Radon-193

Properties and data of the isotope ¹⁹³Rn.

Contents

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

General data

Name of the isotope:Radon-193; Rn-193Symbol:¹⁹³Rn or 19386RnMass number A:193 (= number of nucleons)Atomic number Z:86 (= number of protons)Neutrons N:107Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.2441860465116 (= neutron-proton ratio)Neutron excess (N-Z):21Isotopic mass:193.009708(27) u (atomic weight of Radon-193)Nuclide mass:192.9625358 u (calculated nuclear mass without electrons)Mass excess:9.04294 MeVMass defect:1.590390764 u (per nucleus)Nuclear binding energy:1481.43945432 MeV (per nucleus)
7.67585209 MeV (average binding energy per nucleon)Separation energy:
S_P = 1.17(4) MeV (first proton)Half-life:1.15(27) msDecay constant λ:602.73667874778 s^-1Specific activity α:1.880707347600 × 10⁺²⁴ Bq g^-1
50829928313535 Ci g^-1Spin and parity:
(nuclear angular momentum)(3/2-)Year of discovery:2006

Radioactive Decay

Half-life T_½ = 1.15(27) ms respectively 1.15 × 10^-3 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁸⁹Po	~ 100 %	8.040(12) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 107) and isobaric (same nucleon number A = 193) with Radon-193. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 107	Isobar A = 193
65	¹⁷²Tb
66	¹⁷³Dy
67	¹⁷⁴Ho
68	¹⁷⁵Er
69	¹⁷⁶Tm
70	¹⁷⁷Yb
71	¹⁷⁸Lu
72	¹⁷⁹Hf
73	¹⁸⁰Ta	¹⁹³Ta
74	¹⁸¹W	¹⁹³W
75	¹⁸²Re	¹⁹³Re
76	¹⁸³Os	¹⁹³Os
77	¹⁸⁴Ir	¹⁹³Ir
78	¹⁸⁵Pt	¹⁹³Pt
79	¹⁸⁶Au	¹⁹³Au
80	¹⁸⁷Hg	¹⁹³Hg
81	¹⁸⁸Tl	¹⁹³Tl
82	¹⁸⁹Pb	¹⁹³Pb
83	¹⁹⁰Bi	¹⁹³Bi
84	¹⁹¹Po	¹⁹³Po
85	¹⁹²At	¹⁹³At
86	¹⁹³Rn	¹⁹³Rn