SOME CONSTANTS‘ AND CON VERSION FACTORS
_
W .
:
Velocityof1ight....-...........................
c
MW
Electron,charge.........................….….
&
=4.803
X10“103b5.e.s.u.
Electron charge/màss..........................
e/mo
=
=
.
*
r
.
Electronrestmass..…......................….{mo
=5.485 X18“âïäaîÊunit.
_
=
8.12
X 1 “
arg.
'
{moc2 : 5_107 >< 105e.v.
—
Electrônvolt.……….…...........…..........
1e.v.
=1.591
><.10—12erg.
,
.
_
=
1.161
X 104 deg. (abs.).
=
1.074
X 10’9 mass unit.
.
‘
'
=
1.768
X 10“33 gram.
_’
.
-
W—__———————
Hydrogenatom,mass.….....................…
MH
'
=
1.662
Hydrogen atom mass/electron mass...…......….
ME,/mo= 1.839
>< 103
Proton, charge/mass…..........................
e/MP : 9.580
X 103 abs. e.m.u./g.
_
_
_
lf'
M
2
=
1.494
X 10“3 erg.
Proton,se energy....…………..…..........….
po
=9.388
X108e.v.
unit (atomic weight = 1.0000)
.
.
.
.
.
.
.
..
M1
=
1.646
X 10—24 gran].
-
M
't
1fe
!'
M62
=
9.316
X1086.V.
_
assum_,se
negy
1
=1.482
X10“3erg.
'A1phaparticle,charge..................…..... Ea
=
9.56
>< 10—19e.s.u…
.
Alpha_parcle,charge/mass..….………..........
Ea/Ma= 4.823
>< 10îäb5. e.m.u./g,_ ,..
Alphapartîcle,mass......................'...…{Ma
:gggg îË_ä2p
gram.
_
.
_
.
2
=
5.930
X 10“3 erg.
_Alphapartlcle,selfenergy.............._...…... {Mac =_3_727 X 109e.v.
Alpha particle (number from 1millicurie)..…….…
Q
=
3.71
_
X 107/sec.
'
=
9.6494
>< 104 int. cou1./ .equiv.
Faraday..………………….........._...…....….{F
=9.6489
X1-04abs,coulîg.equiv.
.
GasConstant...….............................
Ro
=8.3136
‘X107_erg./deg./molè.
Avogadro’snumberl...........................
No
=6.022
XlO”/mole.
Loschmidt’snumber...…….……..'-.............
"0
=
2.705
X 1019/cm3.
'
Boltzmann’sconstan't...............;..…....…
k
=
1.371
>< 10"1erg/deg.
Planck’sconstant.…..........................
h
'
_
'
Planck’s çonstant/electroncharge.........‘;.._.… -h/e____
=
1.37
X'10f17 erg.sec./e.s.u.
_
Radiätedwave-length.................….....… )\V
=
1.234
X104angstrom-volts
_
_
'
Parücle’swave—Ieqgth..….......'...............
MV
=
1.507 . >< 102Êngstrom2«volts.
‘
_
,
'
'
.'
.=
2.41—
X 107
cm.
'
Com_pt0_nwave—length..….…..............…...{It/mc =24__17 ._ X.U.
_
_
———————.———_—___—°Î—.
See _R. T. Birge, Rev. Mod. Phys. l, 1 (1929); Phys.
40, 228 (1932);
(1935); 52.
241 (1937) and Nature, 137, 187,(1936).
"
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_
E.S.U.
_
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