ADOPTED LEVELS for 212Th
Authors: K. Auranen and E.A. Mccutchan | Citation: Nucl. Data Sheets 168, 117 (2020) | Cutoff date: 1-Aug-2020
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-9480 keV 80 | S(n)= 9870 keV 70 | S(p)= 2380 keV 50 | Q(α)= 7958 keV 5 | ||
| Reference: 2017WA10 |
| References: | |||
| A | 216U α decay (4.5 MS) | B | 216U α decay (0.7 MS) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
| 0.0 | AB | 0+ | 31.7 ms 13 % α ≈ 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 0+ | 31.7 ms 13 % α ≈ 100 | Measured Eα=7809 5 (2010He25) from decay of 212Th to 208Ra; assumed to be a g.s. to g.s. transition. Others: 7830 20 (2015De22), 7788 30 and 7806 30 from decay of two activities in 216U (2015Ma37). E(level): Measured Eα=7809 5 (2010He25) from decay of 212Th to 208Ra; assumed to be a g.s. to g.s. transition. Others: 7830 20 (2015De22), 7788 30 and 7806 30 from decay of two activities in 216U (2015Ma37). |
1980Ve01: 212Th produced in 176Hf(40Ar,4n) reaction with E(40Ar)=179 MeV. Separation using the velocity filter SHIP. Measured Eα, implant-α(t).
2010He25: 212Th produced in 152Sm(64Ni,4n) reaction with E(64Ni)=288 MeV from the UNILAC at GSI. Separation using the velocity filter SHIP followed by implantation into a position-sensitive silicon detector. Measured Eα, αα correlations, implant-α(t) using position-sensitive silicon strip detector surrounded by six silicon detectors in a box-like arrangement. Total of 1430 evaporation residue-α events were observed for 212Th.
2015Ma37: 216U activity from 180W(40Ar,4n) reaction with E(40Ar)=189.5 MeV from the Sector-Focusing Cyclotron facility at HIRFL-Lanzhou. Fragments separated with gas-filled recoil separator for heavy ions (SHANS). Measured Eα, αα correlations, implant-α(t) using position-sensitive silicon strip detector surrounded by eight silicon detectors in a box-like arrangement. Six correlated decay chains were observed for the ground state of 216U and two correlated decay chains were observed for an isomeric level in 216U. Results also presented in 2016Zh33.
2015De22: 216U activity from deep-inelastic multinucleon transfer reaction 248Cm(48Ca,X), with E(48Ca)=270 MeV from UNILAC at GSI. Fragments separated with velocity filter SHIP at GSI and implanted in position-sensitive silicon strip detector. Measured Eα, αα correlations, implant-α(t) using silicon strip detector surrounded by six silicon detectors in a box-like arrangement. 216U decay chain was identified in one sequence of three successive α decays.
Q-value: S(2n)=18091 21; S(2p)=2910 14; Q(εp)=3990 13 (2017Wa10)