1. High-precision mass measurements for the isobaric multiplet mass equation atA= 52
- Author
-
Michael Block, V. S. Kolhinen, Iain Moore, Claes Fahlander, Anu Kankainen, Dmitrii Nesterenko, Annika Voss, Juha Äystö, Daniel Cox, J. Gerl, Tommi Eronen, Luis Sarmiento, Ari Jokinen, Ch. Lorenz, Pavel Golubev, L. Canete, Jukka Koponen, Philippos Papadakis, N. Lalović, J. Hakala, Juuso Reinikainen, U. Forsberg, Sami Rinta-Antila, Dirk Rudolph, and Helsinki Institute of Physics
- Subjects
massaspektrometria ,Nuclear and High Energy Physics ,isobaric multiplet ,Proton ,Co-52 ,Proton decay ,astrofysiikka ,Penning trap ,FOS: Physical sciences ,kupari ,Quadratic form (statistics) ,atomipainot ,114 Physical sciences ,01 natural sciences ,7. Clean energy ,PENNING TRAPS ,0103 physical sciences ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment ,010306 general physics ,Multiplet ,mass measurement ,Physics ,isotoopit ,SPECTROSCOPY ,010308 nuclear & particles physics ,MIRROR NUCLEI ,RAMSEY METHOD ,MN-52 ,Mass formula ,ANALOG STATES ,PROTON RADIOACTIVITY ,COULOMB DISPLACEMENT ENERGIES ,Isobaric process ,BETA-RAY ,Atomic physics ,ydinfysiikka ,DECAY ,Excitation - Abstract
Masses of $^{52}$Co, $^{52}$Co$^m$, $^{52}$Fe, $^{52}$Fe$^m$, and $^{52}$Mn have been measured with the JYFLTRAP double Penning trap mass spectrometer. Of these, $^{52}$Co and $^{52}$Co$^m$ have been experimentally determined for the first time and found to be more bound than predicted by extrapolations. The isobaric multiplet mass equation for the $T=2$ quintet at $A=52$ has been studied employing the new mass values. No significant breakdown (beyond the $3\sigma$ level) of the quadratic form of the IMME was observed ($\chi^2/n=2.4$). The cubic coefficient was 6.0(32) keV ($\chi^2/n=1.1$). The excitation energies for the isomer and the $T=2$ isobaric analogue state in $^{52}$Co have been determined to be 374(13) keV and 2922(13) keV, respectively. The $Q$ value for the proton decay from the $19/2^-$ isomer in $^{53}$Co has been determined with an unprecedented precision, $Q_{p} = 1558.8(17)$ keV. The proton separation energies of $^{52}$Co and $^{53}$Ni relevant for the astrophysical rapid proton capture process have been experimentally determined for the first time. \end{abstract}, Comment: 12 pages, 13 figures, submitted to Phys. Rev. C (26.9.2016)
- Published
- 2017
- Full Text
- View/download PDF