Abstract
A cosmic-ray mass spectrometer utilizing a superconducting magnet, digitized wire spark chambers, and time-of-flight scintillation counters has examined the mass spectrum of low-momentum charged particles at 2750-m altitude (747 g/cm/sup 2/). For the first time at mountain altitude, the deuteron spectrum has been clearly resolved. The proton results confirm earlier work. The data indicate the presence of a few /sup 4/He nuclei. Upper limits are given to fluxes of antiproton and hypothetical massive particles in the 5-to-10-GeV/c/sup 2/ range. The low-momentum deuteron spectrum, as well as the proton spectra at various atmospheric depths, can be well understood in terms of a cosmic-ray atmospheric cascade calculation. The deuterons are principally produced by N+N..-->..d+..pi.. and quasielastic nucleon scattering on n-p pairs within the nucleus. Calculations are also presented of the expected intensities of low-momentum antiprotons and hypothetical massive particles at mountain altitude.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
