Rhodium-117

Properties and data of the isotope ¹¹⁷Rh.

Contents

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

General data

Name of the isotope:Rhodium-117; Rh-117Symbol:¹¹⁷Rh or 11745RhMass number A:117 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:72Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.6 (= neutron-proton ratio)Neutron excess (N-Z):27Isotopic mass:116.926036(10) u (atomic weight of Rhodium-117)Nuclide mass:116.9013512 u (calculated nuclear mass without electrons)Mass excess:-68.89702 MeVMass defect:1.049964392 u (per nucleus)Nuclear binding energy:978.03553136 MeV (per nucleus)
8.35927805 MeV (average binding energy per nucleon)Separation energy:S_N = 6.23(7) MeV (first neutron)
S_P = 12.117(10) MeV (first proton)Half-life:0.44(4) sDecay constant λ:1.5753345012726 s^-1Specific activity α:8.178350231191 × 10⁺²¹ Bq g^-1
221036492734.9 Ci g^-1Spin and parity:
(nuclear angular momentum)(7/2+)Year of discovery:1991

Radioactive Decay

Half-life T_½ = 0.44(4) s respectively 4.4 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹¹⁷Pd	100 %	7.527(11) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 72) and isobaric (same nucleon number A = 117) with Rhodium-117. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 72	Isobar A = 117
40	¹¹²Zr
41	¹¹³Nb
42	¹¹⁴Mo	¹¹⁷Mo
43	¹¹⁵Tc	¹¹⁷Tc
44	¹¹⁶Ru	¹¹⁷Ru
45	¹¹⁷Rh	¹¹⁷Rh
46	¹¹⁸Pd	¹¹⁷Pd
47	¹¹⁹Ag	¹¹⁷Ag
48	¹²⁰Cd	¹¹⁷Cd
49	¹²¹In	¹¹⁷In
50	¹²²Sn	¹¹⁷Sn
51	¹²³Sb	¹¹⁷Sb
52	¹²⁴Te	¹¹⁷Te
53	¹²⁵I	¹¹⁷I
54	¹²⁶Xe	¹¹⁷Xe
55	¹²⁷Cs	¹¹⁷Cs
56	¹²⁸Ba	¹¹⁷Ba
57	¹²⁹La	¹¹⁷La
58	¹³⁰Ce
59	¹³¹Pr
60	¹³²Nd
61	¹³³Pm
62	¹³⁴Sm
63	¹³⁵Eu
64	¹³⁶Gd
65	¹³⁷Tb
66	¹³⁸Dy