Theoretical calculation of the differential cross section for He-BH collision system

Rong-Kai, Wang; Guang-Xian, Shen; Yang, Xiangdong

doi:10.7498/aps.58.5335

Cited by 2 publications

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“…Alexander et al [10] calculated the potential energy surface of the Ar-BH (A 1 Π, X 1 Σ) complex using a multi-reference configuration interaction method (MR-CI(D)). In 2009, Wang et al [11] calculated the elastic, the inelastic and the differential cross sections for the collisions between the He atom and the ground state of the BH molecule. However, to our knowledge, there is no report on boron family hydrides colliding with the rare-gas atom complex at very low energy.…”

Section: Introductionmentioning

confidence: 99%

Rotational relaxation in ultracold He+BH collisions

宫明艳¹,

许小涛²,

凤尔银³

2011

Chinese Phys. B

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Collisions of cold and ultracold BH in the ν = 0 level with the He atom are investigated using the quantum mechanical scattering formulation. The elastic and the inelastic cross sections are calculated using the two-dimensional ab initio potential energy surface. It is shown that the elastic cross section is larger than the inelastic one. When the collision energy is very low, the elastic cross section follows the Wigner threshold law and is one order of magnitude larger than that of He-O 2 , while it is much smaller than that of He-H 2 . The efficiency of the rotationally quenching state is given. The ∆j = −1 transition is most efficient. The resonances are also found to occur at about the same translational energy (0.1-1 cm −1 ), which gives rise to steps in the rate coefficient at temperatures around 0.1-1 K.

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Section: Introductionmentioning

confidence: 99%

Rotational relaxation in ultracold He+BH collisions

宫明艳¹,

许小涛²,

凤尔银³

2011

Chinese Phys. B

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“…[12] The potential was used to calculate elastic, inelastic and total differential cross sections for collisions between the He atom and the ground state of the BH molecule by Wang et al in 2009. [13] In the present work, we keep investigating the rovibrational relaxation at cold temperatures, including the relative efficiency of the double and single vibrational quantum de-excitation processes, the translational energy dependences of cross sections and rate coefficients, and the final rotational distributions. To our knowledge, there is as yet no report in these areas.…”

Section: Introductionmentioning

confidence: 99%

Rovibrational quenching of BH in ultracold³He collisions

Gong¹,

Hu²,

Xia³

et al. 2010

Chinese Phys. B

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The interaction potential of a He-BH complex is investigated by the coupled-cluster single-double plus perturbative triples (CCSD (T)) method and an augmented correlation consistent polarized valence (aug-cc-pV)5Z basis set extended with a set of (3s3p2d1f1g) midbond functions. Using the five two-dimensional model potentials, the first threedimensional interaction potential energy surface is constructed by interpolating along (r-re) by using a fourth-order polynomial. The cross sections for the rovibrational relaxation of BH in cold and ultracold collisions with 3 He atom are calculated based on the three-dimensional potential. The results show that the ∆v = −1 transition is more efficient than the ∆v = −2 transition, and that the process of relaxation takes place mainly between rotational energy levels with the same vibration state and the ∆j = −1 transition is the most efficient. The zero temperature quenching rate coefficient is finite as predicted by Wigner's law. The resonance is found to take place around 0.1-1 cm −1 translational energy, which gives rise to a step in the rate coefficients for temperatures around 0.1-1 K. The final rotational distributions in the state v = 0 resulting from the quenching of state (v = 1, j = 0) at three energies corresponding to the three different regimes are also given.

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Theoretical calculation of the differential cross section for He-BH collision system

Cited by 2 publications

References 0 publications

Rotational relaxation in ultracold He+BH collisions

Rotational relaxation in ultracold He+BH collisions

Rovibrational quenching of BH in ultracold³He collisions

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Theoretical calculation of the differential cross section for He-BH collision system

Cited by 2 publications

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Rotational relaxation in ultracold He+BH collisions

Rotational relaxation in ultracold He+BH collisions

Rovibrational quenching of BH in ultracold3He collisions

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Rovibrational quenching of BH in ultracold³He collisions