CONSTRUCTION AND CALIBRATION OF A CONDENSATION NUCLEUS COUNTER FOR THE MEASUREMENT OF AITKEN PARTICLES IN THE HARMATTAN HAZE

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dc.contributor.authorIBRAHIM, SHEHU MUSTAPHA
dc.date.accessioned2014-02-11T11:23:51Z
dc.date.available2014-02-11T11:23:51Z
dc.date.issued1989-02-27
dc.descriptionSubmitted to the Postgraduate School, Ahnadu Bello University, Zaria, in Partial Fulfilment of the Requirements for 'the Degree of MASTER OF SCIENCE (NUCLEAR PHYSICS) DEPARTMENT OF PHYSICS AHMADU BELLO UNIVERSITY, ZARIAen_US
dc.description.abstractOne type of atmospheric condensation nucleus i s the Aitken p a r t i c l e which has r a d i i ranging between 0.005 and 0.1 microns. In t h i s work, a locally constructed condensation nucleus counter s u i t a b l e for the measurement of the concentration of Aitken nuclei in the Harmattan haze is described. F i l t e r e d a i r is drawn into the previously evacuated . system to a pressure of about 2 x 104 Pa and then released. The concentration of the Aitken nuclei in the air drawn into the apparatus is deduced from the reading of the photocurrents Io and I through the pressurized and rarefied a ir in the system respectively. Measurements of p a r t i c l e s in ambient air with the counter show that the concentration of Aitken nuclei in the l o c a l i t y is up to 3 x 1011 p a r t i c l es per l i t r e.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/1200
dc.language.isoenen_US
dc.subjectCONDENSATION NUCLEUS,en_US
dc.subjectCOUNTER,en_US
dc.subjectMEASUREMENT,en_US
dc.subjectAITKEN PARTICLES,en_US
dc.subjectHARMATTAN HAZEen_US
dc.titleCONSTRUCTION AND CALIBRATION OF A CONDENSATION NUCLEUS COUNTER FOR THE MEASUREMENT OF AITKEN PARTICLES IN THE HARMATTAN HAZEen_US
dc.typeThesisen_US
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