How is Alpha Particle Energy Defined in MCNP6?

Thread starter physadict
Start date Jan 24, 2024
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Alpha particle Energy Mcnp6

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SUMMARY

The discussion focuses on defining alpha particle energy in MCNP6, specifically using the parameters for materials and source definitions. Key parameters include material definitions such as $MAT1 and $MAT2, with respective densities and energy values. The discussion emphasizes the importance of the 'imp:a' and 'phys:a' commands for particle importance and physics settings, as well as the 'sdef' command for source definition, which specifies position, direction, and energy of the alpha particles. A warning is noted regarding the 'ext' parameter, indicating it is typically a variable in most problems.

PREREQUISITES

Familiarity with MCNP6 simulation software
Understanding of particle transport theory
Knowledge of material properties and definitions in MCNP6
Basic grasp of source definition parameters in Monte Carlo simulations

NEXT STEPS

Explore MCNP6 documentation on material definitions and their parameters
Learn about the 'sdef' command in MCNP6 for defining particle sources
Investigate the implications of the 'imp:a' command for particle importance sampling
Study the effects of varying the 'ext' parameter in MCNP6 simulations

USEFUL FOR

Researchers, nuclear engineers, and physicists involved in radiation transport simulations, particularly those utilizing MCNP6 for modeling alpha particle interactions and energy definitions.

Jan 24, 2024

physadict

TL;DR: Hello everyone here,

I do need your help in this matter, please kindly help me solve this problem. I am new to this forum and now am seeking for help.

I'm new to MCNP code, and I ran the MCNP6 code with particle alpha mode a and 'phys:a'. Where the default energy is 100 MeV. if I want to use more than 250 MeV energy, How do I arrange it?
How to determine the maximum energy in mcnp6?

thanks

15- mode a
16- m1 1000. -0.111894 $MAT1
17- 8000. -0.888106
18- m2 6000. -0.000124 $MAT2
19- 7000. -0.755268 8000. -0.231781 18000. -0.012827
20- imp:a 1 3r 0 $ 1, 5
21- phys:a 250
22- sdef pos 5 0 0 axs=1 0 0 ext=-8 rad=d1 par=34 erg=250 vec=1 0 0 dir=1
warning. ext is constant. in most problems it is a variable.
23- si1 1 5
24- sp1 -21 1
25- f6:a 3 2
26- nps 1000