ABOUT US
JOURNALS
ANNUAL SUBSCRIPTION
OUR TEAM
Join Us

Bulletin of Pure and Applied Sciences- Physics (Started in 1982)
eISSN: 2320-3218
pISSN: 0970-6569
Impact Factor: 6.987 (2018)
DOI: 10.5958/2320-3218
Editor-in-Chief:  Prof. Madan jee,
About Journal More Archive Visit IndianJournals.com
Current Issue
Archive
Guide for Authors
Journal's Ethics & Policies
Editorial Board
Reviewer Board
Indexing
UGC Protocol Part 1
 
Article Details

Bulletin of Pure and Applied Sciences- Physics (Started in 1982)
Year : 2018, Volume & Issue : Volume-37D, Issue-2 (July-December)
Page No. : 163-166, Article Type : Original Aticle
Article DOI : 10.5958/2320-3218.2018.00022.2 (Received on 27.06.2018 Accepted on 15.11.2018)

Photoionization Spectroscopy of Lithium, Sodium and Potassium Nanoparticles in a Beam for the Metallic Work Function

Amita Sharma*
Author’s Affiliation : Department of Physics, R.D.S. College, Muzaffapur, Bihar 842001, India.

Corresponding Author : Amita Sharma, Department of Physics, R.D.S. College, Muzaffapur, Bihar 842001, India. ,
E-Mail:-[email protected]


Abstract

We have used a modified particle source with a temperature controlled nozzle to measure the temperature dependence of the work function for Lithium, Sodium and Potassium. The temperature dependence of the work function arises from thermal expansion of the metal which resulted in a decrease of the electron density and a concomitant change of the Fermi energy. We have shown that photoionisation spectroscopy of Lithium, Sodium and Potassium nanoparticles in a beam provide high accuracy data for the metallic work function and its temperature dependence. The influence of temperature on the photoionization spectra of smaller clusters where thermal expansion has been predicted to have a stronger effect than in bulk and of particles composed of materials which exhibit measurable changes in the work function and photoyield at the melting point.

Keywords

Work function, electron density, thermal expansion, Fermi energy, nanoparticles, cluster, photoionization.
Download Now
 

All rights reserved. Website Designed and Maintained by LASERWEBMAKER.COM

Publisher Ethics & Policies    |Downloads    |    Article Submission   |    Payment    |    Contact Us