Brachytherapy source specifications

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Discussion Overview

The discussion revolves around the use of MCNPX for calculating the deposited energy around a cobalt source in brachytherapy applications. Participants are addressing issues related to input parameters and error messages encountered during simulations.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant reports an error message stating "all entries must be integers" when using NPS=3E+9 in MCNPX.
  • Another participant inquires about the version of MCNPX being used, noting that version 2.5.0 and later supports 64-bit operation with a maximum of 2E18 particles.
  • A participant confirms they are using version 2.7 of MCNPX on a Windows 7 64-bit system.
  • There is a suggestion that the error may not occur at the start of the run but rather during the simulation process.

Areas of Agreement / Disagreement

Participants have not reached a consensus on the cause of the error or the appropriate settings for optimal results, indicating ongoing uncertainty and multiple perspectives on the issue.

Contextual Notes

Limitations include potential misunderstandings of input parameters, the specific requirements of different MCNPX versions, and the implications of using non-integer values for certain inputs.

saidhorion
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hi every body i use MCNPX with a Z600 with 20Go of ram and 16 core to calculate the dep energy arrownd a source of cobalt with the tally F6, but when i put NPS=3E+9 an erreur apears that '' all entries must be integers''. i want help because NPS=2E+9 dosn't give a satisfaying results?
 
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Hi,
i have the version: 2.7 of MCNPX, win7 64-bit.
 
So I suppose you don't have a fatal error on the beginning of the run but in progress ?
 

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