ADOPTED LEVELS, GAMMAS for 144Cs

Author: Balraj Singh |  Citation: ENSDF |  Cutoff date: 30-APR-2010 

Author: A.A. Sonzogni |  Citation: Nucl. Data Sheets 93, 599 (2001) |  Cutoff date: 1-Dec-2000 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=8.50×103 keV 3S(n)= 3.67×103 keV 4S(p)= 1.036×104 keV 3Q(α)= -2.10×103 keV 19
Reference: 2012WA38

References:
  A  248Cm SF decay  B  252Cf SF decay

General Comments:

1979Ba62: measured fission yield in 235U(n,F)

1986Au02: measured fission yield in U(p,X) and mass

1981Th06: isotope shift measurement

No information is available about population of levels in 144Cs from 144Xe β- decay and 145Xe β-n decay

Q-value: Note: Current evaluation has used the following Q record 8499 26 3670 30 10356 27-1420 syst 2009AuZZ,2003Au03

Q-value: S(p): from 2009AuZZ; in 2003Au03 S(p)=10110 200 from systematics

Q-value: ΔQ(α)=200 keV (2009AuZZ,2003Au03)

Q-value: Q(β-n)=2594 29 (2009AuZZ,2003Au03)










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0.0A  1(-) 0.994 s 6 
% β- = 100
% β-n = 3.03 13
     
    42.8 3 A  (2-)      42.8
 
(M1+E2)
     0.0
1(-)
    92.2 5 A  (4-) 1.1 µs 1     49.4
 
(E2)
    42.8
(2-)
   0+XAB J        
   0+Y?   (GE 4) < 1 s
% β- = ?
     
   107.9+X 6 AB (J+1,J+2) ≤ 8 ns   107.9
  100
(M1+E2,E2)
   0+X
J
   222.7+X 6 AB (J+2,J+4)     114.8
  100
(M1+E2,E2)
   107.9+X
(J+1,J+2)
   486.2+X 7 AB (J+4,J+6)     263.5
  100
Q
   222.7+X
(J+2,J+4)
   890.9+X 8 AB (J+6,J+8)     404.7
  100
Q
   486.2+X
(J+4,J+6)
  1365.0+X 8 AB     474.1
  100

   890.9+X
(J+6,J+8)
  1426.0+X 9 AB     535.1
  100

   890.9+X
(J+6,J+8)

Jπ(level): As proposed in 2009Rz02 and 2010LuAA from model considerations and multipolarities of selected transitions from γγ(θ) data and crude estimates of conversion coefficients

E(γ): Unweighted average of values from 248Cm SF decay and 252Cf SF decay, when available from both studies.

Back to top

Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - γ cascade
   0+X J        
   107.9+X 6  (J+1,J+2) ≤ 8 ns   107.9
  100
(M1+E2,E2)
   0+X
J
   222.7+X 6  (J+2,J+4)     114.8
  100
(M1+E2,E2)
   107.9+X
(J+1,J+2)
   486.2+X 7  (J+4,J+6)        
   890.9+X 8  (J+6,J+8)        
  1426.0+X 9      535.1
  100

   890.9+X
(J+6,J+8)

Back to top

Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
    42.8 (2-)      42.8(M1+E2)27α=27 17, α(K)=8.91 14, α(L)=14 13, α(M)=3 3, α(N)=0.6 6, α(O)=0.07 7, α(P)=0.00031 5, α(N+)=0.7 7
    92.2 (4-) 1.1 µs 1     49.4(E2)24.7B(E2)(W.u.)=1.5, α=24.7, α(K)=7.47 11, α(L)=13.57 19, α(M)=2.97 5, α(N)=0.597 9, α(O)=0.0673 10, α(P)=0.000205 3, α(N+)=0.664 10
   107.9+X (J+1,J+2) ≤ 8 ns   107.9(M1+E2,E2)1.1α=1.1 4, α(K)=0.79 17, α(L)=0.23 15, α(M)=0.05 4, α(N)=0.010 7, α(O)=0.0012 8, α(P)=2.57×10-5 13, α(N+)=0.011 7
   222.7+X (J+2,J+4)     114.8(M1+E2,E2)0.9α=0.9 3, α(K)=0.66 14, α(L)=0.18 11, α(M)=0.038 24, α(N)=0.008 5, α(O)=0.0010 6, α(P)=2.16×10-5 10, α(N+)=0.009 6

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.01(-) 0.994 s 6 
% β- = 100
% β-n = 3.03 13
μ=-0.546 3 (1981Th06,1989Ra17,2005St24), Q=+0.30 1 (1981Th06,1989Ra17,2005St24)
-n: weighted average of 3.0 3 (2003Be05), 3.17 13 (1993Ru01), 3.06 25 (1981Re12), 2.79 18 (1980Lu04), 2.95 25 (1979Ri09). Uncertainty is 0.08 from weighted average, the evaluator adopts minimum quoted experimental uncertainty of 0.13 from 1993Ru01. Normalized χ2 is 0.8. Others: 4.1 3 (1981En05), 4.3 3 (1977Re05,1977Re06) and 1.10 25 (1969Am01) are considered as discrepant values. Compilations and reviews: 3.4 4 (2002Pf04), 3.20 {21 (1993Ru01), 1989BrZI, 3.17 19 (1983ReZX), 2.9 4 (1979RuZQ), 1979KrZT, 1975Iz03.
E(level): Possible member of π3/2[422]~#ν5/2[523] multiplet (2009Rz02).
    42.8(2-)   E(level): Possible member of π3/2[422]~#ν5/2[523] multiplet (2009Rz02).
    92.2(4-) 1.1 µs 1  E(level): Possible member of π3/2[422]~#ν5/2[523] multiplet (2009Rz02).
   0+XJ   E(level): γ cascade.
   107.9+X(J+1,J+2) ≤ 8 ns E(level): γ cascade.
   222.7+X(J+2,J+4)   E(level): γ cascade.
   486.2+X(J+4,J+6)   E(level): γ cascade.
   890.9+X(J+6,J+8)   E(level): γ cascade.
  1426.0+X   E(level): γ cascade.

Back to top

Additional Gamma Comments:

E(level)E(gamma)Comments
    42.8    42.8M(γ): M1 or E2 from I(x ray)/Iγ ≈ 7 in 248Cm SF decay, when gated on ce(L)(49γ), but pure E2 assignment is excluded from intensity balance considerations, thus M1+E2 is most likely
   107.9+X   107.9M(γ): ΔJ=1, D+Q transition from (114.6γ)(107.9γ)(θ) from 248Cm SF decay, M1+E2 from intensity balance. E2 is proposed from estimate of total conversion coefficient in 252Cf SF decay
   222.7+X   114.8M(γ): ΔJ=1, D+Q transition from (114.6γ)(107.9γ)(θ) from 248Cm SF decay, M1+E2 from intensity balance. E2 is proposed from estimate of total conversion coefficient in 252Cf SF decay
   486.2+X   263.5M(γ): ΔJ=2, Q transition from (404.7γ)(263.3γ)(θ) in 248Cm SF decay
   890.9+X   404.7M(γ): ΔJ=2, Q transition from (404.7γ)(263.3γ)(θ) in 248Cm SF decay
  1365.0+X   474.1E(γ): placement is preferred here from 252Cf SF decay due to somewhat better statistics in double-gated coincidence spectra. In 248Cm SF decay, this γ is placed as 405-474-535 cascade

Back to top