ADOPTED LEVELS for 199Rn
Author: Balraj Singh | Citation: Nucl. Data Sheets 108, 79 (2007) | Cutoff date: 15-Oct-2006
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-8.26×103 keV 8 | S(n)= 8.34×103 keV 7 | S(p)= 2.07×103 keV SY | Q(α)= 7.14×103 keV 5 | ||
| Reference: 2012WA38 |
| References: | |||
| A | 203Ra α decay (31 MS) | B | 203Ra α decay (24 MS) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
| 0 | A | (3/2-) | 0.59 s 3 % ε = 6 % α = 94 |
| 180 70 | B | (13/2+) | 0.31 s 2 % ε = 3 % α = 97 |
Jπ(level): From analogy with other n=113 nuclei, shell model.
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | (3/2-) | 0.59 s 3 % ε = 6 % α = 94 | Branching from ε syst of 1973Ta30. E(level): Branching from ε syst of 1973Ta30. |
| 180 | (13/2+) | 0.31 s 2 % ε = 3 % α = 97 | Branching from ε syst of 1973Ta30. |
199Rn isotope identified (1980Di07,1981En02) in 169Tm(35Cl,5n) reaction at E(35Cl)=15-185 MeV. Others: 1982Hi14, 1984Ca32, 1986Bo35.
In 193Ir(19F,13N) reaction at E=9.4 MeV/nucleon (1969Ru08), analysis of fissioning products possibly suggests fission isomer of 199Rn with T1/2|<2 ns (1969Ru08). This isomer remains unconfirmed
The low-spin and high-spin 199Rn α activities are the parents (respectively) of the low-spin (6609α) and high-spin (6699α) 195Po α activities (1982Hi14).
Mass mapping from analysis of α decay data: 2002No01
Q-value: Note: Current evaluation has used the following Q record $ -8280 80 8360 60 2130 80 7130 50 2003Au03
Q-value: Q(εp)=6670 70 (2003Au03)