ADOPTED LEVELS for 207Ac
Authors: F.G. Kondev, S. Lalkovski | Citation: Nucl. Data Sheets 112, 707 (2011) | Cutoff date: 1-Aug-2010
Full ENSDF file | Adopted Levels (PDF version)
| S(n)= 1.039×104 keV SY | S(p)= -2.9×102 keV 6 | Q(α)= 7.84×103 keV 5 | |||
| Reference: 2012WA38 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0 | (9/2-) | 27 ms +11-6 % α ≈ 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | (9/2-) | 27 ms +11-6 % α ≈ 100 | Configuration=(π h9/2)+1. The assignment is tentative. |
1998Es02: activity produced by bombarding a 320 μg/cm thick 175Lu target with 198-MeV and 199-MeV 36Ar ions. The reaction products were separated by a gas-filled separator (RITU) and implanted into a position sensitive PIPS detector (800 mm wide and 35 mm high). Separate amplified branches for energy ranges 0.5-15 MeV (α-decay) and 2-200 MeV (reaction residues) were used. Decay of 207Ac was identified using 4 quadrupole events (recoil-α1-α2-α{-3) and 5 triple events of which three were (recoil-α1-α2) and two (recoil-α2-α3). The results also included 3 triple events from 1994Le05.
1998LuZV: activity produced by bombarding a 307 μg/cm2 hafnium target (64.6% 176Hf, 21.7% 177Hf, 6.8% 178Hf, 2.2% 179Hf and 4.7% 180Hf) with 186-MeV (effective energy at half-target thickness) 35Cl ions (beam intensity was about 600 enA). The reaction products were separated by a recoil mass separator at JAERI and implanted on position-sensitive silicon detector.
The results from 1998Es02 include raw data reported in 1994Le05
Q-value: Note: Current evaluation has used the following Q record 10450 90 280 60 7840 50 2003Au03