ADOPTED LEVELS for 46Mn
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 20-FEB-2010
Author: S. -c. Wu | Citation: Nucl. Data Sheets 91, 1 (2000) | Cutoff date: 15-Jul-2000
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-1.35×104 keV SY | S(n)= 1.59×104 keV SY | S(p)= 7.E2 keV SY | Q(α)= -7.8×103 keV SY | ||
| Reference: 2012WA38 |
| References: | |||
| A | 46Fe ε decay (13.0 MS) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
| 0.0 | A | (4+) | 36.2 ms 4 % ε = 100 % εp = 57.0 8 |
| 5017 71 | A | 0+ |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (4+) | 36.2 ms 4 % ε = 100 % εp = 57.0 8 | T=2 XREF: α(?). |
| 5017 | 0+ | This state is expected to decay by proton emission. The 2p decay mode is energetically possible but predicted rate is small. From measurements in 2007Do17, only 7.9% 32 proton branch is known, with no evidence for 2p decay mode. |
1992Bo37, 1987Po04: 46Mn observed from interaction of a 58Ni beam at E(58Ni)=55 MeV/u and 69 MeV/u with natural nickel target using magnetic separation, Wien filter and identification through time-of-flight and ΔE-E measurements. β+ decay scheme observed
2001Gi01 (also 2001Gi02): Ni(58Ni,X) E=74.5 MeV/nucleon. Fragments selected by the α-LISE3 fragment separator with a Be degrader and Wien filter at GANIL. Ions implanted in a Si-detector telescope which measured ΔE, E, and position. With tof measurements, started both by the cyclotrons’ high-frequency and a micro-channel plate detector before the Wien filter, implanted ions could be identified. The telescope was surrounded by Ge detectors to measure γ’s in the radioactive decay.
1994Bl10: 9Be(58Ni,X) E=650 MeV/nucleon, Fragment separator FRS at GSI facility, measured cross section for the production of 46Mn
2007Do17: 46Mn produced in fragmentation of 58Ni26+ beam at 74.5 MeV/nucleon with natural Ni target at SISSE/LISE3 facility in GANIL. Fragment separator=α-LISE3. Fragment identification by energy loss, residual energy and time-of-flight measurements using two micro-channel plate (MCP) detectors and Si detectors. Double-sided silicon-strip detectors (DSSSD) and a thick Si(Li) detector were used to detect implanted events, charged particles and β particles. The γ rays were detected by four Ge detectors. Coincidences measured between charged particles and γ rays. T1/2 measured by time correlation of implantation events due to 46Mn and subsequent emission of protons and/or γ rays. Total proton branching ratio is from time spectrum of events with energy >900 keV in the charged-particle spectrum. Possible small contributions from delayed-α and delayed-2p decays are ignored. 2007Do17 and 2001Go01 are from the same group. Some of the results in 2007Do17 are an improved analysis of experiments reported in 2001Gi01
Mass excess of g.s.=-12490 30 (2007Do17), -12375 120 (1992Bo37) from IMME analysis
Structure calculations using shell model: 1999Ca12: levels, B(E2), G-T sum rules, etc.
Q-value: Note: Current evaluation has used the following Q record -13130 syst 15330 syst 690 syst -6630 syst 2009AuZZ,2003Au03
Q-value: Estimated uncertainties: 370 for Q(β-), 320 for S(n), 520 for S(p), 230 for Q(α) (2009AuZZ,2003Au03).
Q-value: Q(εp)=12220 110 (syst,2009AuZZ,2003Au03)