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Impact broadening and shift of thallium two-photon transition 6P 1/2–9P 1/2,3/2 perturbed by argon and helium

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Il Nuovo Cimento D

Summary

This paper reports pressure broadening and shift coefficients of thallium 6P–9P 1/2,3/2 transitions by Ar and He as perturbers. Two-photon absorption Doppler free technique has been adopted. The perturing pressure ranges from 300 Torr to 7 atm at 978 K. The red-shift due to Ar and the blue-shift due to He are found to vary linearly with pressure. The Van der Waals constants for these transitions are also reported.

Riassunto

Questo lavoro tratta dell’aumento di pressione e dei coefficienti di spostamento delle transizioni 6P–9P 1/2,3/2 con Ar e He come perturbatori. È stata adottata una tecnica libera Doppler di adsorbimento a due fotoni. La pressione che perturba varia da 300 Torr a 7 atm a 978 K. Si trova che lo spostamento verso il rosso dovuto ad Ar e lo spostamento verso il blu dovuto ad He variano liberamente con la pressione. Si presentano anche le costanti di Van der Waals per queste transizioni.

Резюме

В этой статье исследуются коэффициенты уширения под действием давления и сдвига для переходов 6P–9P 1/2,3/2 в таллии, возмущенном Ar и He. Используется техника двух-фотонного поглощения. Рассматриваются давления от 300 торр до 7 атм при 978 К. Получено, что красный сдвиг, обусловленный Ar, и голубой сдвиг, обусловленный, He, изменяются линейно с давлением. Определяются постоянные Ван дер Ваальса для этих переходов.

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Naveed Ullah, K. Impact broadening and shift of thallium two-photon transition 6P 1/2–9P 1/2,3/2 perturbed by argon and helium. Il Nuovo Cimento D 11, 1349–1354 (1989). https://doi.org/10.1007/BF02450550

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  • DOI: https://doi.org/10.1007/BF02450550

PACS 78.20

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