Niobium-115

Properties and data of the isotope ¹¹⁵Nb.

Contents

General data

Name of the isotope:Niobium-115; Nb-115Symbol:¹¹⁵Nb or 11541NbMass number A:115 (= number of nucleons)Atomic number Z:41 (= number of protons)Neutrons N:74Isotopic mass:114.96634(54) u (atomic weight of Niobium-115)Nuclide mass:114.9438492 u (calculated nuclear mass without electrons)Mass excess:-31.35409 MeVMass defect:0.995690096 u (per nucleus)Nuclear binding energy:927.47935028 MeV (per nucleus)
8.06503783 MeV (average binding energy per nucleon)Separation energy:S_N = 4.04(71) MeV (first neutron)Half-life:23(8) msDecay constant λ:30.136833937389 s^-1Specific activity α:1.592002272311 × 10⁺²³ Bq g^-1
4302708844084.3 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2010

Radioactive Decay

Half-life T_½ = 23(8) ms respectively 2.3 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy
β^-	¹¹⁵Mo		13.39(64) MeV
β^-, n	¹¹⁴Mo	?	10.38(58) MeV
β^-, 2n	¹¹³Mo	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 74) and isobaric (same nucleon number A = 115) with Niobium-115. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 74	Isobar A = 115
41	¹¹⁵Nb	¹¹⁵Nb
42	¹¹⁶Mo	¹¹⁵Mo
43	¹¹⁷Tc	¹¹⁵Tc
44	¹¹⁸Ru	¹¹⁵Ru
45	¹¹⁹Rh	¹¹⁵Rh
46	¹²⁰Pd	¹¹⁵Pd
47	¹²¹Ag	¹¹⁵Ag
48	¹²²Cd	¹¹⁵Cd
49	¹²³In	¹¹⁵In
50	¹²⁴Sn	¹¹⁵Sn
51	¹²⁵Sb	¹¹⁵Sb
52	¹²⁶Te	¹¹⁵Te
53	¹²⁷I	¹¹⁵I
54	¹²⁸Xe	¹¹⁵Xe
55	¹²⁹Cs	¹¹⁵Cs
56	¹³⁰Ba	¹¹⁵Ba
57	¹³¹La
58	¹³²Ce
59	¹³³Pr
60	¹³⁴Nd
61	¹³⁵Pm
62	¹³⁶Sm
63	¹³⁷Eu
64	¹³⁸Gd
65	¹³⁹Tb
66	¹⁴⁰Dy
67	¹⁴¹Ho