Mercury-215

Properties and data of the isotope ²¹⁵Hg.

Contents

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

General data

Name of the isotope:Mercury-215; Hg-215Symbol:²¹⁵Hg or 21580HgMass number A:215 (= number of nucleons)Atomic number Z:80 (= number of protons)Neutrons N:135Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.6875 (= neutron-proton ratio)Neutron excess (N-Z):55Isotopic mass:215.01740(43) u (atomic weight of Mercury-215)Nuclide mass:214.9735184 u (calculated nuclear mass without electrons)Mass excess:16.208 MeVMass defect:1.77836622 u (per nucleus)Nuclear binding energy:1656.53746373 MeV (per nucleus)
7.70482541 MeV (average binding energy per nucleon)Separation energy:S_N = 3.04(57) MeV (first neutron)Half-life:> 300 nsDecay constant λ:2310490.6018665 s^-1Specific activity α:6.47115053437 × 10⁺²⁷ Bq g^-1
1.748959603884 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2010

Radioactive Decay

Half-life T_½ = > 300 ns respectively 3.0 × 10^-7 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	²¹⁵Tl	?	6.30(50) MeV
β^-, n	²¹⁴Tl	?	1.67(45) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 135) and isobaric (same nucleon number A = 215) with Mercury-215. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 135	Isobar A = 215
80	²¹⁵Hg	²¹⁵Hg
81	²¹⁶Tl	²¹⁵Tl
82	²¹⁷Pb	²¹⁵Pb
83	²¹⁸Bi	²¹⁵Bi
84	²¹⁹Po	²¹⁵Po
85	²²⁰At	²¹⁵At
86	²²¹Rn	²¹⁵Rn
87	²²²Fr	²¹⁵Fr
88	²²³Ra	²¹⁵Ra
89	²²⁴Ac	²¹⁵Ac
90	²²⁵Th	²¹⁵Th
91	²²⁶Pa	²¹⁵Pa
92	²²⁷U	²¹⁵U
93	²²⁸Np
94	²²⁹Pu
95	²³⁰Am