ADOPTED LEVELS, GAMMAS for 253Es
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-)=-334 keV 3 | S(n)= 6352 keV 50 | S(p)= 4310 keV 5 | Q(α)= 6739.16 keV 5 | ||
| Reference: 2012WA38 |
| References: | |||
| A | 253Cf β- decay | B | 253Fm ε decay |
| C | 257Md α decay | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | Final Levels | |
| 0 | ABC | 7/2+ | 20.47 d 3 % α = 100 % SF = 8.7×10-6 3 | ||||
| 46.3 3 | A C | (9/2+) | 46.4 1 | 100 | 0 | 7/2+ | |
| 80 8 | C | (11/2+) | |||||
| 106 4 | C | ||||||
| 139 3 | C | (5/2-) | |||||
| 181.3 5 | C | (7/2-) | 181.3 5 | 100 | 0 | 7/2+ | |
| 371.4 1 | C | (7/2-) | 325.1 2 371.4 1 | 21 3 100 5 | 46.3 0 | (9/2+) 7/2+ | |
| 435 2 | C | (9/2-) | 388.5 15 | 100 | 46.3 | (9/2+) | |
E(level): From 257Md α decay, unless otherwise noted
Jπ(level): From band assignment, unless specifically stated.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | Final Levels | ||
| Band 1 - Band 7/2+[633]. | |||||||
| 0 | 7/2+ | 20.47 d 3 % α = 100 % SF = 8.7×10-6 3 | |||||
| 46.3 3 | (9/2+) | 46.4 1 | 100 | 0 | 7/2+ | ||
| 80 8 | (11/2+) | ||||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | Final Levels | ||
| Band 2 - Band 3/2-[521]. | |||||||
| 139 3 | (5/2-) | ||||||
| 181.3 5 | (7/2-) | 181.3 5 | 100 | 0 | 7/2+ | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | Final Levels | ||
| Band 3 - Band 7/2-[514]. | |||||||
| 371.4 1 | (7/2-) | ||||||
| 435 2 | (9/2-) | 388.5 15 | 100 | 46.3 | (9/2+) | ||
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 7/2+ | 20.47 d 3 % α = 100 % SF = 8.7×10-6 3 | Q=6.7 8 (2011StZZ,1975Go05), μ=4.10 7 (2011StZZ,1975Go05) 2000Ho27 have recommended SF half-life as 6.3×105 y 2 from weighted average of values given by 1954Fi14, 1956Jo09 and 1965Me02. Other SF half-life calculations: 2005Re16, 2004Ro01. E(level): Band 7/2+[633]. |
| 46.3 | (9/2+) | E(level): Band 7/2+[633]. | |
| 80 | (11/2+) | E(level): Band 7/2+[633]. | |
| 139 | (5/2-) | E(level): Band 3/2-[521]. | |
| 181.3 | (7/2-) | E(level): Band 3/2-[521]. | |
| 371.4 | (7/2-) | E(level): Band 7/2-[514]. | |
| 435 | (9/2-) | E(level): Band 7/2-[514]. |
| E(level) | E(gamma) | Comments |
| 46.3 | 46.4 | E(γ): from 253Cf β- decay |
Calculations, compilations:
α decay: 1996St28, 1993Bu09, 1992Bu03
g.s. properties: 1997Mo25, 1995Mo29, 2004Pa40
Pion decay: 1988Io05
Single-particle Nilsson levels: 1994Cw02, 2004Pa40
1994Cw02 calculated the following predominant configurations: g.s., 7/2[633]; 0.29 MeV, 3/2[521]; 0.32 MeV, 1/2[521]; 0.58 MeV, 7/2[514]; 0.62 MeV, 1/2[660]; 0.71 MeV, 5/2[642].
2004Pa40 have calculated following predominant configurations: 0.16 MeV, 1/2[521]; 0.22 MeV, 3/2[521]; 0.48 MeV, 1/2[400]; 0.50 MeV, 7/2[514]; 0.51 MeV, 5/2[642].
2008Gu05 (same as 2007Se08) measured T1/2 vs temp with isotope implanted in metallic iron and found no temperature dependance of its half-life.
Gammas: All γ data are from 257Md α decay, unless otherwise noted