ADOPTED LEVELS, GAMMAS for 64Mn
Authors: Balraj Singh and Jun Chen | Citation: Nucl. Data Sheets 178, 41 (2021). | Cutoff date: 12-Nov-2021
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=11981 keV 6 | S(n)= 4173 keV 5 | S(p)= 14100 keV 70 | Q(α)= -1.233×104 keV 18 | ||
Reference: 2021WA16 |
References: | |||
A | 64Cr β- decay (42.9 MS) | B | 64Mn IT decay (440 MS) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | AB | 1(+) | 90 ms 4 % β- = 100 % β-n = 2.7 6 | |||||
40.2 3 | B | (2-) | 40.2 3 | 100 | (E1) | 0.0 | 1(+) | |
175.5 4 | B | (4+) | 440 ms 49 % IT = 100 | 135.3 3 | 100 | (M2) | 40.2 | (2-) |
186.4 3 | A | (2+) | 186.4 3 | 100 | 0.0 | 1(+) | ||
1148.7 4 | A | (1+) | 962.3 2 | 100 | 186.4 | (2+) |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
40.2 | (2-) | 40.2 3 | (E1) | 0.6 | α=0.6 4 | |
175.5 | (4+) | 440 ms 49 % IT = 100 | 135.3 3 | (M2) | 0.11 | B(M2)(W.u.)=8.8×10-5 +11-9, α=0.11 3 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 1(+) | 90 ms 4 % β- = 100 % β-n = 2.7 6 | μ=+2.085 3 (2015He28,2019StZV), Q=+0.21 11 (2015He28,2021StZZ) %β-n=2.7 6 in 2012Pa39, determined from the absolute intensity of the 995-keV γ ray (from 63Fe β- decay) as 43% 8 and the total number of 64Mn decays. Other: 33% 2 (2000HaZL, from β and n measurements). |
E(level) | E(gamma) | Comments |
40.2 | 40.2 | E(γ): from 64Mn IT decay |
175.5 | 135.3 | E(γ): from 64Mn IT decay |
186.4 | 186.4 | E(γ): from 64Cr β- decay |
1148.7 | 962.3 | E(γ): from 64Cr β- decay |
1985Gu14: 64Mn formed in fragmentation of 86Kr beam at 33 MeV/nucleon with Ti and Ta targets, identification by time-of-flight method using ΔE-E detectors at GANIL.
1994Se12 and 1990Tu01: Th(p,F) E=800 MeV reaction followed by time-of-flight detection of fission fragments to identify 64Mn and measured its mass using Time-of-Flight Isochronous (TOFI) spectrometer at the Los Alamos Meson Physics Facility (LAMPF)
1998Am04: 64Mn formed in fragmentation of 86Kr beam, fragment mass separator. Measured T1/2 at GSI.
1998Gr14: 64Mn formed in fragmentation of 86Kr beam at 60.3 MeV/nucleon with Ni target. Measured Eγ, Iγ, γ(t), (fragment)γ coin, T1/2 at GANIL.
2002MaZN (thesis): 64Mn obtained from fragmentation of 86Kr beam at 57.8 MeV/nucleon with a 9Be target, LISE2000 spectrometer at GANIL facility. Measured half-life from timing of β measurement.
2011Da08: 64Mn produced in the fragmentation of 57.8 MeV/nucleon 86Kr beam impinged on 50 mg/cm2 thick tantalum target using LISE-2000 spectrometer at GANIL facility. Detector system included a three-element Si-detector telescope containing a double-sided silicon-strip detector (DSSSD) backed by a Si(Li) detector and surrounded by four clover type EXOGAM Ge detectors. Product identified by mass, atomic number, charge, energy loss and time of flight. Measured half-life.
2012Na15: measured precise mass excess using RILIS facility and ISOLTRAP mass spectrometer at CERN facility
2015He28: measurement of spin, static magnetic dipole moment and electric quadrupole moment of the g.s. 64Mn beam produced in U(p,X) reaction at E(p)=1.4 GeV at CERN-ISOLDE facility using a RILIS ion source. Measured hyperfine structure using collinear laser spectroscopy (COLLAPS) technique. Deduced hyperfine constants for 3d54s2 6S5/2 -> 3d54s4p 6P3/2 ground state atomic transition with wave number=35689.980 cm-1, spin, magnetic dipole moment and electric quadrupole moment of the ground state of 64Mn. The magnetic dipole moment of 55Mn, μ=+3.46871790 9 was used as a standard reference for the other Mn isotopes. (Note: 2015He28 quote μ=+3.4687179 9 for 55Mn in their Table I). Comparison with large-scale shell-model calculations using GXPF1A and LNPS effective interactions, and with previous experimental results. The spin and moments for the (4+) isomer in 64Mn could not be measured in 2015He28 because of its short half-life of 0.44 ms
2016He14: E=1.4 GeV proton beam was produced from the ISOLDE facility at CERN. Target was a thick uranium carbide. Recoiling ions were ionized using the resonance ionization laser ion source (RILIS), mass-separated, cooled and bunched in the gas-filled RFQ ISCOOL, re-accelerated and guided to the laser spectroscopy beam line COLLAPS. Measured hyperfine spectra using collinear laser spectroscopy on atomic and ionic transitions, respectively. Deduced changes in mean-square charge radii relative to 55Mn. Comparisons with theoretical calculations. Systematics of neighboring nuclei.
Theory references for structure and other topics: four primary references in the NSR database at www.nndc.bnl.gov
Q-value: Q(β-n)=4575 6, S(2n)=10608 7, S(2p)=32350 260 (2021Wa16)