150 keV Emission from PKS 2149−306 withBEPPOSAX

keV Emission from PKS 2149 − 306 with BeppoSAX

A BeppoSAX observation of the z=2.34 quasar PKS2149−306 produced a strong signal in the high energy PDS instrument up to a maximum observed energy of nearly 50 keV, 150 keV in the quasar frame. The Beppo-SAX spectrum spans almost 3 decades (0.3−150 keV, quasar frame) and shows an extremely hard (α=0.4±0.05) X-ray spectrum above 3 keV (comparable to XJB the X-ray background slope), and either a ...

/ 00 06 22 5 v 2 2 4 Ju l 2 00 1 150 keV Emission from PKS 2149 − 306 with BeppoSAX

A BeppoSAX observation of the z=2.34 quasar PKS2149−306 produced a strong signal in the high energy PDS instrument up to a maximum observed energy of nearly 50 keV, 150 keV in the quasar frame. The Beppo-SAX spectrum spans almost 3 decades (0.3−150 keV, quasar frame) and shows an extremely hard (α=0.4±0.05) X-ray spectrum above 3 keV (comparable to XJB the X-ray background slope), and either a ...

Electron emission from carbon foils induced by keV ions

We have measured yields of electrons emitted in the forward and backward directions from ultrathin carbon foils due to 10–100 keV atomic and molecular projectiles. In general, electron yields are higher in the forward than in the backward direction. Their behavior with projectile type and energy can be explained by a competition of a forward peaked angular distribution of initial ionization eve...

Differential cross sections for ejection of electrons from rare gases by 7.5-150-keV protons.

Measurements of the neutron - proton and neutron - carbon total cross section from 150 to 800 keV