Characteristics of the Spectra of Protons and Alpha Particles in Recurrent
نویسنده
چکیده
The spectra of both protons and alpha particles (1 ~ E ~ 7 MeV/nucleon) during 31 recurrent particle streams are fit well by an exponential in particle rigidity. Although the spectra show considerable temporal variation, the proton and alpha particle spectra are correlated such that the e-folding rigidities P0 (a) and P0 (p) of the two spectra are in the ratio P0 (a)/ P0 (p) = 1.5 ± 0.1. The consistency of this ratio may be a characteristic of the interplanetary acceleration process.
منابع مشابه
Characteristics of the Spectra of Protons and Alpha Particles in Recurrent Events at 1 Au
The spectra of both protons and alph'a pa•-ticles (1 <• E • 7 MeV/nucleon) during 31 recurrent particle streams are fit well by an exponential in particle rigidity. Although the spectra show considerable temporal variation, the proton and alpha particle spectra are correlated such that the e-folding rigidities Po(•) and Po(P) of the two spectra are in the ratio Po(•)/ Po(P) = 1.5 ñ 0.1. The con...
متن کاملProton beam dosimetry by CR-39 track-etched detector
Background: High and intermediate energy protons are not able to form a track in a solid state nuclear track detector (SSNTD) directly. However, such tracks can be formed through secondary particles created during primary radiation nuclear reactions in a SSNTD. Materials and Methods: The protons with primary energies of 9.6 and 30 MeV available at the cyclotron accelerator with corresponding lo...
متن کاملDesign and calibration of a passive detector for separating neutron, proton and alpha particles in mixed radiation fields
In this study, calibration process was carried out for deigned new CR-39 nuclear track detector for protons, neutrons and alpha particles separately under the same etching condition. In order to aim this purpose, americium-beryllium standard source (241Am-Be) and Plexiglas phantom for neutron irradiation, brass collimators and americium standard source (241Am) for alpha irradiation and the acce...
متن کاملCompare charged and uncharged particles leakage of plasma focus for medical radioisotopes production
In this study, to calculate the radioactivity of radioisotopes such as 11C, 15O, 18F and 123,124I in a focus plasma device for the production of medical radioisotopes, the particles of neutrons and protons with cubic targets of Nitrogen, Xenon, Carbon and a solid natural Boron is used. Particles energy are at the input of the program from 1MeV to 10MeV. Also, the total yield coefficient is cons...
متن کاملDose distribution of protons and flux of secondary particles in breast proton therapy.
Introduction: Proton therapy is newer therapeutic method for early stage breast cancer. Proton beams release most of their energy in the Bragg peak and then will be a rapid decline in their end. When protons interact with matter, produce secondary particles like neutrons and gammas, and these unwanted radiation has no beneficial effect and also is believed to increase the risk ...
متن کامل