Americium-231

Properties and data of the isotope ²³¹Am.

Content

General data

Name of the isotope:Americium-231; Am-231Symbol:²³¹Am or 23195AmMass number A:231 (= number of nucleons)Atomic number Z:95 (= number of protons)Neutrons N:136Mass defect:232.921806616 u (per nucleus)Nuclear binding energy:216965.26533196 MeV (per nucleus)
939.24357287 MeV (average binding energy per nucleon)Half-life:- ungelistet -Spin and parity:
(nuclear angular momentum)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 136) and isobaric (same nucleon number A = 231) with Americium-231. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 136	Isobar A = 231
80	²¹⁶Hg
81	²¹⁷Tl
82	²¹⁸Pb
83	²¹⁹Bi
84	²²⁰Po
85	²²¹At
86	²²²Rn
87	²²³Fr	²³¹Fr
88	²²⁴Ra	²³¹Ra
89	²²⁵Ac	²³¹Ac
90	²²⁶Th	²³¹Th
91	²²⁷Pa	²³¹Pa
92	²²⁸U	²³¹U
93	²²⁹Np	²³¹Np
94	²³⁰Pu	²³¹Pu
95	²³¹Am	²³¹Am
96	²³²Cm
97	²³³Bk