ADOPTED LEVELS, GAMMAS for 253Cf
Authors: E. Browne, J. K. Tuli | Citation: Nucl. Data Sheets 114, 1041 (2013) | Cutoff date: 1-Mar-2012
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=287 keV 6 | S(n)= 4804 keV 4 | S(p)= 6522 keV SY | Q(α)= 6126 keV 4 | ||
Reference: 2012WA38 |
References: | |||
A | 257Fm α decay |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | A | (7/2+) | 17.81 d 8 % β- = 99.69 4 % α = 0.31 4 | |||||
61.61 8 | A | (9/2+) | 61.6 1 | 100 | M1+E2 | 0.0 | (7/2+) | |
136.62 9 | A | (11/2+) | 75.0 1 136.7 2 | 100 9 30 10 | (M1) | 61.61 0.0 | (9/2+) (7/2+) | |
241.01 8 | A | (9/2+) | 104.4 1 179.4 1 241.0 1 | 5.6 5 79 6 100 6 | (M1) M1+E2 M1+E2 | 136.62 61.61 0.0 | (11/2+) (9/2+) (7/2+) | |
321.21 22 | A | (11/2+) | 80.2 2 | 100 | (M1+E2) | 241.01 | (9/2+) | |
417 5 | A | (13/2+) | 96 5 S | 100 | [M1,E2] | 321.21 | (11/2+) |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - Band 7/2+[613]. | |||||||
0.0 | (7/2+) | 17.81 d 8 % β- = 99.69 4 % α = 0.31 4 | |||||
61.61 8 | (9/2+) | 61.6 1 | 100 | M1+E2 | 0.0 | (7/2+) | |
136.62 9 | (11/2+) | 75.0 1 136.7 2 | 100 9 30 10 | (M1) | 61.61 0.0 | (9/2+) (7/2+) | |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 2 - Band 9/2+[615]. | |||||||
241.01 8 | (9/2+) | ||||||
321.21 22 | (11/2+) | 80.2 2 | 100 | (M1+E2) | 241.01 | (9/2+) | |
417 5 | (13/2+) | 96 5 S | 100 | [M1,E2] | 321.21 | (11/2+) |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
61.61 | (9/2+) | 61.6 1 | M1+E2 | 0.27 2 | 47.4 | α=47.4 19, α(L)=35.1 14, α(M)=9.1 4, α(N)=2.52 12, α(O)=0.64 3, α(P)=0.117 5, α(Q)=0.00503 9, α(N+)=3.29 15 | |
136.62 | (11/2+) | 75.0 1 | (M1) | 19.7 | α=19.7, α(L)=14.72 22, α(M)=3.62 6, α(N)=1.004 15, α(O)=0.261 4, α(P)=0.0504 8, α(Q)=0.00298 5, α(N+)=1.318 20 | ||
241.01 | (9/2+) | 104.4 1 | (M1) | 7.52 | α=7.52, α(L)=5.63 8, α(M)=1.386 20, α(N)=0.384 6, α(O)=0.0997 15, α(P)=0.0193 3, α(Q)=0.001136 17, α(N+)=0.504 8 | ||
(9/2+) | 179.4 1 | M1+E2 | 0.58 13 | 5.8 | α=5.8 5, α(K)=4.2 5, α(L)=1.182 17, α(M)=0.301 6, α(N)=0.0839 15, α(O)=0.0215 4, α(P)=0.00398 7, α(Q)=0.000185 18, α(N+)=0.1095 19 | ||
(9/2+) | 241.0 1 | M1+E2 | 1.06 13 | 1.78 | α=1.78 17, α(K)=1.22 16, α(L)=0.419 14, α(M)=0.109 3, α(N)=0.0304 8, α(O)=0.00775 21, α(P)=0.00140 5, α(Q)=5.4×10-5 7, α(N+)=0.0396 10 | ||
321.21 | (11/2+) | 80.2 2 | (M1+E2) | 39 | α=39 24, α(L)=29 17, α(M)=8 5, α(N)=2.2 14, α(O)=0.6 4, α(P)=0.09 5, α(Q)=0.0014 10, α(N+)=2.9 18 | ||
417 | (13/2+) | 96 5 | [M1,E2] | 18 | α=18 10, α(L)=13 7, α(M)=3.6 21, α(N)=1.0 6, α(O)=0.26 15, α(P)=0.043 22, α(Q)=0.0008 7, α(N+)=1.3 8 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | (7/2+) | 17.81 d 8 % β- = 99.69 4 % α = 0.31 4 | E(level): Band 7/2+[613]. |
61.61 | (9/2+) | E(level): Band 7/2+[613]. | |
136.62 | (11/2+) | E(level): Band 7/2+[613]. | |
241.01 | (9/2+) | E(level): Band 9/2+[615]. | |
321.21 | (11/2+) | E(level): Band 9/2+[615]. | |
417 | (13/2+) | E(level): Band 9/2+[615]. |
Calculations, compilations:
Favored α decay: 2011Zh36, 1993Bu09, 1992Bu03
g.s. properties: 1997Mo25, 1995Mo29, 2005Pa73
Single-particle Nilsson levels: 1994Cw02, 2005Pa73
1994Cw02 have calculated the following predominant configurations: g.s., 1/2[620]; 20 keV, 3/2[622]; 50 keV, 7/2[613]; 170 keV, 11/2[725]; 430 keV, 9/2[615].
2005Pa73 have calculated the following predominant configurations: g.s., 1/2[620]; 10 keV, 3/2[622]; 100 keV, 11/2[725]; 100 keV, 7/2[613]; 440 keV, 9/2[615].
Gammas: All γ data are from 257Fm α decay
Q-value: Estimated ΔS(p)=200 (2012Wa38)