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Quantum tunnelling effects revealed in collisions of antiprotonic helium with hydrogenic molecules at low temperatures
Quenching of individual metastable states of antiprotonic helium (pHe /sup +/) in collisions with H/sub 2/ and D/sub 2/ in gas phase was studied using a laser-resonance method at CERN's antiproton decelerator. The temperature dependence of the quenching cross- sections of the pHe/sup +/ states...
| Autores principales: | , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2003
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/j.cplett.2003.08.041 http://cds.cern.ch/record/802321 |
| _version_ | 1780904764538617856 |
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| author | Juhász, Bertalan Eades, John Hayano, R S Hori, Masaki Horváth, D Ishikawa, T Torii, H A Widmann, E Yamaguchi, H Yamazaki, T |
| author_facet | Juhász, Bertalan Eades, John Hayano, R S Hori, Masaki Horváth, D Ishikawa, T Torii, H A Widmann, E Yamaguchi, H Yamazaki, T |
| author_sort | Juhász, Bertalan |
| collection | CERN |
| description | Quenching of individual metastable states of antiprotonic helium (pHe /sup +/) in collisions with H/sub 2/ and D/sub 2/ in gas phase was studied using a laser-resonance method at CERN's antiproton decelerator. The temperature dependence of the quenching cross- sections of the pHe/sup +/ states (n, l)=(37,34), (38,35), and (38,37) in the reactions pHe/sup +/sub (n, l)/+H/sub 2/ and pHe /sup +/sub (n, l)/+D/sub 2/ was investigated in the temperature range of 25-300 K. Significant quantum tunnelling effects were revealed at low temperatures and (n, l)-dependent reaction barriers were deduced, in good agreement with recent theoretical calculations. (24 refs). |
| id | cern-802321 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2003 |
| record_format | invenio |
| spelling | cern-8023212019-09-30T06:29:59Zdoi:10.1016/j.cplett.2003.08.041http://cds.cern.ch/record/802321engJuhász, BertalanEades, JohnHayano, R SHori, MasakiHorváth, DIshikawa, TTorii, H AWidmann, EYamaguchi, HYamazaki, TQuantum tunnelling effects revealed in collisions of antiprotonic helium with hydrogenic molecules at low temperaturesOther Fields of PhysicsQuenching of individual metastable states of antiprotonic helium (pHe /sup +/) in collisions with H/sub 2/ and D/sub 2/ in gas phase was studied using a laser-resonance method at CERN's antiproton decelerator. The temperature dependence of the quenching cross- sections of the pHe/sup +/ states (n, l)=(37,34), (38,35), and (38,37) in the reactions pHe/sup +/sub (n, l)/+H/sub 2/ and pHe /sup +/sub (n, l)/+D/sub 2/ was investigated in the temperature range of 25-300 K. Significant quantum tunnelling effects were revealed at low temperatures and (n, l)-dependent reaction barriers were deduced, in good agreement with recent theoretical calculations. (24 refs).oai:cds.cern.ch:8023212003 |
| spellingShingle | Other Fields of Physics Juhász, Bertalan Eades, John Hayano, R S Hori, Masaki Horváth, D Ishikawa, T Torii, H A Widmann, E Yamaguchi, H Yamazaki, T Quantum tunnelling effects revealed in collisions of antiprotonic helium with hydrogenic molecules at low temperatures |
| title | Quantum tunnelling effects revealed in collisions of antiprotonic helium with hydrogenic molecules at low temperatures |
| title_full | Quantum tunnelling effects revealed in collisions of antiprotonic helium with hydrogenic molecules at low temperatures |
| title_fullStr | Quantum tunnelling effects revealed in collisions of antiprotonic helium with hydrogenic molecules at low temperatures |
| title_full_unstemmed | Quantum tunnelling effects revealed in collisions of antiprotonic helium with hydrogenic molecules at low temperatures |
| title_short | Quantum tunnelling effects revealed in collisions of antiprotonic helium with hydrogenic molecules at low temperatures |
| title_sort | quantum tunnelling effects revealed in collisions of antiprotonic helium with hydrogenic molecules at low temperatures |
| topic | Other Fields of Physics |
| url | https://dx.doi.org/10.1016/j.cplett.2003.08.041 http://cds.cern.ch/record/802321 |
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