Loading...
Please wait, while we are loading the content...
Similar Documents
Positron-emitter production in solar flares from 3He reactions, Astrophys (2004)
| Content Provider | CiteSeerX |
|---|---|
| Author | Kozlovsky, Benzion Murphy, R. J. Share, G. H. |
| Abstract | We treat in detail positron production from the decay of radioactive nuclei produced in nuclear reactions of accelerated 3He. Because of their large cross sections and low threshold energies, these reactions can significantly contribute to positron production in solar flares with accelerated-particle compositions enriched in 3He. The addition of these 3He reactions extends earlier calculations of positron production by accelerated protons and -particles. 3He reactions not only add significantly to the total positron yield in flares, but can also yield a positron depth distribution that peaks higher in the solar atmosphere. We discuss the impact these reactions have on the analysis of the annihilation line observed with RHESSI from the 2002 July 23 flare. A significant contribution from 3He reactions expands the utility of the annihilation line as a sensitive tool for investigating the structure of the flaring solar atmosphere. Subject headings: acceleration of particles — nuclear reactions, nucleosynthesis, abundances — Sun: flares — Sun: X-rays, gamma rays 1. |
| File Format | |
| Language | English |
| Publisher Date | 2004-01-01 |
| Access Restriction | Open |
| Subject Keyword | Solar Flare Positron-emitter Production Annihilation Line Particle Nuclear Reaction Accelerated Proton Positron Depth Distribution Total Positron Yield Low Threshold Energy Sensitive Tool Subject Heading Accelerated-particle Composition Nuclear Reaction Positron Production Detail Positron Production Flaring Solar Gamma Ray Radioactive Nucleus Abundance Sun Large Cross Section Significant Contribution Flare Sun |
| Content Type | Text |
| Resource Type | Article |
