Direction of -rays Produced by Polarised X-rays

Are "Progressive" Mutations Produced by X-Rays?

PAGE 495 1. The physical background of the problem. .................................... 11. Evidence concerning the duality of the X-ray effect on chro 111. A partial separation of the Werent genetic effects of X-rays.. . . . . . . . . . . IV. The production of multiple allelomorphs.. ..... ........................... 507 V. An induced mutation visibly d8erent from a known lass of VI. First at...

Cosmic Rays produced by CDM-related mechanisms

We briefly review current theoretical and experimental status of Ultra-High Energy Cosmic Rays. We show that “top-down” mechanisms of UHE CR which involve heavy relic particle-like objects predict Galactic anisotropy of highest energy cosmic rays at the level of minimum ∼ 20%. This anisotropy is large enough to be either observed or ruled out in the next generation of experiments. This talk is ...

Chemical Analysis by X-Rays

Subject headings: galaxies: general—galaxies: spiral—X-rays: general—X-rays: galaxies—X-rays: ISM

We present results from the analysis of deep ROSAT HRI and PSPC observations of the spiral galaxy M81. The inferred total (0.5–2 keV band) luminosity of M81 is ∼ 3×10 ergs s, excluding the contribution from identified interlopers found within the D25 ellipse. The nucleus of the galaxy alone accounts for about 65% of this luminosity. The rest is due to 26 other X-ray sources (contributing ∼ 10%)...

Mev X rays and photoneutrons from femtosecond laser-produced plasmas.

We demonstrate a novel method to monitor the total angular distribution of the spectrum of hard x-ray emission from a plasma generated with femtosecond laser pulses with an intensity of 5 x 10(18) W/cm2 on a solid target. Measured and calculated angular distributions of x rays show a pronounced anisotropy for MeV photon energies. We complemented the spectral information by demonstrating a (gamm...