Matches in SemOpenAlex for { <https://semopenalex.org/work/W4382775642> ?p ?o ?g. }
- W4382775642 abstract "We measured the spontaneous decays of internally hot copper and silver dimer anions, ${mathrm{Cu}}_{2}^{ensuremath{-}}$ and ${mathrm{Ag}}_{2}^{ensuremath{-}}$, stored in one of the two ion-beam storage rings of the Double Electrostatic Ion Ring Experiment (DESIREE) at Stockholm University. A coincidence detection technique was utilized enabling essentially background-free measurements of ${mathrm{Cu}}_{2}^{ensuremath{-}}phantom{rule{4pt}{0ex}}ensuremath{rightarrow}$ Cu $+ {mathrm{Cu}}^{ensuremath{-}}$ and ${mathrm{Ag}}_{2}^{ensuremath{-}}phantom{rule{4pt}{0ex}}ensuremath{rightarrow}$ Ag $+ {mathrm{Ag}}^{ensuremath{-}}$ fragmentation rates. Furthermore, the total rates of neutral decay products (monomers and dimers) were measured and the relative contributions of fragmentation and electron emission (${mathrm{Cu}}_{2}^{ensuremath{-}}phantom{rule{4pt}{0ex}}ensuremath{rightarrow}phantom{rule{4pt}{0ex}}{mathrm{Cu}}_{2} + {e}^{ensuremath{-}}$ and ${mathrm{Ag}}_{2}^{ensuremath{-}}phantom{rule{4pt}{0ex}}ensuremath{rightarrow}phantom{rule{4pt}{0ex}}{mathrm{Ag}}_{2} + {e}^{ensuremath{-}}$) were deduced as functions of storage time. Fragmentation is completely dominant at early times. However, after about 20 ms of storage, electron emission is observed and becomes the leading decay path after 100 ms for both dimer anions. The branching ratios between fragmentation and electron emission (vibrationally assisted autodetachment processes) are very nearly the same for ${mathrm{Cu}}_{2}^{ensuremath{-}}$ and ${mathrm{Ag}}_{2}^{ensuremath{-}}$ throughout the present storage cycle of 10 seconds. This is surprising considering the difference between the electron affinities of the neutral dimers, ${mathrm{Cu}}_{2}$ and ${mathrm{Ag}}_{2}$, and the difference between the ${mathrm{Cu}}_{2}^{ensuremath{-}}$ and the ${mathrm{Ag}}_{2}^{ensuremath{-}}$ dissociation energies." @default.
- W4382775642 created "2023-07-02" @default.
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- W4382775642 date "2023-06-30" @default.
- W4382775642 modified "2023-10-15" @default.
- W4382775642 title "Fragmentation of and electron detachment from hot copper and silver dimer anions: A comparison" @default.
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- W4382775642 doi "https://doi.org/10.1103/physreva.107.062824" @default.
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