Zeeman relaxation of MnH (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>X</mml:mi><mml:msup><mml:mrow /><mml:mrow><mml:mn>7</mml:mn></mml:mrow></mml:msup><mml:msup><mml:mi>Σ</mml:mi><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>) in collisions with<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">He</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>3</mml:mn

Turpin, F.; Stoecklin, Thierry; Halvick, Philippe

doi:10.1103/physreva.83.032717

Cited by 5 publications

(8 citation statements)

References 39 publications

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“…For the He-NH ( 3 − ) system, González-Martínez and Hutson [24] located two very narrow zero-energy Feshbach resonances. Very recently, Turpin et al [25] studied the Zeeman relaxation of a high spin electronic state molecule, MnH ( 7 + ), in collisions with 3 He and gave a comparison with experiment. Stoecklin and Gianturco and coworkers further extended the study to the ionic molecule collision: He-N 2 + ( 2 ) [26][27][28], He-OH − (X 1 + ) [29], He-OH + ( 3 − ) [30], and He-LiH − (X 2 + ) [31].…”

Section: Introductionmentioning

confidence: 99%

Cold collisions of PH (3Σ−) with helium in magnetic fields

Feng

Sun

et al. 2011

Phys. Rev. A

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A theoretical investigation of the He-PH ( 3 − ) complex is presented. We perform ab initio calculations of the interaction potential energy surface and discuss its error bounds with relevance to cold collisions, and we carry out accurate calculations of bound energy levels of the complex including the molecular fine structure and magnetic-field effect. We find the potential has two shallow minima and supports ten and 13 bound levels in complex with 3 He and 4 He, respectively. Based on the potential the quantum scattering calculations are then implemented for elastic and inelastic cross sections of the magnetically trappable low-field-seeking state of PH ( 3 − ) in collision with 3 He atom. The cold-collision properties and the influence of the external magnetic field as well as the effect of the uncertainty of interaction potential on the collisionally induced Zeeman relaxation are explored and discussed in detail. The ratio of elastic to inelastic cross sections is large over a wide range of collision energy, magnetic field, and scaling factor of the potential, so that helium buffer-gas loading and evaporative cooling of PH is a good prospect.

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Section: Introductionmentioning

confidence: 99%

Cold collisions of PH (3Σ−) with helium in magnetic fields

Feng

Sun

et al. 2011

Phys. Rev. A

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“…Here we use a simple extension of the method developed by Krems and Dalgarno 27 to treat the collisional spin depolarisation of a diatomic molecule in a 3 S state in collision with a structureless atom submitted to a magnetic field. The only difference with our previous studies 35,39 of this system lies in the fact that we include hyperfine terms in the diatomic Hamiltonian. The rigid rotor Hamiltonian is again written like:…”

Section: Calculationsmentioning

confidence: 93%

“…35 As the nuclear spin of manganese is 5/2 we study the relaxation cross sections of the spin stretched state…”

Section: Calculationsmentioning

confidence: 99%

“…Examples of such studies involving molecules in a S state are He À O 2 ( 3 S), 26 He + CaH( 2 S + ) and Ar + NH( 3 S À ), 27 He À NH( 3 S À ), [28][29][30][31] He À N 2 + ( 2 S + ) [32][33][34] and He À MnH( 7 S + ). 35 In all these studies the hyperfine structures of both 3 He and the molecules were neglected as the collision energies considered were larger than the hyperfine structure splitting. In the case of He À MnH, however, the calculated ratio of the elastic to inelastic cross section was found to be larger than its experimental estimate.…”

Section: Introductionmentioning

confidence: 99%

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Collisional relaxation of MnH (X7Σ+) in a magnetic field: effect of the nuclear spin of Mn

Stoecklin

Halvick

2011

Phys. Chem. Chem. Phys.

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In the present study we investigate the role played by the hyperfine structure of manganese in the cooling and magnetic trapping of MnH((7)Σ(+)). The effect of the hyperfine structure of Mn on the relaxation of the magnetically trappable maximally stretched low-field seeking state of MnH((7)Σ(+)) in collisions with (3)He is deduced from comparison between the results of the present approach and our previous nuclear spin free calculations. We show that our previous results are unchanged at the temperature of the buffer gas cooling experiment but find a new resonance at very low collision energy. The role played by the different contributions to the hyperfine diatomic Hamiltonian considered in this work as well as the effect of an applied magnetic field on this resonance are also analyzed.

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“…Several groups have used this representation to study the effects of external electric, magnetic, and microwave fields on atom-molecule [11,12,23,[31][32][33][34] and molecule-molecule [35][36][37] collisions.…”

Section: Introductionmentioning

confidence: 99%

Total-angular-momentum representation for atom-molecule collisions in electric fields

Tscherbul

2012

Phys. Rev. A

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It is shown that the atom-molecule collision problem in the presence of an external electric field can be solved using the total angular momentum representation in the body-fixed coordinated frame, leading to a computationally efficient method for ab initio modeling of low-temperature scattering phenomena. Our calculations demonstrate rapid convergence of the cross sections for vibrational and Stark relaxation in HeCaD collisions with the number of total angular momentum states in the basis set, leading to a 5-100 fold increase in computational efficiency over the previously used methods based on the fully uncoupled space-

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Zeeman relaxation of MnH (X7Σ+) in collisions withHe3

Cited by 5 publications

References 39 publications

Cold collisions of PH (3Σ−) with helium in magnetic fields

Cold collisions of PH (3Σ−) with helium in magnetic fields

Collisional relaxation of MnH (X7Σ+) in a magnetic field: effect of the nuclear spin of Mn

Total-angular-momentum representation for atom-molecule collisions in electric fields

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