.0 9  (25/2+)     463.7 5 
  100
   712.3
(21/2+)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 2 - Band based on (15/2+)
   375.0 5  (15/2+)       
   744.3 8  (19/2+)       
  1229.7 10  (23/2+)     485 1 ?
  518 1 ?
 
 
   744.3
   712.3
(19/2+)
(21/2+)

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.0(3/2-) 399 ms 34 
% α ≤ 100
μ=-0.389 37 (2014Se07), Q=-1.31 30 (2014Se07)
δν(193Po,196Po)=-0.59 GHz 15; δ|4r2|5(193Po,210Po)=-0.576 fm2 13 (2013Se03). The uncertainties are statistical only.
E(level): δν(193Po,196Po)=-0.59 GHz 15; δ|4r2|5(193Po,210Po)=-0.576 fm2 13 (2013Se03). The uncertainties are statistical only.
Jπ(level): From systematics and from shell model two isomers are expected in a n=109 nucleus: high spin 1i13/2, and low spin 3p3/2 (189Hg).
   100(13/2+) 245 ms 11 
% α ≤ 100
μ=-0.742 65 (2014Se07), Q=+1.08 50 (2014Se07)
δν(193Po,196Po)=-1.11 GHz 15; δ|4r2|5(193Po,210Po)=-0.532 fm2 13 (2013Se03) The uncertainties are statistical only.
E(level): δν(193Po,196Po)=-1.11 GHz 15; δ|4r2|5(193Po,210Po)=-0.532 fm2 13 (2013Se03) The uncertainties are statistical only. Band based on (13/2+).
Jπ(level): From systematics and from shell model two isomers are expected in a n=109 nucleus: high spin 1i13/2, and low spin 3p3/2 (189Hg).
   351.4(17/2+)   E(level): Band based on (13/2+).
   375.0(15/2+)   E(level): Band based on (15/2+).
   712.3(21/2+)   E(level): Band based on (13/2+).
   744.3(19/2+)   E(level): Band based on (15/2+).
  1176.0(25/2+)   E(level): Band based on (13/2+).
  1229.7(23/2+)   E(level): Band based on (15/2+).

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