Muon transfer from hydrogen to argon and helium at 10--15 bars

Journal Article · Thu Dec 15 04:00:00 EST 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.38.6151· OSTI ID:6609357

Jacot-Guillarmod, R; Bienz, F; Boschung, M; Piller, C; Schaller, L A; Schellenberg, L; Schneuwly, H; Reichart, W; Torelli, G

The transfer of negative muons from the ground state of muonic hydrogen to argon and helium has been measured in gaseous mixtures at pressures between 10 and 15 bars and at different relative concentrations. The transfer rate to argon, reduced to liquid-hydrogen density (..lambda..sub p//sub Ar/ = 1.42(4) x 10/sup 11/ s/sup -1/), agrees well with those obtained at ten times higher pressures. The transfer rate to helium (..lambda..sub p//sub He/ = 0.88(9) x 10/sup 8/ s/sup -1/), measured in a triple gas mixture, disagrees with the only other experimental value and is about two times higher than recent theoretical predictions. In addition, the muonic x-ray intensities of the Lyman series of argon resulting from muon transfer have been determined. They are well reproduced by a cascade calculation assuming a theoretical initial distribution over n and l states.

• Research Organization: Institut de Physique de l'Universite, CH-1700 Fribourg, Switzerland
• OSTI ID: 6609357
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 38:12; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640303* -- Atomic
Molecular & Chemical Physics-- Positronium
Muonium
& Muonic & Mesic Atoms & Molecules
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CHARGE EXCHANGE
COLLISIONS
CROSS SECTIONS
ELEMENTS
FLUIDS
GASES
HELIUM
HYDROGEN
LOW PRESSURE
LYMAN LINES
MESIC MOLECULES
MOLECULE COLLISIONS
MOLECULES
MUON-CATALYZED FUSION
MUONIC MOLECULES
NONMETALS
NUCLEAR REACTIONS
NUCLEOSYNTHESIS
RARE GASES
SYNTHESIS
THERMONUCLEAR REACTIONS