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 3 | S(n)= 3.67×103 keV 4 | S(p)= 1.036×104 keV 3 | Q(α)= -2.10×103 keV 19 | ||
Reference: 2012WA38 |
References: | |||
A | 248Cm SF decay | B | 252Cf SF decay |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | A | 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+X | AB | 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.
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) |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
42.8 | (2-) | 42.8 | (M1+E2) | 27 | α=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) | 24.7 | B(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) | 1.1 | α=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) | 0.9 | α=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 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 1(-) | 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) %β-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+X | J | 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. |
E(level) | E(gamma) | Comments |
42.8 | 42.8 | M(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 | 107.9 | M(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 | 114.8 | M(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 | 263.5 | M(γ): ΔJ=2, Q transition from (404.7γ)(263.3γ)(θ) in 248Cm SF decay |
890.9+X | 404.7 | M(γ): ΔJ=2, Q transition from (404.7γ)(263.3γ)(θ) in 248Cm SF decay |
1365.0+X | 474.1 | E(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 |
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)