An Analysis for X-ray Flare on July 14, 1980 and Its Comparison with the Hα Flare

An investigation for the flare on July 14, 1980, is presented by using the Hα patrol observational data in A. R. obtained at Yunnan Observatory and X-ray data from SMM. Our comprehensive analyses for the flare contain the following items: determining its position at Ha; making a positional comparison at Hα and X-ray wavelengths; getting the energy spectra of X-ray bursts; determining the change of spectral index with time; calculating the total number of accelerating high energy electrons during its eruption and approaching the radiative mechanism of soft and hard X-ray bursts. The results show that: (17 the hard X-ray burst is produced by high energy non-thermal electrons accelerated in the current sheet; (2) the soft X-ray burst is produced by hot bremss-trahlung rediation of high-temperature plasma in the flare at first, then hot bremss-trahlung radiation is gradually replaced by bremsstrahlung one of non-thermal electrons; (3) when the comparison of positions between Hα and X-ray images is used to estimate the. altitude of the X-ray burst source, the flare model and the configuration of magnetic field must be considered. They all support Emerging Magnetic Flux mo-del^[8] (EMFmodel) of flare process.