Class: Radiation::Resource::Nucleideorg

Inherits:
Base
  • Object
show all
Defined in:
lib/radiation/resource/nucleideorg.rb

Instance Attribute Summary

Attributes inherited from Base

#data

Instance Method Summary collapse

Methods inherited from Base

#initialize

Constructor Details

This class inherits a constructor from Radiation::Resource::Base

Instance Method Details

#fetch(nuclide) ⇒ Object 



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# File 'lib/radiation/resource/nucleideorg.rb', line 11

def fetch(nuclide)
	@nuclide = nuclide
	@nuclide = "Ra-226D" if @nuclide == "Ra-226" #Ra-226 in equilibrium with daughters
	begin
		@data[:nuclide] = @nuclide.to_s

		@data[:reference] = "A. Pluquet et al. (2013). Recommended data for #{@nuclide} by the Decay Data Evaluation Project working group. Decay Data Evaluation Project, Laboratoire National Henri Becquerel, C.E. Saclay. Retrieved from http://www.nucleide.org/DDEP_WG/Nuclides/#{@nuclide}.lara.txt"

		OpenURI::Cache.cache_path = "#{Dir.tmpdir}/radiation/"
		uri = open("http://www.nucleide.org/DDEP_WG/Nuclides/#{@nuclide}.lara.txt").readlines
		start = 0
		uri.each_with_index do |line, lineno|
			if line.start_with?("Half-life (s)")
				row = line.split(' ; ')
				@data[:halflife] = row[1].to_f.pm(row[2].to_f)
			end
			if line.start_with?("------")
				start = lineno + 2
				break
			end
		end
		return @data[:transitions] = [] if start == 0 or uri.count < start
		@data[:transitions] = uri[start...-1].collect{|line| line.split(' ; ')}.select!{|row| row[4] == "g"}.collect do |row|
		 {:energy => row[0].to_f.pm(row[1].to_f), :intensity => row[2].to_f.pm(row[3].to_f)} 
		end
	rescue
		raise "No Data for #{@nuclide}"
	end
	self
end