Photoionization cross section of first excited state of lithium

被引：1

作者：

Saakyan, Sergey ^{[1
,2
]}

D'yachkov, Lev ^{[1
]}

Klimov, Stepan ^{[1
]}

Sautenkov, Vladimir ^{[1
]}

Zelener, Boris B. ^{[1
]}

机构：

[1] Russian Acad Sci JIHT RAS, Joint Inst High Temp, Izhorskaya St 13 Bld 2, Moscow 125412, Russia

[2] Natl Res Univ Higher Sch Econ NRU HSE, Myasnitskaya Ulitsa 20, Moscow 101000, Russia

来源：

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 2022年 / 195卷

基金：

俄罗斯科学基金会;

关键词：

Photoionization cross section; Laser cooling and trapping; Lithium; Light -emitting diodes; ATOMS; TRAP; RECOMBINATION; COLLISIONS; DENSITY; SODIUM; GAS;

D O I：

10.1016/j.sab.2022.106503

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

We report the accurate quantitative measurements of the photoionization (PI) cross section of lithium-7 confined in a magneto-optical trap (MOT). The losses from the MOT induced by radiation of the low-power light-emitting diodes (LEDs) are measured as a function of the photoionizing radiation intensity. On the basis of these measurements, the PI cross section from the 2P(3/2) excited state of lithium is evaluated for three different LEDs. The PI cross sections of lithium from the 2P(3/2) state at 259, 280, 307 nm are determined to be (5.4 +/- 0.4), (8.1 +/- 0.8) and (9.5 +/- 1.1) Mb respectively. Accuracy of our measurements is better than that of previous reported results. The semiclassical calculations taking into account the fine structure of the first excited state of lithium are performed. Our values are in good agreement with experimental results earlier reported and are consistent with the theoretical data.

引用

页数：7

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