| 摘要 |
A molecular beam detector for a molecular beam tube frequency standard using a barium oxide molecule of the form Ba138O16 having spinless atoms and using electrostatic state selection, which detector comprises a heated elongated member stretched along the axis of the beam tube and arranged to intercept beam particles over a focal region extending along the length of the said member. Ions are formed in the vicinity of the elongated member and are collected by electrode means maintained negative with respect to said member.
|
