| Geant4 Cross Reference |
1 // -*- C++ -*- 1
2 // -------------------------------------------
3 // HEP coherent system of Units
4 //
5 // This file has been provided to CLHEP by Gea
6 //
7 // The basic units are :
8 // millimeter (millimeter)
9 // nanosecond (nanosecond)
10 // Mega electron Volt (MeV)
11 // positron charge (eplus)
12 // degree Kelvin (kelvin)
13 // the amount of substance (mole)
14 // luminous intensity (candela)
15 // radian (radian)
16 // steradian (steradian)
17 //
18 // Below is a non exhaustive list of derived a
19 // (i.e. mostly the SI units).
20 // You can add your own units.
21 //
22 // The SI numerical value of the positron char
23 // as it is needed for conversion factor : pos
24 //
25 // The others physical constants are defined i
26 // PhysicalConstants.h
27 //
28 // Authors: M.Maire, S.Giani
29 //
30 // History:
31 //
32 // 06.02.96 Created.
33 // 28.03.96 Added miscellaneous constants.
34 // 05.12.97 E.Tcherniaev: Redefined pascal (
35 // 20.05.98 names: meter, second, gram, radi
36 // (from Brian.Lasiuk@yale.edu (STA
37 // 05.08.98 angstrom, picobarn, microsecond,
38 // 01.03.01 parsec
39 // 31.01.06 kilogray, milligray, microgray
40 // 29.04.08 use PDG 2006 value of e_SI
41 // 03.11.08 use PDG 2008 value of e_SI
42 // 19.08.15 added liter and its sub units (m
43 // 12.01.16 added symbols for microsecond (u
44 // 17.07.20 use PDG 2019 value of e_SI
45 // 06.05.21 added minute, hour, day, year an
46
47 #ifndef HEP_SYSTEM_OF_UNITS_H
48 #define HEP_SYSTEM_OF_UNITS_H
49
50 namespace CLHEP {
51
52 //
53 //
54 //
55 static constexpr double pi = 3.14159265
56 static constexpr double twopi = 2*pi;
57 static constexpr double halfpi = pi/2;
58 static constexpr double pi2 = pi*pi;
59
60 //
61 // Length [L]
62 //
63 static constexpr double millimeter = 1.;
64 static constexpr double millimeter2 = millim
65 static constexpr double millimeter3 = millim
66
67 static constexpr double centimeter = 10.*mi
68 static constexpr double centimeter2 = centim
69 static constexpr double centimeter3 = centim
70
71 static constexpr double meter = 1000.*milli
72 static constexpr double meter2 = meter*meter
73 static constexpr double meter3 = meter*meter
74
75 static constexpr double kilometer = 1000.*me
76 static constexpr double kilometer2 = kilomet
77 static constexpr double kilometer3 = kilomet
78
79 static constexpr double parsec = 3.085677580
80
81 static constexpr double micrometer = 1.e-6 *
82 static constexpr double nanometer = 1.e-9 *
83 static constexpr double angstrom = 1.e-10*
84 static constexpr double fermi = 1.e-15*
85
86 static constexpr double barn = 1.e-28*m
87 static constexpr double millibarn = 1.e-3 *b
88 static constexpr double microbarn = 1.e-6 *b
89 static constexpr double nanobarn = 1.e-9 *b
90 static constexpr double picobarn = 1.e-12*b
91
92 // symbols
93 static constexpr double nm = nanometer;
94 static constexpr double um = micrometer;
95
96 static constexpr double mm = millimeter;
97 static constexpr double mm2 = millimeter2;
98 static constexpr double mm3 = millimeter3;
99
100 static constexpr double cm = centimeter;
101 static constexpr double cm2 = centimeter2;
102 static constexpr double cm3 = centimeter3;
103
104 static constexpr double liter = 1.e+3*cm3;
105 static constexpr double L = liter;
106 static constexpr double dL = 1.e-1*liter;
107 static constexpr double cL = 1.e-2*liter;
108 static constexpr double mL = 1.e-3*liter;
109
110 static constexpr double m = meter;
111 static constexpr double m2 = meter2;
112 static constexpr double m3 = meter3;
113
114 static constexpr double km = kilometer;
115 static constexpr double km2 = kilometer2;
116 static constexpr double km3 = kilometer3;
117
118 static constexpr double pc = parsec;
119
120 //
121 // Angle
122 //
123 static constexpr double radian = 1.;
124 static constexpr double milliradian = 1.e-3*
125 static constexpr double degree = (pi/180.0)*
126
127 static constexpr double steradian = 1.;
128
129 // symbols
130 static constexpr double rad = radian;
131 static constexpr double mrad = milliradian;
132 static constexpr double sr = steradian;
133 static constexpr double deg = degree;
134
135 //
136 // Time [T]
137 //
138 static constexpr double nanosecond = 1.;
139 static constexpr double second = 1.e+9
140 static constexpr double millisecond = 1.e-3
141 static constexpr double microsecond = 1.e-6
142 static constexpr double picosecond = 1.e-12
143
144 static constexpr double minute = 60*second;
145 static constexpr double hour = 60*minute;
146 static constexpr double day = 24*hour;
147 static constexpr double year = 365*day;
148
149 static constexpr double hertz = 1./second;
150 static constexpr double kilohertz = 1.e+3*he
151 static constexpr double megahertz = 1.e+6*he
152
153 // symbols
154 static constexpr double ns = nanosecond;
155 static constexpr double s = second;
156 static constexpr double ms = millisecond;
157 static constexpr double us = microsecond;
158 static constexpr double ps = picosecond;
159
160 //
161 // Electric charge [Q]
162 //
163 static constexpr double eplus = 1. ;// posit
164 static constexpr double e_SI = 1.602176634e
165 static constexpr double coulomb = eplus/e_SI
166
167 //
168 // Energy [E]
169 //
170 static constexpr double megaelectronvolt = 1
171 static constexpr double electronvolt = 1
172 static constexpr double kiloelectronvolt = 1
173 static constexpr double gigaelectronvolt = 1
174 static constexpr double teraelectronvolt = 1
175 static constexpr double petaelectronvolt = 1
176 static constexpr double millielectronvolt =
177
178 static constexpr double joule = electronvolt
179
180 // symbols
181 static constexpr double MeV = megaelectronvo
182 static constexpr double eV = electronvolt;
183 static constexpr double keV = kiloelectronvo
184 static constexpr double GeV = gigaelectronvo
185 static constexpr double TeV = teraelectronvo
186 static constexpr double PeV = petaelectronvo
187
188 //
189 // Mass [E][T^2][L^-2]
190 //
191 static constexpr double kilogram = joule*se
192 static constexpr double gram = 1.e-3*ki
193 static constexpr double milligram = 1.e-3*gr
194
195 // symbols
196 static constexpr double kg = kilogram;
197 static constexpr double g = gram;
198 static constexpr double mg = milligram;
199
200 //
201 // Power [E][T^-1]
202 //
203 static constexpr double watt = joule/second;
204
205 //
206 // Force [E][L^-1]
207 //
208 static constexpr double newton = joule/meter
209
210 //
211 // Pressure [E][L^-3]
212 //
213 #define pascal hep_pascal
214 static constexpr double hep_pascal = newton/
215 static constexpr double bar = 100000*
216 static constexpr double atmosphere = 101325*
217
218 //
219 // Electric current [Q][T^-1]
220 //
221 static constexpr double ampere = coulom
222 static constexpr double milliampere = 1.e-3*
223 static constexpr double microampere = 1.e-6*
224 static constexpr double nanoampere = 1.e-9*
225
226 //
227 // Electric potential [E][Q^-1]
228 //
229 static constexpr double megavolt = megaelect
230 static constexpr double kilovolt = 1.e-3*meg
231 static constexpr double volt = 1.e-6*meg
232
233 //
234 // Electric resistance [E][T][Q^-2]
235 //
236 static constexpr double ohm = volt/ampere;//
237
238 //
239 // Electric capacitance [Q^2][E^-1]
240 //
241 static constexpr double farad = coulomb/volt
242 static constexpr double millifarad = 1.e-3*f
243 static constexpr double microfarad = 1.e-6*f
244 static constexpr double nanofarad = 1.e-9*f
245 static constexpr double picofarad = 1.e-12*
246
247 //
248 // Magnetic Flux [T][E][Q^-1]
249 //
250 static constexpr double weber = volt*second;
251
252 //
253 // Magnetic Field [T][E][Q^-1][L^-2]
254 //
255 static constexpr double tesla = volt*sec
256
257 static constexpr double gauss = 1.e-4*te
258 static constexpr double kilogauss = 1.e-1*te
259
260 //
261 // Inductance [T^2][E][Q^-2]
262 //
263 static constexpr double henry = weber/ampere
264
265 //
266 // Temperature
267 //
268 static constexpr double kelvin = 1.;
269
270 //
271 // Amount of substance
272 //
273 static constexpr double mole = 1.;
274
275 //
276 // Activity [T^-1]
277 //
278 static constexpr double becquerel = 1./secon
279 static constexpr double curie = 3.7e+10 * be
280 static constexpr double kilobecquerel = 1.e+
281 static constexpr double megabecquerel = 1.e+
282 static constexpr double gigabecquerel = 1.e+
283 static constexpr double millicurie = 1.e-3*c
284 static constexpr double microcurie = 1.e-6*c
285 static constexpr double Bq = becquerel;
286 static constexpr double kBq = kilobecquerel;
287 static constexpr double MBq = megabecquerel;
288 static constexpr double GBq = gigabecquerel;
289 static constexpr double Ci = curie;
290 static constexpr double mCi = millicurie;
291 static constexpr double uCi = microcurie;
292
293 //
294 // Absorbed dose [L^2][T^-2]
295 //
296 static constexpr double gray = joule/ki
297 static constexpr double kilogray = 1.e+3*gr
298 static constexpr double milligray = 1.e-3*gr
299 static constexpr double microgray = 1.e-6*gr
300
301 //
302 // Luminous intensity [I]
303 //
304 static constexpr double candela = 1.;
305
306 //
307 // Luminous flux [I]
308 //
309 static constexpr double lumen = candela*ster
310
311 //
312 // Illuminance [I][L^-2]
313 //
314 static constexpr double lux = lumen/meter2;
315
316 //
317 // Miscellaneous
318 //
319 static constexpr double perCent = 0.01 ;
320 static constexpr double perThousand = 0.001;
321 static constexpr double perMillion = 0.0000
322
323 } // namespace CLHEP
324
325 #endif /* HEP_SYSTEM_OF_UNITS_H */
326