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Developing 152Eu into a standard for detector efficiency calibration.

Ruy M Castro¹, Vito R Vanin, Paulo R Pascholati

¹Laboratorio do Acelerador Linear, Instituto de Fisica, Universidade de Sao Paulo, Rua do Matao, travessa R 187, Sao Paulo, SP 05404-900, Brazil.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine

|February 28, 2004

Summary

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This study refined the 152Eu 13-year decay scheme using gamma-gamma coincidence measurements. Four new 152Sm levels were identified, enhancing our understanding of nuclear structure and radioactive decay.

Area of Science:

Nuclear Physics
Atomic and Molecular Physics
Nuclear and Chemical, Radiation Physics

Background:

The 152Eu 13-year decay scheme is crucial for understanding nuclear structure.
Accurate placement of gamma-ray transitions is essential for refining decay schemes.

Purpose of the Study:

To verify the 152Eu 13-year decay scheme.
To precisely place gamma-ray transitions within the decay scheme.
To identify new energy levels in 152Sm.

Main Methods:

A gamma-gamma coincidence experiment was conducted.
The multi-detector array for residual activity measurement at the Linear Accelerator Laboratory was utilized.
Approximately 10^9 coincidence events were recorded from a 1 MBq 152Eu source.

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Main Results:

About 30 gamma-ray transitions were successfully placed in the decay scheme.
Four new energy levels were identified in 152Sm.
The previously known set of levels fed in the 152Eu decay was expanded.

Conclusions:

The experiment successfully refined the 152Eu 13-year decay scheme.
The findings contribute to a more comprehensive understanding of nuclear structure in this mass region.
The addition of new levels provides valuable data for nuclear spectroscopy.