Rhodium-115

Properties and data of the isotope ¹¹⁵Rh.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Rhodium-115; Rh-115Symbol:¹¹⁵Rh or 11545RhMass number A:115 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:70Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.5555555555556 (= neutron-proton ratio)Neutron excess (N-Z):25Isotopic mass:114.920311(8) u (atomic weight of Rhodium-115)Nuclide mass:114.8956262 u (calculated nuclear mass without electrons)Mass excess:-74.22983 MeVMass defect:1.03835956 u (per nucleus)Nuclear binding energy:967.22569998 MeV (per nucleus)
8.41065826 MeV (average binding energy per nucleon)Separation energy:S_N = 6.59(7) MeV (first neutron)
S_P = 11.297(8) MeV (first proton)Half-life:0.99(5) sDecay constant λ:0.70014866723227 s^-1Specific activity α:3.698591137692 × 10⁺²¹ Bq g^-1
99961922640.343 Ci g^-1Spin and parity:
(nuclear angular momentum)(7/2+)Year of discovery:1988

Radioactive Decay

Half-life T_½ = 0.99(5) s respectively 9.9 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹¹⁵Pd	100 %	6.197(15) MeV

Parent Nuclides

Direct parent isotope is: ¹¹⁵Ru.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 70) and isobaric (same nucleon number A = 115) with Rhodium-115. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 70	Isobar A = 115
39	¹⁰⁹Y
40	¹¹⁰Zr
41	¹¹¹Nb	¹¹⁵Nb
42	¹¹²Mo	¹¹⁵Mo
43	¹¹³Tc	¹¹⁵Tc
44	¹¹⁴Ru	¹¹⁵Ru
45	¹¹⁵Rh	¹¹⁵Rh
46	¹¹⁶Pd	¹¹⁵Pd
47	¹¹⁷Ag	¹¹⁵Ag
48	¹¹⁸Cd	¹¹⁵Cd
49	¹¹⁹In	¹¹⁵In
50	¹²⁰Sn	¹¹⁵Sn
51	¹²¹Sb	¹¹⁵Sb
52	¹²²Te	¹¹⁵Te
53	¹²³I	¹¹⁵I
54	¹²⁴Xe	¹¹⁵Xe
55	¹²⁵Cs	¹¹⁵Cs
56	¹²⁶Ba	¹¹⁵Ba
57	¹²⁷La
58	¹²⁸Ce
59	¹²⁹Pr
60	¹³⁰Nd
61	¹³¹Pm
62	¹³²Sm
63	¹³³Eu
64	¹³⁴Gd
65	¹³⁵Tb