Improved apparatus for trapped radical and other studies down to 1.5 K.
This note describes a Dewar system and associated apparatus for trapped free radical and other studies at temperatures down to 1.5 K. Cylindrical and rectangular microwave cavities can be used.
AN OPTICAL CELL FOR USE WITH LIQUID HELIUM
A low temperature cell is described that permits spectral absorption and emission measurements, as well as high energy irradiation of materials held at liquid helium temperatures. The liquid helium capacity of one liter is sufficient for up to 24 hours of continuous operation. Any substance whether it be solid, liquid, or gas at room temperatures can be studied. The all‐metal cell is entirely portable and can be employed with a number of instruments without modification. A sylphon bellows arrangement permits vertical displacement within the cell of the samples under study.
Measurements on thermo-electric forces of some alloys at temperatures from 2.5 TO 17.5 °K
Summary Thermo-electric forces against a silveralloy-normal were measured down to the temperatures from 2.5 to 17.5°K for an alloy of Ag with Au and for Au with small quantities of Fe, Co, Ni, Mn or Cr respectively.