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ATLAS is a multi-purpose particle physics detector at CERN's Large Hadron Collider where two pulsed beams of protons are brought to collision at very high energy. There are collisions every 25 ns, corresponding to a rate of 40 MHz. A three-level trigger system reduces this rate to about 200 Hz while keeping bunch crossings which potentially contain interesting processes. The Level-1 trigger, implemented...
The ATLAS detector at CERN's LHC will be exposed to proton-proton collisions at a bunch-crossing rate of 40 MHz. In order to reduce the data rate, a three-level trigger system selects potentially interesting physics processes. The first trigger level is implemented in electronics and firmware. It aims at reducing the output rate to less than 100 kHz. The central trigger processor (CTP) combines information...
E0-enhanced spectra of conversion electrons taken after (α,α ) and (α,2n) reactions and after projectile Coulomb excitation improve our knowledge about first and second excited bands in 238 U and 240 Pu built on O +2 and O +3 states which lie anomalously close together. The two bands are of different structure.
Neutron decay of excited hole states populated by the 90 Zr( 3 He,α) reaction at an incident energy of 102 MeV has been investigated. The α-particles were analysed in a magnetic spectrograph positioned at 1.4° and detected with a multi-wire drift chamber. Excitation energies in 89 Zr up to 26 MeV were studied. An array of neutron detectors was positioned around...
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