material.h

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// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2026, Liam Pohlmann
 
#ifndef HUMMINGBIRD_PHYSICS_MATERIAL_H_
#define HUMMINGBIRD_PHYSICS_MATERIAL_H_
 
namespace hummingbird {
 
/**
 * @brief Defines a monoenergetic, constant-properties material
 *
 */
struct Material {
  /// @brief Total macroscopic cross section in 1/cm
  double total_xs;
 
  /// @brief Isotropic scattering macroscopic cross section in 1/cm
  double scattering_xs;
 
  /// @brief Fission macroscopic cross section in 1/cm
  double fission_xs;
 
  /// @brief Average number of neutrons produced per fission event
  double nu;
};
 
}  // namespace hummingbird
 
#endif  // HUMMINGBIRD_PHYSICS_MATERIAL_H_