Californium-252 Neutron Source from China
Californium-252 metal sources encapsulated for neutron radiography, well logging, and PGNAA analysis, featuring high neutron emission rate from spontaneous fission. HTS 2844.43.00 covers this transplutonium element (atomic no. 98) compound.
Duty Rate — China → United States
37.5%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.91.0125%Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Import Tips
• Report neutron emission rate (typically 2.3×10⁶ n/s-μg) and half-life (2.645 years)
• Include americium-252 impurity levels (<2%) in isotopic analysis
• Criticality safety index must not exceed 10 for most packages