Cadmium-115m

Properties and data of the isotope ^115mCd.

Contents

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

General data

Name of the isotope:Cadmium-115m; Cd-115mSymbol:^115mCd or 115m48CdMass 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-115m)
Excitation energy: 181.0(5) keVNuclide 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)Half-life:44.56(24) dDecay constant λ:1.80038976930 × 10^-7 s^-1Specific activity α:9.510702450492 × 10⁺¹⁴ Bq g^-1
25704.601217548 Ci g^-1Spin and parity:
(nuclear angular momentum)(11/2)-Magnetic dipole moment:μ(μ_N) = -1.0394(6)Quadrupole moment Q:- 0.54(5) barn (100 fm²)Nuclear g-factor:g_l = -0.18898181818182

Radioactive Decay

Half-life T_½ = 44.56(24) d respectively 3.849984 × 10⁶ seconds s.

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

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
¹¹⁵Cd		53.46(5) h	1/2+
^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-115m. 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