Americium-230

Properties and data of the isotope ²³⁰Am.

Contents

General data

Name of the isotope:Americium-230; Am-230Symbol:²³⁰Am or 23095AmMass number A:230 (= number of nucleons)Atomic number Z:95 (= number of protons)Neutrons N:135Isotopic mass:230.04609(14) u (atomic weight of Americium-230)Nuclide mass:229.9939821 u (calculated nuclear mass without electrons)Mass excess:42.93256 MeVMass defect:1.8670517 u (per nucleus)Nuclear binding energy:1739.14745624 MeV (per nucleus)
7.56151068 MeV (average binding energy per nucleon)Separation energy:S_N = 7.29(16) MeV (first neutron)
S_P = 1.75(14) MeV (first proton)Half-life:31 sDecay constant λ:0.022359586469676 s^-1Specific activity α:5.854459969144 × 10⁺¹⁹ Bq g^-1
1582286478.1472 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2003

Radioactive Decay

Half-life T_½ = 31 s respectively 3.1 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC	²³⁰Pu	ca. 100 %	6.00(13) MeV
SZ	^div	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 135) and isobaric (same nucleon number A = 230) with Americium-230. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 135	Isobar A = 230
80	²¹⁵Hg
81	²¹⁶Tl
82	²¹⁷Pb
83	²¹⁸Bi
84	²¹⁹Po
85	²²⁰At
86	²²¹Rn	²³⁰Rn
87	²²²Fr	²³⁰Fr
88	²²³Ra	²³⁰Ra
89	²²⁴Ac	²³⁰Ac
90	²²⁵Th	²³⁰Th
91	²²⁶Pa	²³⁰Pa
92	²²⁷U	²³⁰U
93	²²⁸Np	²³⁰Np
94	²²⁹Pu	²³⁰Pu
95	²³⁰Am	²³⁰Am