ADOPTED LEVELS, GAMMAS for 252No

Authors: A.M. Mattera, S. Zhu, A.B. Hayes, E.A. Mccutchan |  Citation: Nucl. Data Sheets 172, 543 (2021) |  Cutoff date: 1-Jan-2021 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-5866 keV SYS(n)= 8049 keV SYS(p)= 3384 keV 21Q(α)= 8549 keV 5
Reference: 2017WA10

References:
  A  206Pb(48Ca,2nγ)  B  256Rf α decay
  C  252No IT decay (109 MS) 

General Comments:

2001Ma74: α 26 d 7, Eα=5.53 MeV 4 transition has been observed in Lr-No fraction in 24-GeV p on W at CERN. Assignment to 252No or 254Lr isomer is suggested. Calculations for various scenarios for such transitions are given.

Q-value: ΔQ(β-)=238, ΔS(n)=115 (2017Wa10)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0ABC 0+ 2.46 s 2 
% α = 65.3 5
% ε = 1.7 9
% SF = 33.0 8
     
    46.4 10 A C (2+)      46.4 10 S
 

     0
0+
   153.6 13 A C (4+)     107
 

    46.4
(2+)
   320.6 13 A C (6+)     166.9 3 
  100
(E2)
   153.6
(4+)
   544.4 13 A C (8+)     223.8 2 
  100
(E2)
   320.6
(6+)
   821.6 13 A C (10+)     277.2 2 
  100

   544.4
(8+)
   929.1 13 A C (2-)     883
 

    46.4
(2+)
   966.4 13 A C (3-)     920
 

    46.4
(2+)
  1014.9 13 A C (4-)      86
  861
 
 


   929.1
   153.6
(2-)
(4+)
  1073.4 13 A C (5-)     107
  920
 
 


   966.4
   153.6
(3-)
(4+)
  1147.9 13 A C (6-)      75
  133
  827
 
 
 



  1073.4
  1014.9
   320.6
(5-)
(4-)
(6+)
  1150.0 13 A C (12+)     328.4 3 
  100

   821.6
(10+)
  1229.8 14 A C (7-)     156
  685
  910
 
 
 


(E1)
  1073.4
   544.4
   320.6
(5-)
(8+)
(6+)
  1254.6 15 A C (8-) 109 ms 3 
% IT ≈ 100
  107
  710
 
 


  1147.9
   544.4
(6-)
(8+)
  1360.6 17 A   (9-)     106
 

  1254.6
(8-)
  1478.6 17 A   (10-)     118
  224
 
 


  1360.6
  1254.6
(9-)
(8-)
  1525.5 14 A   (14+)     375.5 4 
  100

  1150.0
(12+)
  1607.6 17 A   (11-)     129
  247
 
 


  1478.6
  1360.6
(10-)
(9-)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  1747.6 18 A   (12-)     140
  269
 
 


  1607.6
  1478.6
(11-)
(10-)
  1898.6 18 A   (13-)     151
  291
 
 


  1747.6
  1607.6
(12-)
(11-)
  1942.2 14 A   (16+)     416.7 4 
  100

  1525.5
(14+)
  2060.6 19 A   (14-)     162
  313
 
 


  1898.6
  1747.6
(13-)
(12-)
  2232.6 19 A   (15-)     172
  334
 
 


  2060.6
  1898.6
(14-)
(13-)
  2395.4 16 A   (18+)     453.2 7 
  100

  1942.2
(16+)
  2414.6 20 A   (16-)     182
  354
 
 


  2232.6
  2060.6
(15-)
(14-)
  2607.6 20 A   (17-)     193
  375
 
 


  2414.6
  2232.6
(16-)
(15-)
  2816.6 21 A   (18-)     209
  402
 
 


  2607.6
  2414.6
(17-)
(16-)
  2879.1 18 A   (20+)     483.7 7 
  100

  2395.4
(18+)
  3027.6 21 A   (19-)     211
  420
 
 


  2816.6
  2607.6
(18-)
(17-)
  3252.6 22 A   (20-)     225
  436
 
 


  3027.6
  2816.6
(19-)
(18-)
  3480.6 22 A   (21-)     228
  453
 
 


  3252.6
  3027.6
(20-)
(19-)
  3719.6 23 A   (22-)     239
  467
 
 


  3480.6
  3252.6
(21-)
(20-)

E(level): From a least-square fit to Eγ data, assuming 1 keV uncertainty where none was available.

E(level): From 206Pb(48Ca,2nγ).

Jπ(level): from band assignment.

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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 band.
     0 0+ 2.46 s 2 
% α = 65.3 5
% ε = 1.7 9
% SF = 33.0 8
     
    46.4 10  (2+)      46.4 10 S
 

     0
0+
   153.6 13  (4+)     107
 

    46.4
(2+)
   320.6 13  (6+)     166.9 3 
  100
(E2)
   153.6
(4+)
   544.4 13  (8+)     223.8 2 
  100
(E2)
   320.6
(6+)
   821.6 13  (10+)     277.2 2 
  100

   544.4
(8+)
  1150.0 13  (12+)     328.4 3 
  100

   821.6
(10+)
  1525.5 14  (14+)     375.5 4 
  100

  1150.0
(12+)
  1942.2 14  (16+)     416.7 4 
  100

  1525.5
(14+)
  2395.4 16  (18+)     453.2 7 
  100

  1942.2
(16+)
  2879.1 18  (20+)     483.7 7 
  100

  2395.4
(18+)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - Possible octupole band
   929.1 13  (2-)        
   966.4 13  (3-)     920
 

    46.4
(2+)
  1014.9 13  (4-)      86
  861
 
 


   929.1
   153.6
(2-)
(4+)
  1073.4 13  (5-)     107
  920
 
 


   966.4
   153.6
(3-)
(4+)
  1147.9 13  (6-)      75
  133
  827
 
 
 



  1073.4
  1014.9
   320.6
(5-)
(4-)
(6+)
  1229.8 14  (7-)     156
  685
  910
 
 
 


(E1)
  1073.4
   544.4
   320.6
(5-)
(8+)
(6+)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - ν7/2[624]~#ν9/2[734],α=0 (2012Su22).
  1254.6 15  (8-) 109 ms 3 
% IT ≈ 100
     
  1478.6 17  (10-)     118
  224
 
 


  1360.6
  1254.6
(9-)
(8-)
  1747.6 18  (12-)     140
  269
 
 


  1607.6
  1478.6
(11-)
(10-)
  2060.6 19  (14-)     162
  313
 
 


  1898.6
  1747.6
(13-)
(12-)
  2414.6 20  (16-)     182
  354
 
 


  2232.6
  2060.6
(15-)
(14-)
  2816.6 21  (18-)     209
  402
 
 


  2607.6
  2414.6
(17-)
(16-)
  3252.6 22  (20-)     225
  436
 
 


  3027.6
  2816.6
(19-)
(18-)
  3719.6 23  (22-)     239
  467
 
 


  3480.6
  3252.6
(21-)
(20-)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 4 - ν7/2[624]~#ν9/2[734],α=1 (2012Su22)
  1360.6 17  (9-)        
  1607.6 17  (11-)     129
  247
 
 


  1478.6
  1360.6
(10-)
(9-)
  1898.6 18  (13-)     151
  291
 
 


  1747.6
  1607.6
(12-)
(11-)
  2232.6 19  (15-)     172
  334
 
 


  2060.6
  1898.6
(14-)
(13-)
  2607.6 20  (17-)     193
  375
 
 


  2414.6
  2232.6
(16-)
(15-)
  3027.6 21  (19-)     211
  420
 
 


  2816.6
  2607.6
(18-)
(17-)
  3480.6 22  (21-)     228
  453
 
 


  3252.6
  3027.6
(20-)
(19-)

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
   320.6 (6+)     166.9 3 (E2)3.09α=3.09, α(K)=0.125 4, α(L)=2.30 7, α(M)=0.666 20, α(N+)=0.220 7
   544.4 (8+)     223.8 2 (E2)0.97α=0.97, α(K)=0.124 4, α(L)=0.660 20, α(M)=0.190 6, α(N+)=0.0626 19

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     00+ 2.46 s 2 
% α = 65.3 5
% ε = 1.7 9
% SF = 33.0 8
δ<r2>254,252=-0.105 fm2 7 (stat) 7 (syst) (2018Ra11).
E(level): GS band.
    46.4(2+)   E(level): GS band.
   153.6(4+)   E(level): GS band.
   320.6(6+)   E(level): GS band.
   544.4(8+)   E(level): GS band.
   821.6(10+)   E(level): GS band.
   929.1(2-)   E(level): Possible octupole band.
   966.4(3-)   E(level): Possible octupole band.
  1014.9(4-)   E(level): Possible octupole band.
  1073.4(5-)   E(level): Possible octupole band.
  1147.9(6-)   E(level): Possible octupole band.
  1150.0(12+)   E(level): GS band.
  1229.8(7-)   E(level): Possible octupole band.
  1254.6(8-) 109 ms 3 
% IT ≈ 100
E(level): ν7/2[624]~#ν9/2[734],α=0 (2012Su22).
  1360.6(9-)   E(level): ν7/2[624]~#ν9/2[734],α=1 (2012Su22).
  1478.6(10-)   E(level): ν7/2[624]~#ν9/2[734],α=0 (2012Su22).
  1525.5(14+)   E(level): GS band.
  1607.6(11-)   E(level): ν7/2[624]~#ν9/2[734],α=1 (2012Su22).
  1747.6(12-)   E(level): ν7/2[624]~#ν9/2[734],α=0 (2012Su22).
  1898.6(13-)   E(level): ν7/2[624]~#ν9/2[734],α=1 (2012Su22).
  1942.2(16+)   E(level): GS band.
  2060.6(14-)   E(level): ν7/2[624]~#ν9/2[734],α=0 (2012Su22).
  2232.6(15-)   E(level): ν7/2[624]~#ν9/2[734],α=1 (2012Su22).
  2395.4(18+)   E(level): GS band.
  2414.6(16-)   E(level): ν7/2[624]~#ν9/2[734],α=0 (2012Su22).
E(level)Jπ(level)T1/2(level)Comments
  2607.6(17-)   E(level): ν7/2[624]~#ν9/2[734],α=1 (2012Su22).
  2816.6(18-)   E(level): ν7/2[624]~#ν9/2[734],α=0 (2012Su22).
  2879.1(20+)   E(level): GS band.
  3027.6(19-)   E(level): ν7/2[624]~#ν9/2[734],α=1 (2012Su22).
  3252.6(20-)   E(level): ν7/2[624]~#ν9/2[734],α=0 (2012Su22).
  3480.6(21-)   E(level): ν7/2[624]~#ν9/2[734],α=1 (2012Su22).
  3719.6(22-)   E(level): ν7/2[624]~#ν9/2[734],α=0 (2012Su22).

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Additional Gamma Comments:

E(level)E(gamma)Comments
    46.4    46.4E(γ): estimated from extrapolation of spin vs. |w expansion in 2002He01.
   320.6   166.9M(γ): From comparison of expected and observed transition intensities in the band.
   544.4   223.8M(γ): From comparison of expected and observed transition intensities in the band.
  1229.8   910M(γ): from intensity balance in IT decay (109 ms)
  1254.6   107E(γ): from 252No IT decay. Weak transitions.
  1360.6   106E(γ): Weak transitions.
  1478.6   118E(γ): Weak transitions.
  1607.6   129E(γ): Weak transitions.
  1747.6   140E(γ): Weak transitions.
  1898.6   151E(γ): Weak transitions.
  3480.6   228E(γ): Weak transitions.
  3719.6   239E(γ): Weak transitions.

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