# 27Al(a,p)30Si excitation function, Run A, QQQ3 and SX3. Same inputs as ../../scratch/xs_27Al_lowE_2026-10-15.
#
#   ~/myenv/bin/python -B extract_yields.py       examples/27Al_ap_runA.toml   # 1. ROOT -> out/27Al_ap_runA/yields_<det>.csv
#   ~/myenv/bin/python -B geometric_efficiency.py examples/27Al_ap_runA.toml   # 2. detectors.py -> eps_<det>.csv
#   ~/myenv/bin/python -B cross_section.py        examples/27Al_ap_runA.toml   # 3. -> xs_<det>.csv, xs.png
#
# Each script reads the sections it needs. Paths are relative to this file's folder.
# "{det}" is replaced by each entry of `dets`.

title = "27Al(a,p)30Si, Run A"
mode = "excitation"                 # "excitation": sigma(E_cm);  "angular": dsigma/dOmega(theta_cm)
dets = ["sx3", "qqq"]               # names known to detectors.py
out_dir = "../out/27Al_ap"

# ------------------------------------------------------------- step 1: extract_yields.py
[extract]
# One fill per candidate: x = vertex z, y = tracked beam energy. Projected on y (all z, including overflow).
source = "hist"
file = "~/ANASEN_analysis/Output_27Al_X0_Y0/Output_27Al.root"
hist = "_m27Alax+misc_{det}/m27Alax_BeamEnergy_vs_VertexZ_{det}"
axis = "y"
variable = "e_beam"

# ------------------------------------------------------------- the reaction (steps 2 and 3)
[reaction]
beam_mass_u = 26.981538             # 27Al   (atomic masses, as TrackRecon.C)
target_mass_u = 4.002603254         # 4He
ejectile_mass_u = 1.007825032       # p      -> Q = 2.372 MeV for the ground state
recoil_mass_u = 29.973770           # 30Si
detect = "ejectile"
ecm_per_ebeam = 0.12918             # the rounded factor of the established analysis (the masses give 0.129182)
# 30Si states weighted by the TALYS (a,p) state cross sections at each bin's E_cm
states_csv = "../inputs/talys_27Al_ap.csv"
# or fixed weights:  states = [{ex_mev = 0.0, weight = 1.0}, {ex_mev = 2.235, weight = 0.5}]

[beam]
# Beam energy along z;
# the nominal E_cm of each bin and the beam energy in the efficiency toy come from the 0.962 track.
track_csv = "../inputs/beam_tracks.csv"
track_z_col = "z_mm"
track_e_col = "e_beam_mev_0962"
# Alternative: build the track from an energy-loss table (check which dE/dx scale the table was made with):
#   eloss_table = "../../eloss_calculations/aluminum_lookup_80MeV_250torr_3pc.dat"
#   e_entrance_mev = 56.16
#   z_entrance_mm = -454.0
n_beam = 1.4405e12                     # Faraday cup, ch5 ssec:beam_exposure: the 45 runs (2.2096e12)
# For another set of runs: ../../runlog/beam_exposure.py "<runs>" --data-dir ../../Output_27Al_fb
n_beam_rel_err = 0.5

[bins]
ecm_edges = { start = 0.0, stop = 7.25, step = 0.25 }

# ------------------------------------------------------------- step 2: geometric_efficiency.py
[efficiency]
n_per_bin = 400000
seed = 20261016

# ------------------------------------------------------------- step 3: cross_section.py
[target]
# 4He in 250 Torr He + 3% CO2 at 20 C  -> 7.988e17 He atoms per cm2 per mm
pressure_torr = 250.0
temperature_k = 293.15
mole_fraction = 0.97
atoms_per_molecule = 1

# [yield] csv = "..."               # only to read yields from somewhere other than <out_dir>/yields_<det>.csv

[acceptance]
source = "geometric"                # <out_dir>/eps_<det>.csv from step 2
column = "eps_geometric"            # or eps_si, eps_si_thr, eps_counter
# To use the adopted efficiency of ../../scratch/xs_27Al_lowE_2026-10-15 instead (includes gas loss and thresholds):
#   source = "csv"
#   csv = "../../scratch/xs_27Al_lowE_2026-10-15/out/xs_{det}.csv"
#   match = "bin"
#   x_col = "ecm_lo_mev"
#   eps_col = "eps_tube_adopted"
#   rel_err_col = "eps_tube_rel_err"

[[reference]]
csv = "../inputs/talys_27Al_ap.csv"
x_col = "ecm_mev"
y_col = "sigma_total_mb"
label = "TALYS (a,p), discrete states"

[plot]
yscale = "log"
xlim = [0, 7.4]
ylim = [1e-3, 3e4]