Getting the elastic scattering length by observing inelastic collisions in ultracold metastable helium atoms

Autor: S. Seidelin, O. Sirjean, Alain Aspect, J. Viana Gomes, Christoph I Westbrook, Denis Boiron, R. Hoppeler

Publikováno v: Physical Review Letters
Physical Review Letters, American Physical Society, 2004, 93, pp.090409

We report an experiment measuring simultaneously the temperature and the flux of ions produced by a cloud of triplet metastable helium atoms at the Bose-Einstein critical temperature. The onset of condensation is revealed by a sharp increase of the i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::03e4694b77b9507a0f994af4fefe6a09
https://hal.archives-ouvertes.fr/hal-00001027v2/document

Using ion production to monitor the birth and death of a metastable helium Bose Einstein condensate

Autor: Denis Boiron, O. Sirjean, J. Viana Gomes, Christoph I Westbrook, S. Seidelin, Alain Aspect

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP

We d i s cuss observations of the ion flux from a cloud of trapped 23S1metastable helium atoms. Both Bose–Einstein condensates (BEC) andthermal clouds were investigated. The ion flux is compared withtime-of-flight observations of the expanded cloud

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08497bbc76aa9ab30495eb9486e27e38
https://hdl.handle.net/1822/58951

Thermalization of magnetically trapped metastable helium

Autor: A. Robert, Alain Aspect, Denis Boiron, S. Nowak, O. Sirjean, Christoph I Westbrook, J. Poupard, Antoine Browaeys

Publikováno v: Physical Review A
Physical Review A, American Physical Society, 2001, 64, pp.034703. ⟨10.1103/PhysRevA.64.034703⟩

We have observed thermalization by elastic collisions of magnetically trapped metastable helium atoms. Our method directly samples the reconstruction of a thermal energy distribution after the application of an RF knife. The relaxation time of our sa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c01b42b4bc7f2a85f4746ff335a3c273
https://hal.archives-ouvertes.fr/hal-00575972

Bose-Einstein condensation of metastable helium: some experimental aspects

Autor: O. Sirjean, Denis Boiron, Alain Aspect, Christoph I Westbrook, A. Robert, Antoine Browaeys

Publikováno v: Laser Spectroscopy XV international Conference
Laser Spectroscopy XV international Conference, 2001, Snowbird (Utah), United States. pp.12

We describe our recent realization of BEC using metastable helium. All detection is done with a micruchannel plate which detects the metastables or ions coming from the trapped atom cloud. This discussion emphasizes some of the diagnostic experiments

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac9c0b6c1d9e8bce2d74f4d4aad6844a
https://hal.archives-ouvertes.fr/hal-00012891

Condensation d'He métastable

Autor: S. Seidelin, O. Sirjean, Alain Aspect, A. Robert, Denis Boiron, J. Poupard, Antoine Browaeys, Christoph I Westbrook

Publikováno v: Journal de Physique IV (Proceedings). 12:135-136

Un condensat de Bose-Einstein de l'helium dans un etat metastable a ete realise. Cet etat a une energie interne de 20 electron-volts par rapport a l'etat fondamental, ce qui peut conduire a des collisions inelastiques qui detruirait le condensat. Cep

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0d28233083d8cb6e56bbea317a3ff9c7
https://doi.org/10.1051/jp4:20020108