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The 40Ar(d,p)41Ar cross section between 3-7 MeV
D L Bleuel1, S G Anderson1, L A Bernstein2
1Lawrence Livermore National Laboratory, Nuclear and Chemical Sciences Division, Livermore, California 94550, USA.
This study measured the argon-40 (d,p) argon-41 cross section to assess argon as a deuteron beam stopping material. Results indicate a higher cross section than previously reported, impacting safety assessments.
Area of Science:
- Nuclear physics
- Materials science
Background:
- Argon is a potential material for stopping deuteron beams in accelerators.
- Accurate cross-section data is crucial for safety evaluations and beam control.
Purpose of the Study:
- To measure the 40Ar(d,p)41Ar cross section at specific deuteron energies.
- To evaluate the safety and feasibility of using argon as a deuteron beam stopping material.
Main Methods:
- Activation method using a 16-MeV deuteron beam from a cyclotron.
- Deuteron energy degradation using nickel foils and an aluminum gas chamber.
- Measurement of 41Ar activation using a high-purity germanium detector.
Main Results:
- Cross sections for the 40Ar(d,p)41Ar reaction were determined at 3.6, 5.5, and 7.0 MeV.
- Measured cross sections were approximately 40% larger than a prior experimental value.
Conclusions:
- The measured cross-section data provides critical information for the safe use of argon.
- Higher cross-section values necessitate a re-evaluation of argon's suitability as a beam stopping material.
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