40 research outputs found
Low-energy structure of 61Mn populated following decay of 61Cr
decay of the Cr ground state has been studied. A new
half-life of 233 +/- 11 ms has been deduced, and seven delayed rays
have been assigned to the daughter, Mn. The low-energy level
structure of Mn is similar to that of the less neutron-rich
Mn nuclei. The odd-A Mn isotopes follow the systematic trend
in the yrast states of the even-even, Z + 1 Fe isotopes, and not that of
the Z - 1 Cr isotopes, where a possible onset of collectivity has been
suggested to occur already at N = 36.Comment: 19 pages, 7 figures, accepted to Physical Review
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Protein identification using a nanoUHPLC-AP-MALDI MS/MS workflow with CID of multiply charged proteolytic peptides
Liquid AP-MALDI can produce predominantly multiply charged ESI-like ions and stable durable analyte ion yields with samples allowing good shot-to-shot reproducibility and exhibiting self-healing properties during laser irradiation. In this study, LC-MALDI MS/MS workflows that utilize multiply charged ions are reported for the first time and compared with standard LC-ESI MS/MS for bottom-up proteomic analysis. The proposed method is compatible with trifluoroacetic acid as an LC ion pairing reagent and allows multiple MS/MS acquisitions of the LC-separated samples without substantial sample consumption. In addition, the method facilitates the storage of fully spotted MALDI target plates for months without significant sample degradation