Zobrazeno 1 - 10
of 679
pro vyhledávání: '"Cederquist, H"'
Autor:
Karls, J., Cederquist, H., Gibson, N. D., Grumer, J., Ji, M., Kardasch, I., Leimbach, D., Martini, P., Navarrete, J. E. Navarro, Poulose, R., Rosen, S., Schmidt, H. T., Simonsson, A., Zettergren, H., Hanstorp, D.
High-precision measurements of the electron affinities (EA) of the three stable isotopes of silicon, $^{28}$Si, $^{29}$Si and $^{30}$Si, have been performed at the cryogenic electrostatic ion-beam storage ring DESIREE. The quantum states of the ions
Externí odkaz:
http://arxiv.org/abs/2404.06226
Autor:
Anderson, E. K., Schmidt-May, A. F., Najeeb, P. K., Eklund, G., Chartkunchand, K. C., Rosén, S., Larson, Å., Hansen, K., Cederquist, H., Zettergren, H., Schmidt, H. T.
Publikováno v:
Phys. Rev. Lett. 124, 173001 (2020)
We report the first experimental evidence of spontaneous electron emission from a homonuclear dimer anion through direct measurements of $\rm{Ag}_2^- \rightarrow \rm{Ag}_2 + \rm{e}^-$ decays on milliseconds and seconds time scales. This observation i
Externí odkaz:
http://arxiv.org/abs/1911.09170
Autor:
Anderson, E. K., Kamińska, M., Chartkunchand, K. C., Eklund, G., Gatchell, M., Hansen, K., Zettergren, H., Cederquist, H., Schmidt, H. T.
Publikováno v:
Phys. Rev. A 98, 022705 (2018)
Spontaneous decays of small, hot silver cluster anions Ag$_{n}$, $n=4-7$ have been studied using one of the rings of the Double ElectroStatic Ion Ring ExpEriment (DESIREE). Observation of these decays over very long time scales is possible due to the
Externí odkaz:
http://arxiv.org/abs/1805.12437
Autor:
de Ruette, N., Wolf, M., Giacomozzi, L., Alexander, J. D., Gatchell, M., Stockett, M. H., Haag, N., Zettergren, H., Schmidt, H. T., Cederquist, H.
We give a detailed description of an electrospray ion source test bench and a single-pass setup for ion fragmentation studies at the DESIREE infrastructure at Stockholm University. This arrangement allows for collision induced dissociation experiment
Externí odkaz:
http://arxiv.org/abs/1805.05075
Autor:
de Ruette, N., Dochain, A., Launoy, T., Nascimento, R. F., Kaminska, M., Stockett, M. H., Vaeck, N., Schmidt, H. T., Cederquist, H., Urbain, X.
Publikováno v:
Phys. Rev. Lett. 121, 083401 (2018)
We have measured total absolute cross sections for the Mutual Neutralization (MN) of O- with O+/N+. A fine resolution (of about 50 meV) in the kinetic energy spectra of the product neutral atoms allows unique identification of the atomic states parti
Externí odkaz:
http://arxiv.org/abs/1804.08457
Publikováno v:
Carbon 139, 906 (2018)
We have measured the threshold center-of-mass kinetic energy for knocking out a single carbon atom from C$_{60}^-$ in collisions with He. Combining this experimental result with classical molecular dynamics simulations, we determine a semi-empirical
Externí odkaz:
http://arxiv.org/abs/1804.04374
Autor:
Hansen, K., Stockett, M. H., Kaminska, M., Nascimento, R. F., Anderson, E. K., Gatchell, M., Chartkunchand, K. C., Eklund, G., Zettergren, H., Schmidt, H. T., Cederquist, H.
Publikováno v:
Phys. Rev. A, 95, 022511 (2017)
We have measured the spontaneous neutral particle emission from copper cluster anions (Cu$_n^-$, $n=3-6$) stored at cryogenic temperatures in one of the electrostatic ion storage rings of the DESIREE (Double ElectroStatic Ion Ring ExpEriment) facilit
Externí odkaz:
http://arxiv.org/abs/1804.00590
Autor:
Chartkunchand, K. C., Kamińska, M., Anderson, E. K., Kristiansson, M. K., Eklund, G., Hole, O. M., Nascimento, R. F., Blom, M., Björkhage, M., Källberg, A., Löfgren, P., Reinhed, P., Rosén, S., Simonsson, A., Thomas, R. D., Mannervik, S., Davis, V. T., Neill, P. A., Thompson, J. S., Hanstorp, D., Zettergren, H., Cederquist, H., Schmidt, H. T.
Publikováno v:
Physical Review A 94, 032501 (2016)
The intrinsic radiative lifetimes of the $5d^{10}6s$ $^{2}\text{S}_{1/2}$ and $5d^{9}6s^{2}$ $^{2}\text{D}_{3/2}$ bound excited states in the platinum anion $\text{Pt}^{-}$ have been studied at cryogenic temperatures at the Double ElectroStatic Ion R
Externí odkaz:
http://arxiv.org/abs/1804.00231
Autor:
Schmidt, H. T., Thomas, R. D., Gatchell, M., Rosén, S., Reinhed, P., Löfgren, P., Brännholm, L., Blom, M., Björkhage, M., Bäckström, E., Alexander, J. D., Leontein, S., Hanstorp, D., Zettergren, H., Liljeby, L., Källberg, A., Simonsson, A., Hellberg, F., Mannervik, S., Larsson, M., Geppert, W. D., Rensfelt, K. G., Danared, H., Paál, A., Masuda, M., Halldén, P., Andler, G., Stockett, M. H., Chen, T., Källersjö, G., Weimer, J., Hansen, K., Hartman, H., Cederquist, H.
Publikováno v:
Rev. Sci. Instrum. 84, 055115 (2013)
We report on the first storage of ion beams in the Double ElectroStatic Ion Ring ExpEriment; DESIREE, at Stockholm University. We have produced beams of atomic carbon anions and small carbon anion molecules (C$_n^-$, $n=1,2,3,4$) in a sputter ion sou
Externí odkaz:
http://arxiv.org/abs/1804.00129
Autor:
Chartkunchand, K. C., Stockett, M. H., Anderson, E. K., Eklund, G., Kristiansson, M. K., Kamińska, M., de Ruette, N., Blom, M., Björkhage, M., Källberg, A., Löfgren, P., Reinhed, P., Rosén, S., Simonsson, A., Zettergren, H., Schmidt, H. T., Cederquist, H.
Publikováno v:
Review of Scientific Instruments 89, 033112 (2018)
A sputter ion source with a solid graphite target has been used to produce dianions with a focus on carbon cluster dianions, $\text{C}_{n}^{2-}$, with $n=7-24$. Singly and doubly charged anions from the source were accelerated together to kinetic ene
Externí odkaz:
http://arxiv.org/abs/1804.00233