200 resultados para Transmitting telescope


Relevância:

20.00% 20.00%

Publicador:

Resumo:

2 scans sharing same hs #, one with suffix 1of2 for full stereograph, 2of2 for crop to right side image only

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Richard Bull, architect. Known at various times as Detroit Observatory, Campus Observatory, Old Observatory. Stereoscopic photograph showing the 1868 director's residence addition. James C. Watson (wearing top hat) is seen with a telescope on a tripod; his wife, Annette, is standing at the porch. (Source: A Creation of His Own: Tappan's Detroit Observatory by Patricia S. Whitesell) On verso: Views at University of Michigan, Ann Arbor

Relevância:

10.00% 10.00%

Publicador:

Resumo:

The measurement of 28O-Mev neutron cross sections of various nuclei is described. The neutron beam used results from 340-Mev protons in the 184-in. cyclotron striking a 2-in. Be target. The neutron detector consists of a double coincidence anthracene scintillation counter telescope which counts recoil protons scattered at 15 deg from a paraffin cylinder placed in the collimated neutron beam. A 2-in. Cu absorber placed between the counters assures that only protons of energy greater than 250 Mev are counted. The cross sections for all nuclei measured from Li to Pb are smaller than the corresponding cross sections measured at 90 Mev by factors between 0.5 and 0.6.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Includes index.