Tellurium-135

Properties and data of the isotope ¹³⁵Te.

Content

General data

Name of the isotope:Tellurium-135; Te-135Symbol:¹³⁵Te or 13552TeMass number A:135 (= number of nucleons)Atomic number Z:52 (= number of protons)Neutrons N:83Isotopic mass:134.9165547(18) u (atomic weight of Tellurium-135)Nuclide mass:134.8880303 u (calculated nuclear mass without electrons)Mass excess:-77.7288 MeVMass defect:1.209534992 u (per nucleus)Nuclear binding energy:1126.67458784 MeV (per nucleus)
8.34573769 MeV (average binding energy per nucleon)Separation energy:S_N = 3.266(3) MeV (first neutron)
S_P = 10.9972(24) MeV (first proton)Half-life:19.0(2) sDecay constant λ:0.036481430555787 s^-1Specific activity α:1.639524728201 × 10⁺²⁰ Bq g^-1
4431147914.057 Ci g^-1Spin and parity:
(nuclear angular momentum)(7/2-)Magnetic dipole moment:μ(μ_N) = - 0.69(5)Quadrupole moment Q:0.29(9) barn (100 fm²)Nuclear g-factor:g_l = -0.19714285714286Year of discovery:1969

Radioactive Decay

Half-life T_½ = 19.0(2) s respectively 1.90 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹³⁵I	100 %	6.0504(27) MeV

Parent Nuclides

Direct parent isotopes are: ¹³⁵Sb, ¹³⁶Sb, ²⁴⁸Cm, ²⁵²Cf.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 83) and isobaric (same nucleon number A = 135) with Tellurium-135. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 83	Isobar A = 135
46	¹²⁹Pd
47	¹³⁰Ag
48	¹³¹Cd
49	¹³²In	¹³⁵In
50	¹³³Sn	¹³⁵Sn
51	¹³⁴Sb	¹³⁵Sb
52	¹³⁵Te	¹³⁵Te
53	¹³⁶I	¹³⁵I
54	¹³⁷Xe	¹³⁵Xe
55	¹³⁸Cs	¹³⁵Cs
56	¹³⁹Ba	¹³⁵Ba
57	¹⁴⁰La	¹³⁵La
58	¹⁴¹Ce	¹³⁵Ce
59	¹⁴²Pr	¹³⁵Pr
60	¹⁴³Nd	¹³⁵Nd
61	¹⁴⁴Pm	¹³⁵Pm
62	¹⁴⁵Sm	¹³⁵Sm
63	¹⁴⁶Eu	¹³⁵Eu
64	¹⁴⁷Gd	¹³⁵Gd
65	¹⁴⁸Tb	¹³⁵Tb
66	¹⁴⁹Dy
67	¹⁵⁰Ho
68	¹⁵¹Er
69	¹⁵²Tm
70	¹⁵³Yb
71	¹⁵⁴Lu
72	¹⁵⁵Hf
73	¹⁵⁶Ta
74	¹⁵⁷W