Authors: M Della Corte
Publish Date: 2007/12/13
Volume: 4, Issue: 6, Pages: 1565-1569
Abstract
Si descrive un appareochio per l’analisi fotometrica delle tracce in emulsioni nucleari L’apparecchio particolarmente adatto al rilievo del profilo fotometrico trasversale è di costruzione piuttosto semplice e permette di operare con precisione del 2–3 pur mantenendo una velocità di lavoro di circa 500 Μm di traccia per oraA simple apparatus for the photometric analysis of the tracks in nuclear emulsions is described The optically magnified image of a portion of a track is formed on the plane of a slit and parallel to it after having been reflected by an alluminated movable mirror This mirror is fastened to the moving coil of a dc instrument suitably modified to respond to 50/100 Hz ac When ac is supplied to the coil the image is accordingly displaced sinusoidally in the direction normal to the slit The variable luminous flux through the slit modulates the output current of a IP21 Photomultipiier This current is duly amplified and displayed on they axis of a cathode ray oscillograph whose xaxis is swept by an ac of the same frequency and suitable phase The photometric prophile thus appears on the screen without appreciable deformation The total magnification is about 20 to 30 thousand times The working speed is 500Μm of track every hour the precision of the width measurements is about 2/3
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