dorsal/arxiv
View SchemaVariational calculation of antiprotonic helium atoms
| Authors | O. I. Kartavtsev |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9512030 |
| URL | https://arxiv.org/abs/nucl-th/9512030 |
| Journal | Phys.Atom.Nucl.59:1483-1491,1996; Yad.Fiz.59N9:1541-1550,1996 |
Abstract
A few per cent fraction of antiprotons stopped in helium survives for an enormous time (up to tens of microseconds) in comparison with the usual lifetime ($10^{-12}s$) of these particles in matter. The explanation is that antiprotons are captured in the metastable antiprotonic helium atoms $^{3,4}\! H\! e\bar pe$ carrying an extremely large total angular momentum $L\sim 30-40$. Initial populations, level lifetimes and very precise values of the transition energies were obtained in experiments on the resonant laser--induced annihilation. Analogous long-lived systems were observed in experiments with negative kaons and pions. The purpose of this report is to present the results of calculation of eigenenergies, radiative transition rates, energy-level splitting due to relativistic interactions and Auger decay rates of antiprotonic helium atoms within the variational approach.
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"abstract": "A few per cent fraction of antiprotons stopped in helium survives for an\nenormous time (up to tens of microseconds) in comparison with the usual\nlifetime ($10^{-12}s$) of these particles in matter. The explanation is that\nantiprotons are captured in the metastable antiprotonic helium atoms $^{3,4}\\!\nH\\! e\\bar pe$ carrying an extremely large total angular momentum $L\\sim 30-40$.\nInitial populations, level lifetimes and very precise values of the transition\nenergies were obtained in experiments on the resonant laser--induced\nannihilation. Analogous long-lived systems were observed in experiments with\nnegative kaons and pions.\n The purpose of this report is to present the results of calculation of\neigenenergies, radiative transition rates, energy-level splitting due to\nrelativistic interactions and Auger decay rates of antiprotonic helium atoms\nwithin the variational approach.",
"arxiv_id": "nucl-th/9512030",
"authors": [
"O. I. Kartavtsev"
],
"categories": [
"nucl-th",
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],
"journal_ref": "Phys.Atom.Nucl.59:1483-1491,1996; Yad.Fiz.59N9:1541-1550,1996",
"title": "Variational calculation of antiprotonic helium atoms",
"url": "https://arxiv.org/abs/nucl-th/9512030"
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