# photoreactions

Fortran module: `photoreactions`

## Parameters

User-configurable parameters (can be set via `param_dict`):

| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `ice_gas_photo_crosssection_ratio` | `<class 'numpy.ndarray'>` | `0.30000001192092896` |  |
| `lambda_grid` | `float64[(30,)]` | `array(30,)` |  |
| `nco_grid` | `float64[(8,)]` | `array(8,)` |  |
| `nh2_grid` | `float64[(6,)]` | `array(6,)` |  |
| `num_lambda` | `<class 'numpy.ndarray'>` | `30` |  |
| `sco_deriv` | `float64[(8, 6)]` | `array(8, 6)` |  |
| `sco_grid` | `float64[(8, 6)]` | `array(8, 6)` |  |
| `start` | `<class 'numpy.ndarray'>` | `1` |  |
| `startr` | `<class 'numpy.ndarray'>` | `1` |  |
| `uv_fac` | `<class 'numpy.ndarray'>` | `3.0199999809265137` |  |
| `xlambda_deriv` | `float64[(30,)]` | `array(30,)` |  |
| `xlambda_grid` | `float64[(30,)]` | `array(30,)` |  |

## Constants (Read-Only)

Fortran PARAMETER constants (compile-time values):

| Constant | Type | Value |
|----------|------|-------|
| `dimco` | `<class 'numpy.ndarray'>` | `7` |
| `dimh2` | `<class 'numpy.ndarray'>` | `6` |
| `dp` | `<class 'numpy.ndarray'>` | `8` |

## Runtime Access

Access `photoreactions` parameters at runtime using `uclchem.advanced.GeneralSettings()`.
See [Accessing Fortran Parameters](index.html#accessing-fortran-parameters-at-runtime) on the main Fortran API page for examples.