ADOPTED LEVELS, GAMMAS for 215Th
Author: B. Singh | Citation: Nucl. Data Sheets 114, 2023 (2013) | Cutoff date: 23-SEP-2013
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-6950 keV 70 | S(n)= 7862 keV 18 | S(p)= 2812 keV 18 | Q(α)= 7665 keV 4 | ||
| Reference: 2012WA38 |
| References: | |||
| A | 219U α decay (42 μs) | B | 170Er(50Ti,5nγ) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | Final Levels | |
| 0.0 | AB | (1/2-) | 1.2 s 2 % α = 100 | |||
| 560.8 2 | B | (5/2-) | 560.8 2 | 0.0 | (1/2-) | |
| 1421.3 3 | B | 860.5 2 | 560.8 | (5/2-) | ||
| 1421.3+X? | B | 0.77 µs 6 % IT ≈ 100 | X | 1421.3 | ||
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (1/2-) | 1.2 s 2 % α = 100 | No ε decay observed (<1.5% in 1968Va18). E(level): No ε decay observed (<1.5% in 1968Va18). |
| 1421.3 | E(level): From comparison of energies and half-lives of 9/2- isomers in neighboring nuclei, 9/2- is ruled out. Two possibilities have been discussed by 2005Ku31: 860.5γ may be E3 transition from 11/2+ to 1/2-, which gives half-life consistent with Weisskopf estimates; or there is a level above 1421.3 keV from which a low-energy highly converted transition is omitted. 2005Ku31 could not rule out any of these two possibilities. Jπ(level): From comparison of energies and half-lives of 9/2- isomers in neighboring nuclei, 9/2- is ruled out. Two possibilities have been discussed by 2005Ku31: 860.5γ may be E3 transition from 11/2+ to 1/2-, which gives half-life consistent with Weisskopf estimates; or there is a level above 1421.3 keV from which a low-energy highly converted transition is omitted. 2005Ku31 could not rule out any of these two possibilities. | ||
| 1421.3+X | 0.77 µs 6 % IT ≈ 100 | E(level): From comparison of energies and half-lives of 9/2- isomers in neighboring nuclei, 9/2- is ruled out. Two possibilities have been discussed by 2005Ku31: 860.5γ may be E3 transition from 11/2+ to 1/2-, which gives half-life consistent with Weisskopf estimates; or there is a level above 1421.3 keV from which a low-energy highly converted transition is omitted. 2005Ku31 could not rule out any of these two possibilities. Jπ(level): From comparison of energies and half-lives of 9/2- isomers in neighboring nuclei, 9/2- is ruled out. Two possibilities have been discussed by 2005Ku31: 860.5γ may be E3 transition from 11/2+ to 1/2-, which gives half-life consistent with Weisskopf estimates; or there is a level above 1421.3 keV from which a low-energy highly converted transition is omitted. 2005Ku31 could not rule out any of these two possibilities. |
215Th evaluated by B. Singh
1968Va18: activity was produced by 206Pb(16O,7N), E=90-160 MeV, and identified by excitation functions, genetic relationship to daughter nuclei, and agreement with α-particle energy decay systematics.
2000He17: activity was produced by 170Er(51V,p5n), E=214-286 MeV, and separated from the beam with a velocity filter. The activity was identified by excitation functions, and by its genetic relationship to daughter nuclei. Measured Eα, αγ coin. Detectors: Ge, Si.
2007Le14: 215Th produced in 182W(40Ar,X), E=191,197 MeV at JYFL, Jyvaskyla facility, RITU separator, GREAT spectrometer for particle detection. Measured α-particle spectrum and half-life
Q-value: S(2n)=17340 70, S(2p)=4014 22, Q(εp)=3540 10 (2012Wa38)