ADOPTED LEVELS for 212Pa
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)
| S(p)= -3.90×102 keV 10 | Q(α)= 8420 keV 50 | ||||
| Reference: 2017Wa10 |
| E(level) (keV) | T1/2(level) |
| 0.0 | 5.1 ms +51-17 % α ≈ 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 5.1 ms +51-17 % α ≈ 100 | Eα=8250 keV 20 from 2014Ya19, was obtained by combining the results of 2014Ya19 and 1997Mi03. Others: Eα=8270 keV 30 very likely is emitted from the g.s. of 212Pa (1997Mi03). |
1997Mi03: activity was produced in the 182W(35Cl,5n) reaction using a beam energy of 182.5 MeV. 212Pa was separated with the JAERI recoil mass separator and identified by time- and position-correlated alpha-decay chains
2014Ya19: nuclei of interest were produced in a 40Ca(E=193 MeV) + 175Lu complete fusion reaction at the HIRFL-Lanzhou facility. The target was a 500-μg/cm2-thick layer of natural Lu (>97.4% 175Lu) evaporated on a 40 μg/cm2 carbon backing. The residues were selected using gas-filled recoil separator SHANS, and implanted into a position sensitive silicon detectors. Time and position correlation were measured between evaporation residue implantation (Er) and the subsequent α-decay events. Eα, half-lives, Er-α-α correlations were measured.
Q-value: S(n)=8560 (syst) 130; S(2p)=1770 90; Q(εp)=7100 (syst) 90 (2017Wa10)