Spectroscopic detection of radiocarbon dioxide at parts-per-quadrillion sensitivity

被引：128
作者：
Galli, Iacopo [1 ,2 ]
Bartalini, Saverio [1 ,2 ]
Ballerini, Riccardo [2 ]
Barucci, Marco [3 ]
Cancio, Pablo [1 ,2 ]
De Pas, Marco [2 ]
Giusfredi, Giovanni [1 ,2 ]
Mazzotti, Davide [1 ,2 ]
Akikusa, Naota [4 ]
De Natale, Paolo [1 ,2 ]
机构：
[1] CNR, INO, Via Carrara 1, I-50019 Sesto Fiorentino, FI, Italy
[2] European Lab Nonlinear Spect LENS, Via Carrara 1, I-50019 Sesto Fiorentino, FI, Italy
[3] CNR, INO, Largo Fermi 6, I-50125 Florence, FI, Italy
[4] Hamamatsu Photon KK, Dev Bur Laser Device R&D Grp, Shizuoka 4348601, Japan
来源：
OPTICA | 2016年 / 3卷 / 04期
关键词：
RING-DOWN SPECTROSCOPY; C-14; (CO2)-C-14; LASER; CO2;
D O I：
10.1364/OPTICA.3.000385
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
High-sensitivity radiocarbon detection has been, until now, a prerogative of accelerator mass spectrometry (AMS). Here we present a compact and simple spectroscopic apparatus, based on saturated-absorption cavity ring-down, approaching the ultimate AMS sensitivity. We measure radiocarbon dioxide concentration down to a few parts per quadrillion by use of a heterodyne-spectroscopy system with two quantum cascade lasers at 4.5 mu m, a reference cell, and a high-finesse cavity with the sample gas cooled down to 170 K. Our results pave the way to a paradigm change in radiocarbon measurement, with a number of significant applications in areas such as environment, nuclear security, pharmacology, and cultural heritage. (C) 2016 Optical Society of America
引用
收藏
页码：385 / 388
页数：4
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