ADOPTED LEVELS, GAMMAS for 248Fm

Author: M. J. Martin |  Citation: Nucl. Data Sheets 122, 377 (2014) |  Cutoff date: 1-Sep-2014 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-5250 keV SYS(n)= 7850 keV SYS(p)= 3969 keV 21Q(α)= 7994 keV 9
Reference: 2012WA38

References:
  A  252No α decay  B  202Hg(48Ca,2nγ)







E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		M(γ)Final Levels
      0AB 0+ 34.5 s 12 
% ε = 5 5
% α = 95 5
% SF = 0.10 5
    
     46 1 AB 2+      46 1 S
[E2]
      0
0+
    152 B 4+     106 1 S
[E2]
     46
2+
    317.2 3  B 6+     165.2 3 
[E2]
    152
4+
    538.6 4  B 8+     221.4 4 
[E2]
    317.2
6+
    813.3 5  B 10+     274.7 3 
[E2]
    538.6
8+
  >1074?   10.1 ms 6      
   1137.3 6  B 12+     324.0 3 
[E2]
    813.3
10+
   1507.7 7  B 14+     370.4 3 
[E2]
   1137.3
12+
   1921 2  B 16+     413 1 
[E2]
   1507.7
14+
   2372 2  B 18+     451 1 
[E2]
   1921
16+

E(level): From the Eγ data relative to E=152 for the 4+ level

Jπ(level): Member of the g.s. rotational band

E(γ): For unplaced γ’s see 202Hg(48Ca,2nγ)

E(γ): From 202Hg(48Ca,2nγ). The 46 and 106 transitions are not observed in that reaction. The energies are from a fit to a rotational band formula. See the source dataset for details and for unplaced γ’s. Eγ(2+ to 0+)=44 10 in α decay

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)M(γ)Final Levels
Band 1 - Kπ=0+ GS band.
      0 0+ 34.5 s 12 
% ε = 5 5
% α = 95 5
% SF = 0.10 5
    
     46 1  2+      46 1 S
[E2]
      0
0+
    152 4+     106 1 S
[E2]
     46
2+
    317.2 3  6+     165.2 3 
[E2]
    152
4+
    538.6 4  8+     221.4 4 
[E2]
    317.2
6+
    813.3 5  10+     274.7 3 
[E2]
    538.6
8+
   1137.3 6  12+       
   1507.7 7  14+     370.4 3 
[E2]
   1137.3
12+
   1921 2  16+     413 1 
[E2]
   1507.7
14+
   2372 2  18+     451 1 
[E2]
   1921
16+

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
     46 2+      46 1 [E2]1.05×103α=1.05×103 12
    152 4+     106 1 [E2]20.2α=20.2 10
    317.2 6+     165.2 3 [E2]2.88α=2.88 5
    538.6 8+     221.4 4 [E2]0.905α=0.905 14
    813.3 10+     274.7 3 [E2]0.419α=0.419 6
   1137.3 12+     324.0 3 [E2]0.246α=0.246 4
   1507.7 14+     370.4 3 [E2]0.165α=0.165 3
   1921 16+     413 1 [E2]0.122α=0.122 2
   2372 18+     451 1 [E2]0.0967α=0.0967 15

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      00+ 34.5 s 12 
% ε = 5 5
% α = 95 5
% SF = 0.10 5
E(level): Kπ=0+ GS band.
     462+   E(level): Kπ=0+ GS band.
    1524+   E(level): Kπ=0+ GS band.
    317.26+   E(level): Kπ=0+ GS band.
    538.68+   E(level): Kπ=0+ GS band.
    813.310+   E(level): Kπ=0+ GS band.
   1137.312+   E(level): Kπ=0+ GS band.
   1507.714+   E(level): Kπ=0+ GS band.
   192116+   E(level): Kπ=0+ GS band.
   237218+   E(level): Kπ=0+ GS band.

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