Abstract
Due to the similar physical and chemical properties, isotopes are usually hard to separate. On the other hand, the isotope shifts are very well separated in a high-resolution spectrum, making them possible to be addressed individually by lasers, thus separated. Here we report such an isotope separation experiment with Potassium atoms. The isotopes are independently optical pumped to the desired spin states, and then separated with a Stern-Gerlach scheme. A micro-capillary oven is used to collimate the atomic beam, and a Halbach-type magnet array is used to deflect the desired atoms. Finally, the 40K is enriched by two orders of magnitude. This magneto-optical combined method provides an effective way to separate isotopes and can be extended to other elements if the relevant optical pumping scheme is feasible.
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K. A. Lyakhov, H. J. Lee, and A. N. Pechen, Some issues of industrial scale boron isotopes separation by the laser assisted retarded condensation (SILARC) method, Separ. Purif. Tech. 176, 402 (2017)
T. R. Mazur, B. Klappauf, and M. G. Raizen, Demonstration of magnetically activated and guided isotope separation, Nat. Phys. 10(8), 601 (2014)
H. M. Zhang and S. G. Li, Deep carbon recycling and isotope tracing: Review and prospect, Sci. China Earth Sci. 55, 1929 (2012)
E. J. Bartelink and L. A. Chesson, Recent applications of isotope analysis to forensic anthropology, Forensic Sci. Res. 4(1), 29 (2019)
D. J. Wilkinson, Historical and contemporary stable isotope tracer approaches to studying mammalian protein metabolism, Mass Spectrom. Rev. 37(1), 57 (2018)
R. A. Muller, Radioisotope dating wit a cyclotron, Science 196(4289), 489 (1977)
C. Y. Chen, Y. M. Li, K. Bailey, T. P. O’Connor, L. Young, and Z. Lu, Ultrasensitive isotope trace analyses with a magneto-optical trap, Science 286(5442), 1139 (1999)
A. L. Yergey and A. K. Yergey, Preparative scale mass spectrometry: A brief history of the calutron, J. Am. Soc. Mass Spectrom. 8(9), 943 (1997)
L. O. Love, Electromagnetic separation of isotopes at Oak Ridge, Science 182(4110), 343 (1973)
V. S. Letokhov, Laser isotope separation, Nature 277(5698), 605 (1979)
T. Arisawa, Y. Maruyama, Y. Suzuki, and K. Shiba, Lithium isotope separation by laser, Appl. Phys. B 28, 73 (1982)
J. A. Paisner, Atomic vapor laser isotope separation, Appl. Phys. B 46(3), 253 (1988)
P. Greenland, Laser isotope separation, Contemp. Phys. 31(6), 405 (1990)
T. Kieck, H. Dorrer, C. E. Dullmann, V. Gadelshin, F. Schneider, and K. Wendt, Highly efficient isotope separation and ion implantation of 163Ho for the ECHo project, Nucl. Instrum. Methods Phys. Res. A 945, 162602 (2019)
A. Bernhardt, Isotope separation by laser deflection of an atomic beam, Appl. Phys. (Berl.) 9(1), 19 (1976)
L. Li, Y. Wang, and M. Li, Separation of Li isotopes by laser defection of atomic beams, Chin. Phys. 3(1), 155 (1983)
X. Zhu, G. Huang, G. Mei, and D. Yang, Laser isotope enrichment of lithium by magnetic deflection of a polarized atomic beam, J. Phys. At. Mol. Opt. Phys. 25(15), 3307 (1992)
M. Jerkins, I. Chavez, U. Even, and M. G. Raizen, Efficient isotope separation by single-photon atomic sorting, Phys. Rev. A 82(3), 033414 (2010)
M. G. Raizen and B. Klappauf, Magnetically activated and guided isotope separation, New J. Phys. 14(2), 023059 (2012)
B. DeMarco and D. Jin, Onset of Fermi degeneracy in a trapped atomic gas, Science 285(5434), 1703 (1999)
E. Haller, J. Hudson, A. Kelly, D. A. Cotta, B. Peaudecerf, G. D. Bruce, and S. Kuhr, Single-atom imaging of fermions in a quantum-gas microscope, Nat. Phys. 11(9), 738 (2015)
L. W. Cheuk, M. A. Nichols, M. Okan, T. Gersdorf, V. V. Ramasesh, W. S. Bakr, T. Lompe, and M. W. Zwierlein, Quantum-gas microscope for fermionic atoms, Phys. Rev. Lett. 114(19), 193001 (2015)
M. A. Nichols, L. W. Cheuk, M. Okan, T. R. Hartke, E. Mendez, T. Senthil, E. Khatami, H. Zhang, and M. W. Zwierlein, Spin transport in a Mott insulator of ultracold fermions, Science 363(6425), 383 (2019)
T. G. Tiecke, Properties of potassium, University of Amsterdam, The Netherlands, Thesis, 2010, pp 12–14
R. Senaratne, S. V. Rajagopal, Z. A. Geiger, K. M. Fujiwara, V. Lebedev, and D. M. Weld, Effusive atomic oven nozzle design using an aligned microcapillary array, Rev. Sci. Instrum. 86(2), 023105 (2015)
P. Rosenberg, Collision cross sections of K atoms and K2 molecules in gases, Phys. Rev. 55(12), 1267 (1939)
Acknowledgements
We acknowledge the support from the National Key R&D Program of China under Grant No. 2018YFA0307200, the National Natural Science Foundation of China under Grant No. 12074337, the Natural Science Foundation of Zhejiang Province under Grant Nos. LR21A040002 and LZ18A040001, Zhejiang Province Plan for Science and Technology No. 2020C01019, and the Fundamental Research Funds for the Central Universities under Grant Nos. 2020XZZX002-05 and 2021FZZX001-02.
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This article can also be found at https://doi.org/10.1007/s11467-021-1129-y.
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Zeng, Z., Li, S. & Yan, B. Isotope separation of Potassium with a magneto-optical combined method. Front. Phys. 17, 32502 (2022). https://doi.org/10.1007/s11467-021-1129-y
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DOI: https://doi.org/10.1007/s11467-021-1129-y