Hump Features Research Articles

Sharp-line and broad-continuum radiation from electrons channeled in diamond

Measured energy spectra of photons emitted at 0° by a 54 MeV electron beam channeled along the most open planar directions of a 20 μm thick diamond single crystal show unusually sharp lines which are identified as transitions between discrete states of transverse energy of the channeled electrons. Comparison with the spectrum obtained for random incidence reveals each channeling spectrum to exhibit a broad hump feature which is attributed to the radiative transitions of dechanneled electrons ending in bound and unbound states.

VW Hydri: Photo-Electric Observations during the 1977 May Supermaximum

SummaryPhoto-electric observations of VW Hydri during the 1977 May supermaximum are presented in the context of an observational model in which supermaxima are triggered by a normal outburst. Two new hump features are identified. A possible explanation of the various superhump types is suggested.