Development of novel method for measuring the work function using the hollow-cathode lamp and its application for physics experiment

2015 Fiscal Year Final Research Report

• Project/Area Number: 25350235
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Science education
• Research Institution: Saitama University
• Principal Investigator: OHMUKAI Ryuzo 埼玉大学, 教育学部, 准教授 (40359089)
• Co-Investigator(Kenkyū-buntansha): KONDO Hitoshi 埼玉大学, 教育学部, 教授 (40178421)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 光電効果 / 仕事関数 / ホロカソードランプ / セシウム

Outline of Final Research Achievements

We proposed a novel idea of detecting the photoelectric effect using a hollow-cathode lamp and demonstrated its experiment. Based on our idea, we cold actually detect the photoelectric signal and its properties and determined the threshold wavelength of caesium atoms. As a result, the threshold wavelength from our experiments was approximately 690 nm which is 40 nm larger than that from the previous result. This is due to the impurities like Pb which is contained in the cathode of the lamp. Our research is the first demonstration of measuring the metallic threshold wavelength using a hollow-cathode lamp. This is the basic stage for the application of our experimental scheme for the physics teaching aid in high schools and universities.

Free Research Field

物理教育