Rhodium-116m

Properties and data of the isotope ^116mRh.

Contents

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

General data

Name of the isotope:Rhodium-116m; Rh-116mSymbol:^116mRh or 116m45RhMass number A:116 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:71Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.5777777777778 (= neutron-proton ratio)Neutron excess (N-Z):26Excitation energy:150 keVIsotopic mass:115.92406(8) u (atomic weight of Rhodium-116m)Nuclide mass:115.8993752 u (calculated nuclear mass without electrons)Mass excess:-70.73765 MeVMass defect:1.043275476 u (per nucleus)Nuclear binding energy:971.80484624 MeV (per nucleus)
8.37762798 MeV (average binding energy per nucleon)Half-life:0.57(5) sDecay constant λ:1.2160476851929 s^-1Specific activity α:6.368009089244 × 10⁺²¹ Bq g^-1
172108353763.37 Ci g^-1Spin and parity:
(nuclear angular momentum)(6-)

Radioactive Decay

Half-life T_½ = 0.57(5) s respectively 5.7 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹¹⁶Pd	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
¹¹⁶Rh		0.68(6) s	1+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 71) and isobaric (same nucleon number A = 116) with Rhodium-116m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 71	Isobar A = 116
40	¹¹¹Zr
41	¹¹²Nb
42	¹¹³Mo	¹¹⁶Mo
43	¹¹⁴Tc	¹¹⁶Tc
44	¹¹⁵Ru	¹¹⁶Ru
45	¹¹⁶Rh	¹¹⁶Rh
46	¹¹⁷Pd	¹¹⁶Pd
47	¹¹⁸Ag	¹¹⁶Ag
48	¹¹⁹Cd	¹¹⁶Cd
49	¹²⁰In	¹¹⁶In
50	¹²¹Sn	¹¹⁶Sn
51	¹²²Sb	¹¹⁶Sb
52	¹²³Te	¹¹⁶Te
53	¹²⁴I	¹¹⁶I
54	¹²⁵Xe	¹¹⁶Xe
55	¹²⁶Cs	¹¹⁶Cs
56	¹²⁷Ba	¹¹⁶Ba
57	¹²⁸La	¹¹⁶La
58	¹²⁹Ce
59	¹³⁰Pr
60	¹³¹Nd
61	¹³²Pm
62	¹³³Sm
63	¹³⁴Eu
64	¹³⁵Gd
65	¹³⁶Tb