Generation and Trapping of Charged Species in Rare-Gas Matrix at 4°K: esr spectra of ${\mathrm{Cd}}^{+}$, ${\mathrm{Cr}}^{+}$, and ${\mathrm{Mn}}^{+}$

Photoirradiation of a rare-gas matrix at 4°K containing both electron donating species and electron accepting species of suitable choice may lead to generation and trapping of charged species effectively isolated within the matrix lattice. Preliminary investigation conducted along this line using certain metal atoms (Cd, Cr, Mn, and Na) as electron donors and HI as an acceptor led to successful observation of the electron spin resonance spectra of ${\mathrm{Cd}}^{+}$, ${\mathrm{Cr}}^{+}$, and ${\mathrm{Mn}}^{+}$.