ADOPTED LEVELS, GAMMAS for 249Fm

Author: Khalifeh Abusaleem |  Citation: Nucl. Data Sheets 112, 2129 (2011) |  Cutoff date: 31-Dec-2010 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-3.71×103 keV SYS(n)= 6450 keV 11S(p)= 4.07×103 keV SYQ(α)= 7709 keV 6
Reference: 2012WA38

References:
  A  253No α decay:1.62 M 

General Comments:

Calculations, compilations: 2005Pa73

Half-life: 2009Sa25

Q(α): 2008Do12

Electromagnetic properties: 2006Sh19

Favored α decays: 1993Bu09

Ground state properties: 2006Sh19, 1997Mo25, 1995Mo29

Single-particle Nilsson levels: 1994Cw02

1994Cw02 calculate the following single-particle level sequence: g.s. 7/2[624], 0.07 MeV 9/2[734], 0.12 MeV 5/2[622]

Calculations of 2006Sh19 give: D0=0.0128, Q2=983, Q3=1868 for the g.s. transition to the states of parity doublet band.

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

Q-value: -3706 syst 6358 syst 3970 syst 7808 syst 2009AuZZ

Q-value: Estimated ΔQ(β-)=224, ΔS(p)=53, ΔQ(α)=101

Q-value: Q(β-)=-3700 300, S(n)=6358 100, S(p)=3970 110, Q(α)=7810 100 (2003Au03)










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
    0A (7/2+) 2.6 m 7 
% ε = 67 9
% α = 33 9
     
   58.0 3 A 9/2+      58
  100

    0
(7/2+)
  128.6 4 A 11/2+      71
  129
 
 

E2
   58.0
    0
9/2+
(7/2+)
  146?A        
  209.5 5 A 5/2+     209.5 5 
  100
M1
    0
(7/2+)
  254 17 A        
  279.80 19 A 9/2-     151.23 31 
  221.83 19 
  279.79 19 
   18 1 
  100
   48 2 
E1
E1
E1
  128.6
   58.0
    0
11/2+
9/2+
(7/2+)
  669 3 A (7/2-)     669 3 
  100

    0
(7/2+)

Back to top

Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - 7/2[624]
    0 (7/2+) 2.6 m 7 
% ε = 67 9
% α = 33 9
     
   58.0 3  9/2+      58
  100

    0
(7/2+)
  128.6 4  11/2+      71
  129
 
 

E2
   58.0
    0
9/2+
(7/2+)

Back to top

Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
  128.6 11/2+     129E28.25α=8.25 12, α(L)=5.92 9, α(M)=1.702 24, α(N)=0.484 7, α(O)=0.1224 18, α(P)=0.0197 3, α(Q)=9.29×10-5 13, α(N+)=0.626 9
  209.5 5/2+     209.5 5 M15.60α=5.60 9, α(K)=2.2 21, α(L)=0.81 12, α(M)=0.212 17, α(N)=0.060 5, α(O)=0.0155 14, α(P)=0.0028 5, α(Q)=0.00010 9, α(N+)=0.078 6
  279.80 9/2-     151.23 31 E10.213α=0.213 4, α(K)=0.1577 25, α(L)=0.0411 7, α(M)=0.01021 17, α(N)=0.00283 5, α(O)=0.000724 12, α(P)=0.0001250 20, α(Q)=4.49×10-6 7, α(N+)=0.00368 6
9/2-     221.83 19 E10.0913α=0.0913 14, α(K)=0.0696 11, α(L)=0.01626 25, α(M)=0.00402 6, α(N)=0.001115 17, α(O)=0.000288 5, α(P)=5.12×10-5 8, α(Q)=2.05E-6 3, α(N+)=0.001456 22
9/2-     279.79 19 E10.0555α=0.0555 8, α(K)=0.0429 7, α(L)=0.00953 14, α(M)=0.00235 4, α(N)=0.000652 10, α(O)=0.0001687 25, α(P)=3.05×10-5 5, α(Q)=1.294E-6 19, α(N+)=0.000852 13

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
    0(7/2+) 2.6 m 7 
% ε = 67 9
% α = 33 9
Calculated: T1/2(ε+β+)=39 s, T1/2(α)=6×104 s (1997Mo25).
E(level): 7/2[624].
   58.09/2+   E(level): 7/2[624].
  128.611/2+   E(level): 7/2[624].
  146   May consist of an unresolved doublet.
  669(7/2-)   Configuration=7/2[743].

Back to top

Additional Gamma Comments:

E(level)E(gamma)Comments

Back to top