ADOPTED LEVELS for 221Po
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 15-JUN-2013
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=2991 keV 24 | S(n)= 3561 keV 26 | S(p)= 8330 keV SY | Q(α)= 5110 keV SY | ||
| Reference: 2012WA38 |
| E(level) (keV) | T1/2(level) |
| 0 | 112 s +58-28 % β- = 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 112 s +58-28 % β- = 100 | Main decay mode possible is only β-. From theoretical T1/2(α)=10+8.4 s and T1/2=3.2 s (1997Mo25), α decay mode is expected to be negligible. Q(β-n) is negative thus this decay mode is not possible. E(level): Main decay mode possible is only β-. From theoretical T1/2(α)=10+8.4 s and T1/2=3.2 s (1997Mo25), α decay mode is expected to be negligible. Q(β-n) is negative thus this decay mode is not possible. |
2010Ch19, 2012Ch19: 221Po isotope produced and identified in 9Be(238U,X),E=670 MeV/nucleon fragmentation reaction, separated by Fragment Recoil Separator (FRS) at GSI facility. The fragments were then injected into the electron cooler experimental storage ring (ESR) for mass and half-life measurement of 221Po g.s. by time-resolved Schottky Mass spectrometry technique.
2010Al24: 221Po produced in 9Be(238U,X),E=1 GeV/nucleon, reaction products analyzed by FRS at GSI facility, measured production σ and compared with COFRA and EPAX calculations
Mass measurement: 2012Ch19, 2010Ch19
2012Zh46, 1983Sa22: theoretical calculations of binding energies and and other properties
2012Sa31: theoretical calculation of half-life for cluster decay
Q-value: Estimated uncertainty of 300 for S(p) and Q(α)
Q-value: S(2n)=9050 25, S(2p)=15080 400 (syst) (2012Wa38)