Standardization, decay data measurements and evaluation of 64Cu.

Area of Science:

• Nuclear physics
• Radiochemistry
• Metrology

Background:

• Accurate activity standards are crucial for nuclear measurements.
• Copper-64 (64Cu) is a radioisotope with applications in medicine and research.
• Existing decay data for 64Cu requires refinement for improved accuracy.

Purpose of the Study:

• To establish national activity standards for 64Cu.
• To facilitate the definition of an international key comparison reference value for 64Cu.
• To determine precise decay data, including photon emission intensities and half-life, to enhance the 64Cu decay scheme.

Main Methods:

• Four laboratories collaborated to measure the activity of a 64Cu solution.
• Results were compared using the International Reference System (IRS).
• New measurements of photon emission intensities and half-life were performed.

Main Results:

• National activity standards for 64Cu were successfully created.
• The study provided a basis for an international key comparison reference value.
• New, precise decay data for 64Cu was determined.
• A revised decay scheme for 64Cu was derived by integrating new and existing data.

Conclusions:

• The study successfully established 64Cu activity standards and improved decay data.
• The findings support international metrology efforts for 64Cu.
• The enhanced decay scheme provides a more accurate representation of 64Cu nuclear properties.