ADOPTED LEVELS, GAMMAS for 220Rn

Authors: E. Browne, J. K. Tuli |  Citation: Nucl. Data Sheets 112, 1115 (2011) |  Cutoff date: 31-Oct-2010 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-870 keV 4S(n)= 6288.6 keV 23S(p)= 7073 keV 4Q(α)= 6404.66 keV 10
Reference: 2012WA38

References:
  A  220At β- decay  B  232Th(136Xe,xγ)
  C  224Ra α decay 

General Comments:

Historic Note: This isotope was originally called Thoron with symbol Tn.

Mass measurements: Penning-trap mass spectrometer (2009Ne03); Schottky mass spectrometry (2005LiZZ).

γ-ray linear polarization following α decay (2005JoZY).

Calculations, compilations, systematics:

14C decay rate: 1986De32

Cluster model for α decay, Geiger-Nuttall plot: 1991Bu05

α decay: 2006StZX, 2003Da24, 1997Al22, 1996Wi27, 1992De44.

Effect of octupole and 26 pole deformation on binding energies: 1986Ch23

Equilibrium deformation energy: 1988So08, 1984Na22

Kπ=0+ and Kπ=0- bands: 1980Sh07

Levels, β(|l) ratios: 1995De13

n-p interaction energy: 1990Mo11

Quasibands in even-even nuclei: 1984Sa37

Single-particle levels: 1984So09

Spontaneous emission of heavy ions: 1986Po06

Super- and hyper-deformed configurations: 1995We02

Q-value: Note: Current evaluation has used the following Q record










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0ABC 0+ 55.6 s 1 
% α = 100
     
   240.986 6 ABC 2+ 0.146 ns 5    240.986 6 
  100
E2
     0
0+
   533.68 10 ABC 4+     292.70 10 
  100
(E2)
   240.986
2+
   645.44 9 ABC 1-     404.2 2 
  645.50 10 
   41 10 
  100 17 


   240.986
     0
2+
0+
   663.03 10 ABC (3-)     422.04 10 
  100

   240.986
2+
   851.9 4  B  (5-)     188.8 5 
  318.3 5 
   25 8 
  100 15 
E2
E1
   663.03
   533.68
(3-)
4+
   873.88 22  B  (6+)     340.2 2 
  100
E2
   533.68
4+
  1128.2 4  B  (7-)     254.3 5 
  276.2 5 
   41 10 
  100 2 
E1
E2
   873.88
   851.9
(6+)
(5-)
  1244.3 3  B  (8+)     370.4 2 
  100
E2
   873.88
(6+)
  1462.1 5  B  (9-)     217.9 5 
  333.9 5 
   14 4 
  100 15 
E1
E2
  1244.3
  1128.2
(8+)
(7-)
  1631.1 4  B  (10+)     386.8 2 
  100
E2
  1244.3
(8+)
  1834.0 7  B  (11-)     371.9 5 
  100
E2
  1462.1
(9-)
  2033.9 7  B  (12+)     402.8 5 
  100
E2
  1631.1
(10+)
  2227.1 9  B  (13-)     393.1 5 
  100
E2
  1834.0
(11-)
  2452.7 8  B  (14+)     418.8 5 
  100
E2
  2033.9
(12+)
  2638.3 10  B  (15-)     411.2 5 
  100
E2
  2227.1
(13-)
  2887.0 10  B  (16+)     434.3 5 
  100
E2
  2452.7
(14+)
  3068.6 11  B  (17-)     430.3 5 
  100
E2
  2638.3
(15-)
  3325.3 11  B  (18+)     438.3 5 
 

  2887.0
(16+)
  3509.8 12  B  (19-)     441.2 5 
  100
E2
  3068.6
(17-)
  3763.9 12  B  (20+)     438.6 5 
 

  3325.3
(18+)
  3961.5 13 ? B  (21-)     451.7 5 
 

  3509.8
(19-)

E(level): Deduced by evaluators from least-squares fit to adopted γ-ray energies.

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - GS Kπ=0+ ROTATIONAL band
     0 0+ 55.6 s 1 
% α = 100
     
   240.986 6  2+ 0.146 ns 5    240.986 6 
  100
E2
     0
0+
   533.68 10  4+     292.70 10 
  100
(E2)
   240.986
2+
   873.88 22  (6+)     340.2 2 
  100
E2
   533.68
4+
  1244.3 3  (8+)     370.4 2 
  100
E2
   873.88
(6+)
  1631.1 4  (10+)     386.8 2 
  100
E2
  1244.3
(8+)
  2033.9 7  (12+)     402.8 5 
  100
E2
  1631.1
(10+)
  2452.7 8  (14+)     418.8 5 
  100
E2
  2033.9
(12+)
  2887.0 10  (16+)     434.3 5 
  100
E2
  2452.7
(14+)
  3325.3 11  (18+)     438.3 5 
 

  2887.0
(16+)
  3763.9 12  (20+)     438.6 5 
 

  3325.3
(18+)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - Kπ=0- γ VIBRATIONAL band
   645.44 9  1-        
   663.03 10  (3-)     422.04 10 
  100

   240.986
2+
   851.9 4  (5-)     188.8 5 
  318.3 5 
   25 8 
  100 15 
E2
E1
   663.03
   533.68
(3-)
4+
  1128.2 4  (7-)     254.3 5 
  276.2 5 
   41 10 
  100 2 
E1
E2
   873.88
   851.9
(6+)
(5-)
  1462.1 5  (9-)     217.9 5 
  333.9 5 
   14 4 
  100 15 
E1
E2
  1244.3
  1128.2
(8+)
(7-)
  1834.0 7  (11-)     371.9 5 
  100
E2
  1462.1
(9-)
  2227.1 9  (13-)     393.1 5 
  100
E2
  1834.0
(11-)
  2638.3 10  (15-)     411.2 5 
  100
E2
  2227.1
(13-)
  3068.6 11  (17-)     430.3 5 
  100
E2
  2638.3
(15-)
  3509.8 12  (19-)     441.2 5 
  100
E2
  3068.6
(17-)
  3961.5 13  (21-)     451.7 5 
 

  3509.8
(19-)

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
   240.986 2+ 0.146 ns 5    240.986 6 E20.276B(E2)(W.u.)=47.6 17, α=0.276
   533.68 4+     292.70 10 (E2)0.1487α=0.1487
   851.9 (5-)     188.8 5 E20.644α=0.644 11
(5-)     318.3 5 E10.0291α=0.0291
   873.88 (6+)     340.2 2 E20.0956α=0.0956
  1128.2 (7-)     254.3 5 E10.0487α=0.0487
(7-)     276.2 5 E20.178α=0.178 3
  1244.3 (8+)     370.4 2 E20.0755α=0.0755
  1462.1 (9-)     217.9 5 E10.0701α=0.0701
(9-)     333.9 5 E20.1008α=0.1008
  1631.1 (10+)     386.8 2 E20.0671α=0.0671
  1834.0 (11-)     371.9 5 E20.0746α=0.0746
  2033.9 (12+)     402.8 5 E20.0603α=0.0603
  2227.1 (13-)     393.1 5 E20.0643α=0.0643
  2452.7 (14+)     418.8 5 E20.0545α=0.0545
  2638.3 (15-)     411.2 5 E20.0572α=0.0572
  2887.0 (16+)     434.3 5 E20.0497α=0.0497
  3068.6 (17-)     430.3 5 E20.0509α=0.0509
  3509.8 (19-)     441.2 5 E20.0478α=0.0478

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     00+ 55.6 s 1 
% α = 100
E(level): GS Kπ=0+ ROTATIONAL band.
   240.9862+ 0.146 ns 5  E(level): GS Kπ=0+ ROTATIONAL band.
   533.684+   E(level): GS Kπ=0+ ROTATIONAL band.
   645.441-   E(level): Kπ=0- γ VIBRATIONAL band.
   663.03(3-)   E(level): Kπ=0- γ VIBRATIONAL band.
   851.9(5-)   E(level): Kπ=0- γ VIBRATIONAL band.
   873.88(6+)   E(level): GS Kπ=0+ ROTATIONAL band.
  1128.2(7-)   E(level): Kπ=0- γ VIBRATIONAL band.
  1244.3(8+)   E(level): GS Kπ=0+ ROTATIONAL band.
  1462.1(9-)   E(level): Kπ=0- γ VIBRATIONAL band.
  1631.1(10+)   E(level): GS Kπ=0+ ROTATIONAL band.
  1834.0(11-)   E(level): Kπ=0- γ VIBRATIONAL band.
  2033.9(12+)   E(level): GS Kπ=0+ ROTATIONAL band.
  2227.1(13-)   E(level): Kπ=0- γ VIBRATIONAL band.
  2452.7(14+)   E(level): GS Kπ=0+ ROTATIONAL band.
  2638.3(15-)   E(level): Kπ=0- γ VIBRATIONAL band.
  2887.0(16+)   E(level): GS Kπ=0+ ROTATIONAL band.
  3068.6(17-)   E(level): Kπ=0- γ VIBRATIONAL band.
  3325.3(18+)   E(level): GS Kπ=0+ ROTATIONAL band.
  3509.8(19-)   E(level): Kπ=0- γ VIBRATIONAL band.
  3763.9(20+)   E(level): GS Kπ=0+ ROTATIONAL band.
  3961.5(21-)   E(level): Kπ=0- γ VIBRATIONAL band.

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