Cadmium-116

Properties and data of the isotope ¹¹⁶Cd.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: List of individual Cadmium isotopes (and general data sources).

General data

Name of the isotope:Cadmium-116; Cd-116Symbol:¹¹⁶Cd or 11648CdMass number A:116 (= number of nucleons)Atomic number Z:48 (= number of protons)Neutrons N:68Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.4166666666667 (= neutron-proton ratio)Neutron excess (N-Z):20Isotopic mass:115.904763(2) u (atomic weight of Cadmium-116)Nuclide mass:115.8784326 u (calculated nuclear mass without electrons)Mass excess:-88.71269 MeVMass defect:1.060052824 u (per nucleus)Nuclear binding energy:987.43284524 MeV (per nucleus)
8.51235211 MeV (average binding energy per nucleon)Separation energy:S_N = 8.6993(7) MeV (first neutron)
S_P = 11.019(18) MeV (first proton)Half-life:3.3(4) × 10¹⁹ aDecay constant λ:6.660470578693 × 10^-28 s^-1Specific activity α:3.487851479857 × 10^-6 Bq g^-1
9.426625621235 × 10^-17 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.6203(59) femtometer fmYear of discovery:1925

Radioactive Decay

Half-life T_½ = 3.3(4) × 10¹⁹ a respectively 1.040688 × 10²⁷ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
2 β^-	¹¹⁶Sn	?

Parent Nuclides

Direct parent isotopes are: ¹¹⁶In, ¹¹⁶Ag.

Occurrence

Comparison of the natural Cadmium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Cadmium Isotopic mixture	112.414 u	100 %
Isotope ¹⁰⁶Cd	105.906460(8) u	1.245(22) %	stable	0+
Isotope ¹⁰⁸Cd	107.904183(8) u	0.888(11) %	stable	0+
Isotope ¹¹⁰Cd	109.903007(4) u	12.470(61) %	stable	0+
Isotope ¹¹¹Cd	110.904183(4) u	12.795(12) %	stable	1/2+
Isotope ¹¹²Cd	111.902763(4) u	24.109(7) %	stable	0+
Isotope ¹¹³Cd	112.904408(3) u	12.227(7) %	8.04(5) × 10¹⁵ a	1/2+
Isotope ¹¹⁴Cd	113.903365(3) u	28.754(81) %	stable	0+
Isotope ¹¹⁶Cd	115.904763(2) u	7.512(54) %	3.3(4) × 10¹⁹ a	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 68) and isobaric (same nucleon number A = 116) with Cadmium-116. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 68	Isobar A = 116
38	¹⁰⁶Sr
39	¹⁰⁷Y
40	¹⁰⁸Zr
41	¹⁰⁹Nb
42	¹¹⁰Mo	¹¹⁶Mo
43	¹¹¹Tc	¹¹⁶Tc
44	¹¹²Ru	¹¹⁶Ru
45	¹¹³Rh	¹¹⁶Rh
46	¹¹⁴Pd	¹¹⁶Pd
47	¹¹⁵Ag	¹¹⁶Ag
48	¹¹⁶Cd	¹¹⁶Cd
49	¹¹⁷In	¹¹⁶In
50	¹¹⁸Sn	¹¹⁶Sn
51	¹¹⁹Sb	¹¹⁶Sb
52	¹²⁰Te	¹¹⁶Te
53	¹²¹I	¹¹⁶I
54	¹²²Xe	¹¹⁶Xe
55	¹²³Cs	¹¹⁶Cs
56	¹²⁴Ba	¹¹⁶Ba
57	¹²⁵La	¹¹⁶La
58	¹²⁶Ce
59	¹²⁷Pr
60	¹²⁸Nd
61	¹²⁹Pm
62	¹³⁰Sm
63	¹³¹Eu