ADOPTED LEVELS for 228Fr
Author: Khalifeh Abusaleem | Citation: Nucl. Data Sheets 116, 163 (2014) | Cutoff date: 31-Dec-2012
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=4426 keV 14 | S(n)= 4388 keV 19 | S(p)= 6806 keV 20 | Q(α)= 3233 keV 26 | ||
| Reference: 2012WA38 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0.0 | 2- | 38 s 1 % β- ≤ 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 2- | 38 s 1 % β- ≤ 100 | Q=+2.38 5 (1989Ra17,1985Co24), μ=-0.76 2 (1989Ra17,1985Co24) Isotope shift: Δ<r2>=+1.67522 20 relative to 212Fr (1987Co19) (correction of earlier value quoted in 1985Co24). Jπ(level): For a discussion of deformation and configuration, see 1988Sh01 and 1986Ek02. 1988Sh01 deduce that 2- is a possible assignment for an octupole deformed 228Fr; 1986Ek02 deduce from nuclear moments that the main configuration=((π 1/2[400])(ν 5/2[633])). |
Assignment: Th(660 MeV p) ms (1975Ra03); 238U(660 MeV p) ms (1982Ru04)
Searched for β- delayed fission, not found (probability<2×10-7) (1990Me13)
Systematics: Level structure in odd-odd actinides (1994So16)
Mass measurement: 2010Li02
Production cross section: 2010Al24, 2009Pa49, 2004Pe17.
Isomeric state at around 500 keV and half-life of around 1 minute (2006Li59)
Calculation of isotopic shift: 2005Dz02
No level scheme has been proposed. For γ’s observed in 65 s 228Rn β- decay, see 228Rn β- decay data set.