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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2601.22360 |
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| _version_ | 1866917441657896960 |
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| author | Jones, B. J. P. Negi, A. Semakin, A. |
| author_facet | Jones, B. J. P. Negi, A. Semakin, A. |
| contents | Motivated by the needs of atomic tritium sources for neutrino mass experiments and Doppler-free two-photon 1S-2S spectroscopy in atomic deuterium and tritium, we present calculations of energy-dependent elastic scattering cross sections of hydrogen isotopes (H, D and T) on helium isotopes ($^3$He and $^4$He) in the temperature range 1~mK to 300~K. The tritium-on-helium cross sections are found to be enhanced over their hydrogen-on-helium counterparts by a near-threshold resonant \textit{s}-wave bound state at low energy, similar to one that has been predicted in the triplet T-T system. While the energy-dependent cross sections span a wide range at low energy due to this \textit{s}-wave enhancement, they tend toward a common value at high energy where the scattering becomes effectively geometric in nature. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_22360 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Low energy elastic scattering of hydrogen, deuterium and tritium on helium isotopes Jones, B. J. P. Negi, A. Semakin, A. Atomic Physics Nuclear Experiment Motivated by the needs of atomic tritium sources for neutrino mass experiments and Doppler-free two-photon 1S-2S spectroscopy in atomic deuterium and tritium, we present calculations of energy-dependent elastic scattering cross sections of hydrogen isotopes (H, D and T) on helium isotopes ($^3$He and $^4$He) in the temperature range 1~mK to 300~K. The tritium-on-helium cross sections are found to be enhanced over their hydrogen-on-helium counterparts by a near-threshold resonant \textit{s}-wave bound state at low energy, similar to one that has been predicted in the triplet T-T system. While the energy-dependent cross sections span a wide range at low energy due to this \textit{s}-wave enhancement, they tend toward a common value at high energy where the scattering becomes effectively geometric in nature. |
| title | Low energy elastic scattering of hydrogen, deuterium and tritium on helium isotopes |
| topic | Atomic Physics Nuclear Experiment |
| url | https://arxiv.org/abs/2601.22360 |