- List
- NSG – Nuclear-related dual-use equipment, materials, software and related technology (Part 2) – INFCIRC/254/Rev.13/Part 2
N.B.: Mass spectrometers especially designed or prepared for analysing on-line samples of uranium hexafluoride (UF₆) are controlled under INFCIRC/254/Part 1 (as amended).
a. Inductively coupled plasma mass spectrometers (ICP/MS);
b. Glow discharge mass spectrometers (GDMS);
c. Thermal ionisation mass spectrometers (TIMS);
d. Electron bombardment mass spectrometers having both of the following features:
1. A molecular beam inlet system that injects a collimated beam of analyte molecules into a region of the ion source where the molecules are ionised by an electron beam; and
2. One or more cold traps that can be cooled to a temperature of 193 K (-80 °C) or less in order to trap analyte molecules that are not ionised by the electron beam;
e. Mass spectrometers equipped with a microfluorination ion source designed for actinides or actinide fluorides.
Technical Notes: 1. Item 3.B.6.d. describes mass spectrometers that are typically used for isotopic analysis of UF₆ gas samples.
2. Electron bombardment mass spectrometers in Item 3.B.6.d. are also known as electron impact mass spectrometers or electron ionisation mass spectrometers.
3. In Item 3.B.6.d.2., a ‘cold trap’ is a device that traps gas molecules by condensing or freezing them on cold surfaces. For the purposes of this entry, a closed-loop gaseous helium cryogenic vacuum pump is not a cold trap.
a. Inductively coupled plasma mass spectrometers (ICP/MS);
b. Glow discharge mass spectrometers (GDMS);
c. Thermal ionisation mass spectrometers (TIMS);
d. Electron bombardment mass spectrometers having both of the following features:
1. A molecular beam inlet system that injects a collimated beam of analyte molecules into a region of the ion source where the molecules are ionised by an electron beam; and
2. One or more cold traps that can be cooled to a temperature of 193 K (-80 °C) or less in order to trap analyte molecules that are not ionised by the electron beam;
e. Mass spectrometers equipped with a microfluorination ion source designed for actinides or actinide fluorides.
Technical Notes: 1. Item 3.B.6.d. describes mass spectrometers that are typically used for isotopic analysis of UF₆ gas samples.
2. Electron bombardment mass spectrometers in Item 3.B.6.d. are also known as electron impact mass spectrometers or electron ionisation mass spectrometers.
3. In Item 3.B.6.d.2., a ‘cold trap’ is a device that traps gas molecules by condensing or freezing them on cold surfaces. For the purposes of this entry, a closed-loop gaseous helium cryogenic vacuum pump is not a cold trap.