Photoelectron imaging of size-selected metal cluster anions in a quasi-continuous mode
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説明
We present a novel high-repetition-rate photoelectron imaging (PEI) apparatus for exploring electronic structures of metal cluster anions. A continuous beam of mass-selected metal cluster anions, generated by a magnetron-sputtering cluster-ion source coupled with a quadrupole mass filter, is chopped into sub-megahertz ion bunches using a high-voltage pulser. The quasi-continuous anion beam is introduced into a PEI spectrometer, where the anions are photodetached using a 404 nm (3.07 eV) continuous-wave laser diode. As a demonstration, we acquire photoelectron images for size-selected Ag cluster anions, Ag_N̄ (N = 3, 7, 14), and show that each image can be obtained in a short accumulation time (50 s) with a kinetic energy resolution (ΔE/E) of 4% at E = 1.77 eV. The quasi-continuous PEI technique enables high-count-rate, space-charge-free acquisition of photoelectron spectra and angular distributions not only from size-selected metal cluster anions but also from anions prepared by other continuous ion sources, such as electrospray ionization.
収録刊行物
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- Review of Scientific Instruments
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Review of Scientific Instruments 93 (8), 083302-, 2022-08-23
AIP Publishing
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詳細情報 詳細情報について
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- CRID
- 1050861482657152384
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- NII書誌ID
- AA12442307
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- ISSN
- 10897623
- 00346748
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- HANDLE
- 2324/4822554
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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- IRDB
- Crossref
- KAKEN