Formation of Antiprotonic Helium (p)over-barHe(+) and Ionization in Low-energy Collisions of (p)over-bar with He in the Ground 1 S-1 and Metastable 2 S-3 and 2 S-1 States

一博崎本, Kazuhiro Sakimoto

Published Apr 1, 2015• 0 citations

Related papers

Kazuhiro Sakimoto, 一博崎本

Apr 1, 20150 citations

Quenching of metastable antiprotonic helium atoms in collisions with deuterium molecules

Bertalan Juhász, J. A. Eades, R. Hayano +8 more

The European Physical Journal DMar 1, 20028 citations

Ionization and excitation into Rydberg states of fast metastable helium atoms in collisions with He, Ne, and N2

I.A. Kudriavtsev, V. V. Petrunin

Zhurnal Eksperimentalnoi i Teoreticheskoi FizikiJan 1, 19910 citations

Relativistic corrections on the energy levels of the metastable states of the antiprotonic helium atomcules

Yasushi Kino, M. Kamimura, Hiroshi Kudo +3 more

Oct 1, 19980 citations

Homonuclear ionizing collisions of laser-cooled metastable helium atoms (14 pages)

John M. McNamara, R. J. W. Stas

Physical Review AJan 1, 20060 citations

Formation of antiprotonic helium p¯He+ and ionization in low-energy collisions of p¯ with He in the ground 1S1 and metastable 2S3 and 2S1 states

Kazuhiro Sakimoto

Physical Review AApr 9, 20159 citations

Formation of Antiprotonic Helium (p)over-barHe(+) and Ionization in Low-energy Collisions of (p)over-bar with He in the Ground 1 S-1 and Metastable 2 S-3 and 2 S-1 States

一博崎本, Kazuhiro Sakimoto

Published Apr 1, 2015• 0 citations

OpenAlex

Related papers

Formation of Antiprotonic Helium (p)over-barHe(+) and Ionization in Low-energy Collisions of (p)over-bar with He in the Ground 1 S-1 and Metastable 2 S-3 and 2 S-1 States

Kazuhiro Sakimoto, 一博崎本

Apr 1, 20150 citations

Quenching of metastable antiprotonic helium atoms in collisions with deuterium molecules

Bertalan Juhász, J. A. Eades, R. Hayano +8 more

The European Physical Journal DMar 1, 20028 citations

Ionization and excitation into Rydberg states of fast metastable helium atoms in collisions with He, Ne, and N2

I.A. Kudriavtsev, V. V. Petrunin

Zhurnal Eksperimentalnoi i Teoreticheskoi FizikiJan 1, 19910 citations

Relativistic corrections on the energy levels of the metastable states of the antiprotonic helium atomcules

Yasushi Kino, M. Kamimura, Hiroshi Kudo +3 more

Oct 1, 19980 citations

Homonuclear ionizing collisions of laser-cooled metastable helium atoms (14 pages)

John M. McNamara, R. J. W. Stas

Physical Review AJan 1, 20060 citations

Formation of antiprotonic helium p¯He+ and ionization in low-energy collisions of p¯ with He in the ground 1S1 and metastable 2S3 and 2S1 states

Kazuhiro Sakimoto

Calculations of low-energy collisions of antiprotons $\overline{p}$ with helium atoms in the ground $(1\phantom{\rule{4pt}{0ex}}^{1}\mathit{S})$ and metastable $(2\phantom{\rule{4pt}{0ex}}^{3}\mathit{S}$ and $2\phantom{\rule{4pt}{0ex}}^{1}\mathit{S})$ states are carried out by using a semiclassical method and by further assuming that one of the two electrons is passive. Antiproton capture to form antiprotonic helium $(\ensuremath{\rightarrow}\overline{p}{\mathrm{He}}^{+}+e)$ and breakup ionization $(\ensuremath{\rightarrow}\overline{p}+{\mathrm{He}}^{+}+e)$ are investigated. The energy dependence of the capture and ionization cross sections and the distributions of the product states are presented and compared with previous theoretical calculations. For the metastable helium targets, most of the $\overline{p}{\mathrm{He}}^{+}$ atoms produced in the capture have long lifetimes against subsequent Auger decays and can be observed experimentally. For the ground-state targets, however, the formation of such long-lived states is rather a rare event at low collision energies.Calculations of low-energy collisions of antiprotons $\overline{p}$ with helium atoms in the ground $(1\phantom{\rule{4pt}{0ex}}^{1}\mathit{S})$ and metastable $(2\phantom{\rule{4pt}{0ex}}^{3}\mathit{S}$ and $2\phantom{\rule{4pt}{0ex}}^{1}\mathit{S})$ states are carried out by using a semiclassical method and by further assuming that one of the two electrons is passive. Antiproton capture to form antiprotonic helium $(\ensuremath{\rightarrow}\overline{p}{\mathrm{He}}^{+}+e)$ and breakup ionization $(\ensuremath{\rightarrow}\overline{p}+{\mathrm{He}}^{+}+e)$ are investigated. The energy dependence of the capture and ionization cross sections and the distributions of the product states are presented and compared with previous theoretical calculations. For the metastable helium targets, most of the $\overline{p}{\mathrm{He}}^{+}$ atoms produced in the capture have long lifetimes against subsequent Auger decays and can be observed experimentally. For the ground-state targets, however, the formation of such long-lived states is rather a rare event at low collision energies.

Physical Review AApr 9, 20159 citations

Calculations of low-energy collisions of antiprotons

\overline{p}

with helium atoms in the ground

(1\phantom{\rule{4pt}{0ex}}^{1}\mathit{S})

and metastable

(2\phantom{\rule{4pt}{0ex}}^{3}\mathit{S}

and

2\phantom{\rule{4pt}{0ex}}^{1}\mathit{S})

states are carried out by using a semiclassical method and by further assuming that one of the two electrons is passive. Antiproton capture to form antiprotonic helium $(\ensuremath{\rightarrow}\overline{p}{\mathrm{He}}^{+}+e)$ and breakup ionization $(\ensuremath{\rightarrow}\overline{p}+{\mathrm{He}}^{+}+e)$ are investigated. The energy dependence of the capture and ionization cross sections and the distributions of the product states are presented and compared with previous theoretical calculations. For the metastable helium targets, most of the

\overline{p}{\mathrm{He}}^{+}

atoms produced in the capture have long lifetimes against subsequent Auger decays and can be observed experimentally. For the ground-state targets, however, the formation of such long-lived states is rather a rare event at low collision energies.