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Hyperfine structures and the field effects of ibr molecule in its rovibronic ground state

Chinese Physics B 2021年第11期30卷 304-308页

作者： Defu Wang Xuping Shao Yunxia Huang Chuanliang Li Xiaohua Yang School of Science Nantong UniversityNantong 226019China Department of Physics Taiyuan University of Science and TechnologyTaiyuan 03324China

Hyperfine structures and the field effects of ibr molecule in its rovibronic ground state are theoretically studied by diagonalizing the effective Hamiltonian *** of high-J levels up to 4 are taken into account when studying the hyperfine sub-levels of the J=0 level,and thus,an 80×80 matrix is constructed and *** of the experimentally absent molecular constants are computed using Dalton *** results will be helpful in the experimental investigation of manipulation and further cooling of cold ibr molecules.

关键词： hyperfine structure Zeeman effect Stark effect ibr molecule

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Mixed-field effect at the hyperfine level of^(127)I^(79)Br in its rovibronic ground state:Toward field manipulation of cold molecules

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Chinese Physics B 2023年第12期32卷 312-317页

作者：包正斌王得富邵旭萍黄云霞杨晓华 School of Science Nantong UniversityNantong 226019China

The mixed-field effect at the hyperfine level of the rovibronic ground state of the^(127)I^(79)Br(X^(1)Σ,v=0,J=0)molecule is computed on the J-I uncoupled basis of|JM_(J)I_(1)M_(1)I_(2)M_(2)>,where J is the molecular total angular momentum excluding nuclear spin,M_J is the projection number of J,I_(1) and I_(2) are the nuclear spins of the iodine and bromine atoms,and M_(1) and M_(2) are the projection numbers of I_(1) and I_(2),*** the two applied electric and magnetic fields are parallel,the perturbations are rare and only one perturbation is observed in a relatively large field regime in our computation ***,when the two fields are off-parallel,the perturbations increase significantly and some sublevels show the Feshbach-like resonance ***,such sublevels transit between weak-field seeking and strong-field seeking repeatedly,which can be utilized to enhance or suppress cold molecular collision and chemical reaction *** behavior of the molecular hyperfine structure in the mixed off-parallel fields may also be utilized to construct an electric-field-assisted anti-Helmholtz magnetic trap for cold molecules and to realize evaporative cooling of cold molecules(sub-mK)into the ultracold regime(μK).

关键词： hyperfine structure mixed Zeeman and Stark effect evaporative cooling ibr molecule

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