Antimony-115

Properties and data of the isotope ¹¹⁵Sb.

Content

General data

Name of the isotope:Antimony-115; Sb-115Symbol:¹¹⁵Sb or 11551SbMass number A:115 (= number of nucleons)Atomic number Z:51 (= number of protons)Neutrons N:64Isotopic mass:114.906598(17) u (atomic weight of Antimony-115)Nuclide mass:114.8786221 u (calculated nuclear mass without electrons)Mass excess:-87.0034 MeVMass defect:1.047033256 u (per nucleus)Nuclear binding energy:975.30519576 MeV (per nucleus)
8.48091475 MeV (average binding energy per nucleon)Separation energy:S_N = 10.578(27) MeV (first neutron)
S_P = 3.733(16) MeV (first proton)Half-life:32.1(3) minDecay constant λ:0.00035988950184836 s^-1Specific activity α:1.901144977318 × 10⁺¹⁸ Bq g^-1
51382296.684289 Ci g^-1Spin and parity:
(nuclear angular momentum)5/2+Magnetic dipole moment:μ(μ_N) = + 3.46(1)Quadrupole moment Q:- 0.36(6) barn (100 fm²)Nuclear g-factor:g_l = 1.384Year of discovery:1958

Radioactive Decay

Half-life T_½ = 32.1(3) min (minutes) respectively 1.926 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹¹⁵Sn	100 %	3.030(16) MeV

Parent Nuclides

Direct parent isotope is: ¹¹⁵Te.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 64) and isobaric (same nucleon number A = 115) with Antimony-115. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 64	Isobar A = 115
36	¹⁰⁰Kr
37	¹⁰¹Rb
38	¹⁰²Sr
39	¹⁰³Y
40	¹⁰⁴Zr
41	¹⁰⁵Nb	¹¹⁵Nb
42	¹⁰⁶Mo	¹¹⁵Mo
43	¹⁰⁷Tc	¹¹⁵Tc
44	¹⁰⁸Ru	¹¹⁵Ru
45	¹⁰⁹Rh	¹¹⁵Rh
46	¹¹⁰Pd	¹¹⁵Pd
47	¹¹¹Ag	¹¹⁵Ag
48	¹¹²Cd	¹¹⁵Cd
49	¹¹³In	¹¹⁵In
50	¹¹⁴Sn	¹¹⁵Sn
51	¹¹⁵Sb	¹¹⁵Sb
52	¹¹⁶Te	¹¹⁵Te
53	¹¹⁷I	¹¹⁵I
54	¹¹⁸Xe	¹¹⁵Xe
55	¹¹⁹Cs	¹¹⁵Cs
56	¹²⁰Ba	¹¹⁵Ba
57	¹²¹La
58	¹²²Ce
59	¹²³Pr
60	¹²⁴Nd