Discovery of Cesium, Lanthanum, Praseodymium and Promethium Isotopes

TL;DR

This paper reviews the discovery history of isotopes of cesium, lanthanum, praseodymium, and promethium, detailing the methods used for their identification and the number of isotopes observed for each element.

Contribution

It provides a comprehensive overview of the first discovery publications and identification methods for these four elements' isotopes.

Findings

41 cesium isotopes observed

35 lanthanum isotopes observed

32 praseodymium isotopes observed

Abstract

Currently, forty-one cesium, thirty-five lanthanum, thirty-two praseodymium, and thirty-one promethium, isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.