Polarization of Light from Collision of a Proton Beam with Helium Atoms

Krause, Daniel; Soltysik, Edward A.

doi:10.1103/physrev.175.142

Cited by 9 publications

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“…Several theoretical investigations 8 " 11 of its electric and magnetic fs have been prompted by the observation of apparently spin-forbidden transitions in thermal He(ls 2 )-He*(ls/?p l P) collisions, after St. John and Fowler 12 proposed that these transitions are made possible by the singlet-triplet mixing in Isnl configurations with / > 3. Further interest in the Is 4/configuration has been stimulated by the observation that He triplet states are excited in p-He collisions 13 and He + 4 "-He collisions. 14 In a series of experiments 15 it has been demonstrated that these excitation processes proceed predominantly via the Is4/ configuration.…”

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Fine structure of the1s4fconfiguration of helium

et al. 1987

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By use of an rf electric resonance technique, the fine structure of the \s4f multiplet of He I and its splitting in a static electric field have been investigated. Our results for the fine-structure intervals v u between the l F 3 level and the 3 Fj levels are v l2 =232.8(2.0) MHz, v u =490.8(2.0) MHz, and vi3=704.3(l.0) MHz. Furthermore, a singlet-triplet mixing ratio 0=0.757(3) and the exchange interaction 2^ = 158(3) MHz have been derived from the measurements.

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“…: v13 (l), v 14 (D, v 14 (3), v 12 (D, and v 12 (l)/2, V14OV2. Here v\j( \ m | ) refers to a transition from the Signals of resonance transitions induced by an rf field E\ at v -397.4 MHz scanned by varying the staticelectric-field strength EQ.…”

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confidence: 99%