Atomic and nuclear properties of alanine (C₃H₇NO₂)

Quantity	Value	Units	Value	Units
<Z/A>	0.53976
Specific gravity	1.420	g cm-3
Mean excitation energy	71.9	eV
Minimum ionization	1.924	MeV g-1cm2	2.732	MeV cm-1
Nuclear collision length	58.4	g cm-2	41.16	cm
Nuclear interaction length	83.5	g cm-2	58.82	cm
Pion collision length	85.9	g cm-2	60.49	cm
Pion interaction length	115.5	g cm-2	81.34	cm
Radiation length	39.44	g cm-2	27.77	cm
Critical energy	82.81	MeV (for e-)	80.59	MeV (for e+)
Molière radius	10.10	g cm-2	7.111	cm
Plasma energy ℏωp	25.23	eV
Muon critical energy	1076.	GeV

Composition:

Elem	Z	Atomic frac*	Mass frac
H	1	7.00	0.079190
C	6	3.00	0.404439
N	7	1.00	0.157213
O	8	2.00	0.359159
* calculated from mass fraction data

For muons, dE/dx = a(E) + b(E) E. Tables of b(E): PDF TEXT
Table of muon dE/dx and Range: PDF TEXT
Explanation of some entries