Even-parity autoionizing levels of atomic uranium and their total angular momenta

Mandal, Pijush Kanti; Das, Rakesh; Shah, M.L.; Dev, Vas

doi:10.1007/s00340-017-6765-0

Cited by 3 publications

(1 citation statement)

References 28 publications

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“…Considering the wavelength range of the second harmonic of the Ti:Sa laser, the even-parity levels (around 25 000 cm −1 ) and the odd-parity autoionization levels around the ionization potential (IP) of uranium (49958.4 cm −1 [16]) are suitable for a two-step resonant ionization. So far, RIMS [17][18][19][20][21][22][23][24][25] and PIOGS [9,[26][27][28] report some autoionizing levels of uranium. However, most of them are even-parity levels suited for a three-step ionization scheme.…”

Section: Introductionmentioning

confidence: 99%

Odd-parity autoionizing levels of uranium observed by two-color two-step photoionization optogalvanic spectroscopy

Miyabe¹,

Sato²,

Wakaida³

et al. 2021

J. Phys. B: At. Mol. Opt. Phys.

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Two-color two-step photoionization optogalvanic spectroscopy was performed using high-repetition-rate titanium sapphire lasers and a uranium hollow cathode lamp to find the two-step resonance ionization schemes of uranium. Many ionization transitions were observed by exciting uranium atoms in a ground state into five, even parity, excited levels with the first-step laser and by scanning the second-step laser wavelengths. By blocking the first-step laser, single-color, two-photon ionization transitions were also identified. From these results, we have found more than 50 odd-parity autoionizing levels of uranium in the energy, ranging from the ionization potential (49958.4 cm−1) to 51 150 cm−1. The determined energy levels are within ∼±1 cm−1 of previously reported values.

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