Highly polarized muonic He produced by collisions with laser optically pumped Rb

Journal Article · Mon Feb 08 00:00:00 EST 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.70.758· OSTI ID:7175821

Barton, A S; Bogorad, P; Cates, G D; Mabuchi, H; Middleton, H; Newbury, N R ^[1]; Holmes, R; McCracken, J; Souder, P A; Xu, J ^[2]; Tupa, D ^[3]

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1. Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)
2. Department of Physics, Syracuse University, Syracuse, New York 13244 (United States)
3. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

We have formed highly polarized muonic helium by stopping unpolarized negative muons in a mixture of unpolarized gaseous He and laser polarized Rb vapor. The stopped muons form muonic He ions which are neutralized and polarized by collisions with Rb. Average polarizations for [sup 3]He and [sup 4]He of (26.8[plus minus]2.3)% and (44.2[plus minus]3.5)% were achieved, representing a tenfold increase over previous methods. Relevant cross sections were determined from the time evolution of the polarization. Highly polarized muonic He is valuable for measurements of the induced pseudoscalar coupling [ital g][sub [ital p]] in nuclear muon capture.

• DOE Contract Number: FG02-90ER40557; FG02-84ER40146
• OSTI ID: 7175821
• Journal Information: Physical Review Letters; (United States), Vol. 70:6; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HELIUM
PRODUCTION
SPIN ORIENTATION
MUONIC ATOMS
MUONS MINUS
SLOWING-DOWN
ACCELERATOR FACILITIES
ASYMMETRY
ATOM-ATOM COLLISIONS
CROSS SECTIONS
ELECTRONS
EXPERIMENTAL DATA
GASES
HELIUM 3
HELIUM 4
LAMPF LINAC
LASERS
MIXTURES
OPTICAL PUMPING
RUBIDIUM
STOPPING POWER
TIME DEPENDENCE
ACCELERATORS
ALKALI METALS
ATOM COLLISIONS
ATOMS
COLLISIONS
DATA
DISPERSIONS
ELEMENTARY PARTICLES
ELEMENTS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
FLUIDS
HELIUM ISOTOPES
INFORMATION
ISOTOPES
LEPTONS
LIGHT NUCLEI
LINEAR ACCELERATORS
MESON FACTORIES
METALS
MUONS
NONMETALS
NUCLEI
NUMERICAL DATA
ORIENTATION
PUMPING
RARE GASES
STABLE ISOTOPES
664500* - Special Atoms & Molecules- (1992-)