ADOPTED LEVELS, GAMMAS for 255Fm
Authors: E. Browne, J. K. Tuli | Citation: Nucl. Data Sheets 114, 1041 (2013) | Cutoff date: 1-Nov-2011
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-1043 keV 8 | S(n)= 5175 keV 5 | S(p)= 5481 keV 6 | Q(α)= 7239.7 keV 18 | ||
Reference: 2012WA38 |
References: | |||
A | 255Es β- decay | B | 255Md ε decay |
C | 259No α decay |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | ABC | 7/2+ | 20.07 h 7 % α = 100 % SF = 2.4×10-5 10 | |||||
61.6 3 | ABC | (9/2+) | 61.7 | 100 | [M1] | 0.0 | 7/2+ | |
231.1 2 | BC | 9/2+ | 169.5 2 231.1 2 | 11 1 100 11 | M1+E2 M1+E2 | 61.6 0.0 | (9/2+) 7/2+ |
E(level): From 255Md ε decay, unless otherwise noted.
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - 7/2[613] | |||||||
0.0 | 7/2+ | 20.07 h 7 % α = 100 % SF = 2.4×10-5 10 | |||||
61.6 3 | (9/2+) | 61.7 | 100 | [M1] | 0.0 | 7/2+ |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
61.6 | (9/2+) | 61.7 | [M1] | 42.9 | α=42.9 9 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 7/2+ | 20.07 h 7 % α = 100 % SF = 2.4×10-5 10 | μ=-3.46, Q=10.6 E(level): 7/2[613]. |
61.6 | (9/2+) | E(level): 7/2[613]. |
Calculations, compilations:
Cluster decay (20O): 1994Ci12
Delayed neutron emission: 1989Br25
Favored α decays: 1993Bu09, 1992Bu03
Ground state configuration: 1995Ci09, 1995Du05
Single-particle Nilsson levels: 2005Pa73, 1994Cw02
Q(α), half-lives, and decay branching ratios: 2010Ni02, 2010Si27, 2009Sa25, 2008Do12
Spontaneous fission half-lives: 2004Ro01, 2000Ho27
1994Cw02 have calculated the following single-particle level sequence: g.s. 1/2[620], 0.01 MeV, 3/2[622]; 0.09 MeV, 7/2[613]; 0.14 MeV, 11/2[725]; 0.49 MeV, 9/2[615].