Cadmium-115

Properties and data of the isotope ¹¹⁵Cd.

Contents

General data

Name of the isotope:Cadmium-115; Cd-115Symbol:¹¹⁵Cd or 11548CdMass number A:115 (= number of nucleons)Atomic number Z:48 (= number of protons)Neutrons N:67Isotopic mass:114.9054374(7) u (atomic weight of Cadmium-115)Nuclide mass:114.879107 u (calculated nuclear mass without electrons)Mass excess:-88.08449 MeVMass defect:1.050713508 u (per nucleus)Nuclear binding energy:978.73332842 MeV (per nucleus)
8.51072459 MeV (average binding energy per nucleon)Separation energy:S_N = 6.1409(6) MeV (first neutron)
S_P = 10.443(5) MeV (first proton)Half-life:53.46(5) hDecay constant λ:3.601587794404 × 10^-6 s^-1Specific activity α:1.902567457660 × 10⁺¹⁶ Bq g^-1
514207.42098943 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2+Magnetic dipole moment:μ(μ_N) = -0.6483(2)Nuclear g-factor:g_l = -1.2966Charge radius:4.6114(46) femtometer fmYear of discovery:1939

Radioactive Decay

Half-life T_½ = 53.46(5) h (hours) respectively 1.92456 × 10⁵ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹¹⁵In	100 %	1.4519(7) MeV

Parent Nuclides

Direct parent isotope is: ¹¹⁵Ag.

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^115mCd	181.0(5) keV	44.56(24) d	(11/2)-
^115m+Cd

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 67) and isobaric (same nucleon number A = 115) with Cadmium-115. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 67	Isobar A = 115
38	¹⁰⁵Sr
39	¹⁰⁶Y
40	¹⁰⁷Zr
41	¹⁰⁸Nb	¹¹⁵Nb
42	¹⁰⁹Mo	¹¹⁵Mo
43	¹¹⁰Tc	¹¹⁵Tc
44	¹¹¹Ru	¹¹⁵Ru
45	¹¹²Rh	¹¹⁵Rh
46	¹¹³Pd	¹¹⁵Pd
47	¹¹⁴Ag	¹¹⁵Ag
48	¹¹⁵Cd	¹¹⁵Cd
49	¹¹⁶In	¹¹⁵In
50	¹¹⁷Sn	¹¹⁵Sn
51	¹¹⁸Sb	¹¹⁵Sb
52	¹¹⁹Te	¹¹⁵Te
53	¹²⁰I	¹¹⁵I
54	¹²¹Xe	¹¹⁵Xe
55	¹²²Cs	¹¹⁵Cs
56	¹²³Ba	¹¹⁵Ba
57	¹²⁴La
58	¹²⁵Ce
59	¹²⁶Pr
60	¹²⁷Nd
61	¹²⁸Pm
62	¹²⁹Sm
63	¹³⁰Eu