dorsal/arxiv
View SchemaMultichannel cold collisions between metastable Sr atoms
| Authors | Viatcheslav Kokoouline, Robin Santra, Chris H. Greene |
|---|---|
| Categories | |
| ArXiv ID | physics/0302094 |
| URL | https://arxiv.org/abs/physics/0302094 |
| DOI | 10.1103/PhysRevLett.90.253201 |
Abstract
We present a multichannel scattering calculation of elastic and inelastic cold collisions between two low-field seeking, metastable ^{88}Sr [(5s5p) ^3P_2] atoms in the presence of an external magnetic field. The scattering physics is governed by strong anisotropic long-range interactions, which lead to pronounced coupling among the partial waves of relative motion. As a result, nonadiabatic transitions are shown to trigger a high rate of inelastic losses. At relatively high energies, T > 100 mkK, the total inelastic collision rate is comparable with the elastic rate. However, at lower collisional energy, the elastic rate decreases, and at T ~ 1mkK, it becomes substantially smaller than the inelastic rate. Our study suggests that magnetic trapping and evaporative cooling of ^{88}Sr [(5s5p) ^3P_2] atoms, as well as ^{40}Ca [(4s4p) ^3P_2], in low-field seeking states will prove difficult to achieve experimentally.
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"abstract": "We present a multichannel scattering calculation of elastic and inelastic\ncold collisions between two low-field seeking, metastable ^{88}Sr [(5s5p)\n^3P_2] atoms in the presence of an external magnetic field. The scattering\nphysics is governed by strong anisotropic long-range interactions, which lead\nto pronounced coupling among the partial waves of relative motion. As a result,\nnonadiabatic transitions are shown to trigger a high rate of inelastic losses.\nAt relatively high energies, T \u003e 100 mkK, the total inelastic collision rate is\ncomparable with the elastic rate. However, at lower collisional energy, the\nelastic rate decreases, and at T ~ 1mkK, it becomes substantially smaller than\nthe inelastic rate. Our study suggests that magnetic trapping and evaporative\ncooling of ^{88}Sr [(5s5p) ^3P_2] atoms, as well as ^{40}Ca [(4s4p) ^3P_2], in\nlow-field seeking states will prove difficult to achieve experimentally.",
"arxiv_id": "physics/0302094",
"authors": [
"Viatcheslav Kokoouline",
"Robin Santra",
"Chris H. Greene"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevLett.90.253201",
"title": "Multichannel cold collisions between metastable Sr atoms",
"url": "https://arxiv.org/abs/physics/0302094"
},
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