Direct positron annihilation and positronium formation in thermal plasmas
Journal Article
·
· Astrophysical Journal; (USA)
- California Univ., La Jolla (USA)
In the present evaluation of the rate of direct positron annihilation with electrons in the nonrelativistic limit, general analytic expressions are given for the radiative recombination of positrons to form positronium. Formulae are derived for the radiative capture to bound states of atomic hydrogen, and the connection between the two problems is demonstrated. Annihilation from excited states of positronium is considered, and it is estimated that 90 percent of the annihilations occur from the ground 1s state for both ortho and para positronium following radiative capture and cascade. A convenient form is given for the photodissociation cross section of positronium. 15 refs.
- OSTI ID:
- 5356248
- Journal Information:
- Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 344; ISSN ASJOA; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Photomagnetic positron annihilation effects
Determination and applications of enhancement factors for positron and ortho-positronium annihilations
Calculation of density matrices in the formation of positronium
Conference
·
Sun Dec 31 23:00:00 EST 1978
· Adv. Chem. Ser.; (United States)
·
OSTI ID:6790629
Determination and applications of enhancement factors for positron and ortho-positronium annihilations
Journal Article
·
Wed Dec 14 23:00:00 EST 2005
· Physical Review. A
·
OSTI ID:20786306
Calculation of density matrices in the formation of positronium
Journal Article
·
Thu Apr 15 00:00:00 EDT 2010
· Physical Review. A
·
OSTI ID:21408592
Related Subjects
640100* -- Astrophysics & Cosmology
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
ASTRONOMY
ASTROPHYSICS
BASIC INTERACTIONS
BORN APPROXIMATION
CAPTURE
CHEMISTRY
COSMOCHEMISTRY
DISSOCIATION
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
GAMMA ASTRONOMY
HOT PLASMA
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
PARTICLE INTERACTIONS
PERTURBATION THEORY
PLASMA
POSITRONIUM
POSITRONS
RECOMBINATION
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
ASTRONOMY
ASTROPHYSICS
BASIC INTERACTIONS
BORN APPROXIMATION
CAPTURE
CHEMISTRY
COSMOCHEMISTRY
DISSOCIATION
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
GAMMA ASTRONOMY
HOT PLASMA
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
PARTICLE INTERACTIONS
PERTURBATION THEORY
PLASMA
POSITRONIUM
POSITRONS
RECOMBINATION