ADOPTED LEVELS, GAMMAS for 222Rn

Authors: Sukhjeet Singh, A. K. Jain, Jagdish K. Tuli |  Citation: Nucl. Data Sheets 112,2851 (2011) |  Cutoff date: 31-Mar-2011 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=24 keV 22S(n)= 6170 keV 6S(p)= 7698 keV 15Q(α)= 5590.3 keV 4
Reference: 2012WA38

References:
  A  226Ra α decay  B  (HI,xnγ)

General Comments:

Potential energy and equilibrium deformations were calculated by 1994Li05, 1988So08, 1984Na22, 1983Ro14, 1982Le19, 1981Gy03. The nuclear binding energies were calculated and incipiency of deformation in this region is discussed in 1986Ch23.

See 1983Ro14 for calculations of static quadrupole and hexadecapole moments.

2010Li02 measures mass values using Schottky mass spectrometry.

See 2009Qi07, 2004Re22 for predictions of cluster decay and its half-life. See 1989De11 for discussions on octupole deformation and E1 transitions.

See 1987Ro08 for calculation of single-particle states and dipole moments as a function of octupole deformation, and for B(E1)/B(E2) values at the equilibrium octupole deformation.

Higher order of deformations were considered by 1995De13; the level energies of the 2+, 4+ states in the g.s. band and the 1-,3- states in the octupole-vibrational band were calculated. See 1995De13 for calculations, discussions and comparison with experiments. See 1998Ra05 for calculations of level energies. Others: 2001Za04, 2001Za09. See 2003Ga34 for calculations of ground state properties.

Levels: The Kπ=0+ g.s. band and the Kπ=0- band at 600.66 keV have been interpreted as octupole parity-doublet bands. This nucleus falls in the middle of the region of octupole deformation defined by the spin systematics for octupole shapes (1990Ja11).

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

Q-value: Estimated ΔS(p)=200 (2003Au03,2011AuZZ)










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0.0AB 0+ 3.8235 d 3 
% α = 100
     
   186.211 13 AB 2+ 0.32 ns 2    186.4 2 
  100 15 
E2
     0.0
0+
   448.37 12 AB 4+     262.5 2 
  134 20 
E2
   186.211
2+
   600.66 5 AB 1-     414.60 5 
  600.66 5 
   60
  100

E1
   186.211
     0.0
2+
0+
   635.47 15 AB 3-     448.6 5 
 

   186.211
2+
   768.5 4  B (6+)     319.6 2 
  118 26 
E2
   448.37
4+
   797.8 6  B (5-)     163.0 5 ?
  348.9 5 ?
 
 


   635.47
   448.37
3-
4+
  1049.2 6  B (7-)     251.4 5 ?
  280.6 5 
 
   25 7 

E1
   797.8
   768.5
(5-)
(6+)
  1128.1 4  B (8+)     359.6 2 
   75 14 
E2
   768.5
(6+)
  1356.9 6  B (9-)     228.8 5 
  307.7 5 
   23 13 
   31 13 
E1
E2
  1128.1
  1049.2
(8+)
(7-)
  1513.0 5  B (10+)     384.9 2 
   40 11 
E2
  1128.1
(8+)
  1708.2 6  B (11-)     195.4 5 
  351.2 5 
   22 14 
   46 14 
E1
E2
  1513.0
  1356.9
(10+)
(9-)
  1913.4 6 ? B (12+)     400.4 5 ?
 

  1513.0
(10+)
  2089.1 8  B (13-)     175.6 5 ?
  380.9 5 
 
   15 8 

E2
  1913.4
  1708.2
(12+)
(11-)
  2317.2 8 ? B (14+)     403.8 5 ?
 

  1913.4
(12+)
  2485.3 8 ? B (15-)     396.3 5 ?
 

  2089.1
(13-)
  2727.7 9 ? B (16+)     410.5 5 ?
 

  2317.2
(14+)
  2881.9 10 ? B (17-)     396.6 5 ?
 

  2485.3
(15-)
  3285.9 11 ? B (19-)     404.0 5 ?
 

  2881.9
(17-)
  3696.1 12 ? B (21-)     410.2 5 ?
 

  3285.9
(19-)

Jπ(level): All levels above 635 based on band assignments in (HI,xnγ)

E(γ): All γ properties are from 226Ra α decay.

I(γ): Relative photon intensity deexciting the level.

M(γ): From GAMMASPHERE data (1999Co02)

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - Kπ=0+ GS band.
     0.0 0+ 3.8235 d 3 
% α = 100
     
   186.211 13  2+ 0.32 ns 2    186.4 2 
  100 15 
E2
     0.0
0+
   448.37 12  4+     262.5 2 
  134 20 
E2
   186.211
2+
   768.5 4  (6+)     319.6 2 
  118 26 
E2
   448.37
4+
  1128.1 4  (8+)     359.6 2 
   75 14 
E2
   768.5
(6+)
  1513.0 5  (10+)     384.9 2 
   40 11 
E2
  1128.1
(8+)
  1913.4 6  (12+)     400.4 5 ?
 

  1513.0
(10+)
  2317.2 8  (14+)     403.8 5 ?
 

  1913.4
(12+)
  2727.7 9  (16+)     410.5 5 ?
 

  2317.2
(14+)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - Kπ=0- octupole VIBRATIONAL band.
   600.66 5  1-        
   635.47 15  3-     448.6 5 
 

   186.211
2+
   797.8 6  (5-)     163.0 5 ?
  348.9 5 ?
 
 


   635.47
   448.37
3-
4+
  1049.2 6  (7-)     251.4 5 ?
  280.6 5 
 
   25 7 

E1
   797.8
   768.5
(5-)
(6+)
  1356.9 6  (9-)     228.8 5 
  307.7 5 
   23 13 
   31 13 
E1
E2
  1128.1
  1049.2
(8+)
(7-)
  1708.2 6  (11-)     195.4 5 
  351.2 5 
   22 14 
   46 14 
E1
E2
  1513.0
  1356.9
(10+)
(9-)
  2089.1 8  (13-)     175.6 5 ?
  380.9 5 
 
   15 8 

E2
  1913.4
  1708.2
(12+)
(11-)
  2485.3 8  (15-)     396.3 5 ?
 

  2089.1
(13-)
  2881.9 10  (17-)     396.6 5 ?
 

  2485.3
(15-)
  3285.9 11  (19-)     404.0 5 ?
 

  2881.9
(17-)
  3696.1 12  (21-)     410.2 5 ?
 

  3285.9
(19-)

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
   186.211 2+ 0.32 ns 2    186.4 2 E20.692B(E2)(W.u.)=58 4, α=0.692

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 3.8235 d 3 
% α = 100
See 1986De32, 1986Ir01, 1986Pi11 for the calculations of partial half-life for 14C decay.
E(level): See 1986De32, 1986Ir01, 1986Pi11 for the calculations of partial half-life for 14C decay. Kπ=0+ GS band.
   186.2112+ 0.32 ns 2  μ=+0.92 14 (2005St24,1970Or02)
See 1970Or02 for Gyromagnetic ratio g=0.45 7 by αγ(θ,H).
E(level): See 1970Or02 for Gyromagnetic ratio g=0.45 7 by αγ(θ,H). Kπ=0+ GS band.
   448.374+   (α)(262γ)(θ) data of 1989Po03 rule out J of 0, 1, 2 and 3. Jπ|=4- by requiring parity conservation for the α transition from the 0+ parent.
E(level): (α)(262γ)(θ) data of 1989Po03 rule out J of 0, 1, 2 and 3. Jπ|=4- by requiring parity conservation for the α transition from the 0+ parent. Kπ=0+ GS band.
   600.661-   E(level): Kπ=0- octupole VIBRATIONAL band.
   635.473-   (α)(449γ)(θ) data of 1989Po03 rules out 0, 1, 2 and 4; Jπ|=1+, 2- by requiring parity conservation in α decay from its 0+ parent.
E(level): (α)(449γ)(θ) data of 1989Po03 rules out 0, 1, 2 and 4; Jπ|=1+, 2- by requiring parity conservation in α decay from its 0+ parent. Kπ=0- octupole VIBRATIONAL band.
   768.5(6+)   E(level): Kπ=0+ GS band.
   797.8(5-)   E(level): Kπ=0- octupole VIBRATIONAL band.
  1049.2(7-)   E(level): Kπ=0- octupole VIBRATIONAL band.
  1128.1(8+)   E(level): Kπ=0+ GS band.
  1356.9(9-)   E(level): Kπ=0- octupole VIBRATIONAL band.
  1513.0(10+)   E(level): Kπ=0+ GS band.
  1708.2(11-)   E(level): Kπ=0- octupole VIBRATIONAL band.
  1913.4(12+)   E(level): Kπ=0+ GS band.
  2089.1(13-)   E(level): Kπ=0- octupole VIBRATIONAL band.
  2317.2(14+)   E(level): Kπ=0+ GS band.
  2485.3(15-)   E(level): Kπ=0- octupole VIBRATIONAL band.
  2727.7(16+)   E(level): Kπ=0+ GS band.
  2881.9(17-)   E(level): Kπ=0- octupole VIBRATIONAL band.
  3285.9(19-)   E(level): Kπ=0- octupole VIBRATIONAL band.
  3696.1(21-)   E(level): Kπ=0- octupole VIBRATIONAL band.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   600.66   600.66M(γ): assigned by evaluators, only E1 decay is possible.

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