Measurement of small photodestruction rates of cold, charged biomolecules in an ion trap

Measurement of small photodestruction rates of cold, charged biomolecules in an ion trap
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测量离子阱中冷带电生物分子的小光破坏率

DOI:
10.1088/0953-4075/42/3/035101
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发表时间:
2009
期刊:
Journal of Physics B: Atomic, Molecular and Optical Physics
影响因子:
--
通讯作者:
S. Schiller
S. Schiller
中科院分区:
--
文献类型:
--
作者:
D. Offenberg;Ch. Wellers;C. B. Zhang;B. Roth;S. Schiller

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在这项工作中,我们展示了对平移冷带电生物分子光破坏率的定量测量。分子离子在超高真空条件下长期稳定地存储在离子陷阱中,允许测量小速率并验证速率在光破坏激光强度中是线性的。用不同强度的连续波紫外光(266 Nm)对有机化合物甘草次酸(C30H46O4)的单质子化分子进行了测量。分子被同时捕获的激光冷却的钡离子同步冷却到低于150mK的平移温度。S−1的破坏率小于0.0 5,截面为(1.1±0.1)×10−17cm2。可调谐紫外激光光源的扩展将允许对各种各样的冷复杂分子进行高分辨率解离光谱研究。
In this work, we demonstrate quantitative measurements of photodestruction rates of translationally cold, charged biomolecules. The long-term stable storage of the molecular ions in an ion trap under ultra-high vacuum conditions allows measurement of small rates and verification that rates are linear in photodestruction laser intensity. Measurements were performed on singly protonated molecules of the organic compound glycyrrhetinic acid (C 30 H 46 O 4), dissociated by a continuous-wave UV laser (266 nm) using different intensities. The molecules were sympathetically cooled by simultaneously trapped laser-cooled barium ions to translational temperatures of below 150 mK. Destruction rates of less than 0.05 s− 1 and a cross section of (1.1±0.1)× 10− 17 cm 2 have been determined. An extension to tunable UV laser sources would permit high-resolution dissociation spectroscopic studies on a wide variety of cold complex molecules.
亚开尔文温度下离子阱中质子化蛋白质的平移冷却和储存
DOI: 10.1103/physreva.78.061401
发表时间: 2008
期刊: Physical Review A
影响因子: 2.9
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